Backend Software Engineer - Advertising

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 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 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.

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 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.

Daangn offers an AI-Driven Data Analyst Internship in Seoul, providing the chance to gain experience with advanced technology and real-world data analysis. Interns will join ongoing AI projects and play a part in shaping how data is used throughout the company. Responsibilities Analyze datasets to support AI-focused projects Collaborate with experienced team members on current initiatives Use data analysis skills in practical, hands-on work Contribute to improving data practices at Daangn Location This internship takes place onsite in Seoul.

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 ()

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 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 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'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!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 DaangnAt Daangn, we strive to create an environment where individuals can grow alongside the company as it expands.The Daangn recruitment team is here to assist you in reaching those moments of joyful reflection with wonderful colleagues. Introducing the Finance TeamThe FP&A team at Daangn plays a pivotal role in translating our domestic and international business growth into numbers. From establishing budgets across the organization to performance analysis, long-term forecasting, and competitor research, we shape the direction of our business through numerical insights. We are looking for a colleague who can deeply understand our business and data, and provide valuable insights for company-wide decision-making in our rapidly growing company.Your ResponsibilitiesCreate management plans for Daangn Market and its subsidiaries, estimating both short-term and long-term profitability.Prepare monthly profitability reports for Daangn Market and its subsidiaries, meticulously analyzing trends and variances against targets.Conduct reviews of the overall budget and propel the enhancement of internal processes and systems related to budgeting and payments.Analyze key performance indicators to derive meaningful insights connected to revenue.Monitor the performance status and consensus forecasts of domestic and international industry peers.Who We're Looking ForA candidate with 5-7 years of experience in management control functions.A proactive individual with experience leading management accounting and planning efforts.Someone skilled in analyzing issues through numbers and data to derive insights.A strong communicator capable of flexible collaboration with relevant departments.Experience or interest in IT services is a plus.Bonus Points If You HaveExperience in accounting or related expertise.Experience in planning and enhancing internal systems related to management control, budgeting, and accounting.Additional InformationRegular employment includes a 3-month probation period.According to the Act on the Promotion of Employment for Persons with Disabilities and the Act on the Honorable Treatment and Support of Veterans, we prioritize applicants from these groups in our hiring process.Application Process1. Document screening → 2. Video interview → 3. Job interview (assignment) → 4. Culture fit interview and reference check → 5. Offer negotiation → 6. Final acceptance and onboardingAccess the Daangn Joining Journey Guide () Daangn Application ProcessDocument ScreeningDaangn accepts freely formatted applications.Please feel free to utilize various information that highlights your strengths while crafting your resume.Document formats can be freely chosen, excluding hwp (Hangul) files, with options such as Word, PDF, or web links.If submitting through web links (Notion, Google Drive, etc.), please ensure access permissions are granted.Please exclude personal information such as photos and addresses that are not relevant to the evaluation.Video InterviewThis stage involves a video conversation with a Daangn team member closely related to your applied position, discussing essential job knowledge.Assignment StageDepending on the role, there may be an assignment stage. The assignment will relate to job competencies and may be separately administered or included in the video or job interview.

