Backend Software Engineer - Location Intelligence

Join daangn as a Backend Software Engineer and be part of a dynamic team dedicated to revolutionizing the commerce landscape. In this role, you will work on innovative backend systems that enhance user experience and operational efficiency.

Join our innovative team at daangn as a Backend Software Engineer, where you'll be responsible for developing robust backend systems that power our lessons and tutoring services. You will work with cutting-edge technologies to enhance user experience and drive our mission forward.

Welcome to the journey of joining the Daangn team!At Daangn, we strive to create an environment where individuals can grow alongside the company's development.Our recruitment team is here to assist you in making the moment of collaborating with amazing colleagues a joyful reality. Introducing the Advertising TeamThe Advertising Team is responsible for the core advertising services that drive Daangn's revenue model. We operate an advertising platform targeting Daangn's 19 million monthly active users (MAU), providing effective advertising opportunities for both small businesses and large enterprises through localized advertising solutions. Our ongoing improvements can significantly impact advertisers' performance and Daangn's revenue, as we continuously evolve our services through data-driven decision-making and constant experimentation. The Advertising Team plays a pivotal role in balancing user experience with advertising effectiveness, ensuring we deliver useful and relevant ads while preserving Daangn's core values of community communication and transaction experiences. We develop various advertising formats and targeting options, leveraging machine learning technology to optimize advertising performance. Additionally, the team participates in crucial decision-making processes from an organizational perspective. Since ads are displayed across multiple app surfaces, we must consider not only ad performance but also the overall health of the service and user satisfaction. Therefore, we adopt a comprehensive approach that considers the needs of advertisers, user experience, and our business objectives. Within the Advertising Team, you'll engage in diverse tasks such as developing new advertising products, enhancing the advertising platform, analyzing and optimizing ad performance, and managing advertiser relationships. If you want to make an impact in a rapidly evolving advertising market grounded in innovative ideas and analytical thinking, the Advertising Team is the perfect choice for you. Learn more about the Daangn Advertising Team!Your ResponsibilitiesGrow into an expert handling large-scale advertising traffic.Daangn Market is a massive platform with 19 million MAU. Operating an advertising system reliably in this large-scale environment presents both challenges and opportunities. By joining the Advertising Team, you will work with systems that handle hundreds of millions of ad requests daily. You will learn how to respond to various issues that arise, enhancing your skills in building high-availability systems and practical problem-solving. Specifically, in the Serving Team, you will work with a Real-Time Bidding (RTB) system that demands millisecond-level response times, allowing you to acquire skills in designing and implementing ultra-low latency distributed systems. In the DSP Team, you will develop performance optimization and scalable architecture for processing large volumes of advertising data.Gain experience in data-driven decision-making and optimization.As a developer in the Advertising Team, you will handle vast amounts of user and ad performance data. You will have the opportunity to build and optimize pipelines for efficiently collecting, processing, and analyzing this data, enhancing your skills in big data processing technologies, data warehousing, and real-time data streaming. Additionally, you will gain hands-on experience applying machine learning models to real advertising systems, utilizing AI/ML technologies in areas such as user targeting, ad performance prediction, and real-time bid price determination to continuously improve the advertising system.Experience solving technical challenges in a continuously growing service.Daangn is in a constant state of growth. As such, the advertising system is continually expanding, with new features being added. You will experience evolving the system to accommodate various changes such as new ad product launches, expanded targeting options, and improved ad effectiveness measurement. For example, in the DSP Team, you'll be developing logic for new ad formats, integrating new data sources, and in the Serving Team, implementing new ad display methods, tackling various challenges that arise. Through this process, you’ll be able to learn about and apply the latest technological trends, significantly enhancing your technical capabilities.Design and operate microservices architecture directly.The Advertising Team adopts a microservices architecture, allowing you to design and implement independent microservices across different domains such as DSP, DMP, and recommendation systems. This experience will enable you to apply core concepts of microservices architecture, including inter-service communication, API design, and distributed transaction handling.

