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ISM Software Architect
Date: 29 Jul 2026
Location: Madrid, ES
Company: Alstom
At Alstom, we build what millions depend on daily - rail transportation systems that can’t afford to fail. We’re more than 80,000 people worldwide creating the industry’s most diverse portfolio: high-speed trains, metros, trams, signalling systems and digital mobility solutions.
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You’ll work alongside people who take ownership, collaborate across functions, and contribute to systems that keep cities moving every day.
Your role, your impact

Contribute to ISM specifications and architecture with Program Development Managers, Design Authority, and System Engineers
Define software requirements, including functional, operational, interface, performance, safety, and cybersecurity aspects
Ensure requirements are testable and traceable across the development lifecycle
Design software architecture, components, interfaces, and dynamic system behaviour
Validate technical solutions through simulations and prototypes
Lead technical decisions: tools, methodologies (e.g., UML), languages, coding standards
Support integration (software/software and hardware/software) and verification activities
Contribute to system validation, testing, and long-term maintenance
Monitor technology evolution and promote reusable solutions and standardization
Ensure application of internal processes and contribute to continuous improvement





You’ll work with multidisciplinary, international teams across engineering and product development - solving complex challenges in rail security and digital systems.
What you bring

Engineering degree
Strong programming experience in C# .NET
Knowledge of security systems (CCTV, streaming protocols, SIP, VoIP, Public Address, etc.)
Strong communication skills in English (written and spoken)
Ability to collaborate with distributed and cross-functional teams
Agile mindset with international orientation

How success is measured

Quality and robustness of software architecture and design
Compliance with requirements, standards, and processes
Effectiveness in collaboration and integration activitiesContribution to innovation, reuse, and continuous improvement

Alstom, a great place to grow

Enjoy stability, challenges and a long-term career in a future-proof industry
Collaborate with transversal teams and supportive colleagues
Contribute to innovative and impactful projects in rail cybersecurity and signalling
Work in an Agile and international environment
Develop your career across functions and countries
Access continuous learning and development opportunities
Benefit from a competitive compensation and social benefits package

Here, the systems you design move cities. When the train runs safely and efficiently, your work makes a real impact — and that legacy stays with you.
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📌 ISM Software Architect (Madrid)
🏢 Alstom Gruppe
📍 Madrid