Senior Software Engineer (Java&Scala)

🏢 Summary: Backend Software Engineer role focused on building and scaling a high-traffic mobile advertising exchange that processes hundreds of thousands of real-time auction requests per second. The position involves full lifecycle development of distributed, low-latency microservices written in functional Scala and deployed to production. Engineers design, implement, test, and optimize backend systems for high availability and performance. 🗂️ Requirements: BS in Computer Science or related field, 6+ years of software engineering experience, 2+ years of Scala programming experience, Experience with Java or Python, Hands-on experience with microservices architecture, Experience building high-traffic, high-availability systems, Experience with Agile development, Ability to design, implement and test backend systems, Experience troubleshooting application and infrastructure issues, Experience writing unit tests 📃 Skills: Scala, Java, Python, Microservices, MongoDB, Bigtable, Aerospike, Kafka, PubSub, AWS, GCP, Git, Bitbucket, ProtocolBuffers, NoSQL 🏢 Description: LoopMe is the leading in-app monetization and programmatic advertising platform. We reach a mobile audience of over 900 million monthly unique users globally and process over 200 billion ad requests. The Chartboost SDK is the highest-integrated independent mobile ad SDK and through the Chartboost Exchange, Ad Network and other services, we empower mobile app developers to build businesses while connecting advertisers to highly engaged audiences. What we need: We are looking for a backend software engineer to join our exchange team and help us build the best advertising platform for mobile developers. You'll work on a system that processes hundreds of thousands of requests per second and conducts a real-time auction to find and deliver the most effective ads from our global partners. We trust our engineers to own this critical system and handle the full life cycle of feature development, from initial design all the way to shipping into production. Our system is written in functional Scala and has plenty of opportunities to flex your distributed, low-latency programming muscle, using technologies like mongoDB, protocol buffers and others. What you’ll be doing: Responsible for designing, implementing and testing the functionality of our Exchange product Work effectively with other engineers, system architects, and Operations teams to implement enhancements and issue resolutions Participate in technical discussions; come up with innovative ways to improve the product and process Troubleshoot issues with application, technologies, and infrastructure Continuously improve your technical knowledge Think creatively and work independently - collaborating with others as needed to maximize efficiency and throughput Deliver quality work on time while driving developer productivity across the organization You’re the type of engineer that appreciates clean code and has experience in writing unit tests to keep the utmost in code quality Qualifications: BS in Computer Science or related field 2+ years of Scala programming experience, along with experience in other programming languages such as java, or python. 6+ years of software engineering experience You have an understanding of microservices and hands-on experience implementing them You are experienced with software development in high-capacity, high-traffic, high-availability websites/systems You have experience working with Agile development The following experience would be a plus: Advertising technology experience Experience with Python or Java NoSQL databases (MongoDB, Bigtable, Aerospike etc) Distributed messaging services, like Kafka, PubSub Strong skills in Data Engineering Experience Managing Cloud infrastructure (AWS or GCP) Familiarity with Git and/or Bitbucket Benefits: International work environment Flexible working schedule with a hybrid working model (3 days from the office) Annual performance bonus (up to 8%) One month of workation (work from any location worldwide for one month) Multikafeteria

🏢 Summary: The offer is for a Java Backend Engineer to build and scale a high-load Data Management Platform processing billions of events daily in a real-time ad tech environment. The role focuses on developing and optimizing distributed data pipelines, microservices, and database schemas for performance and scalability. It involves working on complex backend systems supporting large-scale advertising auctions and audience targeting. 🗂️ Requirements: 2+ years of engineering experience, Proficiency in Java, Strong understanding of concurrency, Strong understanding of distributed systems, Experience with Spring Framework or similar IoC framework, Experience with JPA or other ORM framework, Strong knowledge of SQL, Experience with PostgreSQL or other modern RDBMS, Ability to work with large multi-module codebase 📃 Skills: Java, Spring, JPA, SQL, PostgreSQL, Spark, HBase, Kafka, Kubernetes, ORM, NoSQL 🏢 Description: We’re looking for a Java Backend Engineer to join LoopMe — a global AI-powered ad tech company redefining how brands connect with consumers across the open internet. In this role, you’ll help build and scale our Data Management Platform (DMP) — a massively distributed, high-throughput system processing billions of events daily , creating rich device and audience profiles, and exporting data segments to 50+ global partners and exchanges in real time. You’ll work on complex backend challenges around performance, scalability, data pipelines, and real-time processing , helping power the infrastructure behind large-scale advertising auctions and audience targeting. This is an opportunity to work on truly high-load systems , collaborate with experienced engineers, and have direct impact on a product used by some of the biggest players in the ad tech ecosystem. What you'll be doing: Developing features and optimizing performance for large-scale data pipelines (Spark jobs, HBase, Kafka) Designing and optimizing data schemas for relational and NoSQL databases Building microservice applications Core qualifications: 2+ years of engineering experience Proficiency in Java with a strong understanding of concurrency and distributed systems Experience with Spring Framework or similar IoC frameworks Experience with JPA or other ORM frameworks Strong knowledge of SQL and experience with modern RDBMS (PostgreSQL) Self-motivated, reliable, and comfortable working across a large multi-module codebase Additional experience we’d value: Experience with Apache Spark or other large-scale data processing frameworks Experience with HBase or other NoSQL/columnar stores Experience with Kubernetes Experience with Kafka Experience with AI/LLM integrations in backend services Benefits Flexible working schedule with a hybrid type of work Annual performance bonus One month of workation (you can work from any part of the world for one month) Multikafeteria

🏢 Summary: Senior Java Backend Engineer role focused on building and optimizing a high-load ad-serving system processing over 5 million requests per second with strict latency goals. The position involves designing critical-path components, implementing architectural improvements, and enhancing performance in a real-time bidding platform. The role emphasizes scalability, low-latency optimization, and distributed systems engineering in a microservices environment. 🗂️ Requirements: 5+ years backend engineering experience, Strong Java proficiency, Experience with Spring or Spring Boot, Hands-on SQL experience, Experience with PostgreSQL or other relational databases, Knowledge of microservices architecture, Proficiency with Linux shell, Experience with Docker 📃 Skills: Java, Spring, SpringBoot, SQL, PostgreSQL, Linux, Docker, gRPC, ProtocolBuffers, Reactor, WebFlux, Kafka, Kubernetes, JFR, async-profiler, JVM, Testcontainers, ClickHouse, Aerospike, Redis, Micrometer, Prometheus, Grafana 🏢 Description: Are you eager to work with advanced technologies and build high-performance applications capable of processing over 5 million requests per second? If yes, we have an ideal opportunity for you at LoopMe. We are a team of experienced engineers developing and supporting real-time bidding platforms for global advertisers. You will work daily with talented engineers, using technologies such as Java, Spring Boot, gRPC, Project Reactor, Kafka, ClickHouse, PostgreSQL, Aerospike, and Redis. Your main focus will be on enhancing performance, optimizing cloud infrastructure, and developing innovative features across our product range. Join us in our mission to expand the limits of possibilities in the advertising industry! We are seeking a Senior Java Backend Engineer to join our Marketplace team and help develop our high-load ad-serving system, which can process more than 5 million requests per second with a 200ms response time. What you’ll be doing Designing and tuning hot-path components for the ad-serving critical path—such as throttling, rate limiting, targeting indexes, and DSP adapters. Implementing architectural changes across services — including RTB request lifecycle, deals targeting, and multi-impression-key processing. Creating gRPC APIs and Protocol Buffers schemas to facilitate cross-team integrations. Profiling and minimizing CPU usage and allocations to achieve strict p99 latency goals. Strengthening the system architecture to guarantee smooth operation during peak load times. Integrating advanced targeting algorithms into the main ad delivery process. Collaborating closely with multiple teams to provide services and data for our solutions. Core qualifications Over five years of experience in backend engineering. Solid understanding of Java and Spring / Spring Boot. Hands-on experience with SQL and familiarity with PostgreSQL or other relational databases. Strong knowledge of microservices architecture and its best practices. Proficient in Linux shell and Docker. Additional experience we’d value Concurrency in Java includes java.util.concurrent, CompletableFuture, lock-free data structures, virtual threads / Project Loom, and Reactor schedulers. gRPC and Protocol Buffers Project Reactor / Spring WebFlux Kafka Kubernetes Experience in managing high-QPS services, including profiling with JFR and async-profiler, GC tuning, and JVM internals understanding. Robust testing culture with unit tests, functional tests, and Testcontainers. Extra pluses AdTech / RTB domain expertise — OpenRTB, DSP/SSP, IVT, deals, cookie-sync, ads.txt, schain Performance engineering on critical paths — utilizing fastutil / Eclipse Collections, creating allocation-aware code, and optimizing for JIT awareness. Distributed systems experience includes rate-limiting algorithms such as token bucket, fixed and slidingwindow, as well as back-pressure, circuit breakers, sharding, and consistent hashing. Observability tools include Micrometer, Prometheus, Grafana, and structured logging. Full responsibility for managing multi-week epics across multiple teams. Experience with analytical or in-memory databases such as ClickHouse, Aerospike, Redis. Benefits Flexible working schedule with a hybrid type of work Annual performance bonus One month of workation (you can work from any part of the world for one month) Multikafeteria

