Builder on residence - Permanent

Who we are

Hexa is building the infrastructure for exceptional entrepreneurs, wherever they are in their journey.

Our founding activity is a startup studio (Hexa Start): we create companies from scratch with outstanding founders, and support them intensively from idea to product-market fit. But we've grown beyond that. Hexa Sprint supports early-stage startups that already exist and need to accelerate hard. Hexa Scale works with more mature companies ready to go to the next level. Three distinct models, one shared ambition: back the right people and help them build something that lasts.

Earlier this year, we brought Tanguy Goretti on board as our CTO, a signal of where we're headed. He operates as a tech leader and ecosystem builder: supporting founders across our portfolio on technical decisions, pushing Hexa's employer brand in the engineering world, building partnerships with the best tools and labs out there, and helping early-stage CTOs level up. He's running a high-leverage function, and he's looking for someone to join him.

The role

You'll work directly alongside Tanguy and you're here to build!

What you'll actually do

• Build internal tools that give our founders and core team an edge, on fundraising, recruiting, GTM. Launch agents that automate what slows us down.

• Launch MVP for new startups alongside our partners, on the hottest topics, before there's a team. Short deadlines, fast shipping, real stakes. Probably the most exciting part of the job.

• Support the Hexa tech ecosystem: our conferences with top labs, our CTO lunches with partners like Cloudflare or Vercel, and the community we're building around it.
  

What we're looking for

• Recently graduated from a top engineering school

• Deeply autonomous: you don't need hand-holding, you need a problem worth solving

• Side projects that prove it. Cool ones.

• AI-native: you use it in everything you touch, and it shows in what you've built in the last 6 months

• TypeScript and/or Python.

• Based in Paris (at least 3 days/week)
  

What's in it for you

• Package: €72K to €85K gross/year (base salary of €60K–€71K + 20% annual profit sharing)

• Opportunity to invest in Hexa portfolio startups at a (very) preferential rate

• Swile meal card

• 8 to 12 RTT days per year

• Flexible remote work policy

• Mobility budget: €500/year for green transportation (bike, metro, electric scooter)

• Health insurance with 50% coverage for you and your family

• 1% Holiday bonus