Principal AI Software Engineer

Job Description

Principal AI Engineer

Up to £110,000 + Bonus

Hybrid | London

We’re partnered with a global leader in loyalty and customer engagement, looking for a Principal AI Engineer to join their London team. This role will include delivering customer centric solutions and scale production-grade AI solutions. You’ll be the technical authority for AI engineering, driving architecture, automation, whilst ensuring our AI platform is robust and transparent. Working closely with the Head of AI Labs, you’ll lead the delivery of advanced AI systems that deliver real business impact.

Responsibilities as a Principal AI Engineer:

• Lead end‑to‑end delivery of scalable, resilient AI/ML pipelines aligned to business goals.
• Build and deploy advanced ML, DL, and LLM solutions, including RAG, agentic architectures, and evaluation frameworks.
• Mentor engineers in ML engineering, orchestration, and modern AI best practices.
• Communicate system behaviours, risks, and outcomes to both technical and non‑technical audiences.
• Partner with the Head of AI Labs to turn AI research and strategy into production‑ready solutions.

Key Requirements:

• Proven experience designing and productionising RAG pipelines and agentic AI architectures
• Hands‑on delivery of agent‑based AI systems with orchestration tools (e.g., LangChain, CrewAI) in production.
• Strong Python engineering skills with solid testing, optimisation, CI/CD, and code quality;
• Experience implementing and scaling vector databases (Pinecone, Weaviate, Milvus) for retrieval and reasoning workloads.
• Deep expertise in cloud‑native AI engineering on AWS, with Azure knowledge and ability to design distributed, fault‑tolerant systems.

Nice-to-Haves:

• TypeScript a plus; SQL proficiency for data work.
• Bridges technical and business teams with ease.
• Confident working with stakeholders at all levels.
• Shows initiative, works independently, and brings fresh ideas.
• Strong communicator able to present, guide, and influence effectively.

Benefits:

• Up to £110,000 + Bonus
• Flexible working options at a Central London office
• Private Health, Great pension
• Work from anywhere for 2 months of the year

This is an exciting opportunity for a Principal AI Engineer to take technical authority and deliver a real word impact on at a Global business, we’d love to hear from you.

**Unfortunately, due to high volume of applications, not all submissions will receive feedback