🏢 Summary: Role focused on manual and exploratory testing of Android and iOS SDKs within a high-scale adtech platform, ensuring quality from feature definition through release. The position involves defining test strategies, executing regression and smoke tests, validating multi-device builds, and collaborating closely with developers and automation engineers. It contributes directly to quality standards across a growing mobile SDK portfolio. 🗂️ Requirements: 2+ years in QA or mobile testing, Experience testing Android applications, Experience testing iOS applications, Proficiency with TestRail or similar test management system, Proficiency with JIRA for bug tracking, Understanding of API testing concepts, Experience in Agile/Scrum environments, Experience with network traffic analysis tools 📃 Skills: Android, iOS, TestRail, JIRA, API, Agile, Scrum, Charles, BrowserStack, Maestro, Rust, JavaScript 🏢 Description: About LoopMe LoopMe is an AI company solving one of advertising's hardest problems: making brand advertising actually measurable — and making it perform. Our platform runs patented machine learning models across billions of consumer signals in real time, optimising campaigns toward outcomes like purchase intent, brand lift, and foot traffic rather than proxy metrics like clicks. The result is 2–5x better performance than industry benchmarks, at scale. We operate a high-load programmatic infrastructure — processing millions of ad requests per second with sub-200ms response times globally. This isn't a layer on top of someone else's stack; it's built from the ground up, in-house, by the team you'd be joining. Founded in 2012 and headquartered in London, we now have 400+ people across 19 cities and have sustained 40% revenue CAGR since 2018. The engineering problems here are real, the ownership is genuine, and the scale is significant. The opportunity You'll own manual and exploratory testing across LoopMe's Android and iOS SDKs, playing a key role in quality decisions from feature definition through to release. Working closely with developers, automation engineers, and product managers, you'll define test strategies for new features and help shape how quality is approached as our SDK portfolio grows. This role sits within the Mobile SDK Quality team. What you'll do Design, write, and execute manual test plans and test cases for Android and iOS SDK releases and new feature work Own exploratory, regression, and smoke testing across nightly builds and release candidates Validate Adapter Certification builds across multiple OS versions and device configurations Log, triage, and track defects in JIRA with clear reproduction steps and supporting evidence Manage and maintain test cases in TestRail, keeping coverage current across all SDK projects Partner with the automation team to identify high-value candidates for automated test coverage Participate in sprint ceremonies and contribute to quality sign-off decisions Advocate for quality best practices and drive process improvements as the team scales What you'll bring Essential: 2+ years in a QA or mobile testing role Experience testing Android and iOS applications Proficiency with TestRail or a comparable test management system, and JIRA for bug tracking and sprint management Solid understanding of API testing concepts Experience working within Agile/Scrum teams, including use of Charles Proxy or a similar tool for network traffic analysis Nice to have: Familiarity with BrowserStack or a similar real-device cloud platform Experience with Maestro for mobile UI testing Knowledge of AI tools, including Claude Basic scripting ability in Rust or JavaScript Adtech or programmatic advertising domain knowledge What we offer Hybrid working — flexible schedule 1 month work-from-anywhere Annual performance bonus Multikafeteria (sport/culture card) LoopMe Gives Back Learning & development support

🏢 Summary: Role focused on owning and expanding automated test suites for Android and iOS SDKs within a high-scale mobile advertising platform. The position involves building mobile UI automation, integrating tests into CI/CD pipelines, and ensuring reliable test execution across real devices and environments. You will work closely with the Mobile SDK team to improve test coverage, stability, and deployment confidence. 