Senior Java Back-End Developer – Financial Services Trading Platform

🏢 Summary: Hybrid Senior Java Backend Developer role in Krakow focused on building secure, scalable distributed microservices for modern banking messaging platforms. The role covers application design and development, quality standards, testing, automation, and technical mentoring within an Agile product team. 🗂️ Requirements: 5+ years of senior experience with Java, Spring Boot, and Kubernetes, Hands-on AWS cloud experience, CI/CD experience with GitHub, Jira, Jenkins, Maven, and Groovy, API design expertise: Swagger, OpenAPI 3.0, REST, JSON, microservices, OAuth 2.0 authentication and authorization experience, Kong API Gateway experience, TDD and Agile/Scrum development experience, Ability to translate business requirements into technical solutions, Communicative English proficiency, Legal right to work in Europe 📃 Skills: Java, Spring, Kubernetes, AWS, GitHub, Jira, Jenkins, Maven, Groovy, Swagger, OpenAPI, REST, JSON, Microservices, OAuth, Kong, TDD, Scrum 🏢 Description: Kick-start innovation in banking technology — develop scalable, secure, and high-performing microservices! Krakow-based opportunity with hybrid work model (up to 3 remote days per week). As a Senior Java Backend Developer – Cloud and Microservices Expertise , you will be working for our client, a leading financial institution dedicated to delivering state-of-the-art messaging solutions to enhance customer engagement. Your expertise will drive the design and development of distributed systems, supporting the modernization and standardization of critical messaging platforms. Join us and contribute to shaping the future of banking communication technology. Your main responsibilities: Applying your technical expertise to develop high-quality applications/systems in line with requirements and standards. Collaborating within a multi-disciplinary, Agile product team to design and build distributed microservices using modern technology stacks. Defining and maintaining technical quality standards across platforms. Building strong decision-making and problem-solving skills within your area of expertise. Producing efficient, maintainable code that aligns with business needs and technical dependencies. Conducting thorough unit testing to ensure software performance and reliability. Challenging code and design quality to uphold industry standards and project excellence. Contributing to automation test coverage and quality assurance processes. Maintaining effective communication with team members and stakeholders. Promoting innovative technologies and mentoring engineering colleagues. You’re ideal for this role if you have: Minimum of 5 years’ senior experience in Java, Spring Boot, and Kubernetes. Practical experience working with Cloud platforms, especially AWS. Strong knowledge of CI/CD tools such as GitHub, Jira, Jenkins, Maven, and Groovy. Expertise in API design standards: Swagger, OpenAPI 3.0, REST, JSON, Microservices architecture. Knowledge of authentication and authorization via OAuth 2.0, with experience using Kong API Gateway. Familiarity with Agile testing methodologies, particularly TDD, and extensive Agile/Scrum development experience. Ability to work closely with business stakeholders to translate functional requirements into robust technical solutions. Strong problem-solving capability with a focus on innovative, scalable solutions. It is a strong plus if you have: Experience with additional cloud services or certifications. Knowledge of DevOps practices beyond the core technologies listed. Language Required for the role: English – Communicative proficiency essential for effective collaboration and stakeholder engagement. Eligibility for the role: Only candidates with an existing legal right to work in Europe 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 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: Fully remote Senior Java Backend Engineer role for Poland-based developers building low-latency, high-throughput trading systems for equities, options and FX. The role focuses on algorithmic order management, order routing, real-time market data and performance-critical core Java development within a long-term bank project. 🗂️ Requirements: Current core Java development experience, Strong algorithms, complexity, multithreading and Java standard-library knowledge, Deep Java collections and data-structures knowledge, Backend front-office trading-system experience, Front-office workflow and electronic-trading-platform knowledge, Algorithmic order-management or order-routing experience, Event-driven systems and performance-tuning expertise, Low-latency trading-systems knowledge, Ability to work with a 6-hour overlap with US Eastern hours, English proficiency, Poland residency and legal authorization to work in Poland, Background-check clearance 📃 Skills: Java, Algorithms, Multithreading, Collections, Databases, Trading, OrderRouting, OrderManagement, PerformanceTuning, MarketData 🏢 Description: Want to work on trading systems at a top N. American Bank This isn’t just another dev role. It’s your chance to engineer the core of global trading. We’re talking ultra-low-latency architectures, real-time market data, and automation at scale — all in an environment where milliseconds matter and billions move. You’ll work on greenfield and semi-greenfield projects, building trading systems for equities, options, FX (forex), and more. If you thrive on complexity, love solving performance challenges under pressure, and want to collaborate directly with traders and product teams at the sharp edge of financial technology, this is your arena. The Role at a Glance Senior Java Backend Engineer Building trading systems, including high-performance backend services for algorithmic order management and order routing (multiple projects & various asset classes) Fully remote for a top N. American bank (for residents of Poland only) Part of the core team - this is not a legacy support role or an outsourced B team This role requires experience building trading systems, ideally with order routing or algorithmic order management. Some capital markets experience is required. If you enjoy working on low-latency, high-throughput trading systems, join us and build the next generation of high-performance capital markets solutions. Why Join Us? Work on a large-scale, low-latency trading system . No Legacy: Join an actively developed system — the engineers who built it originally are still on the team. Collaborate with a world-class team of developers across North America and Europe. Enjoy the stability of a long-term, fully remote role that only a bank can offer. A successful candidate will be a very strong programmer with current Java development experience. They must also