Join Humaans as a Senior Full Stack Engineer to build "Athena," an agentic AI layer automating people operations. Working directly with the founders in London, you will own features from ideation to launch across a modern TypeScript stack. Help us redefine how fast-growing companies like Poolside and Quantexa manage complex global workflows.
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Senior Software Engineer at Humaans
Humaans is building the future of workplace orchestration, and they are looking for a Senior Full Stack Engineer to join their London team. Backed by $20M from Y Combinator and the founders of Slack, Figma, and Shopify, Humaans is replacing legacy HRIS with an intelligent AI layer called Athena. You will work across a modern TypeScript stack (React/Node) to automate complex people operations for high-growth companies like Poolside and Quantexa. If you want to join a small, high-bar team where engineers influence product direction and solve hard infrastructure problems in a wide-open category, this is it.
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Location
London, United Kingdom
Compensation
£80k-£100k + Equity
Company
Humaans
Role overview
Software
Humaans is a next-generation, AI-powered HRIS (Human Resources Information System) designed for high-performing, globally distributed teams. The platform automates the full employment lifecycle—including onboarding, offboarding, promotions, and compensation management—through flexible data models, deep integrations, and fast APIs. Humaans aims to remove manual HR work, reduce compliance risks, and enrich employee experience by acting as a central hub for employee data and streamlining HR-related workflows, enabling companies to scale efficiently while maintaining enterprise-grade security and compliance.
What you will do
- Build and ship end-to-end features using TypeScript, React, and Node.js while contributing to technical architecture and infrastructure on Kubernetes.
- Collaborate directly with the CEO and Head of Engineering to shape product definition, discover customer needs, and expand the third-party integration marketplace.
- Own the full software lifecycle, from scoping and technical planning to implementation, bug fixes, and supporting sales/marketing efforts.
Who this is a fit for
- Extensive professional experience building full-stack web applications, ideally within a high-growth SaaS environment, with a deep appreciation for digital craftsmanship.
- Expert-level proficiency in TypeScript and Node.js, with the ability to navigate complex backend systems and frontend React components with ease.
- Proven track record of taking ownership of ambiguous problems and collaborating effectively with product teams to deliver tangible value to end-users.
Why this role is remarkable
- Work on a highly differentiated AI platform that uses a structured workforce data model to make automation reliable for HR, IT, and Finance.
- Join a company backed by $20M from elite investors, including Y Combinator and the founders of Slack, Figma, and Shopify, in a category that is currently wide open.
- Enjoy a high-autonomy product culture where engineers influence the roadmap, collaborate with designers, and solve complex orchestration problems for high-growth global teams.
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 Humaans wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.