Senior Python Engineer; AI​/ML

Senior Python Engineer wanted by a thriving production AI company who are seeing fantastic growth. They are seeking a senior python engineer / senior python developer with strong recent AI/ML development experience, to help build production-grade AI systems that power complex, real-world operations. This is not a research role: we’re looking for a capable software engineer who can design, build and ship scalable Python services that integrate advanced machine learning and LLM into live products used every day.

As a Senior Python Engineer, you’ll work at the intersection of backend engineering and applied AI. You’ll own systems end-to-end: from model training pipelines through to low-latency inference services, ensuring reliability, performance and clean architecture across the stack.

• Designing and building robust Python backend services (APIs, async systems, data pipelines)
• Integrating large language models (Claude, GPT-4 etc) into production applications
• Developing and maintaining LLM model training and evaluation workflows
• Optimising inference performance and improving latency
• Implementing monitoring, logging and resilience best practices
• Contributing to system architecture and mentoring other engineers

• 6+ years building production systems in Python, as a Senior Python Engineer
• Followed by strong recent experience (1-2 years+) integrating LLMs or advanced ML models into live products
  - production level hosting is required, not just local deployment
• Strong backend/API development experience, ideally with FastAPI
• Understanding of model training workflows and evaluation
• Comfortable with containerisation / Docker and CI/CD deployment
• Ability to write clean, tested, maintainable code

This is a high-impact opportunity for a Senior Python Engineer who enjoys building reliable systems as much as working with cutting-edge models. In return for your experience, the company offer a competitive salary between £90,000 and £110,000 per year, healthcare and medical benefits, and an excellent holiday allowance. They have a central London office and you would need to come in 1 day per week.