Staff Software Engineer

Senior Full Stack Engineer (AI) | London | £100k to £150k | React | Django | FastAPI
Location: London
This role is for Engineers who are intellectual and driven by deep complexity. This is about building tools that help people make sense of exceptionally complex systems.
You will work on internal software used to explore, analyse, and interact with advanced AI models. These tools are designed for technical users and require thoughtful engineering across both backend and frontend. The use case of this software is about tackling some of the most pressing challenges of the next generation.
If you enjoy owning problems end to end and care about both functionality and usability, this role offers real depth and the opportunity to be part of a mission driven team who are as competent as they are ambitious.
What you will be doing
Building and evolving full stack applications used by technical teams, using Django, FastAPI & React
Creating interfaces that help users understand complex behaviour and data
Working closely with others to shape how tools should work and feel
Balancing speed, quality, and adaptability in a fast changing environment
Taking responsibility for features from idea through to real world use
The stack centres on Python and modern frontend technologies, but curiosity and good judgement matter more than ticking boxes.
Who this suits
Full stack engineers who enjoy building serious internal tools and have 5 years+ experience
Those with experience working with LLM agents or a strong interest in this area
People comfortable working with evolving requirements
Engineers who care about good UX without needing to be designers
Those motivated by the broader implications of AI and its impact
This is a rare opportunity to build meaningful software in a high trust environment, alongside people who care deeply about doing things well.
If you’re looking for a role where you can make tangible impact, work on an interesting product, and be part of an exceptional team, get in touch at
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