Welcome to Your Journey with daangn!At daangn, we strive to cultivate an environment where individuals can grow alongside the company as we evolve.The daangn recruitment team is here to assist you in reaching moments of meaningful collaboration with wonderful colleagues. Introducing the Identity Service TeamThe Identity Service team is responsible for managing membership and authentication at daangn. We develop a range of features related to authentication and user management to ensure that all customers can use our services safely and smoothly. We aspire to create a world where every local service is connected through daangn, aligning our growth with scalable and secure membership services. We continuously explore ways to provide a better user experience while safeguarding personal information and ensuring customer safety.How the Identity Service Team OperatesHealthy Conflicts for Better OutcomesWe embrace constructive disagreement for improved results. By respecting each other and engaging in open discussions, we make better decisions.Prioritizing Purpose Over MeansWhat we aim to achieve is of utmost importance. We select the appropriate means aligned with our goals and remain vigilant to ensure that means do not overshadow our purpose.Thinking Beyond the Team for Company-Wide ImpactWe consistently consider ways to create greater value across the organization, moving beyond simple problem-solving.Vision for Present and Future GrowthWe focus on sustainable choices that remain viable even after significant growth, not just immediate solutions. Technologies Used by the Identity Service TeamGo, gRPC, gRPC-GatewayMySQL, Redis, KafkaKubernetes, Istio Daangn Tech Meetups#1 Separating daangn's Membership System into Microservices#2 Life After Separation into MSA: Growth of Go Server#3 Replacing the Lock Mechanism of a Running Car: Centralization of Authentication Systems Daangn Tech Blog Link to Blog

Join our dynamic team at Daangn as a Frontend Software Engineer dedicated to building engaging community platforms. You will be responsible for developing user-friendly web applications that enhance user experiences and foster community interaction. Collaborate with cross-functional teams to design and implement innovative solutions that meet the needs of our users.

Join the daangn Team!At daangn, we strive to create an environment where individuals can grow alongside the company. The daangn recruitment team is here to help you connect with amazing colleagues and tackle exciting challenges together. About the iOS Engineer RoleThe iOS engineers at daangn are part of a dedicated chapter, collaborating closely within their teams. Within the iOS chapter, we prioritize building high-quality applications, as they are the first interaction point for our users. We take great responsibility in ensuring stability and delivering a polished service.The iOS chapter places equal importance on both company growth and individual development. Through activities such as Engineering Day, code reviews, and tech talks, we share our technical skills and domain knowledge while collectively brainstorming improvements. We also host study groups and seminars to foster a better development culture and support personal growth in iOS development.Your Responsibilities[Used Goods Trading Team]Develop a location-based used goods trading service targeting users in Korea and globally.Manage over 10 million products worldwide, creating solutions that address user issues and align with company goals.Enhance the user experience in used goods trading by experimenting with diverse ideas based on data. [Mobile Team]Operate new and shared services to make daangn Market the best local app.Support the easy development of various services and enhance productivity through improved development environments.Design a sustainable architecture for building a super app and tackle various technical challenges. [Common Responsibilities]Participate in iOS chapter activities such as Engineering Day and Tech Talks.Develop various features contributing to daangn services.Who We Are Looking ForIndividuals with at least 3 years of experience in iOS development.People who enjoy designing and implementing new features.Candidates with a user-centric mindset over a purely technical approach.Self-motivated individuals who excel in communication.Familiarity with writing testable code.Preferred QualificationsExperience in developing large-scale services.Contributions to iOS-related open-source projects or personal open-source projects.Experience in global services.Experience in designing code using Dependency Injection (DI).Additional InformationFull-time employment includes a 3-month probation period.We prioritize applicants with disabilities or veterans according to the Employment Promotion and Rehabilitation Act.Tools we currently use include: RxSwift, FlexLayout, PinLayout, and many others.

Join Daangn as a Frontend Software Engineer Intern and contribute to creating exceptional user experiences for our platform. This is an exciting opportunity to work under the guidance of seasoned professionals in a dynamic environment.

