Junior Back End Engineer

Fraud Alert:Please be aware that there are fraudulent job postings that may appear legitimate on other platforms. To ensure your application is considered, apply exclusively through our official Sensor Tower website or through posts linked to the Sensor Tower company profiles on platforms like LinkedIn, Indeed, BuiltIn, or Hackajob. At no time will Sensor Tower request any payment, credit card, or bank account information to complete your job application. All communication from Sensor Tower will be via email addresses ending in sensortower.com. Interviews will be conducted via phone or Zoom, and we will not switch to alternative email or text messaging. If you encounter any issues, please reach out to us directly. Include your resume when applying.To Recruitment Agencies:Sensor Tower does not accept unsolicited third-party resumes. Please refrain from sending resumes to our job alias, Sensor Tower employees, or any other locations. We will not be responsible for any fees associated with unsolicited resumes, and we will not pay any third-party agency or company without a signed agreement.About the Role:Are you passionate about developing products that handle large-scale real-world data?At Sensor Tower, we process vast amounts of data to provide insights utilized by thousands of customers. We are in search of inquisitive, driven early-career engineers eager to enhance their skills while assisting us in creating swift, reliable systems that simplify data accessibility and comprehension.You will collaborate closely with seasoned engineers, contribute meaningfully from your first day, and gain insights into the design, construction, and optimization of large-scale systems in a production environment.If you thrive on learning, tackling challenges, and delivering software that users depend on, we would love to connect with you. We have a strong history of rapidly advancing talented juniors, and this role presents a unique opportunity to work closely with senior leadership.Our Engineering Culture:We uphold the belief that "Simplicity is a prerequisite for reliability." We seek engineers who resonate with our core values:- Simplicity: We prioritize straightforward solutions over complex ones and avoid unnecessary complications.- Quality: We produce code that is enjoyable to read, understanding that code is often read more frequently than it is written. We strive for high standards and avoid cutting corners.

Fraud Alert: We advise applicants to only submit applications through the official Sensor Tower website or designated job postings on trustworthy platforms like LinkedIn, Indeed, BuiltIn, or Hackajob. Sensor Tower will never request payment, credit card, or bank account details during the job application process. All communications will originate from email addresses ending with sensortower.com. Interviews will be conducted via phone or Zoom, and we will not use alternative email addresses or text messaging for communication. Please report any suspicious activity that does not align with these guidelines. Kindly include your resume when applying.Attention Recruitment Agencies: Sensor Tower does not accept unsolicited resumes. Please refrain from sending resumes to our job alias, employees, or any other location. Sensor Tower will not be liable for any fees associated with unsolicited submissions.About the Role:As a Back End Engineer at Sensor Tower, you will play a crucial role in scaling our database operations while managing extensive data volumes (in the tens of terabytes). We seek engineers who can creatively gather and analyze meaningful data insights.In our flat organizational structure, your contributions will significantly influence the development of products and features that support our users effectively.A Day in the Life:Interviewee: Engineering Team Lead - Sasha YelkovenkaWhat does your daily routine involve as a Software Engineer?I handle vast amounts of data, which continues to grow. My main responsibility is ensuring our customers can access this data swiftly and providing them with user-friendly tools for data consumption. I appreciate the ownership culture we have regarding our work and products.How do you collaborate with your team as a remote employee?At Sensor Tower, we foster a strong sense of community within our distributed team. We frequently collaborate over Zoom to combine our expertise and achieve outstanding results.

Join Moss, where we empower finance professionals to automate their daily tasks and make innovative decisions.Our culture is what sets us apart — we prioritize impact and continuous growth, encouraging each team member to learn and excel. Moss has been recognized by Sifted’s Rising 100 and LinkedIn's Top Startups, and we are committed to driving your career forward while building a lasting success story together.We are currently seeking a Senior Frontend Engineer (f/m/d) to join one of our diverse tribes in Warsaw. The tribes currently hiring include:Financial ServicesGrowthSpend ManagementYou will work closely with product, design, and backend engineers to provide seamless and scalable solutions.

