Back-End Java Developer (m/f/d)
Responsibilities
- Design and evolve robust distributed systems, balancing scalability, latency, consistency, and fault tolerance
- Apply distributed systems principles (e.g. consistency models, idempotency, back-pressure, resiliency patterns) to real-world financial workloads
- Develop and maintain high-performance backend services and APIs using Java, Spring, and Spring Boot
- Optimize end-to-end latency, asynchronous processing, and efficient IO
- Identify and resolve performance bottlenecks through profiling, benchmarking, and load testing
- Integrate complex financial platforms and third-party services, ensuring correctness, data integrity, and operational resilience
- Design reliable messaging and integration flows using JPA, JDBC templates, JMS, and event-driven patterns
- Code Quality and Best Practices: Write clean, maintainable, and efficient code while adhering to industry best practices, including code reviews, testing, and CI/CD
- Apply financial-grade engineering principles (auditability, security, controlled change)
- Collaboration: Work closely with product managers, designers, and other stakeholders to gather requirements and translate them into technical specifications and deliverables
Profile
- Technical skills: Languages & Platforms: Java (Core Java, Collections, JSON, JDBC), Spring Framework, Spring Boot / Architecture: Distributed systems, microservices, event-driven design, low-latency systems / Databases & Messaging: JPA, JDBC, relational databases, JMS / Operating Systems: Unix/Linux, bash scripting / Security: OAuth2, API security, IAM concepts
- Good code review practices and pride in code quality
- Ability to work independently and take ownership of projects
- Willingness to collaborate in a global team with members in Zurich and Singapore
- Previous experience in the financial industry is a plus
- Experience with cloud platforms, preferably Microsoft Azure
- Knowledge of microservices architecture and containerization (e.g., Docker, Kubernetes)
- Familiarity with CI/CD pipelines and DevOps practices
- Exposure to API security, OAuth2, and related standards.
Benefits
- Long-term project in a world renowed bank
About Hays
IT is and always has been our core business that laid the foundation for Hays' success. We are the biggest privately owned IT recruitment agency in Germany and offer the best jobs for every career level – whether you are interested in vacancies in agile SMEs or international DAX groups. Hays masters the entire IT job spectrum, from support to software architecture or digitalisation – thanks to our broad portfolio, we have something for everyone. In the last decades, we were able to support numerous IT experts with choosing the right path for a successful career, positioning ourselves as their lifelong partner. Our highly specialised consultants can cater to your every wish and expectation and will prepare you for interviews and contract negotiations. Give it a try and learn what the market has to offer – our services are free of charge, non-binding and discreet! We look forward to hearing from you.
Staffing process for freelance specialists
- Analysis of qualifications
- Telephone or personal interview
- Contact with customers
- Contract with Hays
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1. Analysis of qualifications
We carry out a detailed analysis of your technical qualifications on the basis of your CV, your application documents and your profile.
Contact at Hays
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