Are you passionate about Quality, Software, Innovation, and Connectivity?
Are you excited about the latest cutting-edge technologies and eager to drive their future development?
If you are, then Jember can offer you a challenging, exciting, and rewarding role in a highly innovative, ambitious and progressive company.

Jember Spain is looking for offices in Madrid, Valencia, and Malaga, a Senior Software Engineer to own the design and delivery of features and components within one of our engineering teams. Working across our JVM-based, event-driven platform, you will frame problems, produce and maintain system designs, and take your work from refinement through to production and post-release.

YOUR TASKS AND RESPONSIBILITIES:
You will be responsible for:
• Owning the system design of your team's components
• Delivering production-ready and well-tested code
• Managing your own delivery: estimation, sequencing, raising delivery risks, owning the operability of what you ship, including monitoring reliability and taking part in on-call.




• You will work full-stack where the role calls for it and use AI-assisted tooling (Claude Code) as a genuine part of your daily workflow.

YOUR QUALIFICATIONS & COMPETENCIES:
• 4+ years of professional software engineering experience, with clear evidence of owning features and components end to end within a team
• Solid foundation in the JVM (Java / Kotlin)
• Frontend experience (React, TypeScript, Node.js) is a strong plus. We work full-stack, and we expect engineers to pick up frontend work quickly where the role calls for it.
• Production experience with event-driven systems; hands-on experience with Kafka is a strong plus
• Comfortable applying common patterns (event-driven, API gateways) and a developing sense of when not to
• Sound database judgment with relational (PostgreSQL) and non-relational stores, including data modelling and query performance
• Effective use of AI coding tools in your daily workflow. We use Claude Code; exp

📌 Senior Software Engineer (Madrid)
🏢 Jember Engineering Solutions
📍 Madrid