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Jack & Jill

Full-Stack Engineer (Equity Only) at Rebase

Jack & Jill · United States

  • On site
  • Full-time
  • United States
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About the role

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.

She will pick the best candidates from Jack's network.

The next step is to speak to Jack.

Job Title

Full-Stack Engineer

Salary

Equity Only

Company Description

Rebase is building an AI Operating System for the enterprise, deploying autonomous agents that operate within complex, legacy environments—such as decades-old ERPs and homegrown databases—to automate work end-to-end.

Job Description

You will build the foundational infrastructure and interfaces for Rebase, an AI Operating System designed for complex enterprise environments. Working across the full TypeScript stack, you'll develop autonomous agents that operate within legacy systems while ensuring data remains secure and traceable. This is a high-impact, founding-level role focused on solving hard engineering challenges.

Location

USA or UK (Hybrid)

Why this role is remarkable

  • Work on a founding-level opportunity building "Private AI for Work," tackling the technical debt and legacy systems that modern AI tools usually cannot reach.
  • Join an ambitious team at the ground floor with significant ownership of the product roadmap and direct influence on company direction through heavy equity.
  • Build actual autonomous agent infrastructure that performs deep, traceable work in regulated environments, moving beyond simple AI wrappers to solve real-world enterprise problems.

What You Will Do

  • Develop and ship end-to-end features using TypeScript, React, Node.js, and PostgreSQL to support autonomous agent operations within customer infrastructure.
  • Architect and build secure APIs and interfaces that allow AI agents to interact with decades-old ERPs, homegrown databases, and regulated legacy systems.
  • Collaborate on AI infrastructure, implementing RAG pipelines and LLM integrations that prioritize fact-grounding and traceability for enterprise B2B customers.

The ideal candidate

  • Brings 3–5 years of experience shipping enterprise B2B products end-to-end, with a proven ability to manage complex UI, backend, and database architectures.
  • Possesses deep proficiency in the TypeScript ecosystem (React, Node.js) and PostgreSQL, ideally with experience in high-growth startups and Next.js or GraphQL.
  • Has hands-on experience building production-grade AI infrastructure, including autonomous agents or ML pipelines, rather than simple API wrappers.

Who are Jack & Jill?

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.

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.

How does this work?

  • 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 it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.

We never post fake jobs

This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.

Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.

We appreciate this can make them look a bit suspect, but there isn't much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.