be curious, open-minded, and desire to learn new things. English proficiency is a must. This role is for developers who excel at programming core Java from the ground up, not just integrating frameworks or APIs. If you’re fascinated by understanding systems ‘under the hood,’ this role is for you. Successful candidates enjoy geeking out about data structures and debugging application performance issues. This is a fully remote backend Java development role for a developer in Poland . You will be working through a Polish company that will provide the support and administrative assistance to make you successful in the role. We are looking for people to join the team long-term. Only open to residents of Poland. Polish citizens, as well as legal residents with permission to work in Poland, are welcome. What we offer Work that matters in the financial domain: You’ll be building a high-performance trading system at an established financial institution. Professional growth: Collaborate with smart, highly capable developers in a supportive and challenging environment. Direct collaboration : You will work directly with the client team in North America and in Poland. 1st-tier work : This is not a technical support or legacy maintenance role. The system is functional and is actively being built and you will take part in updating it. The people who built the system are still part of the team. Long-term commitment: This is not a fixed-scope or fixed-term outsourcing role; we value people who want to grow and contribute long-term. Flexibility & remote work: Fully remote position based in Poland with increasing schedule flexibility post-onboarding. Competitive Compensation: Top pay and ample time-off options. Responsibilities Design and implement robust software solutions for equities and FX trading systems using core Java. Build high-performance backend services that algorithmically manage and route orders. Create thorough test cases to ensure software stability and reliability. Collaborate with operations teams regarding building new features and improving existing functionality. Requirements Must have Current Java programming experience, with a strong understanding of programming concepts, including algorithms, complexity, and multi-threading, and Java’s language capabilities and standard libraries. Good knowledge of the data structures: familiarity with the Java collections framework, depth of understanding of the commonly used data structures, intuition on what to use when. Proven experience building backend services for front-office trading systems. Deep understanding of front-office workflows and electronic trading platforms (any asset class). Built or contributed to the algorithmic order management systems or order routing systems (any asset class). Expertise in multi-threading, event-driven systems, and performance tuning. Ability to break down complex workflows into maintainable, high-quality solutions. Strong communication skills and comfort working in high-stakes, trader-facing environments. Knowledge that is required for building low-latency (measured in microseconds) trading systems. Ability to align your work with a 6-hour overlap with US Eastern business hours. Nice to have Exposure to time-series databases and market data integration. Familiarity with algorithmic workflows and pricing engines. A computer science degree from a top Polish school. The recruitment process Submit your CV. Answer a few written questions and a short programming exercise which you can do at your own pace. Participate in a three-stage interview process: Written screen Technical screen interview Three technical interviews with future team members Discuss your experience and skills. Solve verbal algorithm problems (focus on clarity and understanding). Tackle live coding challenges (no trick questions). No take-home assignments – we respect your time. Successful candidates will need to pass a standard background check.

🏢 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 focused on building and maintaining backend securities-settlement systems. The position uses event-driven architecture, container orchestration, CI/CD, monitoring, and AI-assisted development in a hybrid work model with up to three remote days per week. 🗂️ Requirements: 3+ years of Java software development experience, Proficiency in Java and Spring Boot, Hands-on Kafka experience, Experience with GitLab and SDLC tools, Understanding of Docker and Kubernetes, Communicative English, Legal right to work in the European Union 📃 Skills: Java, Spring, Kafka, GitLab, Docker, Kubernetes 🏢 Description: Unleash the Power of Modern Financial Systems — Drive Innovation in Securities Settlement Technology! Warsaw-based opportunity with hybrid work model (up to 3 remote days per week). As a Senior Java Developer , you will be working for our client, a leader in the securities and post-trade processing industry. You’ll contribute to building and maintaining cutting-edge settlement systems that enable reliable, secure, and efficient financial transactions. Join a collaborative environment where innovation and technology meet to transform the future of finance. Your main responsibilities: Develop and maintain Java-based backend services using Spring Boot to support securities settlement processes Work with Kafka to implement event-driven architectures for real-time data processing Deploy and manage applications utilizing Kubernetes and Argo CD for orchestration and automation Participate actively in CI/CD pipelines using GitLab to ensure reliable and continuous delivery Monitor system performance and health through Prometheus, Grafana, and the Elastic Stack Leverage AI tools like GitHub Copilot, Devin, and Claude to improve code quality and team productivity You’re ideal for this role if you have: Minimum 3 years of experience in software development, specifically with Java Strong proficiency in Java programming and Spring Boot framework Hands-on experience with Kafka and SDLC tools such as GitLab Solid understanding of containerization and orchestration technologies (Docker, Kubernetes) Experience with deploying and managing cloud applications, ideally on AWS (nice to have) Knowledge of securities settlements and post-trade processing (preferred) Familiarity with AI tools like Devin and Claude (preferred) Excellent problem-solving skills and attention to detail Strong communication skills and ability to work collaboratively in a team It is a strong plus if you have: Experience with AWS cloud platform Knowledge of securities settlement and post-trade systems Hands-on experience with Argo CDF Certifications or familiarity with AI-driven development tools Language Required for the role: English – Communicative level 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.