Platform Lead/System Architect

As Platform Lead / System Architect you own the architecture of the YouTrain platform: CMS/LMS, learning analytics, instructor portal, mission-planning services, APIs, and device management. You design a system that runs reliably and securely as a cloud solution as well as on-premise and in offline/edge environments at military customers - and you technically lead the platform engineers., * Make architecture decisions for cloud, on-premise, and offline/edge deployments (incl. synchronization and update strategies).

• Shape the security architecture: identity & access management, tenant isolation, audit logging, hardening.
• Provide technical leadership and mentoring for backend/platform engineers; code and design reviews.
• Design and standardize interfaces to XR clients, analytics, and device management (MDM).
• Establish operations concepts, scalability, observability, and SLOs together with the team.

• 8+ years of backend/platform engineering experience, including several years as an architect or tech lead.
• Deep experience with Kubernetes, containers, CI/CD, and infrastructure-as-code in production environments.
• Proven experience designing distributed systems (APIs, event streaming, data management, multi-tenancy).
• Solid security understanding (OAuth/OIDC, RBAC/ABAC, secrets management, zero-trust principles).
• Experience with on-premise or restricted-connectivity environments (offline/air-gapped) strongly preferred.
• Very good English; German a plus. EU/NATO citizenship required due to our customer environment.

Nice-to-haves

• Experience in defence/government or with certifications (e.g., BSI baseline protection).
• Experience with learning platforms (LMS), analytics pipelines, or MDM solutions.
• Experience with Unity/game backends or multiplayer infrastructure.

• Modern office in central Hamburg with a hybrid work model (office & home office) and a Deutschlandticket.
• International team with colleagues across Germany, Ukraine, and other locations.
• Startup environment with real ownership, flat hierarchies, and fast decisions.
• Competitive compensation aligned with experience and responsibility.
• Top equipment including the latest XR hardware.
• Individual learning and growth opportunities beyond your role.

YouTrain builds a military XR training platform for armed forces, law enforcement, and emergency responders. Our products - DronAR, TrainAR, BrothAR, ShootAR, DrivAR, and MissionAR - combine immersive environments with real equipment, enabling scalable training for drone operations, tactical shooting, emergency driving, and mission planning. Our customers and partners include the Bundeswehr, BWI, the Cyber Innovation Hub, and Quantum Systems. We are an international, fast-growing team headquartered in the heart of Hamburg - made for those who protect us.