Job Title
Senior Software Engineer (Full Stack)
Location
London, UK
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.
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.
Next steps
* Step 1. Visit our website.
* Step 2. Click ‘Talk to Jack’.
* Step 3. Talk to Jack so he can understand your experience and ambitions.
* Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
* Step 5. If Jill thinks you’re a great fit and her client wants to meet you, they will make the introduction.
* Step 6. If not, Jack will find you excellent alternatives. All for free.
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