Senior Java Developer

🏢 Summary: Development and modernization of Java-based applications for pension and savings products, focusing on taxation, account management, and investment processing. The role includes upgrading systems to Java 17+ and Spring Boot 3.3.x, building calculation engines compliant with multi-country tax regulations, and integrating with external authorities. Full involvement in the software development lifecycle from design to deployment is required. 🗂️ Requirements: Strong proficiency in Java, Experience with Spring Boot and Spring framework, Experience with Hibernate, Experience upgrading applications to Java 17+ and Spring Boot 3.x, Experience with relational databases, Strong SQL knowledge, Experience with PostgreSQL, Knowledge of OpenAPI and AsyncAPI, Experience with messaging systems, Familiarity with Git, Experience with CI/CD pipelines, Understanding of OOP principles, Knowledge of design patterns 📃 Skills: Java, Spring, SpringBoot, Hibernate, SQL, PostgreSQL, OpenAPI, AsyncAPI, JMS, MQ, Git, CI/CD, OOP, DesignPatterns 🏢 Description: Location: hybrid in Warsaw, Gdynia or Gdańsk (3 days per week from office) Rate: up to 160 pln/h on b2b Tech stack: Java 21, Spring Boot, Postgres SQL, Messaging protocols such as JMS, MQ Summary: This role focuses on developing and enhancing Java-based applications related to taxation, account management, and investment processing for pension and savings products, ensuring compliance with regulations. Main Responsibilities: Upgrade applications to at least Java 17 and Spring Boot 3.3.x, with experience in upgrade projects. Design, develop, and maintain Java applications for savings and investment products. Build robust calculation engines for compliance with tax regulations across multiple countries. Develop support for complex business processes, integrating with tax authorities, and generating customer-facing reports. Participate in the full software development lifecycle: requirements analysis, design, coding, testing, and deployment. Collaborate with financial analysts to translate requirements into technical solutions. Key Requirements: Strong proficiency in Java and related frameworks (Spring boot, Spring, Hibernate, etc.) Experience with relational databases and SQL (PostgreSQL, etc.) Knowledge of OpenAPI and AsyncAPI for producing and consuming data Familiarity with version control systems (Git) and CI/CD pipelines Understanding of software design patterns and object-oriented programming principles Nice to Have: Familiarity with financial products and services.

🏢 Summary: The offer is for a Java Backend Developer role focused on building and maintaining microservices for credit risk and scoring platforms. The position involves developing compliant calculation engines, integrating with external credit systems, and participating in the full software development lifecycle within a Scrum team. The role emphasizes high engineering standards and collaboration in a regulated financial environment. 🗂️ Requirements: Minimum 1 year experience in Java backend development, Experience with microservices-based architectures, Strong hands-on experience with Java 21+, Experience with Spring and Spring Boot, Experience with Hibernate, Experience designing and developing REST APIs, Experience designing and developing SOAP APIs, Knowledge of unit, component, and integration testing, Experience with JUnit and Mockito, Experience with Git, Experience with Maven, Experience with CI/CD environments, Knowledge of object-oriented programming, Understanding of design patterns, Understanding of SOLID principles, Fluent English communication skills 📃 Skills: Java, Spring, SpringBoot, Hibernate, JSON, XML, REST, SOAP, JUnit, Mockito, Git, Maven, Jenkins, Bitbucket, CI/CD, OOP, SOLID, SQL, Kafka, Kubernetes 🏢 Description: Responsibilities: Design, develop, and maintain Java-based microservices supporting credit risk and scoring platforms Build robust calculation engines ensuring compliance with credit scoring and recommendation regulations across multiple countries Implement and support complex business processes, including integrations with credit authorities and external systems Participate in the full software development lifecycle: requirements analysis, architecture design, development, testing, deployment, and maintenance Collaborate with business analysts and cross-functional teams to translate business needs into technical solutions Work within a Scrum team, contributing to continuous improvement and high engineering standards Requirements: Minimum 1 year of professional experience in Java backend