Java Developer (Distributed Financial Systems)

Responsibilities

• Design and evolve robust distributed systems, balancing scalability, latency, consistency, and fault tolerance
• Develop and maintain high-performance backend services and APIs using Java, Spring, and Spring Boot
• Design reliable messaging and integration flows using JPA, JDBC templates, JMS, and event-driven patterns
• Integrate complex financial platforms and third-party services, ensuring correctness, data integrity, and operational resilience
• Apply distributed systems principles (e.g. consistency models, idempotency, back-pressure, resiliency patterns) to real-world financial workloads
• Optimize end-to-end latency, asynchronous processing, and efficient IO
• Identify and resolve performance bottlenecks through profiling, benchmarking, and load testing
• 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)

Requirements

• Solid experience as a softwae engineer with a focus on Java (Core Java, Collections, JSON, JDBC, Spring, Spring Boot)
• Very good knowledge in distributed systems, microservices, event-driven design, low-latency systems
• Very good knowledge in JPA, JDBC, relational databases, JMS, Unix/Linux and Bash scripting
• Very good understanding of OAuth2, API security, IAM concepts
• Good code review practices and pride in code quality
• Experience with cloud platforms, preferably Microsoft Azure
• Knowledge of containerization (Docker, Kubernetes), CI/CD pipelines and DevOps practices
• Exposure to API security, OAuth2, and related standards
• Fluency in English

Nice to have

• Previous experience in the financial industry is a plus
• Good German language skills

Personality

• Ability to work independently and take ownership of projects
• Excellent analytical and problem-solving skills
• Methodical and structural approach
• Strong communication skills
• Quick grasp of new topics
• Pragmatic and proactive approach