London, United Kingdom | Posted on 04/13/2026
Infrastructure · Financial Services · City of London (EC1)
Location: City of London (EC1) — onsite
Rate: Rate as per experience · Inside IR35
Overview
You'll be joining the infrastructure team at a major global financial services firm, working hands-on across their full technology stack. The scope is broad — PoC and RFP/RFE initiatives, day-to-day operations, and support of live IoT systems including building management, lighting controls, occupancy monitoring, and air quality.
This isn't an narrow specialism role. You'll move between networking, server administration, automation scripting, and IoT/OT device support depending on what the day demands.
Responsibilities
- Leading and supporting infrastructure PoC, RFP, and RFE initiatives across diverse platforms
- Managing and troubleshooting network and security configurations — routers, switches, proxies, firewalls, DMZ, RBAC, Kerberos, SSO, LDAP, AD
- Server administration across Windows, Linux, Mac, and vendor ecosystems (CA, BMC, IBM DataPower)
- Writing and maintaining automation scripts in PowerShell, Python, Perl, or Shell
- Supporting, troubleshooting, and upgrading IoT/OT devices across Android, Windows, Linux, Unix, iOS
- Working with SecDesign teams to apply appropriate controls for integrated solutions
- Ensuring production systems stay compliant within the Hygiene programme
Qualifications
- Strong network and security background — you understand layers, configs, and authentication flows inside out
- Server administration across multiple OS and vendor ecosystems — platform-agnostic is the expectation
- Real scripting ability in PowerShell, Python, Perl, or Shell — production experience, not surface-level
- Experience supporting IoT/OT devices in enterprise environments
- Clear, confident communication and stakeholder management skills
- CI/CD pipeline and cloud technology exposure
Nice to Have
- CCNA, AWS, or Azure certifications
- Experience working in globally distributed teams
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