Founding AI Engineer

This is not a research role. It’s a high-impact product engineering role in forward-deployed style where your work ships into production and is used by customers daily.

Your first 12 months at Upsolve AI will involve...

• Designing, prototyping, and deploying agentic LLM systems into production with real customer workloads.
• Running experiments to explore architectures, frameworks, and approaches - and driving product direction from their results.
• Building evaluation, observability, and improvement pipelines for agent quality and reliability.
• Integrating with our modern BI platform and customer-facing workflows.
• Establishing best practices for LLM/agent development, from tooling to performance monitoring.
• Embedding and collaborating directly with users and customers to validate what “good” looks like in production.

What you bring to Upsolve AI:

• 7+ years of engineering experience, including deep experience shipping production LLM systems.
• 2+ years track record of building agentic or multi-step reasoning systems that work in complex, real-world environments.
• Strong command of modern AI/LLM tooling (LangChain, Mastra, DSPy, vector DBs, eval frameworks, observability, OpenAI/Anthropic APIs, fine-tuning).
• Strong engineering ability (TypeScript preferred).
• Experience with databases, data warehouses, data systems, data connections, and big data engineering/analytics.
• Product mindset: ability to make opinionated calls, weigh trade-offs, and push for what delivers real customer value.
• Comfort working in an early-stage environment: high ownership, ambiguity, and rapid iteration.

What we value and what’s in it for you?

At Upsolve AI, we operate like a high-performance sports team. Hard work is required for success, but when we move together, we don’t just win games, we win championships. We despise bureaucracy and redundant process. Everyone here is a builder who rolls up their sleeves. We value ownership and trust: the person closest to the problem has the authority to solve it. We believe each team member brings a unique strength, and we shape our work to amplify those spikes.

In this role, you will get:

• Impact: This is a defining role. You’ll be shaping the core AI product that determines our product trajectory.
• Upside: Competitive salary plus founding-level equity.
• Culture: Low bureaucracy, high trust, and high ownership.
• Hybrid flexibility: Our office is in Shoreditch, and we prefer to work together face to face when possible because we believe that’s how magic happens. That said, we highly value flexibility and working from home one or two days a week is no problem.

Additional

• Salary range of £100k–140k / 1–3% equity (depending on experience and package).
• Opportunity to work with an elite team of entrepreneurs and engineers.
• Take-what-you-need holiday policy: startup life is intense, and we want you to have the agency to rest and recharge.
• Location: Central London office with flexible hybrid work.

A meeting lands on your calendar

If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.