Back-End Java Developer
(m/f/d)
Freelance/temporary employment for a project Zurich Start date: asap Reference number: /1
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Responsibilities
Design and evolve robust distributed systems, balancing scalability, latency, consistency, and fault tolerance Apply distributed systems principles ( 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 (, 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 
