Senior Python Backend Engineer (AI/LLMs)
Remote (United Kingdom) | Permanent | Flexible compensation (DOE), performance based bonus + equity

We're working with a well-established, tech-led business that is building a new AI product focused on handling real-world tasks, workflows and decision-making.

This is a small, high-calibre team building systems where AI capability is translated into reliable, structured product behaviour, with a strong emphasis on execution and consistency in real usage.

The product focuses on:

• Long-running workflows
• Persistent context
• Multi-step task execution
• Integration with external systems

The core challenge is designing systems that can apply model capability in a structured and reliable way, even when behaviour is non-deterministic.

The Role

This role sits in the Back End layer that connects models to the product.

The focus is on designing and operating systems that enable:

• AI workflows to run end-to-end
• APIs to serve AI features consistently
• Systems to perform reliably under real usage conditions

You'll be working on:

• Inference pipelines and orchestration layers
• Backend services for AI-driven workflows
• Performance considerations such as latency, throughput, batching and caching
• Monitoring, logging and production reliability

What They Care About

The hiring bar is centred around real production experience:

• Whether you have owned Back End systems end-to-end in production
• Your experience working with AI systems beyond simple integration
• Your exposure to practical challenges such as:
• latency and throughput optimisation
• monitoring and observability
• debugging and incident handling
• scaling systems in production environments

Tech Environment

• Python (primary Back End language)
• Node.js
• SQL/NoSQL databases
• LLM ecosystem (OpenAI, Anthropic, etc.)
• Docker and Kubernetes
• AWS, Azure or GCP is fine

Compensation

Flexible compensation assessed based on the candidates impact, ownership and ability to deliver in production environments, alongside equity and performance based bonus.