Join Our Team as a Senior Machine Learning Engineer (Computer Vision)At Scandit, we empower people with technology that enhances their capabilities. From expediting deliveries for drivers to ensuring patients receive the correct medications, our innovative solutions streamline operations and provide valuable insights across various industries. We invite you to be part of our journey as we continue to grow, innovate, and elevate Scandit to new heights.Role OverviewWe are seeking a talented Senior Machine Learning Engineer to join our Label Capture team. In this role, you will focus on developing digital twins for complex labels and identification documents. You will enhance our existing product by integrating new functionalities and optimizing current features. Your work will involve applying computer vision and deep learning techniques to advance the extraction of information from printed documents beyond the current state of the art.If you find these challenges appealing, we would love to meet you!Key ResponsibilitiesLead the development of semantic document parsing solutions tailored to customer scenarios.Engage in all stages of quality improvement, including metrics definition, prototyping, testing, model integration, new model creation, data collection, analysis, and debugging.Stay informed on the latest advancements in document classification, text recognition, and information extraction.Define strategic directions and identify opportunities to enhance recognition capabilities.Mentor team members on best practices in code quality and engineering.Who You AreYou are an experienced ML engineer passionate about building, deploying, and refining machine learning systems. With a solid track record of delivering high-performance computer vision solutions both on-device and in the cloud, you have firsthand experience in guiding projects from prototype to production.You understand that software development blends technology with human interaction, and you are comfortable working independently or collaboratively. While you keep abreast of cutting-edge developments in CV/ML, you appreciate proven technologies and incremental improvements. You are innovative and committed to addressing real-world issues through creative solutions, taking ownership, and effectively navigating challenges. Attention to detail is your strength, yet you are also adept at finding pragmatic shortcuts to achieve goals.We are particularly excited to connect with you if you meet the following criteria:Over 5 years of industry experience in tackling recognition challenges, with a successful history of launching products.

Join Bolt as a strategic and analytical Product Manager focused on enhancing our User Authentication domain—the crucial first step in our users' journeys.In this pivotal role, you will engage collaboratively with engineering, design, data, security, fraud prevention, compliance, and product teams across various sectors to craft authentication experiences that are swift, intuitive, secure, and reliable on a global scale.As a member of our core Platform team, you will play a key role in transforming Bolt’s authentication into a world-class experience, ensuring that identity access remains seamless, flexible, and consistent across every market we operate in.If you are passionate about improving access for millions of users every day, we invite you to connect with us!

CD Projekt Red is seeking a Senior User Experience Researcher in Warsaw. This position centers on improving the quality of gaming experiences by gathering insights that inform design decisions. The team values both creativity and collaboration, aiming to deliver engaging stories and immersive environments to players. Role overview The Senior User Experience Researcher will focus on understanding player behaviors and preferences. Insights from research will help guide the development of new features and refine existing gameplay elements. Collaboration This role works closely with designers, writers, and other team members to ensure that each project meets the studio’s standards for narrative depth and world-building. Impact Your work will contribute directly to the studio’s goal of creating memorable and captivating gaming experiences for a global audience.

Join Fresha, a leading platform in the beauty and wellness industry, as a Senior IT Operations Engineer. In this pivotal role, you will oversee and enhance our IT operational processes, ensuring optimal performance and reliability for our B2B services. Collaborating with cross-functional teams, you will implement innovative solutions that drive efficiency and improve service delivery.

TENTENS Tech is a partner IT company of SKELAR, a Ukrainian venture builder focused on creating international tech businesses.We develop social discovery platforms for over 20 million users worldwide. Our pace and scale are driven by deep expertise in analytics, high-load systems, and performance marketing.Today, the TENTENS Tech team comprises over 250 individuals, each acting like a CEO in their role and contributing to the collective success. We operate in a 10/10ths style: staying focused on our goals, asking the right questions along the way, and never settling for 'good' — only maximum results and then some. If this resonates with you and you're eager to accelerate with us, let’s connect!We are currently seeking a User Acquisition Manager to elevate our results together.Key challenges in this role include:— Launching, scaling, and optimizing advertising campaigns (Google/Social/Native/R&D);— Diving into numbers and metrics (CTR, CR, CPA, ROAS, LTV) and transforming data into actionable insights;— Continuously experimenting with new approaches, channels, and formats;— Collaborating in creative brainstorming sessions with designers, marketing leaders, and product teams — your ideas will be valued and implemented;— Analyzing competitors: their campaigns, messaging, creatives, and funnel structures — using these insights to stay ahead.What matters to us:— You have 2+ years of experience in performance marketing, analytics, or related fields;— You are proficient with numbers, analytics, and dashboards;— You quickly grasp new information, adapt to changes, and are not afraid to think outside the box;— You are detail-oriented, reliable, and always double-check your work;— You have an intrinsic drive for initiative: you propose, test, analyze, and push processes forward;— You possess English proficiency at a B2+ level — allowing you to work comfortably with foreign markets and materials.Preferred qualifications:— Familiarity with key marketing metrics (CPM, CPC, CTR, ROAS, etc.) and understanding their impact on the company’s P&L;— Practical experience in launching campaigns on Google/Meta or other performance channels;— Proficient in Excel / Google Sheets — for swift analysis, A/B testing, and budget planning.— Experience in Big 4 / Big 3 is a plus.What you will gain with us:— Internal clubs based on interests...