🗂️ Requirements: 4+ years in automation engineering or 2+ years as SDET or developer, Strong JavaScript for test automation, Proficiency in Bash and Shell scripting, Experience with GitHub Actions for CI/CD, Experience with BrowserStack or similar real-device cloud platform, Proficiency with Maestro for mobile UI automation, Experience with Allure Reports, Experience with JIRA, Experience building automated test suites for Android and iOS 📃 Skills: JavaScript, Bash, Shell, GitHub, Actions, BrowserStack, Maestro, Allure, JIRA, Android, iOS, Firebase, Rust, TypeScript 🏢 Description: About LoopMe LoopMe is an AI company solving one of advertising's hardest problems: making brand advertising actually measurable — and making it perform. Our platform runs patented machine learning models across billions of consumer signals in real time, optimising campaigns toward outcomes like purchase intent, brand lift, and foot traffic rather than proxy metrics like clicks. The result is 2–5x better performance than industry benchmarks, at scale. We operate a high-load programmatic infrastructure — processing millions of ad requests per second with sub-200ms response times globally. This isn't a layer on top of someone else's stack; it's built from the ground up, in-house, by the team you'd be joining. Founded in 2012 and headquartered in London, we now have 400+ people across 19 cities and have sustained 40% revenue CAGR since 2018. The engineering problems here are real, the ownership is genuine, and the scale is significant. The opportunity You'll own test automation for LoopMe's Android and iOS SDKs, building and maintaining the suites that determine how fast and confidently we ship. Working alongside our existing automation engineer, you'll integrate deeply with the CI/CD pipeline using GitHub Actions, BrowserStack, and Maestro, and extend coverage as new SDK projects come into scope. This role sits within the Mobile SDK engineering team. What you'll do Build and maintain automated test suites for Android and iOS SDKs using JavaScript, Rust, and Bash/Shell scripting Develop mobile UI automation using Maestro across Android and iOS SDK projects Integrate automated tests into GitHub Actions CI/CD workflows for nightly smoke, regression, and Adapter Certification runs Own test execution and monitoring via BrowserStack App Automate, debugging environment-specific failures across devices and infrastructure Manage and publish test results through Allure Reports, surfacing findings to developers via JIRA and Slack Drive down nightly test run time by parallelising suites across multiple GitHub Actions runners Manage test builds via Firebase App Distribution for Android and iOS Leverage AI tools, including Claude, to accelerate test development and improve coverage and resilience What you'll bring Essential: 4+ years in automation engineering, or 2+ years as an SDET or developer Strong JavaScript skills applied to test automation Proficiency in Bash and Shell scripting, and GitHub Actions for CI/CD integration Experience with BrowserStack or a comparable real-device cloud platform Proficiency with Maestro for mobile UI automation, Allure Reports, and JIRA Nice to have: TypeScript familiarity TestRail or an equivalent test management system Charles Proxy for network traffic analysis Experience with AI-assisted test generation or self-healing frameworks Rust programming experience Adtech or programmatic advertising domain knowledge What we offer Hybrid working — flexible schedule 1 month of work-from-anywhere Annual performance bonus Multikafeteria (sport/culture card) LoopMe Gives Back Learning & development support

🏢 Summary: Senior Backend Engineer role to architect and build the core systems of a next-generation AdTech platform, focusing on high-throughput, low-latency services for campaign delivery, targeting, and attribution. The position involves defining system architecture from the ground up using Python, Django, Kubernetes, and AWS in a distributed, scalable environment. Engineers will drive technical direction, optimize performance, and provide leadership in a fast-paced, product-driven setting. 🗂️ Requirements: 5+ years of software development experience building scalable backend systems, Strong knowledge of algorithms, data structures, networking, and databases, Proven experience designing and scaling distributed systems, Experience with backend programming languages (e.g. Java, .NET, Python, Node.js), Ability to design high-throughput, low-latency systems, Experience with system architecture and technical decision-making, Availability to work until 1pm EST, Upper-intermediate English level 📃 Skills: Python, Django, Kubernetes, AWS, PostgreSQL, Java, .NET, Node.js, ETL, OpenRTB, Prebid.js, GoogleAdManager, AmazonUAM, DSP, SSP 🏢 Description: ID68432 AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards. Why join us If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you! :) About the role We are looking for a Senior Backend Engineer to architect and build the core systems of a next-generation AdTech platform that embeds products directly into visual experiences. You will design high-throughput, low-latency services for campaign delivery, targeting, attribution, and partner integrations using Python, Django, Kubernetes, and AWS. This is an early-stage initiative where senior engineers define the technical direction and system architecture from the ground up. What you will do Architect, build, and evolve core systems for the Ads platform; Design APIs and services supporting campaign management, targeting, delivery, attribution, and reporting; Build and optimize high-throughput, low-latency systems processing large volumes of events and data; Own critical systems end-to-end, including design, implementation, deployment, monitoring, and