Welcome to the Journey of Joining the Daangn Team!At Daangn, we strive to create an environment where individuals can grow alongside the company as it evolves.Our recruitment team is here to help you reach that moment of engaging in meaningful discussions with wonderful colleagues. Introducing MyKarrot Task ForceThe MyKarrot Task Force is dedicated to transforming the 'My Karrot' tab into a pivotal space for enhancing user engagement across the Daangn platform. Users tend to navigate to the 'My Karrot' tab after taking actions, and our team believes it can evolve from a simple user page into a personalized hub that facilitates their subsequent actions.Daangn is focused on creating diverse experiences centered around hyper-local services, including secondhand trading, part-time jobs, real estate, and community interactions. While each service has its unique growth phase and strategy, they are all interconnected within the context of users' neighborhood lives. Our team is committed to bridging these services with user activities, presenting the right actions and information at the perfect moments.Long-term, we envision 'My Karrot' as a space where relationships and transactions build, making it easier for users to initiate their next activities. The primary goal of the MyKarrot Task Force is to create a more organic connection among various services within Daangn, enabling users to seamlessly continue their actions.ResponsibilitiesDesign and develop the server for the Server Driven UI (SDUI) that comprises the 'My Karrot' tab.Create an environment for experimenting with the 'My Karrot' tab UI based on user behavior patterns.Develop systems that connect various services' contexts with user activities to enhance the 'My Karrot' experience.Decompose existing legacy services related to 'My Karrot' and gradually transition traffic.We are looking for candidates who have:3+ years of backend development experience or equivalent engineering capabilities.Experience in designing and operating services based on Kotlin, Spring Boot, and RDBMS.A user-centric mindset for product development.Self-motivation, excellent communication skills, and the ability to execute tasks promptly.Additional Preferred QualificationsExperience in identifying problems and implementing improvements by analyzing user behavior data and metrics.Experience in leveraging AI/LLM to enhance development productivity or attempt novel problem-solving methods.Additional InformationFull-time positions include a 3-month probation period.We prioritize candidates with disabilities and veterans in accordance with the 'Act on the Promotion of Employment for the Disabled' and 'Act on the Honorable Treatment and Support of Veterans'.Application Process1. Document screening → 2. Video interview → 3. Job interview → 4. Culture fit interview and reference check → 5. Compensation negotiation → 6. Final acceptance and onboardingGo to the Daangn joining journey guide()

Welcome to the Journey of Joining the Daangn Team!At Daangn, we strive to create an environment where individuals can grow alongside the company as it evolves.Our recruitment team is here to assist you in the moments where great colleagues can spark joyful challenges. Introducing Local BusinessOur Local Business team is dedicated to creating services that connect local shop owners with their neighbors. We provide touchpoints for Daangn users to discover local store information more effectively while equipping shop owners with tools to engage with local customers.The Order Experience team helps neighbors utilize local stores more conveniently and reasonably. Through our pickup (takeout orders) and QR order (table orders) products, we connect offline stores to the online world, offering neighbors savings and convenience while ensuring store owners gain loyal customers and increased sales.We are not just creating a simple ordering system; we are implementing the 'warmest transaction experience in our neighborhood' through technology. This process fosters a sustainable local ecosystem that energizes stores, neighbors, and the community at large.Key ResponsibilitiesDesign, develop, and operate the core backend systems for Daangn's QR order and pickup products.Handle various domains such as business profiles, orders, payments, menus, and points, generating suitable outputs for product stages and evolving them into sustainable systems.Ensure stable integration with POS, PG, and external systems.Collaborate closely with product planning, design, frontend, and business development teams to enhance product quality.Ideal CandidateExperience in designing and operating services based on Kotlin, Java, and the Spring Framework.Solid foundation in RESTful API design, DB modeling, and cache/transaction management.Proactive, effective communicator, with the ability to execute quickly.Ability to understand business objectives and connect technical decisions with product impact.A passion for receiving and providing feedback to foster mutual growth with colleagues.Preferred QualificationsAbility to define problems and execute solutions swiftly, even in uncertain environments.Experience operating real services in F&B, O2O, or payment/order systems.A desire to grow with a product in its early stages while contributing to technical foundations and organizational culture.Strong understanding of distributed processing systems or microservices architecture.Interest in the local commerce ecosystem.Additional InformationFor full-time positions, there is a 3-month probation period.In accordance with the 'Act on the Promotion of Employment for Persons with Disabilities' and the 'Act on the Honorable Treatment and Support of Veterans', individuals with disabilities and veterans are given preference during the hiring process.Application Process1. Document screening → 2. Video interview → 3. Job interview → 4. Cultural fit interview and reference check → 5. Negotiation of terms → 6. Final acceptance and onboarding. Click here for the Daangn Joining Journey Guide ()

