AI Engineer III - Agentic AI

Salary: £55,000 - 90,000 per year

Requirements:

• Demonstrated experience within professional software engineering.
• Some hands-on experience building or contributing to AI-powered features, LLM-based applications, or applied ML systems, whether professional or project-based.
• Solid engineering fundamentals in at least one backend language: Python, Go, or TypeScript.
• Familiarity with APIs, basic cloud concepts, and modern development practices.
• Interest in agentic AI systems, autonomy, and AI-assisted development workflows.
• Willingness to learn, take feedback, and grow technical ownership over time.
• Comfort working in collaborative, cross-functional teams.
• A strong customer mindset and curiosity about real-world problem solving.
• Employment eligibility to work with us in the UK is required, as we will not pursue visa sponsorship for these positions.

Responsibilities:

• Contribute to the design and implementation of LLM-powered and agentic product features.
• Build and extend agentic AI workflows that reason over context, call tools, and perform actions under guidance from senior engineers.
• Help implement and maintain retrieval-augmented generation (RAG) pipelines over financial data, with an emphasis on correctness and safety.
• Contribute to shared AI infrastructure such as LLM services, orchestration components, and evaluation or monitoring tooling.
• Participate in operating AI systems in production, including monitoring, debugging, and improving reliability and performance.
• Collaborate closely with product and design partners, learning to translate customer needs into technical solutions.
• Write production code, contribute to system design discussions, and help operate what we build after launch with support and guidance from more senior engineers.

Technologies:

• Agentic AI
• AI
• Backend
• Cloud
• Support
• LLM
• Python
• RAG
• Security
• TypeScript
• AWS
• GCP
• REST

More:

We are American Express, and our Enterprise Technology Services organization partners with every part of our business to power growth and innovation with trust and efficiency. We support the delivery and operations of technology, digital, and data capabilities, platforms, and services globally, including technology engineering, architecture, infrastructure, product management for core enterprise platforms, technology risk and information security, enterprise data governance and platforms, digital product and design, and enterprise AI platforms. For this AI Engineer – Agentic AI role, we are building platforms, products, and governance that enable agentic AI systems to operate responsibly and at scale across the enterprise. This is a hybrid role based in London or Burgess Hill, West Sussex. We offer comprehensive support for holistic well-being, opportunities to learn new skills, develop as a leader, and grow your career within a culture built on innovation, shared values, leadership behaviors, and a strong commitment to customers, communities, and colleagues.

last updated 36 week of 2026