ongoing improvements; Drive architectural decisions and establish patterns that support scalability, reliability, and developer productivity; Collaborate closely with product, data, and partner teams to translate business requirements into robust technical solutions; Provide technical leadership through design reviews, system discussions, and mentoring other engineers; Contribute to engineering best practices, documentation, and long-term platform vision; Participate in hiring and help grow a strong, high-performing team. Must haves 5 years of software development experience building scalable systems using backend programming languages/frameworks (e.g. Java , .NET , Python , Node.js , etc); Deep understanding of computer science fundamentals, including algorithms, data structures, networking, and databases; Proven experience designing and scaling distributed systems with a focus on performance, observability, and fault tolerance; Strong architectural instincts and the ability to make high-leverage technical decisions that impact multiple teams and systems; Demonstrated ability to influence and mentor senior engineers, guide teams through ambiguity, and elevate engineering practices across the board; Exceptional ownership mindset; Availability to work till 1pm EST (till 8 pm Kyiv time) ; Excellent communication and cross-functional collaboration skills; Comfortable operating in a fast-paced, high-autonomy, product-driven environment; Experience with e-commerce and catalog management is preferred; Familiarity with Python , Django , Kubernetes , PostgreSQL , and AWS is strongly preferred, but deep expertise in analogous systems and a willingness to learn are welcome; Upper-intermediate English level. Nice to haves Strong experience with complex ETL flows and high-throughput systems is highly preferred; Experience with AdTech (This may include experience with DSPs, SSPs, ad exchanges, affiliate programs, Prebid.js, Prebid Server, Google Ad Manager, Amazon UAM/TAM, OpenRTB, identity and addressability solutions, as well as ad operations workflows.) The benefits of joining us Professional growth: Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps Competitive compensation: We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities A selection of exciting projects: Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands Flextime: Tailor your schedule for an optimal work-life balance, by having the options of working from home and going to the office – whatever makes you the happiest and most productive. Meet Our Recruitment Process Asynchronous stage – An automated, self-paced track that helps us move faster and give you quicker feedback: Short online form to confirm basic requirements 30–60 minute skills assessment via Codility – a platform founded in Poland that helps us provide quicker feedback and streamline this stage of the process. 5-minute introduction video Synchronous stage – Live interviews Technical interview with our engineering team (scheduled at your convenience) Final interview with your future teammates If it’s a match — you’ll get an offer!

🏢 Summary: Senior Backend Engineer role focused on architecting and building the core systems of a next-generation AdTech platform, designing high-throughput, low-latency services for campaign delivery, targeting, and attribution. The position involves defining system architecture from scratch, scaling distributed systems, and providing technical leadership in a fast-paced environment. Strong experience with scalable backend development and AdTech ecosystems is required. 🗂️ Requirements: 5+ years of experience building scalable backend systems, Experience in AdTech (DSPs, SSPs, ad exchanges, Prebid, Google Ad Manager, OpenRTB, etc.), Strong knowledge of algorithms, data structures, networking, and databases, Proven experience designing and scaling distributed systems, Experience with backend programming languages (Java, .NET, Python, Node.js), Ability to design high-throughput, low-latency systems, Upper-intermediate English level, Availability to work until 1pm EST, Experience mentoring engineers and driving architectural decisions 📃 Skills: Python, Django, Kubernetes, AWS, PostgreSQL, Java, .NET, Node.js, OpenRTB, Prebid.js, Prebid, GoogleAdManager, AmazonUAM, AmazonTAM, ETL 🏢 Description: ID52365 AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards. Why join us If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you! :) About the role We are looking for a Senior Backend Engineer to architect and build the core systems of a next-generation AdTech platform that embeds products directly into visual experiences. You will design high-throughput, low-latency services for campaign delivery, targeting, attribution, and partner integrations using Python, Django, Kubernetes, and AWS. This is an early-stage initiative where senior engineers define the technical direction and system architecture from the ground up. What you will do Architect, build, and evolve core systems for the Ads platform; Design APIs and services supporting campaign management, targeting, delivery, attribution, and reporting; Build and optimize high-throughput, low-latency systems processing large volumes of events and data; Own critical systems end-to-end, including design, implementation, deployment, monitoring, and ongoing