Principal Architect AI - Security

Client Server Limited; Greater London; Hybrid; GBP 100,000 - 120,000; Full time

Benefits offered by this job

Private Medical Care

Life Cover

Pension

Subsidised gym membership

Job summary

Client Server Limited is seeking a Principal Architect (AI Security) in London. You will own the AI strategy, design and build secure platforms, and influence across engineering, product and IT teams to pursue responsible AI adoption.

You’ll lead through technical expertise, shaping governance, risk and compliance while ensuring secure, scalable AI infrastructure and enabling long-term AI capabilities.

Qualifications

• Experience designing, building, securing and operating complex software platforms.
• Hands-on experience with Docker, Python, FastAPI, TypeScript and AI tooling such as MCP / FastMCP, OpenAI APIs and AWS Bedrock.
• Experience building or integrating AI gateways, agentic workflows or similar AI infrastructure.
• Enterprise or platform architecture at senior advisory level, in regulated or security-focused environments.
• Ability to design policy-based authorisation and secure-by-design controls.
• Ability to influence engineering, product, security and leadership stakeholders without formal management.
• DV clearance eligibility.

Responsibilities

• Lead AI architecture strategy and governance for secure AI adoption.
• Design and build AI platforms, services and infrastructure.
• Collaborate with engineering, product and IT teams to set architectural direction.
• Assess emerging technologies and test AI systems for vulnerabilities.
• Establish security boundaries around credentials, access and tool invocation.
• Advise leadership on opportunities and risks balancing innovation with business needs.

Skills

Software architecture

Docker containers

Python

FastAPI

TypeScript

OpenAI APIs

AWS Bedrock

AI gateways

Enterprise architecture

Policy-based authorization

Stakeholder influence

DV clearance eligibility

Tools

MCP / FastMCP

Job description

London, Greater London | £100k - £120k per year

Contact information

Ref: PR/101183_1794224436

Principal Architect (AI Security) to £120k

Do you have low level design and development skills combined with experience of integrating AI gateways, agentic workflow systems?

You could be progressing your career, in a senior, hands‑on role, working on cutting edge security / encryption products at a successful and expanding software house that provide cyber security products to a range of finance, government, defence, law enforcement and pharmaceutical companies.

As a Principal Architect, you'll take ownership of the organisation's approach to Artificial Intelligence, identifying opportunities to improve how the business builds, secures and operates its platforms. Working across engineering, product, customer facing operations and internal IT, you'll shape the AI strategy and turn it into practical solutions, designing and building the platforms, services and infrastructure needed to support responsible AI adoption.

This is a senior, hands‑on individual contributor role rather than a team management position. You'll lead through technical expertise and influence, working closely with engineers, technical architects and IT teams to set architectural direction and establish the policies, governance, risk and compliance frameworks needed to use AI securely and effectively. You'll advise leadership on opportunities and risks, balancing innovation with business needs, confidentiality and operational resilience.

On the engineering side, you'll design and build infrastructure for long‑running agentic workflows, including AI gateways and supporting services. Using technologies such as Docker, Linux, Python, FastAPI, TypeScript, MCP / FastMCP, OpenAI and AWS Bedrock, you'll develop reusable services and integrations, establishing secure boundaries around credentials, access, tool invocation and human oversight. You'll also assess emerging technologies before adoption, actively test AI systems and agentic workflows for vulnerabilities and work alongside engineers to investigate complex technical challenges. Your architectural decisions will help strengthen security, maintainability and assurance while shaping the organisation's long term AI capabilities.

Location / WFH:

You'll be primarily working from home but must be flexible to travel to client sites, mainly London and M4 corridor although sometimes further afield.

About you:

• You have experience in designing, building, securing and operating complex software platforms, Linux based systems, distributed services, APIs and integrations
• You have strong, current hands‑on experience with Docker / containerised environments, Python, FastAPI, TypeScript and AI specific tooling such as MCP / FastMCP, OpenAI APIs and AWS Bedrock
• You have practical experience of building or integrating AI gateways, agentic workflow systems or similar AI infrastructure; not just using AI tools but architecting the systems around them
• You have experience with enterprise or platform architecture at c‑suite advisory level, ideally spanning regulated, security conscious, or infrastructure heavy environments
• You can design policy based authorisation, credential / access boundaries and secure‑by‑design controls for systems handling sensitive operations
• You have experience of influencing engineering, product, security, customer‑facing and leadership stakeholders without relying on formal team management
• You must be eligible to achieve DV Clearance (i.e. British citizen or resident for a minimum of 10 years)

What's in it for you:

• Salary to £120k + OTE
• 25 days holiday, rising to 27 in two years, ability to buy 5 days per year
• Private Medical Care, Life Cover, Pension
• Subsidised gym membership