AI Engineer

💻 Job Title: AI Engineer

💰 Salary: £80-130k, DOE

📍 Location: Soho (4 office days/week)

🌴 Benefits:

• Unlimited annual leave + remote working around holidays if you wish
• 8% employer pension contribution
• Comprehensive health insurance
• £1,000 L&D budget to use as you see fit

📊 Industry: B2B - AI Research - Synthetic Data

👥 Team: ~20

💸 Funding: Seed stage

This early-stage, well-funded start up is building advanced AI systems that model and simulate complex real-world behaviour at scale. Their platform enables organisations to test decisions, scenarios and strategies using large-scale AI-driven simulations, dramatically reducing time-to-insight compared to traditional approaches.

Following a strong early traction and funding injection, they're looking for 2x AI Engineers to join a small, highly technical team working at the intersection of large language models, agent systems and scalable backend infrastructure.

This is a senior hands-on role suited to engineers who want to work deeply with LLMs while also owning production-grade systems that run reliably at scale. You’ll work across agent cognition, memory, reasoning and orchestration, while ensuring the underlying platform is performant, cost-efficient and production-ready.

The role balances LLM / agent development with backend engineering, making it ideal for someone who enjoys experimentation and research-driven iteration, but also cares deeply about robust system design and real-world deployment.

✅ Must have requirements:

• Strong software engineering background in Python and backend frameworks (e.g. FastAPI, Flask, Django)
• Hands-on experience building LLM-powered applications, including agent frameworks, workflows and RAG systems
• Experience building workflows/agents on top of existing models
• Experience with relational databases and vector search / embedding systems
• Knowledge of cloud infrastructure, containerisation and deploying ML systems to production
• Experience working in fast-moving environments with evolving requirements

👍 Bonus points for:

• Degree in Computer Science, Maths, Physics, AI or related technical field
• Exposure to research-led product development or academic-style experimentation
• Familiarity with fine-tuning workflows, model optimisation and experiment tracking

🛂 Please note: these roles DO NOT offer VISA sponsorship, so you need to have the right to work in the UK.