improvements; Drive architectural decisions and establish patterns that support scalability, reliability, and developer productivity; Collaborate closely with product, data, and partner teams to translate business requirements into robust technical solutions; Provide technical leadership through design reviews, system discussions, and mentoring other engineers; Contribute to engineering best practices, documentation, and long-term platform vision; Participate in hiring and help grow a strong, high-performing team. Must haves 5 years of software development experience building scalable systems (backend programming languages/frameworks, e.g. Java , .NET , Python , Node.js etc); Experience with AdTech (This may include experience with DSPs, SSPs, ad exchanges, affiliate programs, Prebid.js, Prebid Server, Google Ad Manager, Amazon UAM/TAM, OpenRTB, identity and addressability solutions, as well as ad operations workflows); Deep understanding of computer science fundamentals (algorithms, data structures, networking, databases); Proven experience designing and scaling distributed systems focusing on performance, observability, and fault tolerance; Strong architectural instincts and the ability to make high-leverage technical decisions that impact multiple teams and systems; Demonstrated ability to influence and mentor senior engineers, guide teams through ambiguity, and elevate engineering practices across the board; Exceptional ownership mindset — you drive initiatives forward, raise the bar, and deliver lasting impact; Excellent communication and cross-functional collaboration skills; Availability to work till 1pm EST (till 8 pm Kyiv time) ; Comfortable operating in a fast-paced, high-autonomy, product-driven environment; Experience with e-commerce and catalog management is preferred; Familiarity with Python , Django , Kubernetes , PostgreSQL , and AWS is strongly preferred, but deep expertise in analogous systems and a willingness to learn are welcome; Upper-intermediate English level. Nice to haves Strong experience with complex ETL flows and high-throughput systems is highly preferred. The benefits of joining us Professional growth Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps Competitive compensation We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities A selection of exciting projects Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands Flextime Tailor your schedule for an optimal work-life balance, by having the options of working from home and going to the office – whatever makes you the happiest and most productive. Meet Our Recruitment Process Asynchronous stage – An automated, self-paced track that helps us move faster and give you quicker feedback: Short online form to confirm basic requirements 30–60 minute skills assessment via Codility – a platform founded in Poland that helps us provide quicker feedback and streamline this stage of the process. 5-minute introduction video Synchronous stage – Live interviews Technical interview with our engineering team (scheduled at your convenience) Final interview with your future teammates If it’s a match — you’ll get an offer!

🏢 Summary: Backend-focused software engineering role responsible for designing and implementing scalable, high-performance Java applications. The position involves enhancing system architecture, performance, and resilience while developing new features and maintaining backend services. You will work in an Agile team environment, emphasizing clean code, testing, and database optimization. 🗂️ Requirements: 5+ years backend software development experience, Strong knowledge of core Java and JDK, Experience designing high-performance multithreaded systems, Solid understanding of software architecture and design patterns, Experience writing automated tests with JUnit, Advanced debugging and performance profiling skills, Strong knowledge of relational databases, Experience with PostgreSQL, Experience with Hibernate or JPA, Ability to work in Agile environment 📃 Skills: Java, JDK, JUnit, PostgreSQL, Hibernate, JPA, SQL, JAX-RS, Spring, Agile, Multithreading 🏢 Description: You will join a high-performing team of software engineers, with the ability to work on the backend or full stack, but primarily working on the backend, and taking responsibility for implementing a range of new application features, as well as improving the architecture, performance, scalability, and resilience of the existing product. Responsibilities Design and implement clean, modular, scalable, and testable code for the Java backend. Conducting performance analysis and profiling for backend systems and databases, ensuring the system’s scalability and high performance. Apply advanced testing and debugging methods to resolve complex software issues. Work collaboratively with local and distributed teams in an Agile environment to continuously enhance product functionality. Required skills and qualifications 5+ years of hands-on backend software development, with an in-depth knowledge of core Java/JDK. Solid understanding of software architecture, design patterns, and core software engineering principles. (Experience designing and implementing high-performance, multithreaded, state-driven systems. Proficiency in creating meaningful automated tests (we use JUnit) and applying advanced testing and debugging techniques. In-depth knowledge of relational databases (we use Postgres) and ORM technologies such as Hibernate/JPA. Strong communication skills with the ability to effectively interface with stakeholders. Excellent problem-solving skills with a strong capacity for independent work. Ability to work both independently and collaboratively as part of a team in an Agile environment. Communicative English Preferred skills and qualifications Bachelor's or Master's degree in Computer Science, Engineering, or a related subject. Experience developing REST APIs using JAX-RS, Spring, or similar technologies. 