Senior Software Engineer – Madrid X3

Staff Software Engineer X1

? Madrid, Spain | Hybrid – 1 day per week on-site / 4 days working from home

? €65,000–€90,000 gross annual salary + bonus

We are working with a
fast-growing international SaaS and finance business
that is scaling its engineering team in Madrid.

As part of this growth, the company is looking to hire
3 Senior Software Engineers and 1 Staff Software Engineer
to join its expanding technology function.

This is an exciting opportunity to join an international engineering environment where you will work on a highly scalable SaaS platform, taking ownership of backend services and contributing to architecture, product development and technical improvements.

The role is hands-on and suited to an experienced engineer who combines strong
Java and Spring Boot
expertise with good engineering judgement, product thinking and a commitment to building secure, reliable and maintainable software.

Key responsibilities
- Design, build and maintain scalable services using
Java, Spring Boot




- Own features and services from technical design through deployment and production operation.
- Translate product requirements into pragmatic, maintainable technical solutions.
- Design REST APIs, data models and asynchronous integrations for a multi-tenant SaaS platform.
- Contribute to architectural decisions and constructively challenge proposals where risks or better alternatives are identified.
- Write clean, secure and well-tested code.
- Participate actively in code and design reviews.
- Improve platform reliability, performance, observability and maintainability.
- Diagnose production issues, identify root causes and implement lasting improvements.
- Help modernise existing services and manage technical debt.
- Use AI-assisted development tools responsibly to improve development, testing, documentation and problem-solving.
- Share knowledge and support the development of other engineers.
- Collaborate closely with Product

📌 Senior Software Engineer (Madrid)
🏢 Connect-AI
📍 Madrid