Product Engineer

About Marker: Marker is an AI-native Word Processor – a reimagining of traditional word processing tools, combining collaborative workflows with human-centered agentic AI editors. We are a small, early-stage company based in London, UK, built by experienced engineers, designers, and product people. Our mission is to empower serious writers by giving them writing superpowers through cutting-edge technology.

About The Role: We are seeking a Product Engineer to join our team in building the next-generation user interface for people who care about writing. This role involves building web user interfaces using React/Next.js and TypeScript, contributing to our real-time collaborative backend, defining and delivering features end-to-end, and being part of the early founding team to guide our products and company.

Responsibilities:

• Build web user interfaces using React/Next.js and TypeScript
• Contribute to our real-time collaborative backend (Cloudflare Workers, TypeScript, CRDTs, PostgreSQL)
• Define, architect, implement, and deliver features end-to-end, from conception to production
• Collaborate with designers and product managers to create intuitive user experiences
• Test and debug applications to ensure high quality and reliability
• Stay up-to-date with the latest web technologies and best practices

Requirements:

• Proven experience building products for the web using React
• Familiarity with TypeScript and modern JavaScript frameworks
• Understanding of collaborative real-time technologies (CRDTs, Y.js)
• User-focused product mindset with good design sensibilities
• Interest in generative AI technologies and willingness to learn

Preferred Qualifications:

• Experience with building advanced Rich Text Editing interfaces (ProseMirror, Tiptap)
• Experience with collaborative real-time technologies (CRDTs, Y.js, sync engines)
• Experience building production-grade local-first or offline-first applications
• Experience using LLMs in production, especially multi-agentic systems
• Strong interest in writing (fiction, non-fiction, essays)

Compensation: The estimated pay range for this role is £100,000 - £170,000, plus equity.

Location: Onsite/Hybrid in London, UK