Applied AI Engineer (LLM)

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This range is provided by Stealth AI Startup. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

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Fractional Talent Partner at Cult Mia, Housr, InvestorHub, Levellr & Trusted. Fuel Ventures Portfolio Talent Partner. Fixed-Fee & Subscription Model…

About us

We are a seed-stage AI start-up backed by leading European and US investors . Our founders have delivered cutting-edge AI at world-class research labs and high-growth technology companies. Now, operating in stealth, we apply next-generation agentic AI to overhaul mission-critical enterprise workflows that still depend on error-prone, manual processes.

Our vision is to bring these high-value operations into the modern era, making them quicker, safer and far more resilient through thoughtful, responsible deployment of generative AI, with ethics and safety embedded from day one.

Why this role is so exciting!

  • Help build the future of AI in a three-trillion-pound market, working with clean, well-structured data and small, highly skilled teams.
  • Tackle problems that keep society functioning, from ensuring essential medicines reach hospitals to securing critical services
  • Make a huge personal impact at an early stage, high-growth company where every line of code ships to production.
  • Work on cutting-edge agentic AI while learning directly from leaders in the field.

The opportunity

As an Applied AI Engineer you will own the most advanced piece of our product: autonomous, multi-agent language-model systems. Working side by side with the CTO, you will experiment with new models and frameworks, then turn discoveries into production-grade solutions for esteemed enterprise clients. You will architect and build data pipelines and APIs that feed terabytes of real-world data into our AI stack, and you will guide projects from whiteboard to customer training.

What you will do

  • Build and deploy agentic LLM workflows that automate supplier discovery, risk monitoring and cost analysis.
  • Lead projects end to end: architecture, modelling, coding, DevOps, rollout and customer enablement.
  • Design frameworks for safe and robust multi-agent collaboration, including conflict resolution and self-reflection loops.
  • Develop benchmarking suites that measure performance, safety and behaviour across domains.
  • Create tooling that connects language models to client systems such as ERP platforms and custom APIs.
  • Collaborate directly with executives and end users to refine requirements, demo prototypes and ensure delivered value.

What good looks like in this role

  • Exceptionally strong computer-science fundamentals and the ability to implement complex solutions efficiently.
  • At least two years of hands-on experience deploying large language models to production with robust evaluation, guard-railing and monitoring.
  • A Master’s degree in AI or Computer Science from a top-tier research university

Nice to have

  • Experience with multi-agent frameworks, retrieval-augmented generation or vector-search architectures.
  • Familiarity with large-scale, data-rich business domains such as operations, finance or analytics.

What we\'re offering:

  • Base salary from £130,000 - £140,000. .. plus meaningful equity in a company pre Series A.
  • We\'re a hybrid team - 3 days a week in the office (we believe in the power of in-person collaboration and learning by osmosis).
  • Private healthcare, pension scheme and an annual off-site to disconnect and recharge.
  • Visa sponsorship available for exceptional talent already eligible to work in the UK (must be based in the UK already)
  • An opportunity to define the engineering culture and leave your mark on technology that could reshape a vast, underserved market.

Interview Process:

  • Initial candidate screening (30 mins) : this first step is an opportunity for us to learn more about your goals, interests, and how they align with the role.
  • Design interview with the CTO (45 mins): in this step, we present you with real problems we encounter, and we ask you to design a solution in a whiteboarding exercise.
  • In-person interview (half-day, paid): for the final step, we invite you to come meet the team in-person and work alongside us! We find this is the best way for candidates to get a sense of what working here is like

Seniority level

  • Seniority level

    Mid-Senior level

Employment type

  • Employment type

    Full-time

Job function

  • Job function

    Information Technology

  • Industries

    Technology, Information and Internet

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#J-18808-Ljbffr Salary: GBP 104000 - 116000 per year Experience: 3 years required
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