At Witco, we are transforming the way people experience their work environment. Our SaaS platform is used in 1,000+ buildings across 10+ countries to centralize communication, manage spaces, and enhance employee engagement.

We are now looking for a Stack Lead – Frontend Developer to drive technical excellence in one of our product squads. This is a high-impact role for someone who enjoys building clean, scalable interfaces and leading engineering initiatives.

Your Mission

As a Stack Lead Frontend Developer, you will:

• Lead the frontend development within a cross-functional squad (PO, Designers, Backend Developers)

• Architect, build, and maintain scalable features using React and TypeScript

• Define and ensure application-wide frontend best practices (performance, testing, accessibility)

• Contribute to the evolution of our design system and component library

• Collaborate with the Engineering Manager and VP Engineering on roadmap scoping and technical arbitrations

• Mentor junior and mid-level developers and perform code reviews

• Collaborate with Product and UX to build intuitive and beautiful user interfaces

Our Tech Stack

• Frontend: React, TypeScript, Redux Toolkit, Webpack, Figma, Storybook

• Backend: Node.js (NestJS), PostgreSQL

• CI/CD & Monitoring: GitHub Actions, Azure, Datadog, Sentry

• Collaboration: Notion, Slack, Jira

What We’re Looking For

✅ Must-Haves

• 5+ years of experience in frontend development, including 3+ years with React

• Strong expertise in TypeScript, state management, and performance optimization

• Deep understanding of component-based architectures and scalable design patterns

• Experience with testing frameworks (Jest, Testing Library) and CI/CD workflows

• A solid eye for design and attention to UI/UX details

• Ability to lead by example and bring structure to frontend practices

• Fluent French, and excellent English (our product and tech teams are international)

➕ Nice to Have

• Experience in SaaS or multi-tenant platforms

• Familiarity with accessibility and internationalization best practices

• Contribution to open-source projects or internal design systems

• Experience in scale-up environments or managing fast-growth product delivery

Why Join Us

• A meaningful product improving thousands of employees’ daily life

• A collaborative and talented team in central Paris

• Direct impact and ownership over your domain

• Tech culture that values quality, autonomy, and knowledge sharing

• 1–2 days remote per week, training budget, health insurance, Lunch card

Hiring Process

1. HR Interview - 30 min
2. Technical interview – 1 hour
3. Live Case + debrief – 1 hour
4. Team Fit – 1 hour
5. Final Interview - 1 hour