Mid/Senior Product Engineer (£90,000-£130,000 + Equity) at Versey

Job Title:

Mid/Senior Product Engineer

Salary:

£90,000-£130,000 + Equity

Company Description:

Versey - $3m pre-seed AI startup backed by 8VC and Sequoia scouts

Job Description:

Join a high-craft team building the "Cursor for writing." You will develop a local-first, minimalist editor that serves as a thinking partner for serious writers. Using Next.js and LangGraph, you'll solve complex challenges in real-time AI collaboration, agent orchestration, and seamless syncing to empower journalists and researchers worldwide.

Location:

London, UK

Why this role is remarkable:

• Build a category-defining tool designed with 50+ professional writers and journalists to augment, not replace, human thought.
• Join an elite team recognized in Focal's 2024 top 1% of European startups, backed by Tier-1 investors like 8VC and Venrex.
• Work in a high-ownership environment with a founder who has two prior successful exits and a passion for high-craft engineering.

What you will do:

• Engineer a high-performance, local-first writing interface using TypeScript, Tailwind v4, and ProseMirror for an elite user experience.
• Architect sophisticated agentic workflows using LangGraph and modern reasoning models to create an integrated, context-aware AI writing partner.
• Collaborate directly with customers to define and ship end-to-end features, from inline AI suggestions to complex version tracking systems.

The ideal candidate:

• Professional experience building complex frontend applications with React/Next.js and a deep obsession with interaction quality and craft.
• Strong interest or experience in local-first architecture and integrating LLMs/agentic systems into production-ready software products.
• A generalist mindset with excellent product instincts who appreciates high-quality tools like Linear, Superhuman, or Notion.