Senior Full-Stack Engineer – AI HR Platform + Equity

Job Title

Senior Software Engineer (Full Stack)

Salary

£80k–£100k + Equity

Company Description

Humaans – YC-backed AI platform for workplace orchestration

Job Description

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.

Location

London, UK

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.

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.

The ideal candidate

• 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.

Required Skills

• Full Stack Development, Kubernetes, TypeScript, React, Rest API, SaaS, Google Cloud Platform, Node.js, Postgres, WebSocket
• Language: English

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