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AI Architecture Lead

London, United Kingdom

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Date live: 09/09/2026

Business Area: Cross Markets

Area of Expertise: Markets

Contract: Permanent

Reference Code: JR-0000131968

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Barclays Markets

A role in Markets involves trading financial instruments, such as bonds, stocks, and derivatives. You'll also arrange capital raisings, manage debt and equity issuances, and structure, execute, and syndicate transactions for clients.

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AI & Machine Learning

  • Experience deploying and operating machine learning models within enterprise environments.
  • Experience with LLM-powered applications, agent frameworks and retrieval systems.
  • Familiarity with prompt engineering, evaluation frameworks and AI safety controls.
  • Experience with reinforcement learning, fine-tuning or model customisation techniques.

Platform & Infrastructure

  • Experience with Kubernetes and containerised deployment models.
  • Experience managing or designing GPU-enabled environments.
  • Experience with distributed training and inference workloads.
  • Understanding of vector databases, model serving frameworks and AI infrastructure tooling.
  • Experience with cloud platforms such as Azure, AWS or GCP.

Markets & Quantitative Development

  • Prior experience in electronic trading, quantitative development or financial markets.
  • Experience integrating AI capabilities into business workflows and production systems.
  • Familiarity with modern C++ and Python-based quantitative environments.

Purpose of the role

To provide quantitative and analytical expertise to support trading strategies, risk management, and decision-making within the investment banking domain, applying quantitative analysis, mathematical modelling, and technology to optimise trading and investment opportunities. 

Accountabilities

  • AI Engineering & Platform Development

  • Design and develop shared AI platform capabilities used across Global Markets.
  • Build scalable infrastructure for machine learning and generative AI workloads.
  • Define architectures for model deployment, inference, orchestration and monitoring.
  • Develop reusable frameworks, APIs and services that accelerate AI delivery across multiple teams.
  • Evaluate emerging technologies and establish best practices for the adoption of AI at scale.

  • MLOps & LLMOps

  • Design and implement MLOps and LLMOps frameworks supporting the full model lifecycle.
  • Establish standards for model deployment, versioning, evaluation, monitoring and observability.
  • Improve reproducibility, governance and operational resilience of AI systems.
  • Define processes and tooling for prompt management, agent evaluation and model performance tracking.
  • Build automation that improves the speed and quality of AI development and deployment.

  • Cloud & Infrastructure

  • Design cloud-native architectures supporting AI applications and services.
  • Optimise utilisation of GPU infrastructure and specialised compute resources.
  • Partner with Technology teams on containerisation, orchestration and deployment strategies.
  • Improve scalability, reliability and cost efficiency of AI workloads.
  • Contribute to the evolution of the firm's AI platform and infrastructure strategy.

  • Essential Experience

  • Proven track record delivering large-scale engineering or AI platform initiatives.
  • Expert Python development skills.
  • Strong software engineering and architecture experience.
  • Experience building production machine learning or generative AI systems.
  • Excellent understanding of distributed systems, APIs and modern software architectures.
  • Experience working with cloud-native environments and container platforms.
  • Experience with CI/CD, automated testing, observability and production support.

Director Expectations

  • To manage a business function, providing significant input to function wide strategic initiatives. Contribute to and influence policy and procedures for the function and plan, manage and consult on multiple complex and critical strategic projects, which may be business wide..
  • They manage the direction of a large team or sub-function, leading other people managers and embedding a performance culture aligned to the values of the business. Or for an individual contributor, they lead organisation wide projects and act as deep technical expert and thought leader, identifying new ways of working and collaborating cross functionally. They will train, guide and coach less experienced specialists and provide information affecting long term profits, organisational risks and strategic decisions..
  • Provide expert advice to senior functional management and committees to influence decisions made outside of own function, offering significant input to function wide strategic initiatives.
  • Manage, coordinate and enable resourcing, budgeting and policy creation for a significant sub-function.
  • Escalates breaches of policies / procedure appropriately.
  • Foster and guide compliance, ensure regulations are observed that relevant processes in place to facilitate adherence.
  • Focus on the external environment, regulators, or advocacy groups to both monitor and influence on behalf of Barclays, when appropriate.
  • Demonstrate extensive knowledge of how the function integrates with the business division / Group to achieve the overall business objectives.
  • Maintain broad and comprehensive knowledge of industry theories and practices within own discipline alongside up-to-date relevant sector / functional knowledge, and insight into external market developments / initiatives.
  • Use interpretative thinking and advanced analytical skills to solve problems and design solutions in often complex/ sensitive situations.
  • Exercise management authority to make significant decisions and certain strategic decisions or recommendations within own area.
  • Negotiate with and influence stakeholders at a senior level both internally and externally.
  • Act as principal contact point for key clients and counterparts in other functions/ businesses divisions.
  • Mandated as a spokesperson for the function and business division.

