Senior Java Developer

🏢 Summary: Senior Java Developer role supporting secure, scalable banking and payments systems in Warsaw, with a hybrid schedule of one remote day per week. The position covers solution design, development, testing, and delivery of event-driven microservices within distributed systems. 🗂️ Requirements: 4+ years of Java development experience in financial or similarly complex domains, Java, Spring, Hibernate, DB2, Spring Boot, and RESTful API expertise, Apache Kafka experience, including producers, consumers, Kafka Streams, and Kafka Connect, MongoDB and Spring Data MongoDB knowledge, Docker, Maven, Git, and CI/CD pipeline familiarity, Understanding of event-driven microservices and distributed systems, Communicative English, Existing legal right to work in the European Union 📃 Skills: Java, Spring, Hibernate, DB2, Kafka, MongoDB, Docker, Maven, Git, GitLab, CI/CD, REST 🏢 Description: Unleash innovative financial solutions — shape the future of fintech with Java excellence! Warsaw-based opportunity with hybrid work model (1 remote day per week). As a Senior Java Developer , you will be working for our client, a leader in financial technology solutions. You will contribute to critical projects in the banking and payments industry, shaping the evolution of secure, scalable financial systems and ensuring seamless integration of cutting-edge technologies. This role offers an excellent platform for career growth amidst a dynamic, global team. Your main responsibilities: Participate in requirements gathering sessions with business users to understand project needs. Lead analysis, solution design, and planning activities within the engineering team. Implement and rigorously test software changes; participate in code reviews and assist in UAT and releases. Innovate by improving existing stacks and developing new functionalities in a fast-paced environment. Contribute to the development of event-driven and microservices architectures within distributed systems. Collaborate effectively with international teams and stakeholders. Maintain high-quality documentation and ensure adherence to best practices. Engage actively in continuous improvement initiatives and process optimizations. You're ideal for this role if you have: 4+ years of proven experience in Java development within financial or similarly complex domains. Proficiency in Java, Spring, Hibernate, DB2, Spring Boot, and RESTful API design. Experience with Apache Kafka, including producers, consumers, Kafka Streams, and Kafka Connect. Knowledge of MongoDB and Spring Data MongoDB. Familiarity with Docker, Maven, Git, and CI/CD pipelines (preferably GitLab CI). Solid understanding of event-driven/microservices architectures and distributed systems. Strong analytical, communication, and teamwork skills. Ability to work in a fast-paced, collaborative environment with a strong work ethic. It is a strong plus if you have: Experience with IBM MQ / JMS and infrastructure as code. Knowledge of financial messaging standards such as ISO 20022, SWIFT, CBPR+, FIN. Python scripting and experience in financial services, payments, or banking technology. Language Required for the role: Communicative English proficiency. Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior Java Developer role leading the delivery of resilient, highly available, event-driven microservices for a high-stakes financial environment. The position owns complex backend features end to end, from data models and APIs through deployment, monitoring, testing, and CI/CD quality practices. 🗂️ Requirements: 7+ years of commercial backend development, Proven experience building complex, distributed, scalable systems, Java 21+, Spring Boot, PostgreSQL, Kafka, OpenAPI, Vault, Kubernetes, Docker, Terraform, GitLab CI or Jenkins, Maven, Microservices architecture, Event-driven design, RESTful APIs, SCRUM, Strong collaboration skills, Fluent English 📃 Skills: Java, SpringBoot, PostgreSQL, Kafka, OpenAPI, Vault, Kubernetes, Docker, Terraform, GitLab, Jenkins, Maven, Microservices, REST, SCRUM 🏢 Description: Senior Java Developer We are looking for a Senior Java Developer (7+ years of experience) to lead the development of resilient, highly available systems and event-driven microservices in a high-stakes financial environment. Requirements: Experience: 7+ years of commercial backend development with a proven track record of building complex, distributed, and scalable systems. Tech Stack: Backend: Java 21+, Spring Boot, PostgreSQL, Kafka, OpenAPI, Vault DevOps & Cloud: Kubernetes , Docker, Terraform, GitLab CI/Jenkins, Maven Core Skills: Microservices architecture, event-driven design, RESTful APIs, SCRUM, strong collaboration skills, and fluent English. Nice to Have: Financial services/FinTech background, experience in distributed global teams, and exposure to AI/LLM integrations. Responsibilities: Architecture & Infrastructure: Lead the development of scalable, event-driven microservices engineered for high throughput and maximum uptime. Data & Security: Design robust data models while ensuring strict data consistency and security in a financial ecosystem. End-to-End Feature Ownership: Own complex backend features across their full lifecycle—from schema and API definition to deployment and production monitoring. Cross-Functional Collaboration: Partner with global stakeholders and frontend engineers to translate complex financial workflows into high-performance technical specs. Engineering Excellence: Elevate code quality through code reviews, modern CI/CD automation, and comprehensive testing (Unit, Integration, and Contract testing).