development, preferably within microservices-based architectures Strong hands-on experience with Java 21+ and related frameworks (Spring, Spring Boot, Hibernate, JSON, XML) Proven experience designing and developing REST/SOAP APIs Solid understanding of unit, component, and integration testing (JUnit, Mockito) Familiarity with Git, Maven, and CI/CD environments (Jenkins, Bitbucket) Strong knowledge of object-oriented programming, design patterns, and SOLID principles Fluent English communication skills (spoken and written) Nice to have: Basic knowledge of SQL; experience with Kafka and Kubernetes Previous experience in the banking or financial services sector Offer: Private medical care Co-financing for the sports card Constant support of dedicated consultant Employee referral program

🏢 Summary: Senior Fullstack Developer role focused on building a greenfield solution using Java 17+ and Spring Boot on the backend and React on the frontend. The position involves end-to-end development, architecture co-creation, REST API design, and ensuring code quality within an Agile environment. The role requires close collaboration with business stakeholders and active participation in technical decision-making. 🗂️ Requirements: Minimum 8 years of experience in Java 17+, Minimum 5 years of experience with React, Minimum 5 years of experience with Spring Boot, Minimum 5 years of experience with JPA, Experience in building full-stack applications, Practical experience in REST API design, Experience with relational databases, Experience working in Agile methodology, Ability to analyze business requirements technically, Very good English skills 📃 Skills: Java, Spring, SpringBoot, React, JPA, REST, SQL, Agile, Selenium, Liquibase, Maven, Cucumber 🏢 Description: Responsibilities: Design and development of applications in fullstack architecture (backend + frontend) Creation and development of the backend layer based on Java 17+ and Spring Boot Building and developing the user interface in React with an emphasis on UX and readability Modeling and implementation of the data access layer (JPA) Cooperation with the business team in analyzing and clarifying requirements Breaking down requirements into user stories and estimating work Designing and implementing end-to-end tests Ensuring code quality (code review, best practices, clean code) Co-creating the architecture of a greenfield project solution Collaborating in an Agile environment (refinements, sprint planning, daily, retrospectives) Participating in technological decision-making Requirements: Minimum 8 years of experience in Java programming (version 17+) Minimum 5 years of experience with: React, Spring Boot and JPA Experience in building full-stack applications (backend + frontend) Practical knowledge of REST API design Experience in working with relational databases Ability to work with business requirements and their technical analysis Experience in working with Agile methodology Very good knowledge of English (working in an international environment) Independence, proactivity, and ability to make technical decisions Nice to have: Experience with: Selenium, Liquibase for database versioning, Maven and Cucumber for testing Offer: Private medical care Co-financing for the sports card Constant support of dedicated consultant Employee referral program

🏢 Summary: Senior Fullstack Developer role focused on designing and building a greenfield application using Java 17+ and Spring Boot on the backend and React on the frontend. The position involves end-to-end development, architectural decisions, REST API design, and ensuring code quality within an Agile environment. The role also includes close collaboration with business stakeholders and participation in technical decision-making. 🗂️ Requirements: Minimum 8 years of experience with Java 17+, Minimum 5 years of experience with React, Minimum 5 years of experience with Spring Boot, Minimum 5 years of experience with JPA, Experience building fullstack applications, Practical experience designing REST APIs, Experience with relational databases, Experience working in Agile methodology, Ability to analyze business requirements technically, Very good English proficiency 📃 Skills: Java, Spring, SpringBoot, React, JPA, REST, SQL, Agile, Selenium, Liquibase, Maven, Cucumber 🏢 Description: Responsibilities: Design and development of applications in fullstack architecture (backend + frontend) Creation and development of the backend layer based on Java 17+ and Spring Boot Building and developing the user interface in React with an emphasis on UX and readability Modeling and