Senior API Developer - Java & Cloud Services

Expected, AWS, Fargate, Java, Kafka, Kubernetes/EKS, Maven, RDS, Redis, SoapUI, Spring Boot, Swagger/OpenAPI

Operating system, Windows, Linux

About the project, As a Senior API Developer – Java & Cloud Services, you will be working for our client, a leading financial institution dedicated to transforming digital banking. You will design, build, and optimize secure, scalable APIs that power their cutting-edge digital products and internal platforms, leveraging modern Java and cloud-native patterns to deliver impactful solutions swiftly and reliably. This role offers an excellent platform for technical growth and innovation in a dynamic financial environment.

Your responsibilities, Build and evolve high-performing, scalable APIs and backend services using Java, Spring Boot, and Maven (developed primarily in IntelliJ)., Collaborate with cross-functional teams, including engineers, product owners, architects, and testers, to deliver robust services aligned with business needs., Design APIs following industry standards (REST, GraphQL, SOAP), ensuring versioning, backward compatibility, and optimal consumer experience., Integrate with third-party and internal APIs, ensuring resilience, observability, and clear error handling., Develop and support event-driven services utilizing Kafka, managing topic design, schema evolution, and message reliability., Deploy cloud-ready services on AWS, including Kubernetes / EKS, Fargate, Redis, RDS, S3, Route 53, with consideration for deployment and runtime environments., Maintain product quality through automated testing, regular API testing, and troubleshooting live issues with a "you build it, you run it" approach., Produce comprehensive API documentation using OpenAPI/Swagger and supporting runbooks as necessary., Contribute to engineering standards around security, performance, maintainability, and continuous improvement.

At least 5 years of hands-on experience building APIs and backend services in Java., Strong expertise with Spring Boot and Maven., Solid understanding of backend architecture concepts including service design, data access, caching, and resilience., In-depth knowledge of API styles and integration patterns (REST, GraphQL, SOAP)., Experience working with API tooling such as Postman, Swagger UI / OpenAPI, SoapUI., Ability to work with data formats like JSON and XML., Proven troubleshooting skills to diagnose issues, fix defects, and enhance performance and reliability., Strong collaboration skills and ability to communicate technical decisions effectively.

Optional, Experience with event-driven architecture at scale (Kafka streams, schema registry, idempotency, exactly-once/at-least-once)., Familiarity with AWS services like Kubernetes/EKS, Fargate, Redis, RDS, S3, Route 53., Knowledge of CI/CD pipelines, observability tools (logging, metrics, tracing), and secure coding practices., Strong critical thinking and a pragmatic, delivery-focused mindset.

This is how we work, at the client's site, agile, scrum, kanban

This is how we work on a project, Continuous Deployment, Continuous Integration

What we offer, Stable and long-term cooperation with very good conditions., Enhance your skills and develop your expertise in the financial industry., Work on the most strategic projects available in the market., Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years., Participate in Social Events, training, and work in an international environment., Access to attractive Medical Package., Access to Multisport Program., Access to Pluralsight., Flexible hours.

Benefits, sharing the costs of sports activities, private medical care, remote work opportunities, flexible working time, fruits, integration events, corporate gym, saving & investment scheme, no dress code, coffee / tea, drinks, christmas gifts, birthday celebration, sharing the costs of a streaming platform subscription, access to +100 projects, access to Pluralsight

Recruitment stages, online interview, online interview

#GETREADY to meet with us!, ITDS Business Consultants is involved in many various, innovative and professional IT projects for international companies in the financial industry in Europe. We offer an environment for professional, ambitious, and driven people., , We would like to meet you. If you are interested please apply and attach your CV in English or Polish, including a statement that you agree to our processing and storing of your personal data.

ITDS’s Whistleblower Procedure, You can report violations in accordance with ITDS’s Whistleblower Procedure available here:

ITDS Polska Sp. z o.o., ITDS supports financial service providers to take the next steps., , We identify what’s possible, every day. Opportunities in the areas of technology, organization, and digitization., , We see where banks, insurers, payment companies, or fintech can go and how they can get there., , That’s why we want to stimulate you to ramp up your ambition. Forget what you perceive as restraints and step towards the new reality., , ITDS in Poland - Pure player in new Technologies & Financial Industry, +300 IT implementation professionals, +20 clients in the Banking, Insurance, Payment & Fintech Industry, , ITDS excels in digital strategy delivery and implementation of best-of-breed lending solutions. ITDS has delivered successful strategic projects throughout Europe since 1998. We combine the experience we’ve accumulated with in-depth knowledge of technologies, business processes, and EU legislation to unlock new business opportunities.

This is how we work,