Senior Software Engineer (Full Stack)

Humaans
LondonPosted 7 April 2026

Job Description

Senior Software Engineer (Full Stack) ABOUT US Humaans is building the next generation of infrastructure for the workplace; software designed for companies that are scaling fast, operating globally, and pushing into new boundaries. What started as a system of record has evolved into a broader platform for operating people globally. With Athena, our agentic AI layer, Humaans moves beyond data management into intelligent orchestration, connecting workflows across HR, IT, Finance, and Operations so organisations can act faster and with greater confidence, redefining how work gets done. We work with ambitious teams across Europe and the US, from AI-native companies like Lovable, Poolside, Fyxer AI, and Tandem Health, to established, high-growth organisations scaling internationally and through acquisition, including Quantexa, Sellpy, Manychat, Gigs, Croud, and Threecolts. These teams don’t buy software for features,they buy leverage. The ability to run faster, cleaner, and with more control as complexity compounds. To date, we’ve raised $20m in venture funding from some of the most respected founders, operators, and funds in technology: Lachy Groom (Physical Intelligence), Stewart Butterfield (Slack), Tobias Lütke (Shopify), Dylan Field (Figma), Jeff Weiner (LinkedIn), Claire Johnson (Stripe), Oliver Jay (OpenAI), Jay Simmons (Bond) as well as Y Combinator, Moonfire, Frontline Ventures, Pathlight Ventures, and Exor. If you have massive ambition and want to work on a hard problem, with a small team that moves fast, at a moment when the category is genuinely up for grabs - this is it. OUR TECH STACK Our tech stack today consists of TypeScript, JavaScript, React, Node, Postgres and Redis. We use GitHub for code and continuous integration to deploy to Kubernetes on Google Cloud Platform. We have a public REST API and our browser client uses a realtime WebSocket API. We obsess over details and quality of the user facing features and their implementation. Yet we move fast by creating focus and leveraging high quality foundations. YOUR DAY TO DAY - Help us shape the product from definition to release - Build end to end features, fix bugs, improve infra, support customers - Write backend TypeScript in Node, Postgres, Redis, Kubernetes - Write frontend TypeScript in React - Expand our 3rd party integration marketplace - Contribute to our technical architecture planning - Support sales and marketing teams SKILLS - Multiple years of industry experience in a full stack web app development role (ideally in SaaS) - Great knowledge of TypeScript and an appreciation for the language - Appreciation for design and digital product craftsmanship - Experience collaborating directly with product teams and designers, and a proven track record of delivering value to customers or users This is an in-person role. Our GTM team comes together in the office Monday through Thursday, while most of the team collaborates in person on Mondays, Tuesdays, and Thursdays. PACKAGE & BENEFITS Early stage startups can be messy – we know that. We're putting effort in providing you with the best employee experience and a quality driven environment in exchange for trusting us. - Market-leading compensation that reflects your value - 25 days paid time off each year plus public holidays - Share Options with 5-year exercise window so you don’t feel pressure to exercise if you leave - Free Thursday lunches at HQ, quarterly team events, and company offsites. - Top tier private coverage for health, vision and dental care - A new MacBook and tools you need to do your best work - Enhanced parental leave with up to 16 weeks for primary and 4 weeks for secondary - Learning & development budget WHY JOIN HUMAANS TODAY? HR tech is having its AI moment and we’re positioned to own it. Humaans started as a next-gen HRIS taking on large incumbents in a massive market. We’ve since evolved into something even bigger: an AI platform that sits across workforce ... (truncated, view full listing at source)
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