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Capco

Lead AI Engineer

Capco is hiring a Lead AI Engineer in London, United Kingdom. Level rates it ; you can apply on Capco.

Level's read on this job

  • Builds AI ●●●● is how Level rates this AI engineer role: the job is building AI systems.
  • The posting mentions LangChain, LlamaIndex and prompt engineering among its tools and skills.
  • Level classes it as a lead role.
  • Capco has 702 other open roles on Level.

AI in this role

langchainllamaindex
prompt-engineeringragai-agentsml-ops

Lead AI Engineer (Senior/Principal Consultant)
Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: Permanent

Empower the next frontier of AI with Capco. Shape, build, and deliver future-ready generative systems.

The Role
We’re looking for a Lead AI Engineer (Senior/Principal Consultant) to join our Technology Delivery Team. You’ll combine your expertise in AI/ML engineering and software development to build and deploy cutting-edge generative AI and agentic systems across the financial services sector. As a hands-on leader, you’ll architect AI solutions, embed them within enterprise environments, and drive impactful outcomes through advanced engineering, scalable pipelines, and deep cross-functional collaboration.

What You’ll Do

  • Architect and develop autonomous AI systems integrating multi-modal LLMs (text, image, audio, video)

  • Design agentic workflows enabling AI agents to interact with data sources and APIs using prompt engineering and RAG

  • Fine-tune, optimize, and deploy large language and multi-modal models with a focus on performance and latency

  • Build scalable MLOps pipelines and full-stack applications to support robust, production-grade AI deployments

  • Guide multidisciplinary teams and clients through strategic decisions in AI engineering and GenAI adoption

What We’re Looking For

  • Bachelor’s degree or higher in Computer Science, AI, or related STEM fields

  • Hands-on experience deploying LLMs and multi-modal models at scale

  • Strong engineering background in Python with proven backend and API development skills

  • Solid understanding of scalable MLOps, observability, and cloud-native AI deployment

  • Excellent communication, problem-solving, and project management skills in agile environments

Bonus Points For

  • Experience with agentic frameworks (e.g., LangChain, LlamaIndex)

  • Experience in deep learning frameworks and front-end development

  • Familiarity with Langfuse, Langsmith, or other LLM observability tools

  • Understanding of Model Context Protocol and bias/hallucination mitigation techniques

  • Previous success in integrating GenAI solutions into enterprise-scale systems

Why Join Capco

  • Deliver high-impact technology solutions for Tier 1 financial institutions

  • Work in a collaborative, flat, and entrepreneurial consulting culture

  • Access continuous learning, training, and industry certifications

  • Be part of a team shaping the future of digital financial services

  • Help shape the future of digital transformation across FS & Energy.

Benefits
We offer a competitive, people-first benefits package designed to support every aspect of your life:

  • Core Benefits: Discretionary bonus, competitive pension, health insurance, life insurance and critical illness cover.
  • Mental Health: Easy access to CareFirst, Unmind, Aviva consultations, and in-house first aiders.
  • Family-Friendly: Maternity, adoption, shared parental leave, plus paid leave for sickness, pregnancy loss, fertility treatment, menopause, and bereavement.
  • Family Care: 8 complimentary backup care sessions for emergency childcare or elder care.
  • Holiday Flexibility: 5 weeks of annual leave with the option to buy or sell holiday days based on your needs.
  • Continuous Learning: Your growth, your way - minimum 40 Hours of Training Annually. Take your pick; workshops, certifications, e-learning. Also, Business Coach assigned from Day One: Get one-on-one guidance to fast-track your goals and accelerate your development.
  • Healthcare Access: Convenient online GP services.
  • Extra Perks: Gympass (Wellhub), travel insurance, Tastecard, season ticket loans, Cycle to Work, and dental insurance.

Inclusion at Capco
We’re committed to making our recruitment process accessible and straightforward for everyone. If you need any adjustments at any stage, just let us know - we’ll be happy to help. We value each person’s unique perspective and contribution. At Capco, we believe that being yourself is your greatest strength. Our #BeYourselfAtWork culture encourages individuality and collaboration – a mindset that shapes how we work with clients and each other every day.

#LI-DNI

How we rate this

Lead AI Engineer at Capco rates 94 out of 100 for how much of the daily work is AI. That makes it Builds AI (AI Level 4 of 4). The level is about AI in the job, not seniority.

Classification

Builds AI. The job is building AI systems.

  1. ●●●● Builds AI80 to 100
  2. ●●●○ Works on AI60 to 79
  3. ●●○○ Uses AI40 to 59
  4. ●○○○ Little AI0 to 39

Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.

Prepare for this job

Built from this posting and from similar jobs on Level.

Skills and AI tools this role asks for

Prompt engineeringRAGAI agentsML OpsLangChainLlamaIndex

Also common in AI engineer jobs at this level

Pay

Typical AI engineer job
$184k

This posting doesn't list pay. Use the typical AI engineer figure when pay comes up. See AI engineer jobs

Questions you could be asked

  1. How do you structure and test a prompt to get consistent output from a language model?
  2. How would you design a retrieval step so the model answers from real data instead of guessing?
  3. How do you decide when an AI agent can act on its own versus asking for approval first?
  4. How do you monitor a model once it's live, and how do you know it needs retraining?
  5. Walk me through how you've used LangChain in your day-to-day work.

Adapt your resume

  • List these exact terms on your resume: Prompt engineering, RAG, AI agents, ML Ops, and LangChain. An applicant tracking system matches the wording, not the idea.
  • Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.
  • Lead with what you built, trained or shipped. This role is judged on the AI system itself, not the tools around it.

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