AI Platform Engineer

Barclays; Greater London; On-site; GBP 110,000 - 150,000; Full time

Job summary

Barclays in London is seeking an AI Platform Engineer to design and build core components of our enterprise AI infrastructure. You will own key platform subsystems, including the AI Gateway, inference routing, guardrails, and observability, delivering secure, scalable solutions aligned with our architectural vision.

This role blends platform architecture with hands-on engineering, enabling you to mentor junior engineers, drive technical delivery, and collaborate with security and product teams

Qualifications

• Experience designing cloud-native distributed systems for production use.
• Proficient in Python (FastAPI/asyncio) or Go/Java for building APIs/microservices.
• Hands-on experience with AWS/EKS, IAM, RDS/Aurora, scaling strategies and HPA.
• Experience with GenAI, RAG pipelines, LangChain or related toolchains.

Responsibilities

• Develop high-quality software with scalable, maintainable code optimized for performance.
• Collaborate with product managers, designers and engineers to define requirements and strategies.
• Conduct code reviews and promote a culture of code quality and knowledge sharing.
• Stay informed of industry trends and contribute to technology communities.
• Adhere to secure coding practices and implement robust unit testing.

Skills

Cloud-native systems design

Python/Go/Java

AWS & Kubernetes

GenAI integration

Tools

LangGraph & LangChain

Google ADK

Job description

Join Barclays as a AI Platform Engineer, where you will design and build core components of our enterprise AI infrastructure. You will own key platform subsystems, including the AI Gateway, inference routing, guardrails, and observability, delivering secure, scalable, and production-grade solutions aligned with our architectural vision. This role combines platform architecture with hands‑on engineering, enabling you to drive technical delivery while mentoring junior engineers.

Key Skills

• Cloud-native distributed systems — designing and owning platform subsystems end-to-end
• Extensive Python (FastAPI/asyncio) or Go/Java skills — building production APIs and microservices
• AWS and Kubernetes at scale — including EKS, Bedrock, IAM, RDS/Aurora, deployment strategies, and HPA
• GenAI and Agentic AI technologies — including LangGraph/LangChain or Google ADK, MCP/A2A, RAG pipelines, and LLM integration

Additional highly valued skills

• Envoy Proxy or API gateway platforms
• OPA/Rego policy-as-code
• AI safety controls, including guardrails, prompt injection defence, and content filtering
• Zero Trust and identity systems, including EntraID and OAuth2/OIDC

Location will be London

Purpose of the role

To design, develop and improve software, utilising various engineering methodologies, that provides business, platform, and technology capabilities for our customers and colleagues.

Accountabilities

• Development and delivery of high-quality software solutions by using industry aligned programming languages, frameworks, and tools. Ensuring that code is scalable, maintainable, and optimized for performance.
• Cross‑functional collaboration with product managers, designers, and other engineers to define software requirements, devise solution strategies, and ensure seamless integration and alignment with business objectives.
• Collaboration with peers, participate in code reviews, and promote a culture of code quality and knowledge sharing.
• Stay informed of industry technology trends and innovations and actively contribute to the organization’s technology communities to foster a culture of technical excellence and growth.
• Adherence to secure coding practices to mitigate vulnerabilities, protect sensitive data, and ensure secure software solutions.
• Implementation of effective unit testing practices to ensure proper code design, readability, and reliability.

Assistant Vice President Expectations

• To advise and influence decision making, contribute to policy development and take responsibility for operational effectiveness. Collaborate closely with other functions/ business divisions.
• Lead a team performing complex tasks, using well developed professional knowledge and skills to deliver on work that impacts the whole business function. Set objectives and coach employees in pursuit of those objectives, appraisal of performance relative to objectives and determination of reward outcomes
• If the position has leadership responsibilities, People Leaders are expected to demonstrate a clear set of leadership behaviours to create an environment for colleagues to thrive and deliver to a consistently excellent standard. The four LEAD behaviours are: L – Listen and be authentic, E – Energise and inspire, A – Align across the enterprise, D – Develop others.
• OR for an individual contributor, they will lead collaborative assignments and guide team members through structured assignments, identify the need for the inclusion of other areas of specialisation to complete assignments. They will identify new directions for assignments and/ or projects, identifying a combination of cross functional methodologies or practices to meet required outcomes.
• Consult on complex issues; providing advice to People Leaders to support the resolution of escalated issues.
• Identify ways to mitigate risk and developing new policies/procedures in support of the control and governance agenda.
• Take ownership for managing risk and strengthening controls in relation to the work done.
• Perform work that is closely related to that of other areas, which requires understanding of how areas coordinate and contribute to the achievement of the objectives of the organisation sub‑function.
• Collaborate with other areas of work, for business aligned support areas to keep up to speed with business activity and the business strategy.
• Engage in complex analysis of data from multiple sources of information, internal and external sources such as procedures and practises (in other areas, teams, companies, etc).to solve problems creatively and effectively.
• Communicate complex information. 'Complex' information could include sensitive information or information that is difficult to communicate because of its content or its audience.
• Influence or convince stakeholders to achieve outcomes.

All colleagues will be expected to demonstrate the Barclays Values of Respect, Integrity, Service, Excellence and Stewardship – our moral compass, helping us do what we believe is right. They will also be expected to demonstrate the Barclays Mindset – to Empower, Challenge and Drive – the operating manual for how we behave.