Senior Fullstack Engineer @Cohort
Hexa (eFounders)

Hexa (eFounders)

Senior Fullstack Engineer @Cohort


Hexa (eFounders)

Hexa (eFounders)

  • Incubateur / Accélérateur, Accompagnement d'entreprises

Le poste

Senior Fullstack Engineer @Cohort

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Who are they?

🚀 3founders is a startup studio, part of Hexa

We partner with talented cofounders to build the next generation of web3 bricks, tools, and applications.

Web3 is about to power a new wave of innovation. We aim to empower companies with the fundamental tools to fully take advantage of the astounding web3 opportunities ahead of us.

💬 Who we are. We are passionate builders with one common goal: to build the next generation of web3 companies. We’re a team of hands-on expert in Product, Design, GTM and more, ready to help founders get their startups off the ground.

⭐ Our companies: Cohort and Dialog - with many more to come 🚀

👋 Who we are

Cohort is a community-led engagement platform designed for small and medium-size brands. Our solution empowers brands and organizations to offer exclusive experiences to their customers and community. With Cohort, brands can create meaningful and rewarding relationships with their customers.

We leverage the blockchain and NFT technology to easily manage access to a rich ecosystem of perks and benefits, and to transfer value back to the community.

Cohort was co-founded in March 2022 by Séraphie and Nathan.The platform was officially launched in May with our first customers.

Hexa (eFounders)
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Job description

💼 The position

We are looking for a Senior Fullstack Engineer. This is a unique opportunity to join Cohort as one of the first engineers and have a huge impact on the product and the technical stack.

You will work closely with Nathan, our CTO, and the rest of the team to build a world class platform from scratch.


  • Build, maintain and test product features end to end, from the user interface to the REST APIs
  • Work closely with the founders and product team to shape the platform
  • Leverage A/B testing and customer analytics tools to build a highly engaging platform for both brands and end users

Preferred experience

  • 5+ years in fullstack development: Experience working with React, REST APIs and SQL databases. Experience working with A/B testing frameworks
  • Ownership mentality: you are a doer and have a bias for action, no task is below you. You like to own projects from start to finish
  • Strong attention to details: code quality is important for you and you set a high bar
  • Entrepreneurial mindset: you thrive in fast-paced environments where you have broad responsibilities. You are ambitious and want to take a part in the development of a world-class product and company
  • Highly creative: you think outside the box and like to find creative solutions to hard problems
  • Outstanding communication skills: you are at ease communicating with both technical and non-technical stakeholders. You are passionate with what you do and know how to advocate for your ideas
  • Team player: you perform well in a group and enjoy sharing knowledge with your peers

🛠️ Technical stack

  • Backend: Node.js, Typescript, Nest.js, PostgreSQL, Redis
  • Frontend: Typescript, React
  • Infra: Google Cloud Platform, Terraform
  • Blockchain: Polygon, Hardhat, OpenZeppelin, Alchemy
  • Tools: Datadog, Sentry, Docker, Github, CircleCI, Postman, Amplitude, Google Analytics

*Hexa is committed to creating a diverse environment. All qualified applicants will receive consideration for employment irrespective of gender, origins, identity, background and sexual orientation.

We are aware there’s a long way to go with regards to diversity in our industry, which is why we encourage all applicants- and especially those listed above- to apply to our open positions*

Hexa (eFounders)
Hexa (eFounders)

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