Senior Backend AI Engineer

Senior Backend AI Engineer – Python | LLM Workflows

📍 Hybrid, London (1 day/week)

💵 £90,000-120,000 + equity

💻 Python, LLM workflows, AI orchestration, LangFuse

📈 AI SaaS platform – live with major enterprise clients

⚙️ Small, high-calibre engineering team – real ownership, AI-native product building

We're partnered with a fast-growing AI startup on a mission to help large organisations harness AI at scale. Their platform is already live with major enterprise clients across professional services, government and tech – and they're scaling quickly off the back of a recent Seed round backed by some of the UK's top investors.

They’re now looking to hire an Senior Backend AI Engineer. This is a backend-leaning engineer with hands-on experience building AI-powered products and chaining LLM-driven processes into production workflows. They want someone who understands how to turn LLM capability into reliable internal tooling, user-facing product features, and repeatable AI workflows.

The engineering team is small, sharp, and highly product-focused. Engineers work with real ownership and move quickly, with the chance to shape how AI systems are designed and deployed across the platform. The environment is genuinely AI-native, with strong internal adoption of AI tooling and a high bar for practical fluency.

You’ll be joining at an exciting point in the company’s growth: the product is already proven in market, but there’s still lots of room to influence architecture, workflow design, and how AI capabilities are embedded into the product over time.

Ideal profile:

• Strong backend engineering background, ideally using Python
• Experience building AI products or AI-powered internal tools in production
• Hands-on experience creating LLM workflows or chaining multi-step AI processes end-to-end
• Comfortable designing reliable backend systems around AI use cases, not just basic API integrations
• Experience with workflow/orchestration tooling (LangFuse exposure is a strong bonus)
• Also open to engineers who’ve built custom AI pipelines using other workflow engines or orchestration patterns
• Able to work in a product-minded way, translating AI capability into practical features and business value

Senior Backend AI Engineer – Python | LLM Workflows