Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Design and build an AI-native writing editor that enhances creativity for serious writers.
- Company: Join a top 1% startup backed by leading investors like 8VC and Venrex.
- Benefits: Competitive salary, EMI options, and the chance to work in a high-ownership environment.
- Other info: Work with an elite team focused on quality interactions and innovative solutions.
- Why this job: Make a real impact on the future of writing with cutting-edge AI technology.
- Qualifications: Strong JavaScript skills and experience with text editing frameworks required.
The predicted salary is between 90000 - 130000 £ per year.
Salary: £90k-£130k + EMI Options
Company Description: $3M pre-seed AI writing platform backed by 8VC, Venrex, and Sequoia scouts
Location: London, UK
Job Description: 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.
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.
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.
The ideal candidate:
- 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.
Mid/Senior Product Engineer (£90k-£130k + EMI Options) at $3M pre-seed AI writing platform back[...] in London employer: Jack & Jill
Contact Detail:
Jack & Jill Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Mid/Senior Product Engineer (£90k-£130k + EMI Options) at $3M pre-seed AI writing platform back[...] in London
✨Tip Number 1
Network like a pro! Reach out to folks in the industry, attend meetups, and connect with people on LinkedIn. You never know who might have the inside scoop on job openings or can refer you directly.
✨Tip Number 2
Show off your skills! Create a portfolio that highlights your best work, especially projects related to AI writing tools or text editing frameworks. This will give potential employers a taste of what you can bring to the table.
✨Tip Number 3
Prepare for interviews by practising common questions and showcasing your problem-solving skills. Be ready to discuss how you would approach building features for a high-performance editor, just like the one they’re looking for.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining our elite team at this exciting startup.
We think you need these skills to ace Mid/Senior Product Engineer (£90k-£130k + EMI Options) at $3M pre-seed AI writing platform back[...] in London
Some tips for your application 🫡
Show Your Passion for Writing: When you're crafting your application, let your love for writing shine through. We want to see how you connect with the craft and why you're excited about building tools that enhance the writer's experience.
Highlight Relevant Experience: Make sure to showcase your experience with JavaScript and any text editing frameworks you've worked with. We’re looking for candidates who can demonstrate their skills in creating high-quality interactions, so don’t hold back!
Be Authentic: We value authenticity, so be yourself in your application. Share your unique perspective on how you can contribute to our mission of bridging human creativity and AI. This is your chance to stand out!
Apply Through Our Website: To make sure your application gets the attention it deserves, apply directly through our website. It’s the best way for us to keep track of your application and ensure it reaches the right people.
How to prepare for a job interview at Jack & Jill
✨Know Your Tech Inside Out
Make sure you’re well-versed in JavaScript fundamentals and familiar with text editing frameworks like ProseMirror or Tiptap. Brush up on local-first architecture and syncing, as these are crucial for the role. Being able to discuss your technical knowledge confidently will impress the interviewers.
✨Showcase Your Craftsmanship
Prepare examples of your previous work that highlight your attention to interaction quality. Discuss how you've designed user experiences that respect the writer's process, similar to what this company aims to achieve. This will demonstrate your alignment with their vision and values.
✨Understand the Company’s Mission
Research the startup’s background and its investors. Knowing about their previous successes and the unique approach they take towards AI writing tools will help you articulate why you want to be part of their journey. It shows genuine interest and can set you apart from other candidates.
✨Prepare Thoughtful Questions
Think of insightful questions to ask during the interview. Inquire about their vision for the product, the challenges they face, or how they measure success. This not only shows your enthusiasm but also helps you gauge if the company is the right fit for you.