TENTENS Tech is a dynamic IT partner of SKELAR, a Ukrainian venture builder focused on creating international tech businesses.We specialize in developing social discovery platforms that cater to over 20 million users globally. Our rapid growth and scalability stem from our profound expertise in analytics, high-load systems, and performance marketing.Currently, our team at TENTENS Tech comprises over 250 talented individuals, each acting as a CEO in their respective roles, contributing to our collective success. We embrace a 10/10ths work style: we keep our eyes on the target, ask the right questions along the way, and never settle for 'good enough' — only the best and then some. If you resonate with this description and are eager to accelerate with us, let's connect!We are looking for a User Acquisition Manager to elevate our performance standards together.Key Responsibilities:— Launch, scale, and optimize advertising campaigns (Google) with a focus on results rather than just costs;— Dive deep into metrics and data — CTR, CR, CPA, ROAS, LTV — and transform insights into actionable strategies;— Continually experiment with new approaches, channels, and formats — we are always on the hunt for that 'one' idea that scales;— Participate in creative brainstorming sessions with designers, marketing leaders, and product teams — your ideas will never go unheard;— Analyze competitors: their campaigns, messaging, creatives, and funnel structures — using these insights to stay one step ahead.What We Value:— You have over 1 year of experience in performance marketing, analytics, or related fields (experience with Big 4/Big 3 is a plus);— You are adept at working with numbers, analytics, and dashboards — understanding that metrics are not just reports, but maps to growth;— You grasp new information quickly, adapt to changes seamlessly, and are unafraid to think outside the box;— You are detail-oriented, reliable, and always double-check your work;— You possess an internal drive for initiative: you propose, test, analyze, and propel processes forward;— You have a B2+ proficiency in English to comfortably engage with international markets and materials.Preferred Qualifications:— Knowledge of key marketing metrics (CPM, CPC, CTR, ROAS, etc.) and an understanding of how each impacts the company's P&L;— Practical experience in launching campaigns on Google/Meta or other performance channels;— Proficient in Excel/Google Sheets — for quick analysis, A/B testing, and budget planning.What You Will Gain with Us:— Access to internal clubs focused on professional development: marketing, development, finance, recruiting;— Training sessions, courses, attendance at conferences, and a wealth of knowledge-sharing opportunities.

Hello! We are Liven, creating a global ecosystem of self-regulation products that empower individuals to turn off their emotional autopilot and foster better relationships with themselves.Within our ecosystem:Self-discovery Companion - An app chosen by over 2.5 million users, offering a space for self-exploration through AI coaching, mood trackers, audio practices, and bite-sized learning.Online Coaching - Sessions with certified experts to tackle complex situations.Supplements - Aiding physical recovery and bodily support.We are on a constant expedition with ambitious plans to expand our ecosystem.Liven is a company for the curious. We are driven by curiosity - an intrinsic need to ask questions, dig deeper, and confront the unknown.We are passionate about creating products and solutions that genuinely help. All our curiosity and experimental culture exist to discover better ways to support and guide individuals on their self-discovery journey.Currently, we are seeking a User Acquisition Manager (Google) at Liven.Challenges Awaiting You:Creation, launch, and optimization of advertising campaigns on Google Ads;Testing new channels and technologies;Analysis of key metrics across all channels: LTV, CAC, ROMI/ROAS, ROI/ROR, etc.;Conducting A/B testing of various funnels and strategies;Collaborating on the development of marketing strategies with the team.