Welcome to Your Journey with daangn!At daangn, we strive to foster an environment where individual growth aligns with company development.The daangn recruitment team is here to assist you in experiencing the joy of engaging with wonderful colleagues! Introducing the Search Quality TeamThe Search Quality Team focuses on revolutionizing the search experience at daangn by utilizing machine learning and natural language processing technologies to deliver personalized results. Our mission is to help users find the information they desire quickly and accurately through a contextual understanding of neighborhood life. The team is divided into three parts: Search Vertical, Search Fleamarket, and Search Place, with each ML engineer specializing in models tailored to various domains such as second-hand trading, local living, and maps.Your RoleUnderstand user search intent to recommend personalized keywords, collections, and products.Enhance search quality using natural language processing, graph-based models, and personalization algorithms.Design lightweight architectures for real-time model serving.Manage experiments and operations for model improvements in collection ranking, knowledge graphs, and keyword suggestions.We Are Looking ForExperience in designing and operating machine learning-based recommendation/search/ranking systems.Background in developing natural language processing (NLP) or graph-based recommendation systems.Experience building Python-based machine learning training pipelines.Experience in experimental design and A/B testing using large datasets.Experience in system implementation considering model serving and performance optimization.Bonus Points If You HaveModeling experience with search query auto-completion, related search terms, and typo correction.Experience serving real-time deep learning model inference.Experience leading specific domains (ranking/recommendation) with ownership in an ML engineering team.Please NoteOnboarding content and responsibilities may vary according to your capabilities.Full-time hires will undergo a 3-month probation period.According to the 'Act on the Promotion of Employment for the Disabled' and the 'Act on the Honorable Treatment and Support of Veterans', candidates with disabilities and veterans will receive preferential treatment during the recruitment process.The Application Process1. Document Screening → 2. Video Interview → 3. Job Interview → 4. Culture Fit Interview → 5. Final Acceptance → 6. JoiningGo to daangn's Joining Journey Guide ()

Welcome to the Journey of Joining daangn Team!At daangn, we strive to create an environment where individuals can grow alongside the company's expansion. We are dedicated to facilitating moments of joy and collaboration with wonderful colleagues. Introducing the Network TeamThe Network Team aims to deliver secure and high-speed network services to daangn customers. We design and operate a network environment optimized for hyperlocal businesses and a global service network, ensuring that daangn users remain seamlessly connected while being responsible for infrastructure stability and scalability.We enhance efficiency by automating repetitive operational tasks and visualize traffic flow and status across the network in real-time to quickly detect issues and respond proactively. Our core role also involves maintaining service quality during traffic surges and protecting the platform from network security threats.Key ResponsibilitiesDesign and operate daangn's Service/Office Network Architecture (Cloud, Wired, Wireless).Design and operate Network Security Architecture.Develop and operate Network Observability and Automation platforms.Ideal CandidateMinimum of 5 years of practical experience in Network Engineering.Understanding and operational experience with routing protocols such as OSPF and BGP.Experience with AWS or GCP cloud network environments (VPC, TGW, NAT Gateway, Cloud WAN, Direct Connect, Cloud Router, Interconnect).Experience operating wired and wireless network devices (Router, Switch, Wireless Controller, Access Point).Experience with NGFW, IPSEC VPN, and SSL VPN (ZTNA) (AWS Network Firewall, Palo Alto, Fortinet).Experience in building network monitoring systems.Ability to troubleshoot through network packet analysis.No restrictions on overseas travel.Preferred QualificationsExperience in network operations within IT companies or large-scale cloud service environments.Deep understanding of Kubernetes environments.Strong knowledge of Zero Trust frameworks.Experience analyzing network packets to block pattern and signature-based security threats.Interest in developing or automating network monitoring platforms (Go, Python, etc.).Proficient with IaC tools such as Terraform or Ansible.Additional InformationFull-time roles include a 3-month probation period.We prioritize candidates with disabilities and veterans in accordance with the 'Act on the Promotion of Employment of Disabled Persons' and 'Act on the Honorable Treatment and Support of Veterans'.Successful video interview candidates will be given assignments, which will be discussed in the role interview.Application Process1. Document screening → 2. Video interview → 3. Role interview (assignment) → 4. Culture fit interview and reference check → 5. Offer.

