Senior Software Engineer (£80k–£100k + Equity) at Humaans at Jack & Jill/External ATS

London, England, United Kingdom -

Full Time

Start Date

Immediate

Expiry Date

05 Jun, 26

Salary

100000.0

Posted On

07 Mar, 26

Experience

5 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

TypeScript, React, Node.js, Postgres, Kubernetes, Google Cloud Platform, Rest Api, Websocket Infrastructure, Full-stack Development, SaaS Development, Product Strategy, Technical Architecture

Industry

Staffing and Recruiting

Description

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers. She will pick the best candidates from Jack's network The next step is to speak to Jack. 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. Who are Jack & Jill? 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. 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. 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. We never post fake jobs This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network. Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description. We appreciate this can make them look a bit suspect, but there isn't much we can do about it. Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.

Responsibilities

The role involves developing and scaling end-to-end features using a modern TypeScript stack (React, Node.js, Postgres) deployed on GCP via Kubernetes. Responsibilities also include architecting and expanding public REST API and real-time WebSocket infrastructure for third-party integrations.