Senior Python Engineer - Contract - Outside IR35
Mindera
Senior AI Engineer
We are hiring a Senior AI Engineer to join a team responsible for recommendation systems across web and mobile, working on a key AI-driven product, the AI Stylist.
This is a production-focused role. The AI Stylist is already live to customers and expected to scale significantly, with a large backlog of enhancements and increasing demand.
This is a hybrid position where 3 days per week are expected onsite in central London.
About the Role
You will join the Recommendations team, contributing to the AI Stylist experience, an AI-powered product that combines conversational interfaces with recommendation capabilities.
The work sits at the intersection of engineering and AI, focused on improving relevance, quality, and reliability in a live, customer-facing system.
You will collaborate closely with engineers, data scientists, and product stakeholders to evolve the system and support its rapid growth.
What You'll Be Doing
• Building and evolving AI-powered services using Python
• Designing and implementing evaluation frameworks for LLM-based systems
• Improving output quality through structured evals rather than purely code changes
• Applying techniques such as LLM-as-a-Judge to assess response and recommendation quality
• Working with non-deterministic systems and iterating based on real-world behaviour
• Integrating AI services into a broader platform and API ecosystem
• Contributing to production readiness including reliability, observability, and performance
• Partnering with data scientists on prompts, model usage, and evaluation strategies