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Tech Stack
Tools & technologiesCloudGRPCJavaJUnitKafkaMockitoMongoDBMySQLOraclePostgresTCP/IP
About the role
Key responsibilities & impact- Developing, testing, and deploying core backend components of our Data Platform, with a focus on performance, reliability, and scalability.
- Designing and implementing network-layer solutions in Java, including HTTP tunnelling, TCP/IP communication, and Netty-based pipeline architectures.
- Building and maintaining load balancing strategies and understanding their role in distributed, high-availability systems.
- Designing integrations that combine cloud systems with on-premises data sources with a seamless operations experience.
- Contributing to technical designs and actively participating in code reviews to ensure clean, maintainable, and production-grade code.
- Actively integrating AI tools into your engineering workflow-using them to accelerate engineering, automate repetitive tasks, improve code quality, and explore solutions faster.
- Collaborating closely with QA and Product teams to deliver reliable, high-quality releases.
Requirements
What you’ll need- Around 3–6 years of experience in backend development, with strong hands-on skills in Java.
- Solid understanding of Java networking internals-including NIO, sockets, HTTP/HTTPS tunnelling, and proxy protocols.
- Practical experience with Netty or similar async networking frameworks (e.g.Vert.x, gRPC); ability to reason about event loops, channel pipelines, and non-blocking I/O.
- Knowledge of load balancing concepts - L4/L7 load balancing, connection pooling, health checks, and failover strategies.
- Strong debugging skills and a structured, solution-oriented mindset - particularly when dealing with 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 software.
- Hands-on experience with at least one database technology: PostgreSQL, Oracle, MSSQL, MySQL, or MongoDB.
- Good understanding of integration protocols: HTTP/HTTPS, REST, WebSocket, orgRPC.
- Confidence with concurrency and multithreading in Java-thread safety, executors, reactive patterns.
- Some exposure to asynchronous messaging systems (e.g.Kafka, AMQP, MQTT).
- A proactive attitude toward AI-augmented engineering-you actively use AI tools (LLM assistants, code generation, automation agents, etc.) to improve your own productivity and the quality of your output.
- Clear communication skills in English; sufficient German for everyday collaboration is a welcome plus, but not a requirement.
Benefits
Comp & perks- Opportunity to work flexibly from home
- Modern offices in Germany and the Netherlands
- A personal Learning & Development budget
- Up to 30 days of remote work per year from any EU country
- 2 additional paid days off on Christmas Eve and New Year's Eve
- Company Pension plan
- 30 vacation days a year
- Location-specific benefits packages (your recruiter will be happy to provide more details during your first chat)
- Company-sponsored business travel
ATS Keywords
✓ Tailor your resumeApplicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard Skills & Tools
JavaNIOsocketsHTTP tunnellingNettyload balancingtest automationPostgreSQLRESTconcurrency
Soft Skills
debuggingsolution-oriented mindsetclear communicationcollaboration