Join a high-performance team building Athena, an agentic AI layer redefining HR infrastructure. You will own features end-to-end across a modern TypeScript stack, moving beyond simple data management into intelligent orchestration. Working directly with the founders, you’ll solve complex problems for global customers like Poolside and Quantexa in a fast-scaling environment.
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London, United Kingdom£80k–£100k + Equity
Senior Software Engineer at Humaans - VC-backed AI workplace infrastructure
Humaans is redefining the operational layer of the workplace with Athena, a sophisticated AI orchestration platform. Backed by Y Combinator and the founders of Slack and Figma, they are seeking a Senior Full Stack Engineer in London to help build the next generation of HR infrastructure. If you're a TypeScript expert who wants to move beyond simple CRUD apps and into intelligent, agentic workflows using a modern stack (React, Node, K8s), this is your chance to join a $20M-funded startup at a pivotal moment. You'll work directly with founding engineers in a high-bar environment that rewards product ownership and technical excellence.
Overview
Role overview
Company
Humaans
Software
Humaans - YC-backed AI platform for workplace orchestration
Responsibilities
What you will do
- Develop and scale end-to-end features using TypeScript, React, Node.js, and Postgres, deployed via Kubernetes on Google Cloud Platform.
- Architect and expand a public REST API and real-time WebSocket infrastructure to support a growing marketplace of third-party integrations.
- Collaborate deeply with product and design teams to translate complex workforce data models into reliable, AI-driven automation workflows for global enterprises.
Candidate profile
Who this is a fit for
- Extensive industry experience in full-stack SaaS development with deep proficiency in Node.js and a strong appreciation for TypeScript.
- Proven track record of taking ownership of vague product problems and driving them to high-quality, customer-ready releases in a fast-paced startup.
- Strong product sense and design craftsmanship, with the ability to balance technical excellence with pragmatic business trade-offs and user impact.
What makes it remarkable
Why this role is remarkable
- Work at the forefront of the AI transition in HR tech, building a differentiated platform backed by $20M from the founders of Slack, Figma, and Shopify.
- High-leverage environment where engineers aren't just handed specs; you'll partner with the CEO and Head of Engineering to shape product strategy and technical architecture.
- Exceptional engineering culture with a 5-year equity exercise window, top-tier private healthcare, and a small, elite team that prioritizes quality and craftsmanship.
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 14 million jobs daily and introduces you directly to hiring managers.
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.
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