🏢 Summary: Senior Java Developer role building and modernizing client-facing applications for Rates and Credit sales and trading desks on a scalable microservices platform. The position combines hands-on Java development, architecture, testing, and close collaboration with trading and Scrum teams, with hybrid or remote work options in Poland. 🗂️ Requirements: 3+ years of Java software development experience, Java collections, multithreading, concurrency utilities, IO/NIO and sockets, Asynchronous programming, Enterprise server-side solution architecture on cloud technologies, Spring Boot and ReactJS application development, Low-latency, high-throughput messaging systems, Design patterns, Java testing frameworks, automated testing and continuous integration, Agile development practices, Upper-Intermediate English (B2) or higher 📃 Skills: Java, Spring, ReactJS, JavaScript, TypeScript, HTML5, Microservices, Cloud, IO, NIO, Sockets, JUnit, Mockito, Cucumber, Scrum, XP, Kanban, CI 🏢 Description: We are seeking a Senior Java Developer passionate about delivering new and exciting applications to support Rates and Credit sales and trading desks on a high-end microservice platform. The platform intends to replace existing client-facing applications and uses state-of-the-art technologies (Microservices, Java 11+, React, JS/TS & HTML5, Spring Boot) and solutions allowing efficient development and automatic scalable deployment. Responsibilities Be a part of a scrum team working on delivering business value through software Implement and deliver high-quality software solutions Demonstrate superior collaboration skills when working with the trading desk and other teams Understand business requirements and translate them into code Design, build, and maintain efficient, reusable code Perform unit, integration, functional, and non-functional testing Provide technical direction and system architecture Requirements 3+ years of experience in software development using Java, with expertise in low-level parts of the API such as collections, multi-threading, and Java concurrency utilities Background in architecting enterprise-level, server-side, end-to-end solutions on cloud technologies Proficiency in IO/NIO, Sockets, and asynchronous programming Skills in building applications using an IOC framework such as Spring Boot and ReactJS Familiarity with low-latency, high-throughput messaging systems Sound understanding of design patterns (exposure to functional programming is also highly desirable) Knowledge of Java testing frameworks (JUnit, Mockito, Cucumber), automated testing, and continuous integration Competency in agile development practices (Scrum, XP, Kanban) Self-starting, with the desire to take ownership of requirements from start to finish Proactive and comfortable working in dynamic environments with fast-paced deliveries and changing requirements Excellent communicator, able to lead and drive fellow teammates to deliver good-quality software Proficiency in English at an Upper-Intermediate level (B2) or higher Nice to have Hands-on experience with ELK and event streaming platforms like Kafka or Spark Knowledge of application containerization such as Docker and Kubernetes Experience with performance stress testing and chaos engineering We offer We gather like-minded people: Top tech minds driving innovation in AI, cloud and digital platform modernization Supportive team and agile, startup-like culture Hybrid by design mode and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Career development programs Thought leadership, mentoring, soft skills and well-being programs Certification (Anthropic, Gemini, GCP, Azure, AWS) English classes We cover it all: Stable pay Participation in the Employee Stock Purchase Plan with a 15% discount Benefits package (health insurance, multisport, shopping vouchers) Referral bonuses up to $2,000 Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more Corporate, social and well-being events Please, note: Benefits listed above are available to employees only We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually We will reach out to selected candidates exclusively EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.