implementation of the data access layer (JPA) Cooperation with the business team in analyzing and clarifying requirements Breaking down requirements into user stories and estimating work Designing and implementing end-to-end tests Ensuring code quality (code review, best practices, clean code) Co-creating the architecture of a greenfield project solution Collaborating in an Agile environment (refinements, sprint planning, daily, retrospectives) Participating in technological decision-making Requirements: Minimum 8 years of experience in Java programming (version 17+) Minimum 5 years of experience with: React, Spring Boot and JPA Experience in building full-stack applications (backend + frontend) Practical knowledge of REST API design Experience in working with relational databases Ability to work with business requirements and their technical analysis Experience in working with Agile methodology Very good knowledge of English (working in an international environment) Independence, proactivity, and ability to make technical decisions Nice to have: Experience with: Selenium, Liquibase for database versioning, Maven and Cucumber for testing Offer: Private medical care Co-financing for the sports card Constant support of dedicated consultant Employee referral program

🏢 Summary: Remote B2B contract for a Senior Java Developer focused on Savings & Investments products, including tax calculation engines, integrations, and reporting tools. The role involves full software development lifecycle participation, collaboration with stakeholders, mentoring developers, and contributing to engineering best practices. Benefits include private healthcare, Multisport card, e-learning access, and group life insurance. 🗂️ Requirements: 6+ years of Java development experience, Strong knowledge of Java 21, Strong knowledge of Spring Boot, Experience with Spring Framework, Experience with Hibernate, PostgreSQL expertise, SQL expertise, Knowledge of JMS, MQ, or similar messaging technologies, Experience with OpenAPI, Experience with AsyncAPI, Familiarity with Git, Familiarity with CI/CD pipelines, Understanding of OOP principles, Understanding of design patterns, Strong analytical skills, Strong communication skills 📃 Skills: Java, Spring, SpringBoot, Hibernate, PostgreSQL, SQL, JMS, MQ, OpenAPI, AsyncAPI, Git, CI/CD, OOP 🏢 Description: Senior Java Developer Location: Remote Start Date: ASAP / up to 30 days notice period Contract Type: B2B via Experis Responsibilities Develop and maintain Java applications for Savings & Investments products Build tax calculation engines compliant with international regulations Create integrations, business process solutions, and customer reporting tools Participate in the full software development lifecycle Collaborate with business stakeholders and mentor other developers Contribute to code reviews and engineering best practices Requirements 6+ years of Java development experience Strong knowledge of Java 21 and Spring Boot Experience with Spring Framework and Hibernate PostgreSQL and SQL expertise Knowledge of JMS, MQ, or similar messaging technologies Experience with OpenAPI and AsyncAPI Familiarity with Git and CI/CD pipelines Understanding of OOP principles and design patterns Strong analytical and communication skills Benefits Fully remote work Private healthcare (Medicover) Multisport card Access to e-learning platforms Group life insurance

🏢 Summary: Development and modernization of enterprise banking systems used by millions of customers, focused on large-scale architectural initiatives. The role involves implementing and enhancing Java-based applications and services with strong emphasis on quality, performance, and reliability. Responsibilities include testing, technical analysis, and participation in complex technology projects. 🗂️ Requirements: Minimum 5 years commercial experience in Java, Experience with Java 11 or higher, Knowledge of Spring Boot or Spring Integration, Knowledge of Hibernate, Knowledge of relational databases, Experience with Git, Experience with Maven, Experience with Jira, Experience with Jenkins, Knowledge of SOAP and REST, Knowledge of XML and JSON, Higher education in Computer Science or related field, Ability to work in a team 📃 Skills: Java, Java11, SpringBoot, SpringIntegration, Hibernate, RelationalDatabases, Git, Maven, Jira, Jenkins, SOAP, REST, XML, JSON 🏢 Description: Praca przy rozwiązaniach bankowych, które trafiają do ponad 12 mln klientów. Projekty dotyczą dużych, ambitnych inicjatyw technologicznych, modernizacji architektury oraz rozwoju rozwiązań w środowisku enterprise. Twój zakres