Senior AI Engineer in London

Description

The Role

We're looking for a Senior AI Engineer to take Stakemate's use of AI from experiments to a real, production-grade capability.

Reporting to the CTO, you'll work with the business to find high-value AI opportunities, shape the platform and architecture, and take agents from a working POC to production - then set the governance and standards that keep all of it safe as we scale.

This is a role for someone who's done the hands-on building already and can help set the direction for how a whole company uses AI.

• Why Join Us
• You set the bar: from the first POC to the platform everyone else builds on.
• Direct senior leadership access: you'll help decide where AI goes next at Stakemate, not just work a backlog someone else wrote.
• Real production stakes: your agents run in a live betting product, not a slide deck.
• Scaleup energy: fast decisions with a relentless focus on the player experience
• About Stakemate

Founded in summer 2022, Stakemate is revolutionising sports betting by putting social features and seamless interfaces at the forefront.

We're a profitable startup that's grown over 15x in the last year, and we're just getting started.

Recognised by EGR as one of the most innovative startups in gaming, we're scaling fast and shaping the next generation of sports entertainment.

We've built a product that users genuinely love — with unlimited betting group chats, multi-game bet builders, and an experience designed for how people actually want to bet: together.

Revolut disrupted Barclays, Robinhood disrupted Etrade — Stakemate is executing in the same way to take on the traditional gaming sector.

Learn more at www. stakemate. com or download our app to see what we're building.

Requirements

• You Are
• AI-first by default: you reach for an agent or an automation before you reach for a hire or a manual process.
• Hands-on: you'd rather build the thing than write a strategy document about building the thing.
• Direct: you say when something is a bad idea, including when the bad idea is yours
• Comfortable being the expert: you can be the person everyone asks without becoming the bottleneck or the single point of knowledge.
• Must-have
• Demonstrable impact from agentic or LLM-powered systems you've shipped to real users, and you can explain what broke and what you changed.
• Hands-on with an agent framework (Lang Graph, Llama Index, Semantic Kernel, ADK or similar) and RAG in production: embedding models, vector stores, re-ranking, and knowing when a live query beats retrieval.
• Strong Python experience or similar, on a real engineering foundation: testing, version control, CI/CD, and the APIs that serve your own work.
• Hands-on with a major cloud and its managed AI services (Azure and AI Foundry, or the GCP/AWS equivalents), plus solid SQL and relational modelling.
• Architectural judgement: you make the design call, defend the trade-offs, and know where an LLM system needs optimising on cost, latency, and output that only sounds right.
• Strong product sense: you're data-driven, you understand what players actually need, and you think through the second and third order effects before you ship.
• Nice-to-have
• Proving an AI system behaves rather than trusting it: eval sets, output scoring, tracing, regression gates.
• Retrieval pipelines at volume: embedding at scale, index freshness, accuracy as the underlying data moves.
• Experience with workflows that survive contact with reality: timeouts, failed APIs, a human approving step.

What You'll Do

Be curious

• Sit with the teams who feel the pain, find where an agent would genuinely pay for itself, and get something in front of them quickly enough to learn whether you were right.
• Choose the approach and own the reasoning: low-code, pro-code, or something bought off the shelf, weighed on cost, control and how fast it can land.
• Get it done
• Turn the experiments that earn it into agents we're happy to put in front of players, tested and validated to the standard a live product demands.
• Design for the failure cases: a call that times out, a tool that errors, a job that runs for an hour, a decision the agent should hand back to a person.
• Build the shared frameworks, templates and infrastructure that let other engineers ship their own agents without starting from scratch.

Own it all the way

• Set the technical shape of our agent estate: how we retrieve, how we evaluate, how we constrain behaviour, how we see what's happening, and how any of it reaches production.
• Decide what needs sign-off before an agent goes live, how it handles player data, and where its authority stops.
• Leave a clear trail behind every agent: what it does, why we promoted it, what it costs, and whether the return still justifies it.

We before me

• Be Stakemate's AI champion: office hours, demos and short training sessions that make the wider team genuinely better at using AI.
• Partner with department leads on where AI helps, and where it doesn't.

Benefits

What We Offer

• Competitive salary reflective of the strategic importance of this role.
• Meaningful equity package: you're building something valuable, you should own a piece of it.
• Hybrid model Mon/Tue/Thu in our 79-81 Borough Rd office.
• Direct access to the senior leadership team and real strategic influence.
• Substantial opportunity for career growth as the company scales.