System Engineer (IoT Infra, Network & Server)

Location: City of London (EC1) - onsite

Rate: Rate as per experience Inside IR35

Level: L2 to early L3

A hands on systems engineering role supporting enterprise IoT deployments alongside broader infrastructure work. This is not a Windows admin or L1 support position-the client needs L2 to early L3 depth across devices, networks, servers, and SaaS platforms.

You'll be involved in device configuration, patch testing, rollout activities, and troubleshooting across a mixed environment that includes IoT systems (building management, lighting, occupancy, air quality), Windows and Linux servers, and cloud/SaaS platforms.

What You'll Be Doing

• Supporting and implementing enterprise IoT/OT device infrastructure - config, maintenance, patching, troubleshooting
• Translating architectural designs and requirements into operational implementations
• Performing patch testing, deployments, and device validation
• Troubleshooting complex issues across device, network, server, and platform layers
• Managing migration, refurbishment, and new IoT platform rollout projects
• Writing and maintaining runbooks, technical documentation, and operational guides
• Ensuring compliance with enterprise security standards - auth, authorisation, encryption
• Working with vendors and stakeholders to implement and future proof systems

What We Need

• Windows and Linux server administration
• IoT/OT device configuration, troubleshooting, and support across multiple platforms
• SaaS platform experience, including SAML and OIDC
• Security fundamentals: authentication, authorisation, encryption
• Strong documentation skills - clear, maintainable, and auditable
• Comfortable in a high security, production enterprise environment