obowiązków Implementacja nowych i modyfikacja istniejących aplikacji i serwisów Tworzenie testów jednostkowych i integracyjnych Dbanie o wysoką jakość oprogramowania w zakresie funkcjonalności, wydajności i niezawodności Dokumentowanie zaimplementowanych rozwiązań Analiza możliwych rozwiązań technicznych Udział w pracach projektowych Nasze wymagania Minimum 5 lat komercyjnego doświadczenia w programowaniu w Java Doświadczenie w pracy z Java 11 lub wyższą Znajomość Spring Boot lub Spring Integration Znajomość Hibernate Znajomość relacyjnych baz danych Znajomość narzędzi Git, Maven, Jira i Jenkins Znajomość standardów SOAP, REST, XML i JSON Wykształcenie wyższe informatyczne lub pokrewne Umiejętność pracy w zespole Mile widziane Doświadczenie w środowisku chmurowym GCP Znajomość BigQuery, CloudSQL lub Pub/Sub Praktyczna znajomość nierelacyjnych baz danych Doświadczenie z konteneryzacją Znajomość Anthos, Kubernetes Engine lub Docker Znajomość innych frameworków, na przykład Micronaut Doświadczenie w bankowości

🏢 Summary: The offer is for a Senior Java Developer responsible for developing and modernising a Corporate Netbank application, including backend services and REST APIs. The role involves working with both microservices and monolithic architecture, implementing new features, fixing bugs, and supporting production in an Agile/SAFe environment. The position also requires analysing legacy code and contributing to ongoing system improvements. 🗂️ Requirements: Minimum 5 years of Java development experience, Strong experience with Java 7/8, Practical experience with Maven, Practical experience with Git, Practical experience with Spring Framework, Practical experience with Spring Boot, Good knowledge of SQL, Experience with JSP, Experience with JavaScript, Experience in writing REST APIs, Experience in backend services design and implementation, Experience with unit testing, Minimum 2 years of experience with Angular, Minimum 2 years of experience with Jasmine, Experience working in Agile environment, Willingness to analyse and maintain legacy code, Fluency in English 📃 Skills: Java, Maven, Git, Spring, SpringBoot, SQL, JSP, JavaScript, REST, Angular, Jasmine, Agile, Microservices 🏢 Description: Responsibilities: Developing, maintaining, and enhancing the Corporate Netbank application Implementing new features and improvements based on business and technical requirements Fixing bugs and supporting the resolution of production incidents Implementing compliance and mandatory business changes Designing and implementing backend services according to given specifications Writing and maintaining REST APIs Working with both microservice-based and monolithic architecture Implementing unit tests to ensure high-quality delivery Analysing and working with legacy code Collaborating with international teams in an Agile/SAFe environment Supporting the ongoing modernisation of the existing system Requirements: Minimum 5 years of experience with Java development Strong experience with Java 7/8 Practical experience with Maven, Git, Spring Framework, and Spring Boot Good knowledge of SQL Experience with JSP, JavaScript, and frontend-related development Experience in writing REST APIs Experience in backend services design and implementation Experience with unit testing Minimum 2 years of experience with Angular and Jasmine Experience working in an Agile environment Willingness to analyse, maintain, and improve legacy code Good communication skills Fluency in English Nice to have: Knowledge of SOLID principles Knowledge of design patterns Offer: Private medical care Co-financing for the sports card Constant support of dedicated consultant Employee referral program

🏢 Summary: Backend Java Developer role focused on building and maintaining high-performance, scalable systems for transaction, payment, and cashier functionalities within a complex trading platform. The position involves developing RESTful and RPC APIs, handling high-concurrency and large-scale data processing in distributed environments, and integrating with third-party services. The role requires strong production troubleshooting skills and collaboration within cross-functional teams. 