Full-Stack Engineer - People Products (Freelance)

Join us as a Freelance Full-Stack Engineer to build one of Qonto's first internal applications: a modern, high-quality People platform that transforms the daily experience of 1,700+ Qontoers - from compensation cycles and performance reviews to everyday HR workflows. You'll work hand-in-hand with Mélodie, our Head of People Systems, on a high-ownership mission: co-define the product vision, design the architecture, and ship to production. This is not a staff-augmentation engagement - it's a mandate for someone who builds like an owner.

Responsibilities

Ship the People platform MVP by December 2026: migrate key Workday modules into a custom internal app (React for the front, Go for the back) that handles comp cycles, performance reviews, and daily HR workflows for 1,700+ Qontoers - on time and with zero compromise on quality.; Co-define the product vision and roadmap with Mélodie: run user discovery with People teams, challenge specs, and help decide what gets built first - not just how to build it.; Design for security and compliance from day one: architect systems that handle sensitive People data (GDPR, access controls, data residency) with the rigor the context demands.; Ship faster with AI: leverage AI tools (Cursor, Claude Code, Copilot…) in your daily workflow and build AI-enabled features where they create real leverage for the People team.; Enable long-term adoption: document your work, run training sessions, and set up governance so the People team can own and evolve the tools long after the mission ends.

Requirements

Strong full-stack engineering (backend primary): You've shipped production apps end-to-end, handling sensitive data. React and Go are familiar - but we're evaluating craft and delivery capacity, not your exact stack.; AI-native workflow: You use AI tools daily to ship faster - code generation, testing, architecture support. Not experimenting - actually delivering.; Architecture & security instincts: You design for GDPR, access control, and data residency from the start. Security is not an afterthought.; Product engineer mindset: You've shaped what to build, not just how. You run user discovery, challenge specs, and iterate on real feedback.; High autonomy + owner mindset: You've delivered complex, ambiguous projects with minimal guidance. You set your own priorities, communicate proactively, and unblock yourself.

Nice to have

Experience with HRIS/People tools (Workday, ATS, Payroll systems) or internal tooling for large organizations.

Benefits

A greenfield mandate with direct access to decision-makers - no layers of approval, no waiting on committees; A stack built on React and Go, and the Workday REST middleware - adaptability valued over stack matching; Unlimited access to AI tools: Cursor, Claude Code, Copilot, Notion AI; A culture where autonomy is the default: you own the architecture, set the direction, and ship; A mission with direct impact on every Qontoer's daily life from day one