Welcome to the daangn Team!At daangn, we strive to create an environment where individuals can grow alongside the company’s success.We are here to assist you in making meaningful connections with fantastic colleagues. Introducing the Data Valuation TeamThe daangn team is dedicated to discovering valuable information that connects neighborhoods and resolving inconveniences in local living. To generate this user value, we must provide easy access to reliable information for decision-making. While we already utilize vast amounts of data for our decisions, maximizing the value of our data requires substantial change.The vision of the Data Valuation Team is to "make user-centric decisions through daily data utilization." We take the lead in addressing and solving the issues of data valuation.Role of the Data Analytics EngineerThe Data Analytics Engineer ensures that data is utilized reliably and consistently, working across data modeling, engineering, and analysis to deliver value to the business and its users.In the diverse service environment of daangn, the Data Analytics Engineer will design and improve the overall flow of data collection to utilization, enabling analysts, engineers, and product teams to leverage data reliably.Moreover, the role involves designing data marts, managing quality, operating data governance frameworks, and performing basic analyses or experiments to support data-driven decision-making. Discover the Journey of the Data Valuation Team with daangn (Google Data Webinar) Learn about daangn's Metric Platform KarrotMetrics The 7 Challenges daangn Faced While Implementing DBT and Airflow How daangn's Data Engineers Simplified Modeling with DBT (2024 Data Conference) Mapping daangn Data: Column Level Lineage Building No Need to Always Pull Everything? Building MongoDB CDC at daangn Why daangn Implements User Activation Engagement in 3 Key Areas

Welcome to the Journey of Joining the Daangn Team!At Daangn, we strive to create an environment where individuals can grow alongside the company's growth.The Daangn recruitment team is here to help facilitate those moments of thoughtful collaboration with wonderful colleagues. Introducing the Data Value TeamThe Daangn team is dedicated to uncovering valuable information within local neighborhoods and resolving inconveniences in regional living. To create user value, it's essential to provide trustworthy information that users can easily access and incorporate into their decision-making. While Daangn already utilizes extensive data for decision-making, maximizing the value of our data requires significant changes.The vision of the Data Value Team is to make decisions for users through data every day. To realize this vision, we proactively tackle challenges in data value realization and lead the way in solving them.About the Data Software Engineer RoleThe Data Software Engineer plays a crucial role in addressing the challenges that arise during the process of data value realization through software engineering.In alignment with Daangn's rapid growth, you will design data systems that will not become bottlenecks in the future. You will ensure data reliability through automated testing and system observability. Additionally, you will solve technical problems that arise as Daangn members seek to understand users through data, thereby exponentially enhancing data-informed decision-making through data products (indicator platforms, experiment platforms, etc.).The mission of the Data Value Team's engineers is to facilitate a seamless flow of high-quality data at Daangn, enabling the creation of value without bottlenecks. Discover the Journey of the Data Value Team Growing with Daangn (Google Data Webinar) Learn about Daangn's Indicator Platform, KarrotMetrics Seven Challenges Daangn Faced in Implementing DBT and Airflow Tips for Easy Modeling with DBT from Daangn's Data Engineer (2024 Data Conference) Creating a Data Map at Daangn: Building Column Level Lineage No Need to Always Fetch Everything? Daangn's MongoDB CDC Build

