Back-End Java Developer

(m/f/d)

Freelance/temporary employment for a project

Zurich

Start date: asap

Reference number: 880211/1

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