Senior Full-Stack Engineer (Full-Time – Paris or Hybrid - €60-70k) - Paris

Fairglow

💡 Transition partners
Long-term contract
Localisation Paris, France
Occasional remote authorized
From 5 to 10 yrs of exp.
Posted on 09-22-2025
Start: September 2025

➔ Description of the mission

🌱 Join Fairglow as a Senior Full-Stack Engineer (Full-Time – Paris or Hybrid - €60-70k)

If you’re ready to build for real impact, come lay the foundations with us.


🚀 What is Fairglow?

Fairglow is a Franco-American startup based in Paris and Los Angeles, at the crossroads of technology and sustainability.

Our mission: equip cosmetic brands and manufacturers with powerful digital tools to measure, reduce, and manage their environmental impact.

We currently work with committed players in the cosmetics industry, providing a SaaS suite that includes:

  • Automated carbon footprint analysis
  • Interactive sustainability dashboards
  • AI-powered action plans
  • Intuitive workflows for managing impact

🎯 Our ambition: to become the global B2B reference in climate tech for chemical products

📍 Market: 100% B2B – currently focused on cosmetics, expanding soon.

👉 Introducing Fairglow


🤝 Who you’ll be working with

You’ll collaborate closely with:

👉 Meet the team


🛠 What you’ll do

You’ll play a key role in our product’s next evolution:

  • Re-architect core apps with an AI-native approach
  • Develop frontend & backend features
  • Manage offshore contractors (task assignment, reviews, QA)
  • Help define scalable engineering workflows
  • Handle urgent technical issues and ensure product stability

Tech stack: Typescript / Python / PostgreSQL / ElasticSearch / Google Cloud


✅ You’re a great fit if you:

  • Have 5+ years of full-stack development experience
  • Know how to architect products, not just ship features
  • Have worked in startups or small, fast-paced teams
  • Thrive in ambiguity and love bringing structure to chaos
  • Are fully fluent in English (written and spoken), French is a plus
  • Want to build a product that has real-world impact

❌ Probably not the right fit if you:

  • Have only worked in large, structured teams
  • Need rigid processes to function
  • Prioritize perfect code over shipping
  • Don’t feel confident communicating in English
  • Aren’t interested in sustainability or environmental topics

💥 Why join us?

  • Be a key player in our strategic tech transformation
  • Build everything: stack, tools, process, team
  • Join a kind but ambitious culture, focused on meaningful work
  • Work in Paris or remotely
  • Competitive salary + equity as an early employee

📈 Growth paths

  • VP Engineering – team leadership & process structuring
  • Chief Architect – product scalability & deep tech excellence

🏢 Practical Information

  • Contract: Permanent (CDI)
  • Salary: €60-70K + bonus depending on profile and experience
  • When: ASAP
  • Where: Offices in the 11th arrondissement of Paris
  • Perks: Great health insurance (Alan), meal vouchers, 50% coverage of the Navigo transportation pass, a brand-new MacBook Pro, and plenty of afterwork events and solid team-building sessions.

📬 Hiring process - max 2 weeks

  1. Intro call (30 min)
  2. Small project or live code review
  3. Technical interview with Daniel
  4. Culture interview with Jason, Evan & Quentin
  5. Offer

➔ Profile

  • 5+ years of experience in full-stack development
  • Strong front-end experience with TypeScript and React
  • Comfortable building and maintaining backend systems in Python (FastAPI or similar)
  • Experience managing or working with offshore development teams
  • Familiarity with AI-assisted development tools and workflows
  • Pragmatic problem-solver who balances clean code with delivery
  • Passionate about sustainability, climate tech, or purpose-driven software
  • Fluent in English; French is a strong plus

Fairglow

Fairglow is a pioneering sustainability tech company dedicated to aiding cosmetics laboratories, retailers, and brands in quantifying, reporting, and mitigating their carbon footprints.

💡 Transition partners

The mission of this structure is to help companies and citizens improve their environmental and social impact. For example, CSR consulting, training, raising awareness of transition issues, media, etc.

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