Lead Architect

Job description

Req ID:514505 At Alstom, we understand transport networks and what moves people. From high-speed trains, metros, monorails, and trams, to turnkey systems, services, infrastructure, signalling and digital mobility, we offer our diverse customers the broadest portfolio in the industry. Every day, more than 80 000 colleagues lead the way to greener and smarter mobility worldwide, connecting cities as we reduce carbon and replace cars.

Architecture Definition & Governance

• Define and maintain the end-to-end software and infrastructure architecture for products based on an HCI platform (Hyper Converged Infrastructure )
• Specify architecture scope, interfaces, responsibilities, and constraints
• Ensure architectural consistency across virtualization, deployment, networking, and security domains

Platform & Virtualization Architecture

• Architect solutions supporting multiple hypervisors, including XCP-NG (Xen-based virtualization) and KVM-based platforms such as Harvester
• Define deployment models for Linux-based operating systems and application images
• Guide adaptations of deployment and orchestration tools to support these platforms
• Ensure scalability, availability, and maintainability of cluster architectures

Deployment & Tooling

• Define architectural requirements for deployment automation and lifecycle management
• Contribute to the evolution of deployment centers, pipelines, and tooling supporting cloud based platform use cases
• Promote reuse of existing tools, frameworks, and commercial or open-source solutions (COTS) where appropriate

Administration & Operability

• Identify and formalize administration use cases for virtualized environments (e.g., start/stop workloads, lifecycle operations, monitoring)
• Define architectural options for common administration across heterogeneous hypervisors
• Assess the feasibility of orchestration or overlay solutions enabling system-level startup and control Network & Infrastructure Sizing

Define network architecture principles, including

• o VLAN design o High-bandwidth requirements (e.g., 10G) o Avoidance of unnecessary network complexity Ensure alignment with system and infrastructure architecture constraints

Security & Compliance

• Ensure architecture compliance with secure boot and platform security principles
• Collaborate with cybersecurity stakeholders to validate system hardening and trust chains Integrate security considerations by design (defense-in-depth, least privilege, lifecycle security) Obsolescence & Sustainability
• Identify and assess technology obsolescence risks (e.g., hypervisor lifecycle evolution) Competencies & Skills § Strong knowledge of Linux systems and low-level OS concepts § Solid understanding of virtualization fundamentals (VM lifecycle,isolation, networking, storage) § Hands-on experience with Xen, KVM / Harvester, or equivalent hypervisor technologies § Understanding of Kubernetes and container concepts (clusters,workloads, lifecycle) § Ability to design hybrid VM/container architectures § Strong understanding of networking principles (VLANs,segmentation, multiple interfaces, latency considerations) § Awareness of security and isolation mechanisms in virtualized platforms, including secure boot concepts § Ability to work in multi-hypervisor environments and understand nested virtualization concepts § Experience with automation, deployment, or platform tooling (CI/CD, Infrastructure as Code, orchestration concepts) You don’t need to be a train enthusiast to thrive with us.

We guarantee that when you step onto one of our trains with your friends or family, you’ll be proud. If you’re up for the challenge, we’d love to hear from you! Important to note As a global business, we’re an equal-opportunity employer that celebrates diversity across the 63 countries we operate in. We’re committed to creating an inclusive workplace for everyone.