Senior Software Engineer - Java

This position can be hybrid or stationary at our HQ in Tutzing (south of Munich) or in Amsterdam. We welcome applications from all qualified candidates, regardless of their gender identity. As we continuously expand and evolve our Data Platform, we are looking for a Senior Software Engineer m/f/x (specializing in Java and Networking) for our Engineering team. This team is responsible for the design, development, and evolution of our Data Platform, as well as our Data Network and related Data Products. We are looking for talented engineers with deep backend knowledge and a solid understanding of integration and transport layers. You will work closely with experienced engineers and contribute to the development of our platform's low-level network infrastructure, data transport, and scalability. We are a team that actively uses AI as a multiplier – not just in how we write code, but in how we rethink how we work. Ready to make a difference?

• Develop, test, and deploy central backend components of our Data Platform — with a focus on performance, reliability, and scalability.
• Design and implement network solutions in Java, including HTTP tunneling, TCP/IP communication, and Netty-based pipeline architectures.
• Build and maintain load balancing strategies, along with an understanding of their role in highly available distributed systems.
• Develop integrations that connect cloud systems with on-premise data sources — with a seamless user experience.
• Participate in technical designs and actively engage in code reviews to ensure clean, maintainable, and production-ready code.
• Proactively leverage AI tooling in your engineering workflow — to accelerate development, automate repetitive tasks, improve code quality, and find solutions faster. We are looking for curiosity and initiative here — not just using autocomplete.
• Collaborate closely with QA and Product to deliver robust and high-quality releases.
• Around 3-6 years of experience in backend development with deep hands-on Java knowledge.
• Solid understanding of Java networking internals — including NIO, sockets, HTTP/HTTPS tunneling, and proxy protocols.
• Hands-on experience with Netty or similar asynchronous networking frameworks (e.g., Vert.x, gRPC); ability to think in terms of event loops, channel pipelines, and non-blocking I/O.
• Familiarity with load balancing concepts — L4/L7 load balancing, connection pools, health checks, and failover strategies.
• Strong debugging skills and structured, solution-oriented thinking — especially when tackling low-level networking or concurrency issues.
• Solid experience with test automation (e.g., JUnit, Mockito, or similar frameworks) and a commitment to well-tested, maintainable code.
• Hands-on experience with at least one database technology: PostgreSQL, Oracle, MSSQL, MySQL, or MongoDB.
• Good understanding of integration protocols: HTTP/HTTPS, REST, WebSocket, or gRPC.
• Confident grasp of concurrency and multi-threading in Java — thread safety, executors, reactive patterns.
• Initial experience with asynchronous messaging systems (e.g., Kafka, AMQP, MQTT).
• Proactive attitude towards AI-driven engineering — you actively leverage AI tooling (LLM assistants, code generation, automation agents, etc.) to enhance your productivity and the quality of your work. You think about where AI can reduce friction in your workflow and bring that mindset to the team.
• Knowledge of TypeScript is a plus, but not required.
• Fluent in English; sufficient German knowledge for daily collaboration is welcome but also not required.
• Flexible work from home
• State-of-the-art offices in Germany and the Netherlands
• Personal budget for training and development
• Up to 30 days of remote work per year from any EU country
• Company pension scheme
• 30 days of vacation per year
• 2 additional paid days off on Christmas Eve and New Year's Eve
• Location-specific benefit packages (your recruiter will be happy to provide more details in the first interview)
• Company-sponsored business trips

For this position, we are open to specialists residing in Germany or the Netherlands. Whether you prefer to work from our offices in Tutzing or Amsterdam, or remotely from anywhere within these countries — we are happy to adapt to your preferred working style. If you are enthusiastic about this role but don't meet all the qualifications, please apply anyway! Lobster is an equal opportunity employer. We are committed to fostering a diverse and inclusive environment where empathy and mutual respect shape our collaboration.