🏢 Summary: Oferta B2B dla Senior Java Developera obejmuje rozwój rozwiązań bankowości elektronicznej dla klientów korporacyjnych. Rola łączy tworzenie i projektowanie oprogramowania Java z testowaniem, integracjami, pracą z bazami danych oraz wsparciem zespołu; wymaga wizyt w biurze raz w tygodniu. 🗂️ Requirements: Minimum 5 lat doświadczenia jako Java Developer, Wykształcenie wyższe: informatyka, matematyka lub kierunek pokrewny, Doświadczenie w tworzeniu aplikacji Java, Dobra lub bardzo dobra znajomość relacyjnych baz danych i SQL, Znajomość projektowania baz danych, transakcji i blokad, Znajomość REST, JSON, SOAP, XML i XSD, Doświadczenie w Code Review, Doświadczenie w refaktoryzacji kodu, Znajomość wzorców projektowych i architektonicznych, Znajomość aplikacji rozproszonych i mikroserwisów, Doświadczenie w pracy z Jira i Confluence 📃 Skills: Java, SQL, REST, JSON, SOAP, XML, XSD, Microservices, Jira, Confluence 🏢 Description: Informacje o projekcie: Branża: bankowość Stawka: do ok. 160 zł/h netto + VAT, B2B Lokalizacja: wizyty raz w tygodniu w biurze w jednym z biur (Warszawa, Łódź, Gdańsk, Bydgoszcz, Katowice, Lublin, Wrocław, Szczecin) Poszukujemy Senior Java Developera do zespołu odpowiedzialnego za rozwój rozwiązań wspierających bankowość elektroniczną dla klientów korporacyjnych. Zakres obowiązków Tworzenie wysokiej jakości kodu. Projektowanie i dokumentowanie rozwiązań technicznych. Przeprowadzanie testów jednostkowych. Współpraca z Analitykami Biznesowymi, Architektami IT oraz innymi członkami zespołu projektowego. Współpraca z klientem biznesowym. Udział w przeglądach kodu (Code Review). Refaktoryzacja istniejących rozwiązań. Wsparcie techniczne mniej doświadczonych programistów oraz dzielenie się wiedzą w zespole. Udział w projektowaniu nowych rozwiązań systemowych. Wymagane kompetencje Minimum 5 lat doświadczenia zawodowego na stanowisku Java Developera. Wykształcenie wyższe kierunkowe (informatyka, matematyka lub kierunki pokrewne). Doświadczenie w tworzeniu aplikacji w technologii Java. Dobra lub bardzo dobra znajomość relacyjnych baz danych, w szczególności: pisania zapytań SQL, projektowania baz danych, tworzenia struktur danych (tabele, indeksy itp.), zagadnień związanych z transakcjami i blokadami bazodanowymi. Znajomość zagadnień integracyjnych opartych o: REST, JSON, SOAP Web Services, XML, XSD. Doświadczenie w przeglądach kodu (Code Review). Doświadczenie w refaktoryzacji kodu. Znajomość wzorców projektowych. Znajomość wzorców architektonicznych. Znajomość zagadnień związanych z aplikacjami rozproszonymi (Microservices). Doświadczenie w pracy z Jira i Confluence. Mile widziane Doświadczenie z Apache Kafka. Doświadczenie w projektowaniu rozwiązań z wykorzystaniem UML. Doświadczenie w pracy z Enterprise Architect.