Welcome to the Daangn Team Journey!At Daangn, we are committed to creating an environment where individuals can grow alongside the company's success.Our recruitment team is here to help you engage in meaningful discussions with wonderful colleagues. Introducing the Notifications TeamThe Notifications Team plays a crucial role in shaping the user notification experience at Daangn. Notifications serve as the most powerful channel to reconnect users with the app outside of it. This direct interaction on the user’s phone lock screen can influence the behavior of our 20 million monthly active users. We are not just a team that sends notifications; we design the moments that bring users back to Daangn and guide them to their next actions.The notification experience goes beyond a single push notification. It can lead users directly to chatrooms or posts, and help them rediscover missed interactions within the app's notification center. While push notifications initiate actions, the notification center serves as a space to reconnect relationships and context. Our team collaborates to design these two experiences, fostering connections both inside and outside of Daangn.Daangn encompasses more than 15 services at different stages of growth, including second-hand trading, part-time jobs, real estate, and community forums. The Notifications Team develops a comprehensive experience that ensures notifications reach users meaningfully and translate seamlessly into actions.We are currently moving beyond traditional formulas to discover new strategies for Daangn's next growth phase. In our small team, engineers contribute to defining problems, proposing directions, and designing experiments that shape the future of our products.Your ResponsibilitiesRedesign the notification center to enable users to quickly grasp and act on notifications from over 15 services, focusing on list structure, grouping, read/unread status, personalization, and filtering.Implement seamless entry experiences for users who tap on push notifications, guiding them to appropriate contexts like chatrooms, posts, or specific service pages.Develop the frontend for tools that precisely target and manage notifications based on user segments, banners, and event flows, creating a foundation for faster experimentation.Collaboratively build an experimental environment to measure click-through rates, conversion rates, and incremental effects, enabling rapid A/B testing.Work closely with PMs and designers to provide input on product direction based on technical feasibility and constraints.We Are Looking ForIndividuals with over 3 years of frontend development experience.Experience in developing mobile webview applications.A strong commitment to delivering high-quality user experiences.Ability to understand product goals and context, and to collaboratively explore better solutions beyond just implementation.Flexibility to adapt in a fast-paced environment requiring rapid experimentation and iteration.Additional Preferred QualificationsExperience developing frontends for user communication channels such as push notifications, in-app messages, and notification centers.Familiarity with building A/B testing infrastructure or experience in experimental development cycles.Experience utilizing design systems or component design.Experience building platform frontends that integrate with various services.Experience in performance optimization, loading strategies, and list rendering in large-scale user environments.Additional InformationFor full-time positions, there is a 3-month probation period.We prioritize the hiring of individuals with disabilities and veterans as per the 'Act on the Promotion of Employment of Persons with Disabilities' and 'Act on the Honorable Treatment and Support of Veterans'.Application Process1. Document screening → 2. Video interview (live coding test) → 3. Job interview → 4. Culture fit interview and reference check → 5. Negotiation → 6. Final acceptance and onboarding

Welcome to daangn Team JourneyAt daangn, we are committed to creating an environment where individuals can grow alongside the company's expansion.We, the daangn recruitment team, are here to assist you in having those moments of joyful contemplation with wonderful colleagues. Introducing the Data Analyst Roledaangn's vision is to foster a warm and active community by connecting neighbors. To achieve this vision, we continuously enhance our products through informed decision-making. As a Data Analyst, you will play a crucial role in improving the quality of these decisions through data analysis.The Data Analyst at daangn will uncover insights regarding user needs and product development directions by analyzing vast amounts of data generated from our products. By closely communicating with various teams, you will define data analysis tasks that address the problems we need to solve and convey the insights gained in an understandable manner to all team members. This process will guide our decision-making in the right direction, contributing to daangn's growth.Your ResponsibilitiesYou will belong to the Data Analyst Chapter while also being affiliated with specific business or organization teams.Define data analysis tasks necessary for product growth and user experience improvement, analyzing diverse data dimensions such as product, user behavior, marketing, and revenue to provide insights and strategies.Systematize and structure the company's goals and team objectives through measurable indicators, creating an accessible environment for all team members.Set indicators and hypotheses for goal achievement, proposing action items through A/B test design and interpretation.Structure and convey insights from analyses in an easily understandable manner for team members.Lead the team's data-driven decision-making culture.We Are Looking ForA candidate with experience in web/app data analysis and a proven track record of product improvement.A problem-solver who can define complex issues and think multidimensionally about various hypotheses.An individual with a solid understanding of mobile service data analysis methods (such as AARRR).Experience or knowledge in designing and executing A/B tests to drive product improvements.Proficiency in SQL (BigQuery), Python, and capable of efficiently querying and processing data.A communicator who can effectively convey data-driven decisions to team members.Preferred QualificationsExperience in utilizing data to propose strategies and achieve business impact.Hands-on experience in the entire data modeling process for analysis.A keen interest in marketing data analysis and marketing automation, familiar with tools like Appsflyer and Adjust.

