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 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: 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: 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: The offer is for a Java Developer responsible for analyzing requirements, designing and implementing new functionalities, and maintaining existing systems in the insurance domain. The role involves end-to-end participation in software development, including testing, documentation, and code quality assurance within a collaborative team environment. 🗂️ Requirements: Practical knowledge of Java, Basic knowledge of JEE, Basic knowledge of relational databases, Basic knowledge of SQL (Oracle), Knowledge of object-oriented analysis, Basic knowledge of Linux 📃 Skills: Java, JEE, SQL, Oracle, Linux, OOP 🏢 Description: Main responsibilities: Analysis of client requirements Designing new solutions and functionalities Implementation of new solutions Maintenance of existing features Ensuring the quality of developed and maintained code Testing developed solutions Documenting implemented solutions Sharing knowledge across the team and participating in code reviews Continuous collaboration with other team members Our requirements: Practical knowledge of the Java programming language Basic knowledge of JEE Basic knowledge of relational databases and SQL (Oracle) Knowledge of object-oriented analysis Basic knowledge of the Linux operating system English language skills required for communication and working with technical documentation Good communication and collaboration skills Fluent Polish language skills Nice to have: Proven experience with Spring Boot, RESTful API design and JWT authentication Proven experience with Angular frontend Advanced knowledge of Linux operating system German language skills We offer: Opportunity to work on various phases of software projects, including analysis, design, implementation, integration, testing, and troubleshooting Work with a friendly and supportive development team Flexible working hours Stable employment German language course Private medical care with the option to extend coverage to family members Group insurance Holiday subsidy No dress code About us: We maintain and develop existing and new management systems and IT systems for insurance companies.

🏢 Summary: The offer is for an experienced Backend Java Developer to design, develop, and support Java applications for savings and investment products within a financial institution. The role focuses on building calculation engines compliant with international tax regulations, integrating with tax authorities, and delivering customer-facing reporting solutions. It involves full software development lifecycle participation, collaboration with analysts, and mentoring team members in a hybrid work model in Poland. 🗂️ Requirements: Strong proficiency in Java 21, Experience with Spring Boot and Hibernate, Experience with relational databases and SQL, Knowledge of PostgreSQL, Knowledge of JMS and MQ messaging protocols, Familiarity with OpenAPI and AsyncAPI, Proficiency with Git, Experience with CI/CD pipelines, Understanding of software design patterns, Understanding of object-oriented programming principles, Ability to participate in full software development lifecycle 📃 Skills: Java, Spring, Hibernate, SQL, PostgreSQL, JMS, MQ, OpenAPI, AsyncAPI, Git, CI/CD 🏢 Description: Introduction & Summary: The position requires experienced Backend Java Developers to join a prominent financial institution. The ideal candidates will possess extensive knowledge in Java development, particularly within financial services, and demonstrate strong analytical and collaboration skills. This role will involve the design, implementation, and support of Java applications that manage essential financial products. Main Responsibilities: As a Backend Java Developer, you will be responsible for creating and maintaining robust Java applications. Key responsibilities include: Designing, developing, and enhancing Java applications supporting savings and investment products. Building calculation engines ensuring compliance with tax regulations across multiple countries. Integrating with tax authorities and generating customer-facing reports. Participating in the complete software development lifecycle, including requirements analysis, design, coding, testing, and deployment. Collaborating with financial analysts to transform requirements into technical solutions. Mentoring other developers and acting as a code reviewer. Utilizing AI-assisted development to improve productivity and quality. Key Requirements: Strong proficiency in Java (version 21) and related frameworks (Spring Boot, Hibernate). Experience with relational databases and SQL (PostgreSQL). Knowledge of messaging protocols such as JMS and MQ. Familiarity with OpenAPI and AsyncAPI for data management. Proficiency in version control systems (Git) and CI/CD pipelines. Understanding of software design patterns and object-oriented programming principles. Excellent collaboration and analytical skills. Nice to Have: Experience in financial services or related domains. Keen interest in emerging technologies. Other Details: This role is based in Poland with a hybrid work model requiring three days at the office from Gdańsk/Warsaw. The engagement focuses on enhancing financial solutions in the investment sector.

🏢 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 Java Developer role to design and build a greenfield backend platform for the STP Lending Manager application using Java and Spring Boot. The position focuses on shaping architecture, implementing scalable solutions, and integrating systems via REST and Kafka. The role involves ownership of backend components and collaboration within an Agile environment. 🗂️ Requirements: 8+ years of experience with Java (Java 21+), 8+ years of experience with Spring Boot, 8+ years of experience with JPA, Experience with Maven, Experience with Liquibase, Experience building REST integrations, Experience with Kafka event streaming, Strong backend development skills, Experience working in Agile environment, Ability to work in English 📃 Skills: Java, SpringBoot, JPA, Maven, Liquibase, REST, Kafka, SQL, GitHubCopilot, Cucumber, Agile 🏢 Description: As a recruitment company, DCG understands that every business is powered by experienced professionals. Our management style and partnership approach enable us to meet your needs and provide continuous support. Due to our ongoing growth and the large number of recruitment projects we undertake for our partners, we are currently looking for: Senior Java Developer Responsibilities: Design and build a backend Java platform for the STP Lending Manager application from the ground up Contribute to a greenfield project, shaping architecture and core technical solutions from an early stage Develop a scalable and maintainable backend using Java and Spring Boot Implement integrations with surrounding systems using REST APIs and Kafka‑based event streaming Use JPA for data persistence, ensuring clean architecture and high code quality Apply database version control using Liquibase Collaborate closely with Business SMEs and the Product Owner to clarify requirements and design solutions jointly Work in an Agile environment, contributing to continuous improvement and transparent team collaboration Use AI‑assisted development tools (e.g. GitHub Copilot) to improve development efficiency and code quality Take clear ownership of backend components and solution‑level decisions Requirements: 8+ years of professional experience with Java (Java 21+) 8+ years of experience with Spring Boot 8+ years of experience working with JPA Experience using Maven Experience with Liquibase for database schema versioning Strong backend development skills with a focus on clean, maintainable code Very good communication skills and ability to work in English Nice to have: Experience with Cucumber for testing 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.