Senior Infrastructure Architect

Contract type:
(TfL, Permanent)

Salary:
£78,000-£85,000 dependent on skills, knowledge & experience. Including excellent benefits such as free travel across TfL services, Final Salary Pension and 30 days annual leave.

Location:
North Greenwich, London - Hybrid Working 50% Office attendance model

Application closing date
: Sunday 7th December 2025 at 2359

UK Sponsorship Available
, although candidates are responsible for their own application fees.

Build a thriving, future-forward city with us
As a Senior Infrastructure Architect in the Hosting and Infrastructure Architecture team at TfL you'll be at the heart of major projects and programmes of work that continually improve the travel experience in London. Recent examples of major initiatives the team have been involved in are enhancing Cyber Security, delivering transformations to our customer facing services like Revenue Collection, End User Computing, and internal systems that keep our business running, such as a complete re-platforming of systems that keep our fleets moving across the London Underground, Elizabeth Line and Surface transport. You will develop new solutions in Public and Private Cloud to Deliver these and many more key initiatives.

What You'll Be Doing
You'll be responsible for the end-to-end lifecycle of specific infrastructure products – from conceptualisation and business case development, right the way through to shaping achievable strategies and roadmaps.

You'll be supported by the Project Manager, Business Analyst, Development Solution Architecture and Test Teams to explore high and low-level designs, before seeing your infrastructure successfully deployed and put into operation. You will also work in partnership with third-party suppliers, seeing to it that their proposed solutions meet business and technical requirements.

Knowledge And Experience
We are looking for someone with expert knowledge across of at least 3 of the following infrastructure technologies:

• Virtualisation platforms (e.g. Azure Local, VMware, Hyper-V)
• Hyper Converged Infrastructure and Virtual Storage Attached Networking
• Cloud platforms, including their features and capabilities with providers such as Azure and AWS
• Networking and connectivity (e.g. TCP/IP, DNS, VPNs, proxies, load balancing)
• Enterprise Operating Systems and Databases (e.g. Windows Server, RedHat Enterprise Linux, Oracle DBEE, SQL Server)
• It would be advantageous that you can also demonstrate knowledge of the following:
• Enterprise Security (e.g. IDS/IPS, Encryption, PKI)
• Microsoft 365 platforms, concepts and architecture including: Exchange Online, Teams, SharePoint, EntraID
• Additional network technologies (e.g. firewalls, switching and routing) and network architecture
• Managing contractual issues in a project environment
• Project management tools and techniques
• Certification in an Enterprise Architecture Framework such as TOGAF

The ideal candidate would also be educated to degree level or possess relevant professional experience.

In Addition To Being Skilled In

• Strong infrastructure architecture skills in architecting technology components across software, infrastructure and networks.
• Ability to take a loose set of requirements and build a high-level architecture using common standards. Refining the architecture as more information is discovered, decisions identified, and choices are made.
• Proven ability to analyse complex components, identify decision points, draw conclusions and produce design artefacts.
• Ability to communicate effectively, both orally and in writing, with people within a broad group of stakeholders including project managers, business analysts, developers, engineers and testers.
• Experience of designing and delivering systems using industry standard frameworks and open standards.
• Ability to work independently and as part of a team.
• Delivery focused with the ability to effectively prioritise tasks in a high-pressure environment to drive activities forward and meet demanding deadlines.

Excellent Benefits Include
Final salary pension scheme

Free travel for you on the TfL network

Reimbursement of 75% of the cost of a standard class Ticket for National Rail travel from home or 75% reimbursement on a 28-day flexi ticket

30 days annual leave plus public and bank holidays

TfL is committed to work-life balance, operating a hybrid working approach where business and role requirements allow

Private healthcare discounted scheme (optional)

Tax-efficient cycle-to-work programme

Retail, health, leisure and travel offers

Discounted Eurostar travel

Additional Information
Please apply supplying your CV preferably in ".docx" format. This document should be A4, in Arial 12 font, and a maximum of 2 pages per document.

If you are shortlisted you may be invited to take part in a Video interview. We endeavour to give candidates as much notice as possible however some interviews/ assessments will be organised at short notice and will require a degree of flexibility. We reserve the right to close the application window early if we receive a high volume of suitable applications.

Equality, diversity and inclusion
We are committed to equality, diversity and inclusion. We want to represent the city we serve, which will help us become a more innovative and efficient organisation. Our goal is to make our recruitment as inclusive as possible. We are a disability confident employer who guarantee an interview to any disabled candidate who meets all of the essential criteria. We also use anonymising software that removes identifying information from CVs and cover letters to make the process fair.

Many of our staff work flexibly in many different ways. Please talk to us at interview about the flexibility you need. We'll see what we can do.

We understand a confidence gap can get in the way of meeting spectacular candidates. So please don't hesitate to apply if you think you have what it takes even if you feel you don't meet all the criteria. We'd love to hear from you.