Welcome to the Journey of Joining the Daangn Team!At Daangn, we are committed to creating an environment where individuals can grow alongside the company's success.The Daangn recruitment team is here to ensure that you can engage in meaningful discussions with wonderful colleagues. Introducing the Software Engineer, Machine Learning RoleThe Software Engineer specializing in Machine Learning at Daangn leverages machine learning to enhance various services, ultimately improving user satisfaction and fostering connections within local communities. This role involves recommending personalized and engaging content for users on home feeds and detail pages, as well as facilitating efficient advertising to help local residents promote their offerings.Key Responsibilities[Feed Quality Team]Develop and enhance ML models to boost user engagement and foster diverse and serendipitous discoveries on the feed.Analyze data to formulate hypotheses, identify improvements based on theoretical foundations, and validate through online experiments to achieve tangible service impact.Develop and refine models for a deeper understanding of users and content.Utilize LLM in various ways to enhance personalized recommendations.[Advertising Recommendation Team]Develop and improve CTR and CVR prediction models, as well as automated bidding, targeting, and pacing models for ad recommendations and rankings.Analyze user behavior data and advertising performance, formulating data-driven hypotheses and validating them through A/B tests to enhance both advertising efficiency and user experience.Recommend meaningful ads to users through candidate ad extraction and ranking models that consider personalization.Enhance advertising targeting accuracy using LLM and the latest AI technologies, deepening the understanding of users and ad content.Who We're Looking ForIndividuals with a solid foundation in machine learning theory and principles.A deep understanding of deep learning (Recommendation, NLP, Graph Neural Networks, Reinforcement Learning, Vision, or more).Experience in conceptualizing efficient code architecture and writing readable code.Preferred QualificationsExperience making a tangible impact on user services through machine learning in a data-driven environment.A keen interest in the latest machine learning and deep learning trends, enjoying reading relevant papers.Experience with ML-based recommendation and advertising systems.Experience deploying machine learning models and systems in large-scale production environments.Familiarity with BigQuery, Cloud Dataflow, Kubeflow, TFX, and TF Serving.Additional InformationThis full-time position includes a 3-month probation period.In accordance with the 'Act on the Promotion of Employment for Persons with Disabilities' and the 'Act on the Honorable Treatment and Support of Veterans', individuals with disabilities and veterans are given preference during the recruitment process.Video interviews will include live coding tests and a brief assessment of ML fundamentals. Please prepare your PC environment for a smooth testing experience.

Welcome to the daangn Team!At daangn, we strive to create an environment where individuals can grow alongside the company, matching our growth with personal development.Our recruitment team is here to help ensure that you experience those moments of joyful collaboration with wonderful colleagues. Meet the Database TeamThe daangn Database Team supports four DBMS: MySQL, PostgreSQL, MongoDB, and DynamoDB. Unlike many companies where tasks are divided by DBMS types or services, our team allows everyone to choose tasks across different DBMS freely. Team members can participate in each other's tasks at any time, fostering collaborative work.Key ResponsibilitiesEstimate DBMS capacity and prepare DBMS servers, including modeling and query tuning.Conduct backup and recovery activities to prevent data loss in DBMS.Monitor server issues and troubleshoot for optimal DBMS operations.Learn and research to introduce new DBMS and related technologies that meet business requirements.Develop software for automating and monitoring DBMS server operations.Desired QualificationsMinimum of 3 years of experience in RDBMS operations (at least 3 years in MySQL, MongoDB, PostgreSQL).Understanding of the operating principles of transactional RDBMS (Redo & Undo logs and transaction processing).Knowledge of B-Tree, R-Tree, and Vector indexes in DBMS and execution plans.A strong sense of responsibility for assigned tasks and a positive attitude towards challenges with new technologies.A passion for DBMS technology analysis and discussion.Preferred QualificationsExperience operating Aurora RDS in AWS environment.Experience in developing DBMS management tools (Python, Java, Go, etc.).Familiarity with Docker & Kubernetes.Additional InformationFor full-time positions, there is a 3-month probation period.In accordance with the 'Act on the Promotion of Employment for the Disabled' and the 'Act on the Favorable Treatment and Support of Veterans', candidates who are disabled or veterans will be given preference during the hiring process.Application Process1. Document screening → 2. Job interview (quiz) → 3. Culture fit interview and reference check → 4. Salary negotiation → 5. Final acceptanceGo to the daangn application journey guide ()