🗂️ Requirements: 5+ years of Java backend development experience, Strong experience with Java 8+, Strong experience with Spring Boot, Experience in fintech product development, Experience with B2B systems, Hands-on experience with high-concurrency and multi-threaded environments, Experience with high-volume traffic systems, Experience with large-scale data processing, Knowledge of MyBatis, Redis, and message queues, Experience with MySQL and complex query optimization, Experience with Elasticsearch, Experience with Hadoop or big data technologies, Experience with event-driven architectures, Experience with unit and integration testing, Experience integrating third-party APIs, Understanding of distributed systems and microservices, EU work permit and EU-based work availability 📃 Skills: Java, Spring, SpringBoot, MyBatis, Redis, MySQL, Elasticsearch, Hadoop, Dubbo, REST, RPC, SQL, Multithreading, Microservices, Kafka, RabbitMQ 🏢 Description: 🟣 You will be: designing, developing, and maintaining high-performance backend systems using Java and Spring Boot, working on transaction, payment, and cashier-related functionalities within a complex trading platform, building and maintaining RESTful and RPC APIs (e.g. using Apache Dubbo), developing solutions capable of handling high-volume traffic, high concurrency, and multi-threaded environments, processing and optimizing large volumes of data within distributed systems, collaborating with cross-functional teams to deliver scalable and reliable systems, integrating backend services with third-party applications and external systems, troubleshooting, debugging, and optimizing system performance in production environments. 🟣 Your profile: 5+ years of professional experience in Java backend development, strong experience with Java (8+) and Spring Boot, experience in business product development within fintech environments, experience working on B2B products, hands-on experience with high-concurrency systems, multi-threading, and high-volume traffic environments, proven experience working with large-scale data processing systems, solid knowledge of technologies such as MyBatis, Redis, and message queue systems, experience working with relational databases such as MySQL, including writing complex queries and performance tuning, experience working with Elasticsearch and big data technologies such as Hadoop, experience with messaging systems (queues) and event-driven architectures, experience with unit and integration testing, experience integrating with third-party services and APIs, strong debugging and problem-solving skills, solid understanding of software design patterns and backend architectures, practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery, good communication skills and ability to work in a team environment, immediate availability or a short notice period is preferred. Work from the European Union region and a work permit are required. 🟣 Nice to have: familiarity with RPC frameworks such as Apache Dubbo, experience working with systems serving large-scale user bases, understanding of distributed systems and microservices architecture, experience applying GenAI in a more structured way within the SDLC, including defined workflows, prompt patterns, or tool integrations embedded into daily work, interest in and familiarity with emerging AI-driven practices (e.g. agent-based workflows, automation patterns, AI-augmented development), with a willingness to explore and experiment beyond standard approaches. 🟣 Recruitment Process: CV review – HR call – Technical Interview – Client Interview – Decision 🎁 Benefits 🎁 ✍ Development: development budgets of up to 6,800 PLN, we fund certifications e.g.: AWS, Azure, access to Udemy, O'Reilly (formerly Safari Books Online) and more, events and technology conferences, technology Guilds, internal training, Xebia Upskill. 🩺 We take care of your health: private medical healthcare, multiSport card - we subsidise a MultiSport card, mental Health Support. 🤸‍♂️ We are flexible: B2B or employment contract, contract for an indefinite period.

🏢 Summary: Senior Java Developer / Technical Lead role focused on building and enhancing high-performance, low-latency trading systems. The position drives end-to-end delivery of complex engineering initiatives, contributes to architecture decisions, and improves system scalability and reliability. It involves close collaboration with engineering and business stakeholders while mentoring other developers and evolving technical standards. 