All Senior 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.

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.

Barclays welcomes applications from all candidates and is committed to ensuring reasonable adjustments (accommodations) are put in place to allow for a fair and inclusive recruitment process. For more information and how to request one, please review Adjustments to the recruitment process.

We’re a global, vital and highly respected financial organisation with an inspiring Purpose. Operating in 39 countries and employing around 100,000 people across the world, we help communities, individuals and businesses thrive. And we’ve created financial solutions and technology that the world now takes for granted. A career with us can offer incredible variety, depth and breadth of experience, and the chance to learn from some of the best minds in technology and finance.

To find out more about Barclays' strategy please click here.

We are an equal opportunity employer and opposed to discrimination on any grounds. It is the policy of Barclays to ensure equal employment opportunity without discrimination or harassment on the basis of race, colour, creed, religion, national origin, alienage or citizenship status, age, sex, sexual orientation, gender identity or expression, marital or domestic/civil partnership status, disability, veteran status, genetic information, or any other basis protected by law.

Barclays is required by law to confirm that you have the Legal Right to Work in any role that you apply for. If you currently hold a work visa sponsored by Barclays, or you would require sponsorship from Barclays, you must declare this as part of your application. Sponsored visas are role and entity specific and any changes must be reviewed. It is important that you ensure you are working on the correct visa at all times. Failure to accurately disclose your visa status or Legal Right to Work may result in your application or any employment offer being withdrawn at any time.

This role may be subject to enhanced governance arrangements. If successful, you may be required to comply with additional regulatory and compliance obligations, such as disclosure of personal trading activities and external interest/affiliations.

Further information on these requirements will be provided at a later stage of the process.

This is Barclays London

Our global HQ is in Canary Wharf, at the heart of London’s financial district. There are over 10,000 colleagues here – a hugely diverse workforce made up of the world’s best financial and tech talent. If you love the buzz of city life, this is the place to be.

Cycle or run to work? We’ve got everything you need – from cycle hire and parking areas to new showering and changing facilities.

CoSpace is our drop-in co-working space, where networks are built, problems are solved collectively and our community is strengthened.

Our Wellness Suite includes a well-equipped gym and exercise studios, and provides personal training sessions and massage therapy.

Our new trading floors enhance communication, integrate sustainability, and support health and wellbeing through innovative design and British-sourced furniture.

This is Barclays London

Our global HQ is in Canary Wharf, at the heart of London’s financial district. There are over 10,000 colleagues here – a hugely diverse workforce made up of the world’s best financial and tech talent. If you love the buzz of city life, this is the place to be.

Supporting active commuters

Cycle or run to work? We’ve got everything you need – from cycle hire and parking areas to new showering and changing facilities.

Time to connect

CoSpace is our drop-in co-working space, where networks are built, problems are solved collectively and our community is strengthened.

Wellbeing in focus

Our Wellness Suite includes a well-equipped gym and exercise studios, and provides personal training sessions and massage therapy.

Advanced trading floors

Our new trading floors enhance communication, integrate sustainability, and support health and wellbeing through innovative design and British-sourced furniture.

Multicultural ERGs at Barclays

Be you. Be valued. Belong.

We celebrate the unique perspectives and experiences each individual brings, believing our differences make us stronger and drive success.

You can learn more about our commitment to our colleague on our Inclusion and Opportunities page.

Learn more

Application Process

Your application

We’ll ask for information about you, your CV and cover letter.

1

Your assessment

Covering your behaviours and ability at work.

2

Your interview

Exploring your past experiences and skills.

3

Next step

We’ll request additional information so that you can complete our screening process

4
How to ApplyRead our FAQ's
Barclays

Working flexibly

We’re committed to providing a supportive and inclusive culture and environment for you to work in. This environment recognises and supports your personal needs, alongside the professional needs of our business. If you'd like to explore flexible working arrangements, please discuss this with the hiring manager. Your request will be reviewed in-line with the requirements of the role/business needs of the team.

Hybrid working

We have a structured approach to hybrid working, where colleagues work at an onsite location on fixed, ‘anchor’, days, as set by the business area. Please discuss the working pattern requirements for the role you are applying for with the hiring manager. Please note that working arrangements may be subject to change on reasonable notice to ensure we meet the needs of our business.

Barclays is built on an international scale.

Our geographic reach, our wide variety of functions, businesses, roles and locations reflect the rich diversity of our worldwide customer base. All of which means we offer incredible variety, depth and breadth of experience.
And the chance to learn from a globally diverse mix of colleagues, including some of the very best minds in banking, finance, technology and business. Throughout, we’ll encourage you to embrace mobility, exploring every part of our operations as you build your career.

Find more information

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