Join a high-growth startup as the first dedicated engineering hire, working directly with a technical co-founder to build agentic AI tools for the legal industry. You will translate ambiguous problems into high-impact product decisions, owning everything from multi-step background workflows to core AWS infrastructure while shaping the company's technical trajectory.
Back to all jobs
Find a job with Jack
This job is no longer actively hiring. Open Roles to see active jobs.
Founding Software Engineer at Crumb
Are you ready to be the first engineering hire at a startup reshaping the legal profession? We are looking for a Founding Software Engineer to build agentic AI tools that automate high-stakes legal workflows. Working directly with a technical co-founder, you will own the entire stack—from React and Node.js to AWS infrastructure—without a PM in your way. If you have strong product instincts, experience with complex async workflows, and a desire to build something that defines an industry's future, this is the highest-impact role you will find in London's AI scene.
About this role
Role overview
About the company
Crumb
Unlocking growth potential with strategic legal support delivered by expert Fractional General Counsels
What you'll do
What you will do
- Design and implement complex, multi-step asynchronous workflows and background jobs to automate legal review and contract analysis processes.
- Architect and maintain a robust AWS environment, ensuring the platform remains secure, scalable, and reliable as user adoption grows.
- Build and manage production-grade integrations using webhooks to connect the platform seamlessly with clients' existing enterprise toolsets.
Who you are
Who this is a fit for
- Extensive experience building and shipping production software using React, Node.js, and TypeScript with a focus on end-to-end system ownership.
- Proven ability to design multi-step workflows and handle complex third-party integrations and webhooks in a production-scale environment.
- Strong product intuition and a builder mentality, capable of making high-level product decisions without formal specifications or dedicated product management.
Why this role
Why this role is remarkable
- Founding engineer status as the first dedicated hire, providing immense influence over the product roadmap, architectural choices, and company culture from day one.
- Deep integration of agentic AI technology to solve real-world inefficiencies for lawyers, moving beyond simple wrappers into complex, multi-step workflow automation.
- High-autonomy environment with no project managers; you will work directly with legal experts to identify friction points and ship solutions immediately.
Jack & Jill
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.
Meet Jack
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.
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.