Join Lesaffre as a SAP Regional Super Key User for Finance at our Warsaw office. In this pivotal role, you will act as a liaison between the finance department and SAP solutions, ensuring seamless integration and optimization of our financial processes. Your expertise will be vital in enhancing system functionalities and addressing user needs.

Location: [Poland] About Us: RTB House is a pioneering performance demand-side platform (DSP) that leverages advanced Deep Learning AI algorithms to empower brands and drive growth. As a leader in the industry, we excel in optimizing performance throughout the entire purchase funnel. Established in 2012 and currently operating in over 90 markets, RTB House is committed to privacy and innovation, employing first-party advertising strategies. Our comprehensive, Deep Learning-driven AdTech solutions are designed to enhance conversion rates, acquire new customers, foster engagement, and sustain long-term demand for our global clientele. Position Overview As a Senior Cloud Operations Engineer, you will play a vital role in supporting our internal teams by overseeing daily operations and providing expert technical guidance within our Google Cloud Platform (GCP) environments. Your responsibilities will include assisting users from IT, engineering, and business teams by advising on project configurations, enabling integrations, supporting CI/CD workflows, and ensuring adherence to best practices in security, networking, and governance. This position offers an exciting opportunity for an engineering professional who enjoys hands-on technical work, tackling practical operational challenges, and empowering teams to effectively utilize cloud services. Key Skills Required: Extensive knowledge of core Cloud concepts, including IAM, networking, VPC Service Controls, project and service configurations, and integrations. Proven ability to guide users through setup, troubleshooting, and best practices. Experience in assisting teams with CI/CD pipeline management, including configuration, troubleshooting, and optimization, along with automating repetitive operational tasks to enhance efficiency and reliability. Strong ownership of operational tasks, adept at diagnosing and resolving issues across cloud services, delivering clear and actionable solutions in situations where requirements may be incomplete or ambiguous. Exceptional communication and collaboration skills to support internal users from diverse backgrounds, work closely with engineering, security, and platform teams, and maintain comprehensive documentation.

TENTENS Tech is a partner IT company of SKELAR, a Ukrainian venture builder focused on creating international tech businesses.We develop social discovery platforms catering to over 20 million users worldwide. Our pace and scale are powered by deep expertise in analytics, high-load systems, and performance marketing.At TENTENS Tech, our team comprises over 250 professionals, each acting as a CEO in their respective roles and contributing to our collective success. We operate under the principle of 10/10ths: aiming for the target, asking the right questions along the way, and striving for nothing less than excellence. If you resonate with this ethos and are ready to accelerate with us, let’s connect!Currently, we are looking for a Senior/Lead User Acquisition Manager.Your Challenges Include:— Directly impacting growth processes in your area and the opportunity to launch new channels.— Mentoring other User Acquisition Managers and potentially leading the team in the future.— Launching and scaling campaigns on platforms such as TikTok, Snapchat, X (formerly Twitter), Quora, etc.— Implementing growth hacking strategies and identifying opportunities for rapid growth beyond traditional promotional schemes.— Evaluating campaign performance metrics, monitoring key marketing indicators (CTR, CR, CPA, ROI, etc.), and adjusting strategies based on data insights.— Conducting competitor research and analyzing their advertising channels and user acquisition approaches.— Collaborating with the creative team to develop high-converting advertising creatives, setting tasks for the creative team, participating in brainstorming sessions, and assessing designer outputs.— Working with the product and technical team to create effective conversion funnels and enhance user flow.What We Value:— 4+ years of experience in marketing;— Hands-on experience in developing and executing advertising campaigns on Facebook and Google Ads;— Strong understanding of marketing metrics such as CPM, CTR, CPC, CR, CPA, ROAS, ROI, LTV, and their relationships with the company’s financial outcomes;— Data-driven decision-making approach with strong analytical skills, capable of analyzing large volumes of information and drawing insights;Preferred Qualifications:— 2+ years of experience in managerial positions;— Experience with TikTok Ads;What You Will Gain with Us:— Internal clubs focusing on professional development in marketing, development, finance, and recruitment;— Training programs, courses, and conference attendance;— Spacious and modern offices in Kyiv and Warsaw;— Medical insurance, a friendly team, and much more!

