Software Testing Engineer

The future of rail isn't just about movement, it's about intelligence, security, and connection. We unite rail expertise with digital innovation to create smarter, safer, and more sustainable transportation solutions. Technology here speaks with purpose: accelerating digitalization, embedding cybersecurity, and shaping the next era of rail.

Behind every breakthrough are people, their talent, creativity, and drive to push boundaries. Together, we're building confidence, resilience, and a new standard for connected mobility powered by innovation.

This position is for Stadler Digital Labs, a joint venture between Stadler Rail and Critical Software serving as the digital competence center for the Stadler Group.

Check-out the website: https://stadlerdigitallabs.com

Could you be the Software Testing Engineer that we've been looking for?

Key Responsibilities:

• Review and analyze system and software requirements
• Design and implement automated tests in Python as well as manual tests
• Execute functional, integration, and regression tests in a simulated lab environment
• Evaluate test results and document test evidence according to safety standards (EN‑50716)
• Write test specification, record test results and write test reports
• Analyze and report defects, including initial root‑cause analysis
• Contribute to verification and validation activities
• Collaborate closely with system engineers, developers, safety experts, and V&V engineering
• Contribute to improvements of testing processes, tools, methods, and automation strategies
• Prepare for and participate in audits (e.g., updating processes according to standards)

Which brings us to you, the person with:

• Degree in Computer Science, Information Technology, Business Informatics, Engineering, or comparable professional experience.
• Professional experience in railway signalling systems such as CBTC, ERTMS, Conventional Interlocking, ATO, Collision Warning Systems
• Experience in software testing or system validation in safety‑critical or embedded systems (strict require-ment)
• Testing experience in systems with SIL 1–4 and good understanding of EN 50716:2023 (preferred)
• Experience in Python (strict requirement)
• ISTQB Foundation Level certificate (preferred)
• Interest in establishing new solutions and applying new technologies and methods
• Proactive mindset and strong team-player skills
• Fluent in English is mandatory; the German language is an advantage
• Demonstrates awareness of AI trends (including agentic AI), with curiosity and motivation to explore how they can enhance products, processes, or ways of working;
• Shows a learning mindset toward emerging technologies and an openness to experiment, adapt, and continuously upskill in an AI‑enabled environment.

What we provide:

• Work that fits your life, not the other way around
• Offices designed to make you feel like you belong
• A team that knows how to work hard, but also how to have fun
• Pay that makes you feel valued, plus performance-based rewards
• Your growth is our priority: training, support, and opportunities!

Join us and help us to improve the efficiency and sustainability of rail mobility.

Location: Hybrid in Coimbra or Lisbon.