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 Managers, QA Engineers and wider technical teams.

Experience required

• 4+ years of professional software engineering experience, including ownership of production backend systems.
• Strong hands-on experience with Java and Spring Boot
• Experience designing and consuming RESTful APIs.
• Strong knowledge of relational databases, data modelling and SQL.
• Hands-on experience with JavaScript and React.
• Solid understanding of modern front-end development practices and component-based architectures.
• Experience with automated unit, integration and API testing.
• Experience with Git, code review and CI/CD practices.

Nice to have

• Experience with AWS and cloud-native applications.
• Experience with Docker and Kubernetes.
• Knowledge of microservice and modular monolith architectures.
• Experience with event-driven systems, Kafka or AWS SQS.
• Experience with MongoDB or other non-relational databases.
• Knowledge of observability, monitoring, alerting and incident response.

What’s on offer?

• €70,000–€90,000 gross annual base salary, depending on experience and technical knowledge.
• Bonus scheme.
• 25 days' holiday + your birthday off.
• Employee share option scheme.
• Flexible working and a hybrid working model – just 1 day per week on-site in Madrid and 4 days working from home.
• Flexible perks package.
• Opportunity to join an international business with teams across Spain and the UK.
• Diverse, inclusive and collaborative working environment.
• The opportunity to work on an innovative SaaS platform within the embedded finance/fintech space.

Apply now or get in touch for a confidential conversation.