# About the Team- The Data Mart Platform Team is dedicated to building a standardized Data Warehouse for various Toss products, aiming to prevent data silos and enhance overall data maturity across the organization.- Responsibilities include enhancing centralized DW quality management processes, standard monitoring, integrating product data with the enterprise data mart, designing efficient pipelines, and creating standardized marts.- **Interested in learning more about Toss's Data Organization?** [→ *Toss Data Division Wiki*](https://recruit-data-division.oopy.io/) # Responsibilities- After completing an onboarding process to familiarize yourself with Toss's DW standards, you will work as part of the Data Mart Platform Team.- Maintain and manage an agile and manageable enterprise DW standard, taking responsibility for DW quality management from an enterprise perspective in collaboration with DAEs (Domain Analytics Engineers) from various product domains (development and execution of standard management monitoring).- Plan and execute systems and processes to enhance data reliability, improving table consistency, advancing DQ rules, and establishing health check metrics.- Develop enterprise-level marts, managing the integration of standard marts from different domains and ensuring efficient data pipeline improvements.- Identify and execute tasks to enhance data discoverability across the organization.- Develop a platform to measure data maturity across various Toss domains and initiate projects to enhance the productivity of DAEs.- The data development environment is based on Hadoop, Airflow, Python, and SQL (Impala). # Desired Qualifications- Understanding of database normalization and the fundamental characteristics of Data Warehouses (Subject-Oriented, Integrated, Non-Volatile, Time-Variant).- Ability to clearly define key concepts as a DW data modeler and propose efficient data structures based on diverse data perspectives.- High-level understanding of DW standard management and the capability to propose and lead improvement initiatives at the enterprise level.- Strong comprehension of data governance aspects, including data quality and compliance, with the ability to suggest actionable plans.- Proficient in SQL, capable of writing efficient and readable queries.- Basic Python skills (enough to work with Airflow) are acceptable, but understanding modules and PySpark code written by others is preferred.- Experience with large-scale data processing and designing metrics from an AARRR perspective is a plus. # Application Tips- Please specify any relevant experience with DW construction projects and mart design, detailing your contributions.- Mention specific challenges you have addressed regarding data maturity.- Outline your contributions and lessons learned while solving data-related issues. # Joining Toss - Application Submission > Job Interview > Cultural Fit Interview > Reference Check > Compensation Discussion > Final Acceptance and Onboarding # A Note to Future Colleagues > "Our team strives for better service every day." - I was drawn to the thrilling risks associated with financial data and saw that my growth could contribute to the company's success, which is why I joined Toss. - The most stressful aspect of my previous company was being led by predetermined objectives, but Toss offers more autonomy than I expected, along with a dedicated and ambitious team focusing on "better service every day."

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

Join Our Data Platform Team!As a Data Engineer at Toss, you will be part of our Data Platform Team.The team consists of Data Engineers and Data Analytics Engineers.We are responsible for building platforms and data pipelines essential for analyzing the services provided by Toss.Your ResponsibilitiesDevelop and operate OLAP (Online Analytical Processing) based data pipelines.Design and optimize systems for reliable operation of large-scale data analysis and real-time/batch data pipelines.Develop and manage batch and streaming pipelines to load various types of data generated at Toss.Continuously improve data models and processing logic based on service requirements.We Are Looking For Candidates Who HaveExperience operating services in a Kubernetes (K8s) based environment.Experience in designing and operating data streaming pipelines using Kafka and Kafka Connect.Experience in processing large volumes of data using Apache Spark (Batch/Structured Streaming).Additional Skills That Would Be a PlusExperience in operating and tuning MPP/OLAP engines like StarRocks or ClickHouse.Experience in building Data Lakehouses using Open Table Formats such as Apache Iceberg, Hudi, or Delta Lake.Experience in real-time data processing using streaming frameworks like Kafka Streams or Apache Flink.Experience in designing and operating ETL pipelines based on Airflow.Your Journey to Join TossApplication Submission > Job Interview > Cultural Fit Interview > Reference Check > Compensation Negotiation > Final Offer

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.

Join the Daangn Team!At Daangn, we are committed to fostering an environment where individuals can grow alongside our company's success.We are here to assist you in reaching that moment where you can engage in meaningful discussions with amazing colleagues. About the Security TeamThe Security Team at Daangn is dedicated to ensuring the safe provision of our services. We defend against external attacks and prevent the leakage of valuable internal information. All our activities comply with various information security laws and regulations. We strive to understand Daangn's business model and provide clear criteria that are technically applied where appropriate. Through these efforts, we aim to create a trustworthy service for our users.Key ResponsibilitiesAnalyze and respond to security events in both customer service and internal office environments.Design, operate, and enhance detection systems and related activities for effective detection of security incidents and issues.Conduct investigations when security events occur to analyze breach paths and causes, and establish and implement measures to prevent recurrence.Continuously improve detection rules, automation, and operational processes based on insights gained during incident response.Who We Are Looking ForIndividuals with over 3 years of practical experience in responding to security incidents or events.Experience in analyzing security events and responding to incidents in complex service environments, including multi-cloud and SaaS.Proactive individuals who can lead incident response and operational improvements beyond the immediate scope of duties.Team players who can collaborate with various stakeholders to drive incident response and improvements.Preferred QualificationsContinuous interest in external security incidents and issues, with experience integrating CVEs and security trend reports into workflows.Experience utilizing OSINT, CTI, and Attack Surface information.Experience in improving analysis and response tasks through automation and AI for enhanced efficiency.Background in incident response within IT companies or large-scale service environments.Experience in building and operating SIEM or orchestration platforms.