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.More than a job: a missionWe’re looking for an ISM Software ArchitectYou’ll work alongside people who take ownership, collaborate across functions, and contribute to systems that keep cities moving every day.Your role, your impactContribute to ISM specifications and architecture with Program Development Managers, Design Authority, and System EngineersDefine software requirements, including functional, operational, interface, performance, safety, and cybersecurity aspectsEnsure requirements are testable and traceable across the development lifecycleDesign software architecture, components, interfaces, and dynamic system behaviourValidate technical solutions through simulations and prototypesLead technical decisions: tools, methodologies (e.g., UML), languages, coding standardsSupport integration (software/software and hardware/software) and verification activitiesContribute to system validation, testing, and long‑term maintenanceMonitor technology evolution and promote reusable solutions and standardizationEnsure application of internal processes and contribute to continuous improvementYou’ll work with multidisciplinary,



international teams across engineering and product development - solving complex challenges in rail security and digital systems.What you bringStrong programming experience in C# .NETKnowledge 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 teamsAgile mindset with international orientationHow success is measuredQuality and robustness of software architecture and designCompliance with requirements, standards, and processesEffectiveness in collaboration and integration activitiesContribution to innovation, reuse, and continuous improvementAlstom, a great place to growEnjoy stability, challenges and a long-term career in a future‑proof industryCollaborate with transversal teams and supportive colleaguesContribute to innovative and impactful projects in rail cybersecurity and signallingWork in an Agile and international environmentDevelop your career across functions and countriesAccess continuous learning and development opportunitiesBenefit from a competitive compensation and social benefits packageHere, 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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📌 Software Architect (Madrid)
🏢 Alstom
📍 Madrid