TENTENS Tech is a dynamic IT partner of SKELAR, a Ukrainian venture builder focused on creating international tech businesses. We specialize in developing social discovery platforms for over 20 million users worldwide.Our growth is driven by deep expertise in analytics, high-load systems, and performance marketing. The TENTENS Tech team currently consists of more than 250 talented individuals, each acting as a CEO in their role and significantly impacting our collective success. We operate with a 10/10ths approach: we stay focused on our goals, ask the right questions, and never settle for 'good enough'—only excellence and a bit more.We are looking for a passionate Marketing Lead (User Acquisition) to join our team.As a Marketing Lead, you will face exciting challenges including:- Directly influencing growth processes and the ability to launch new channels.- Mentoring other User Acquisition Managers with the potential to lead a team in the future.- Launching and scaling campaigns on platforms such as TikTok, Snapchat, X (formerly Twitter), Quora, etc.- Implementing growth hacking strategies and seeking opportunities for rapid growth outside of traditional marketing schemes.- Evaluating campaign effectiveness by monitoring key marketing metrics and adjusting strategies based on data insights.- Conducting competitor research and analyzing their marketing channels, materials, and user acquisition approaches.- Collaborating with the creative team to produce high-converting ad creatives, setting tasks for designers, and participating in brainstorming sessions.- Working with the product and tech teams to design effective conversion funnels and enhancing user flows.What matters to us:- 4+ years of marketing experience;- Hands-on experience in creating and executing advertising campaigns on Facebook and Google Ads;- Understanding of marketing metrics and their relationship with company financial outcomes;- Data-driven decision-making skills with strong analytical abilities to interpret large volumes of information.Bonus points for:- 2+ years of managerial experience;- Experience with TikTok Ads.What you will gain by joining us:- Access to internal clubs focused on professional areas such as marketing, development, finance, and recruitment;- Opportunities for training, courses, and conference attendance;- Spacious and modern offices in Kyiv and Warsaw;- Medical insurance and a corporate doctor.Join us in building the next big thing!

Join Squarepoint Capital as a Quantitative Developer specializing in High Performance Computing with expertise in Python. In this pivotal role, you will contribute to the development and optimization of advanced quantitative models, leveraging your technical skills to enhance performance in a fast-paced environment. Your work will directly influence trading strategies and investment decisions, making a significant impact on the firm's success.

Join 42dot as an Operating System Tool Software Engineer in Warsaw, Poland. We are looking for talented engineers to help us develop state-of-the-art software tools that enhance operating system functionalities. The ideal candidate will have a passion for technology and a keen eye for detail.

ABOUT BOXBox (NYSE:BOX) stands at the forefront of Intelligent Content Management, empowering organizations to enhance collaboration, oversee the entire content lifecycle, safeguard critical assets, and revolutionize business processes with cutting-edge enterprise AI technology. Since our inception in 2005, we've simplified workflows for numerous prominent global companies, including JLL, Morgan Stanley, and Nationwide. Our headquarters is situated in Redwood City, CA, with additional offices spanning the United States, Europe, and Asia.By joining Box, you will play a pivotal role in advancing our platform. Content is at the heart of every organization—encompassing contracts, invoices, employee records, financial documents, product specifications, marketing materials, and more. Our mission is to infuse intelligence into content management, empowering our clientele to reshape workflows across their enterprises. With the synergy of AI and enterprise content, we offer unprecedented opportunities to redefine global collaboration, and at Box, you will be at the leading edge of this transformation. WHY WE NEED YOUBox's IT End User Services team is dedicated to delivering exceptional technical support to our global workforce. We provide essential services, including desktop and audio-visual support, onboarding for new hires, advanced application configuration, and event support. Our vision is to cultivate end-user solutions and experiences that unlock the full potential of every employee. We value passion for outstanding service, commitment to personal growth, and fostering a positive team environment.As a Senior IT Support Engineer, you will collaborate with a worldwide team of elite IT professionals. Your responsibilities will include managing and resolving a diverse range of mobile, desktop, audio/video, network, and telecommunications challenges, ensuring that our employees maintain peak productivity. You must be adaptable to the rapid pace of our growing business while being methodical in addressing complex issues and processes. In this role, you will also coach and mentor peers, spearhead cross-functional projects, and influence end-user technology strategies that will resonate with Box employees globally.