🗂️ Requirements: 8+ years of software development experience, Strong proficiency in Java, Solid understanding of concurrent and multithreaded programming, Experience building distributed systems, Proven ability to deliver complex technical solutions, Experience working in cross-functional environments, Strong communication skills, Ability to work in dynamic, fast-paced environments, Familiarity with modern development tools including AI-supported solutions, Willingness to work with technologies beyond Java 📃 Skills: Java, Concurrency, Multithreading, DistributedSystems, LowLatency, TradingSystems, Architecture, AItools 🏢 Description: Senior Java Developer / Technical Lead Responsibilities Develop and enhance high-performance components within a low-latency trading environment. Drive delivery of key engineering initiatives across the full lifecycle — from concept and design to deployment and support. Take ownership of complex technical areas, working cross-functionally with engineering and business stakeholders. Contribute to architectural decisions and help evolve engineering standards and best practices. Support and guide other engineers through knowledge sharing, collaboration, and hands-on problem solving. Participate in design discussions and code reviews to ensure high-quality solutions. Continuously improve system performance, scalability, and reliability. Work closely with business teams to translate requirements into technical solutions. Contribute to the ongoing modernization and simplification of existing systems and platforms. Requirements 8+ years of experience in software development, with a strong focus on Java Solid understanding of concurrent and multithreaded programming, Experience in a building financial/trading systems is a big plus Experience in building distributed systems. Proven ability to deliver complex technical solutions. Experience working in collaborative, cross-functional environments. Strong communication skills. Ability to work effectively in dynamic, fast-paced environments. Familiarity with modern development tools, including AI-supported solutions. Exposure to or willingness to work with technologies beyond Java

🏢 Summary: The offer is for an experienced Java Developer responsible for designing, developing, and maintaining high-quality software aligned with business requirements and architectural standards. The role involves implementing key functionalities, troubleshooting production issues, and enhancing CI/CD, testing automation, monitoring, and security practices. The position includes active participation in Agile processes and technical documentation. 🗂️ Requirements: Minimum 3–4 years of professional experience in Java development, Very good knowledge of Java and programming best practices, Experience with ElasticSearch, Kibana, Docker, Kubernetes, Redis, RabbitMQ, Knowledge of relational databases, especially Oracle and PostgreSQL, Experience with Microsoft Azure cloud solutions, Practical knowledge of CI/CD and build/deployment automation, Experience with unit and integration testing, Experience working in Agile/Scrum environment, English proficiency at B2/C1 level 📃 Skills: Java, ElasticSearch, Kibana, Docker, Kubernetes, Redis, RabbitMQ, Oracle, PostgreSQL, Azure, CI/CD, Agile, Scrum 🏢 Description: ZAKRES OBOWIĄZKÓW Tworzenie i rozwój wysokiej jakości oprogramowania zgodnie z obowiązującymi standardami oraz wymaganiami biznesowymi. Diagnozowanie i rozwiązywanie problemów w środowiskach testowych oraz produkcyjnych. Implementacja kluczowych funkcjonalności oraz dbanie o spójność i jakość architektury kodu. Tworzenie i utrzymywanie dokumentacji technicznej oraz architektonicznej. Wdrażanie i rozwój procesów CI/CD, automatyzacji testów, monitoringu oraz praktyk bezpieczeństwa aplikacji i infrastruktury. Aktywny udział w code review, wydarzeniach Agile oraz współpraca przy planowaniu i realizacji prac projektowych. CZEGO OCZEKUJEMY Minimum 3 - 4 lata doświadczenia zawodowego na stanowisku związanym z rozwojem oprogramowania w języku Java Bardzo dobra znajomość technologii Java oraz najlepszych praktyk programistycznych Praktyczne doświadczenie w pracy z narzędziami i technologiami takimi jak ElasticSearch, Kibana, Docker, Kubernetes, Redis oraz RabbitMQ Dobra znajomość relacyjnych baz danych, w szczególności Oracle i PostgreSQL Doświadczenie w pracy z rozwiązaniami chmurowymi opartymi o Microsoft Azure Praktyczna wiedza z zakresu CI/CD oraz automatyzacji procesów build/deployment Bardzo dobra znajomość zagadnień związanych z testowaniem jednostkowym i integracyjnym Doświadczenie w pracy w środowisku Agile/Scrum Znajomość języka angielskiego na poziomie B2/C1 , pozwalająca na swobodną komunikację w środowisku biznesowym i technicznym CO OFERUJEMY Pracę przy projektach klienckich i produktach własnych Realny wpływ na rozwiązania biznesowe i technologiczne w ramach realizowanych projektów Szkolenia oraz wsparcie w określeniu ścieżki rozwoju Eventy firmowe, dostęp do usług medycznych oraz pakietów sportowych Zatrudnienie na umowę B2B Pracę w trybie hybrydowym z biura w Gdańsku lub 100% zdalnie Krótki proces rekrutacji