React Front End Developer - Contract 3 months UK
Satalia (NPComplete) · London, United Kingdom ·
- Seniority
- Lead
- Employment
- Contract
- Category
- Frontend
Satalia (NPComplete) · London, United Kingdom ·
A senior React frontend contractor joins Satalia's Solve team in London for a 3-month contract, building a real-time collaborative canvas where people and AI agents work on the same board. Day-to-day is hands-on React/TypeScript work on canvas rendering and performance, state management, SSE/WebSocket event handling, and multi-user collaboration with conflict recovery.
Role type: Contract Location: UK
Duration: 3 months
React Front End Developer required to join our Satalia team in UK
As an organisation, we push the boundaries of data science, optimisation and artificial intelligence to solve the most complex problems in the industry. Satalia, a WPP company is a community of individuals devoted to working on diverse and challenging projects, allowing you to flex your technical skills whilst working with a tight-knit team of high performing colleagues.
Led by our founder and WPP Chief AI Officer Daniel Hulme, Satalia's ambition is to become a decentralised organisation of the future. Today, this involves developing tools and processes to liberate and automate manual repetitive tasks, with a focus on freedom, transparency and trust. At the core of our thinking is an approach to wellbeing and inclusivity. We unpack human behaviour and unpick prejudice to ensure a safe and inviting environment. We offer truly flexible working and allow our employees to find the working practice that makes them most productive. At Satalia, your opinion matters and your achievements are celebrated.
Solve is a shared visual workspace where people and AI agents work on the same problem together. People define the problem, bring the context and steer the work. Agents research, plan and deliver. The work and the reasoning behind it stay on the board, visible to everyone.
The board is a real-time collaborative canvas, and it is the product. We are hiring a senior frontend engineer to build it with us. This is hands-on work on hard, concrete frontend problems: direct manipulation, streaming AI output, and several people editing the same board at once. Not a chat window around an API.
You will spend most of your time shipping code in the canvas and collaboration layer, working closely with the technical lead, who sets direction. We want your advice on how things should be built, and we will take it. We are not asking you to run a roadmap or a team.
Small senior team: technical lead, architect, QA, and you. Internal alpha today, funded, with a path to becoming its own venture. React and TypeScript frontend, Python and FastAPI behind it. Agents do a lot of the delivery work; people own the judgement. We prototype to learn, keep systems simple and legible, and treat specs, designs and tests as part of the product.
The project is a real-time collaborative canvas, and it is the product. We are hiring a senior frontend engineer to build it with us. This is hands-on work on hard, concrete frontend problems: direct manipulation, streaming AI output, and several people editing the same board at once. Not a chat window around an API.
You will work on:
Your first body of work is already defined. Two or more people, and the agents working for them, edit the same canvas at once and nobody loses work. No fork banner, no silent drop, no whole-board repaint. The design is decided and about 40% of the cards are done. What remains is the client side of it: the per-entity patch wire over the SSE stream, optimistic apply with resync on a missed event, the pending-edits queue that survives a reload, and closing out the remaining data-loss defects on the load, save-conflict and live-update paths. The interview questions come from this work.
We are not looking for someone who ticks every box. We are looking for someone who understands the core technology well, and who we would enjoy working with. In order of weight:
Satalia is home to some of the brightest minds in AI and if you're looking to join a company who not only values autonomy and freedom, but embraces a culture of inclusion and warmth, we'd love to hear from you.
We aim to respond to all applications within 2 weeks. If you have not heard from us within 2 weeks this means your application has been unsuccessful.
By applying to Satalia you are expressly giving your consent for the collection and use of your information as described within our Satalia Recruitment Privacy Policy.
Good luck!