TENTENS Tech is a dynamic IT partner of SKELAR, a Ukrainian venture builder dedicated to developing international tech businesses.We specialize in creating social discovery platforms that serve over 20 million users globally. Our growth and scale are driven by deep expertise in analytics, high-load systems, and performance marketing.Our TENTENS Tech team consists of over 250 individuals, each acting as a CEO in their role, contributing to our collective success. We operate with a 10/10ths approach: staying focused on our goals, asking the right questions along the way, and never settling for 'good enough' — we strive for excellence and beyond. If this resonates with you and you're eager to accelerate with us, let's connect!We are currently seeking a Senior/Lead User Acquisition Manager.Key Challenges Awaiting You:- Directly influence growth processes in your area and launch new channels.- Mentor other User Acquisition Managers and potentially lead a team in the future.- Launch and scale campaigns on platforms such as TikTok, Snapchat, X (formerly Twitter), and Quora.- Implement growth hacking strategies and identify opportunities for rapid growth, moving beyond traditional marketing schemes.- Evaluate campaign effectiveness, monitoring key marketing metrics (CTR, CR, CPA, ROI, etc.) and adjusting strategies based on data insights.- Conduct competitive research, analyzing their advertising channels, materials, and user acquisition approaches.- Collaborate with our creative team to develop high-converting ad creatives, setting tasks, participating in brainstorming sessions, and assessing design outcomes.- Work alongside the product and tech teams to create exceptional conversion funnels, enhancing user flow.What We Value:- 4+ years of marketing experience.- Hands-on experience in developing and executing advertising campaigns on Facebook and Google Ads.- Solid understanding of marketing metrics such as CPM, CTR, CPC, CR, CPA, ROAS, ROI, and LTV, and their relationships with company financial results.- Data-driven decision-making approach with strong analytical skills, capable of analyzing large volumes of information and deriving insights.Preferred Qualifications:- 2+ years of managerial experience.- Experience with TikTok Ads.What You Will Gain With Us:- Access to internal clubs focused on professional development in marketing, development, finance, and recruitment.- Training, courses, and opportunities to attend conferences.- Spacious, modern offices in Kyiv and Warsaw.- Medical insurance, corporate benefits, and more.

ABOUT BOXBox, listed on the NYSE as BOX, stands at the forefront of Intelligent Content Management. Our innovative platform empowers organizations to enhance collaboration, manage the entire content lifecycle, safeguard essential content, and revolutionize business workflows through the integration of enterprise AI. Established in 2005, Box simplifies organizational operations for renowned global entities such as JLL, Morgan Stanley, and Nationwide. Our headquarters are located in Redwood City, CA, with offices throughout the United States, Europe, and Asia.Joining Box means becoming part of a mission to propel our platform into the future. As content drives how we operate daily—encompassing contracts, invoices, employee records, financial data, product specifications, marketing materials, and beyond—our goal is to infuse intelligence into content management, enabling our clients to entirely transform their workflows. With the fusion of AI and enterprise content, we are positioned to redefine how the world collaborates, and at Box, you will play a crucial role in this transformative journey.YOUR ROLE AT BOXThe Engineering Business Operations Manager will serve as a pivotal ally within the Engineering Business Operations and Strategy (EBOS) team, providing essential operational support and expertise to Box Engineering teams within the Build organization. This position will concentrate on our teams in the EMEA region. Your responsibilities will include guiding and preparing teams for various planning and reporting processes—such as Annual Planning, Quarterly Planning, Quarterly Business Reviews, and monthly Operational Reviews—while driving key processes for performance metric tracking and assisting leadership in measuring and reporting on critical goals. We seek an individual who can facilitate our scaling efforts to support ongoing growth in this role, which reports directly to the Senior Director of EBOS.KEY RESPONSIBILITIESLead optimization initiatives and identify opportunities to enhance team operations; design and refine workflows to minimize friction and boost efficiency.Support and prepare Engineering teams across EMEA for all planning and reporting activities, including Annual and Quarterly Planning, Quarterly Business Reviews (QBRs), and monthly Operational Reviews.Drive and enhance...

Are you a skilled Operations Engineer with a passion for both Linux and Windows environments? At netcompany1, we are seeking an innovative professional to join our dynamic team in Warsaw. You will play a crucial role in maintaining and optimizing our operational systems while collaborating with cross-functional teams to enhance our infrastructure.