Welcome to Your Journey with Daangn TeamAt Daangn, we are dedicated to creating an environment where individuals can grow alongside the company as it expands.Our recruitment team is here to support you in experiencing those moments of joy and collaboration with wonderful colleagues. Introducing the Merchant Communication TeamDaangn envisions a local lifestyle platform and is developing various services to create new value in neighborhood markets. The Merchant Communication Team is responsible for promoting the use of Daangn Business among small business owners. We are looking for someone to design content aimed at business owners, helping them understand how to better utilize Daangn Business and ultimately drive their growth. If you’re curious about Daangn Business, check out the links below: Daangn Business Owner's Lounge (App Exclusive)Key ResponsibilitiesYou will be responsible for visually designing the content and usage instructions of Daangn Business services to enhance user understanding (for business owners).Design promotional and educational content directed at business owners.Create and manage B2B marketing materials and offline event outputs.Produce various forms of content for publication on owned media such as the Daangn app's Owner's Lounge and Daangn Business website.Ideal Candidate2+ years of experience in content design.Proficient in creating images using Figma, Adobe Photoshop, and Illustrator.Preferred QualificationsAble to skillfully edit multilayered information into high-quality content.Enjoys engaging with clients through design and eliciting their responses.Experience collaborating on mobile-based product design projects.Additional InformationThis position starts with a 3-month contract, with a possibility of extension to 9 months based on performance.Preference is given to individuals with disabilities and veterans in the hiring process, in accordance with the laws on promoting employment for persons with disabilities and supporting veterans.Please submit your portfolio in PDF format, indicating your contributions and roles in collaborative projects.You may submit school assignments and personal projects that showcase your strengths and necessary skills for a content designer. Application Process1. Document screening → 2. Job interview (with pre-assignment) → 3. Final acceptanceAccess the Daangn Joining Journey Guide

Welcome to Your Journey with Daangn Team!At Daangn, we strive to create an environment where individuals can grow alongside the company. Our hiring team is here to assist you in achieving those joyful moments with wonderful colleagues. Introducing the Commerce TeamThe Commerce Team is dedicated to creating a new shopping experience within Daangn. We aim to redefine local commerce in our unique way, moving beyond just an online shopping mall. Our platform connects seamlessly with various Daangn services such as second-hand trading, community engagement, and local maps, allowing our 20 million users to enjoy shopping in a familiar environment.Our commerce platform embodies Daangn's DNA of community engagement, fostering group purchases with neighbors and offering exclusive local merchandise that provides new values not found in traditional e-commerce. We envision a commerce experience that makes shopping special through neighborly connections.The Commerce Team operates like an early-stage startup. Everyone acts as a project manager and researcher, obsessively focusing on customer problems. We encourage cross-functional collaboration, where anyone can propose ideas, experiment, and learn from outcomes. Quick execution and a learning attitude from failures are essential to us.Your RoleCurrently, we are focused on solidifying the fundamental functions of commerce such as product management, payment, delivery, and exhibitions. However, we plan to gradually introduce innovative commerce features infused with Daangn's unique character. Your ideas and execution will play a crucial role in shaping the direction of our services.Create an Engaging Commerce User ExperienceDesign and implement intuitive interfaces from product exploration to purchase completion.Ensure a consistent shopping experience across web views and websites while rapidly deploying event/exhibition pages.Experiment and Learn QuicklyQuickly implement and test various experimental features that go beyond traditional commerce functionalities.Regularly conduct A/B testing and continuously improve user experience based on data.Develop Efficient Management Tools for SellersBuild seller pages for product registration, order/inventory management, and settlements.Provide dashboards that visualize sales performance at a glance through data visualization.Maximize Development Speed with AIRapidly implement UI components and prototypes using tools like Claude Code and Cursor.Automate repetitive tasks with AI, investing saved time into user experience innovations.Ideal Candidate Profile4+ years of experience in frontend development.Obsessive about solving customer problems and committed to seeing projects through to completion.Quickly adapt to new tech stacks and balance rapid execution with scalability considerations.Collaborate openly with diverse teams and maintain a learning attitude from failures.Make autonomous engineering judgments and executions even before business decisions.Actively utilize AI tools (e.g., Claude Code, Cursor) to enhance productivity and focus on business impact.Preferred QualificationsExperience with TypeScript and React.Understanding and experience in the e-commerce domain.Handled complex state management (e.g., Recoil, Zustand).Familiarity with GraphQL architecture and experience using Relay.Understanding of execution environments (e.g., web browsers, in-app web views) and their policies.Additional NotesThis is a full-time position with competitive compensation and benefits.