Join as the first technical hire at a high-growth startup where you'll own the product end-to-end. You will ship features in days, not weeks, directly impacting users who already show strong retention. This is an elite environment for a builder who wants to master AI integration and rapid 0→1 development.
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Cracked founding engineer (Fullstack) at BLEEP64
Are you a cracked engineer who lives to build and ship fast? BLEEP64 LTD is looking for their first technical hire to lead fullstack development for a VC-backed AI B2B SaaS. With a +60 NPS and strong PMF already established, this is a rare chance to join a de-risked startup at the ground floor. You'll own the architecture, ship AI-powered features, and work directly with founders in a high-intensity London office. If you're running out of Claude credits on your side projects and want to turn that energy into equity and impact, this is your next move.
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This role is no longer actively hiring, but Jack can still help you discover similar open roles that fit.
Location
London, United Kingdom
Compensation
Not Disclosed
Company
BLEEP64 LTD
Role overview
Software
BLEEP64 LTD is a private limited company incorporated on 17 December 2025, engaged in information technology consultancy activities (SIC code 62020). It is an active micro company with under 10 employees, located at 32-38 Leman Street, London, England, E1 8EW.
What you will do
- Own and ship new product features end-to-end across a modern React, Next.js, and Python FastAPI stack.
- Integrate and deploy advanced AI features using foundational models to solve real-world B2B vertical challenges.
- Collaborate directly with users to iterate on the product based on immediate feedback and data-driven insights.
Who this is a fit for
- A prolific builder with a portfolio of side projects or previous startup experience demonstrating a high shipping velocity.
- Proficient with TypeScript, React, Tailwind CSS, and Python, with a solid understanding of PostgreSQL and Supabase.
- A self-starter who thrives in "organized chaos" and is excited about grinding alongside a dedicated team to build a category-defining company.
Why this role is remarkable
- You will be the first technical hire, granting you unparalleled autonomy and ownership over core architectural decisions and product direction.
- The company is already de-risked with active pilots, a +60 NPS, and a distribution edge that ensures your work reaches users immediately.
- You will work directly with founders in a high-energy environment, gaining unique exposure to the fundraising process and the London tech scene.
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.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
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 your profile’s a match and BLEEP64 LTD wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.