Full Stack Software Engineer (Java/Kotlin & React) (f/m/d)

Your area of work

Powering Europe’s energy transition in real time: join our core engineering team shaping the M7 XBID platform, the mission-critical system enabling pan-European cross-zonal intraday power trading. In this Full Stack Developer role, you will bridge back-end and front-end architectures to build, evolve, and scale a high-performance trading engine handling live operations across the continent. Working alongside skilled engineers in an agile setting, you will solve complex distributed computing challenges, steer architectural decisions, and make a measurable impact on European energy infrastructure every single day.

Your responsibilities

• Take end-to-end ownership of new features from initial design and technical proof of concept to production rollout.
• Build resilient, high-throughput back-end microservices using Java 17+ or Kotlin on top of the Spring ecosystem.
• Craft responsive, reliable, and intuitive user interfaces using modern web standards and React.
• Implement low-latency REST APIs, WebSocket streaming, and event-driven communication protocols across distributed components.
• Design efficient relational data models in PostgreSQL, optimize persistence layers, and ensure smooth data pipelines.
• Troubleshoot intricate issues across distributed environments while safeguarding system reliability, performance, and security.
• Contribute actively to technical discussions, architectural roadmaps, code reviews, and continuous delivery improvements.

Your profile

• Solid track record in full-stack software development spanning enterprise back-end architectures and modern web front ends.
• Strong programming proficiency in Java 17+ and/or Kotlin, complemented by practical experience with Spring and Hibernate.
• Hands-on familiarity with modern JavaScript, CSS, HTML, and client-side component libraries, ideally React.
• Solid understanding of relational database design, SQL optimization (ideally PostgreSQL), and distributed messaging patterns.
• Rigorous approach to clean code, testing, Git workflows, and agile collaboration in multidisciplinary engineering squads.
• Strong analytical reasoning, self-reliance in technical problem-solving, and continuous appetite for mastering emerging technologies.
• Helpful bonus assets include exposure to Protobuf, gRPC, RabbitMQ, WebSockets, Docker, CI/CD pipelines, or high-throughput financial and energy trading environments.