You will build a high-performance, local-first writing editor designed as a thinking partner for serious writers. Working with a founder who has two prior exits, you'll bridge the gap between human creativity and AI agents. This role focuses on high-craft interactions, agentic workflows with LangGraph, and sophisticated text-editing interfaces.
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London, United Kingdom£90k-£130k + EMI Options
Mid/Senior Product Engineer at $3M pre-seed AI writing platform backed by 8VC and Sequoia scouts
We're building Cursor, but for writing. Join an elite London-based team recognized as one of the 100 hottest startups in Europe. Backed by $3M from heavyweights like 8VC, Venrex, and scouts from Sequoia and A16z, we are reinventing the editor for serious writers who value thinking over generic AI automation. As a Product Engineer, you will build a high-craft, local-first platform using Next.js and LangGraph, shipping features that define the future of human-AI collaboration. If you have deep product taste and love tools like Linear and Superhuman, this is your chance to shape the next great writing interface.
Overview
Role overview
Company
Versey
Software
$3M pre-seed AI writing platform backed by 8VC, Venrex, and Sequoia scouts
Responsibilities
What you will do
- Design and implement AI-native editor interactions including inline suggestions, version tracking, and structured agentic "Skills."
- Build and refine a high-performance local-first editor with live collaboration features between human users and autonomous AI agents.
- Orchestrate complex agentic workflows using LangGraph and modern reasoning models to help writers explore ideas and research more effectively.
Candidate profile
Who this is a fit for
- Possesses strong JavaScript fundamentals and a deep obsession with interaction quality found in tools like Linear, Notion, and Superhuman.
- Brings experience with text editing frameworks such as ProseMirror or Tiptap, alongside a solid understanding of local-first architecture and syncing.
- Demonstrates strong product instincts and the ability to ship features end-to-end, from initial idea to production-ready agentic systems.
What makes it remarkable
Why this role is remarkable
- Join a top 1% Focal European startup recognized as one of the 100 hottest startups by the Europa awards, backed by investors like 8VC (Asana) and Venrex (Revolut).
- Build "Cursor for writing," creating an AI-native tool that respects the writer's process rather than flattening their voice through generic automation.
- Work in a small, elite team of experienced generalists in a high-ownership environment where craft, taste, and interaction quality are the primary North Stars.
Jack & Jill
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Meet Jack
Jack gets to know what you're great at and what you want next, then searches 14 million jobs daily and introduces you directly to hiring managers.
How does this work?
Jack's an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack's network.
If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
Jack