2+ years of experience with Angular or similar modern frontend frameworks. Experience with E2E testing frameworks such as Playwright or Cypress. Mentorship, coaching, or leadership experience or demonstrable aptitude. In return for your expertise, we’ll support you in this new challenge with coaching & development every step of the way. Also, to reward your work, you’ll get the following: Contract of Employment (UoP) Private medical coverage, Multisport Life insurance (two annual incomes), Employee Stock Purchase Plan – 15% discount for buying Motorola’s Stock units, Employee Pension Plan – 3,5 % of the month’s salary gross, which goes to the retirement account IP Tax Relief (up to 80%) Yearly salary increase (depends on individual performance) Yearly bonus (depends on company performance) Flexible working hours (usually the day starts between 7-10), 8 hours working day (30 minutes lunch break included). Hybrid work mode

🏢 Summary: Backend-focused Java Engineer role responsible for designing and implementing scalable, high-performance application features while improving architecture, resilience, and system scalability. The position involves performance analysis, advanced testing, and database optimization within an Agile environment. You will primarily work on the Java backend, contributing to clean, modular, and testable code. 🗂️ Requirements: 5+ years backend development experience, Strong knowledge of core Java/JDK, Experience with high-performance multithreaded systems, Solid understanding of software architecture and design patterns, Experience writing automated tests with JUnit, Advanced testing and debugging skills, Experience with relational databases, Knowledge of PostgreSQL, Experience with ORM frameworks, Knowledge of Hibernate or JPA, Experience with backend performance analysis and profiling 📃 Skills: Java, JDK, JUnit, PostgreSQL, Hibernate, JPA, SQL, Multithreading, REST, JAX-RS, Spring, Angular, Playwright, Cypress, Agile 🏢 Description: You will join a high-performing team of software engineers, with the ability to work on the backend or full stack, but primarily working on the backend, and taking responsibility for implementing a range of new application features, as well as improving the architecture, performance, scalability, and resilience of the existing product. Responsibilities Design and implement clean, modular, scalable, and testable code for the Java backend. Conducting performance analysis and profiling for backend systems and databases, ensuring the system’s scalability and high performance. Apply advanced testing and debugging methods to resolve complex software issues. Work collaboratively with local and distributed teams in an Agile environment to continuously enhance product functionality. Required skills and qualifications 5+ years of hands-on backend software development, with an in-depth knowledge of core Java/JDK. Solid understanding of software architecture, design patterns, and core software engineering principles. (Experience designing and implementing high-performance, multithreaded, state-driven systems. Proficiency in creating meaningful automated tests (we use JUnit) and applying advanced testing and debugging techniques. In-depth knowledge of relational databases (we use Postgres) and ORM technologies such as Hibernate/JPA. Strong communication skills with the ability to effectively interface with stakeholders. Excellent problem-solving skills with a strong capacity for independent work. Ability to work both independently and collaboratively as part of a team in an Agile environment. Communicative English Preferred skills and qualifications Bachelor's or Master's degree in Computer Science, Engineering, or a related subject. Experience developing REST APIs using JAX-RS, Spring, or similar technologies. 2+ years of experience with Angular or similar modern frontend frameworks. Experience with E2E testing frameworks such as Playwright or Cypress. Mentorship, coaching, or leadership experience or demonstrable aptitude. In return for your expertise, we’ll support you in this new challenge with coaching & development every step of the way. Also, to reward your work, you’ll get the following: Contract of Employment (UoP) Private medical coverage, Multisport Life insurance (two annual incomes), Employee Stock Purchase Plan – 15% discount for buying Motorola’s Stock units, Employee Pension Plan – 3,5 % of the month’s salary gross, which goes to the retirement account IP Tax Relief (up to 80%) Yearly salary increase (depends on individual performance) Yearly bonus (depends on company performance) Flexible working hours (usually the day starts between 7-10), 8 hours working day (30 minutes lunch break included). Hybrid work mode

