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Founding Product Engineer @ cubic (YC X25)

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Hybrid (London)£70k - £120k + equityFull-timePosted 11mo ago

About the role

Founding Product Engineer role at cubic, an AI-powered code review platform, joining as the first product-focused engineer to work directly with founders to define and ship core features end-to-end.

Responsibilities

  • own features end-to-end—from ideation and development through to deployment, launch, and iteration
  • obsess over users and product outcomes to improve end-user experience
  • prototype quickly and adapt to new technologies as needed
  • work directly with founders and shape the product roadmap

Qualifications

  • 5+ years of software development experience
  • strong software engineering skills across a modern stack (Next.js, React, Prisma, Inngest, Supabase, Modal, Vercel AI SDK)
  • ability to own features end-to-end (from ideation to deployment)
  • self-starter with side projects and/or open source contributions
  • comfort with a fast-moving, multi-hat startup environment

Skills

Required:Software developmentNext.jsReactPrismaInngestSupabaseModalVercel AI SDKProduct management

Benefits

  • Not specified in the description
Last updated Sep 2, 2026. Interested? Apply on the company site.
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About cubic

AI-powered code review platform

Code review is a major bottleneck for software teams, and the rise of AI-generated code is making the problem worse. Reviewing large volumes of code slows devs down, and increases the chances of bugs slipping through. That's why we're building cubic: an intelligent code review platform that helps devs merge PRs 28% faster. How? - When you open a PR, cubic automatically reviews it. It learns from your codebase's patterns, points out bugs, suggesting fixes, and frees you from low-level review tasks. - You then jump into the cubic platform, which is designed to optimize how humans review code. For example, file changes are organized in a logical order instead of alphabetical, and cubic generates diagrams of architecture changes.

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