🏢 Summary: Senior Backend Engineer role to architect and build the core systems of a next-generation AdTech platform embedding products into visual experiences. The position focuses on designing high-throughput, low-latency distributed services for campaign delivery, targeting, attribution, and reporting using Python, Django, Kubernetes, and AWS. Engineers define system architecture from the ground up and drive scalability, reliability, and performance. 🗂️ Requirements: 3–4 years of experience building scalable systems, Experience in AdTech domain, Strong knowledge of algorithms, data structures, networking, databases, Experience designing and scaling distributed systems, Focus on performance, observability, fault tolerance, Experience with Python and Django or other backend languages, Experience with Kubernetes, Experience with PostgreSQL, Experience with AWS, Ability to design system architecture, Upper-intermediate English 📃 Skills: Python, Django, Kubernetes, PostgreSQL, AWS, AdTech, ETL, APIs, DistributedSystems, Algorithms, DataStructures, Networking, Databases 🏢 Description: ID52365 AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards. Why join us If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you! :) About the role Join as a Senior Backend Developer (AdTech) to help build a next-generation advertising platform powered by scalable backend systems, real-time data processing, and distributed architectures. You will work with technologies such as Python, Django, Kubernetes, PostgreSQL, and AWS while contributing to technical direction and engineering standards in an early-stage environment. This role offers strong ownership, collaboration with experienced engineers, and the opportunity to create products used by millions of people. What you will do Architect, build, and evolve core systems for the Ads platform; Design APIs and services supporting campaign management, targeting, delivery, attribution, and reporting; Build and optimize high-throughput, low-latency systems processing large volumes of events and data; Own critical systems end-to-end, including design, implementation, deployment, monitoring, and ongoing improvements; Drive architectural decisions and establish patterns that support scalability, reliability, and developer productivity; Collaborate closely with product, data, and partner teams to translate business requirements into robust technical solutions; Provide technical leadership through design reviews, system discussions, and mentoring other engineers; Contribute to engineering best practices, documentation, and long-term platform vision; Participate in hiring and help grow a strong, high-performing team. Must haves 5 years of software development experience building scalable systems (backend programming languages/frameworks, e.g. Java , .NET , Python , Node.js etc); Experience with AdTech ; Experience with DSPs, SSPs, ad exchanges, affiliate programs, Prebid.js, Prebid Server, Google Ad Manager, Amazon UAM/TAM, OpenRTB, identity and addressability solutions, as well as ad operations workflows; Deep understanding of computer science fundamentals (algorithms, data structures, networking, databases); Proven experience designing and scaling distributed systems focusing on performance, observability, and fault tolerance; Strong architectural instincts and the ability to make high-leverage technical decisions that impact multiple teams and systems; Demonstrated ability to influence and mentor senior engineers, guide teams through ambiguity, and elevate engineering practices across the board; Exceptional ownership mindset — you drive initiatives forward, raise the bar, and deliver lasting impact; Excellent communication and cross-functional collaboration skills; Comfortable operating in a fast-paced, high-autonomy, product-driven environment; Experience with e-commerce and catalog management is preferred; Familiarity with Python , Django , Kubernetes , PostgreSQL , AWS is strongly preferred, but deep expertise in analogous systems and a willingness to learn are welcome; Upper-intermediate English level. Nice to haves Strong experience with complex ETL flows and high-throughput systems is highly preferred. The benefits of joining us Professional growth Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps Competitive compensation We match your ever-growing skills, talent, and contributions with competitive USD-based compensation and budgets for education, fitness, and team activities A selection of exciting projects Join projects with modern solutions development and top-tier clients that include Fortune 500 enterprises and leading product brands Flextime Tailor your schedule for an optimal work-life balance, by having the options of working from home and going to the office – whatever makes you the happiest and most productive. Meet Our Recruitment Process Asynchronous stage – An automated, self-paced track that helps us move faster and give you quicker feedback: Short online form to confirm basic requirements 30–60 minute skills assessment via Codility – a platform founded in Poland that helps us provide quicker feedback and streamline this stage of the process. 5-minute introduction video Synchronous stage – Live interviews Technical interview with our engineering team (scheduled at your convenience) Final interview with your future teammates If it’s a match — you’ll get an offer!