Backend Developer

Product (R&D)
Full remote or Rennes

The opportunity

💡 You'll be part of the R&D team, made up of 70 people (developers, data, devops, qa, product owner, engineering manager). We work as a features team, divided into 3 main functional areas in order to :

  • Enable efficient collaborative working via our Board tool (whiteboarding and visual management), with a strong focus on performance, fluidity and ease of adoption.
  • Create a space for strong participation during meetings and workshops, whatever the location of participants (synchronous, asynchronous, hybrid).
  • Facilitate the integration of our tool into companies' information systems (SSO, SCIM, OKTA, Teams, etc.) and via public APIs (

🤝 What your day-to-day will look like

We're pragmatic, and we use what works for us. That's why you won't hear about SCRUM or Kanban with us. We use our own processes inspired by these agile methods. For example, we don't estimate tasks (#noEstimate), prioritizing them by value, both functional and technical.

Being part of R&D also means being part of the PHP team. Every Tuesday morning, it's "Culture!" where all the PHP developer get together to exchange best practices and tech news. It's also a good time to organize a coding dojo.

⭐ Your missions 

🚀 You'll have the opportunity to work on a variety of subjects depending on your skills and the teams : 

🚀 You'll maintain and develop the existing codebase (PHP, Symfony and DB updates).

🚀 You'll participate in the development of our public APIs.

🚀 You'll implement technical solutions to improve and optimize the performance of the Klaxoon application.

💻 Stack

  • PHP 8, Symfony 5
  • Redis, Postgresql, Elasticsearch, RabbitMQ
  • React, Javascript/Typescript
  • Node.js et framework Fastify 
  • Jest, react-testing-library 
  • Test : TestCafé (Node JS) & Playwright
  • Git/Gitlab, Docker
  • Cloud & Kubernetes

You are:

🎯 The profile we're looking for is a dynamic, inquisitive person with a real interest for the backend and significant experience with PHP and Symfony.

You're familiar with continuous code improvement and unit testing, and you're also familiar with Git.

Klaxoon Spirit

The Klaxoon spirit is shared by the interactive team and is based on 3 key concepts:

  • Interactive Spirit: We take care to maintain this unique state of mind between passion, creativity and energy. We cultivate our differences, encourage dialogue and exchange, share our expertise and innovate every day.
  • Interactive spaces: Klaxoon spaces have been designed to enable effective teamwork and provide an experience that reflects our product: simple, accessible, efficient, adaptable and inspiring.
  • Interactive moments: We encourage exchange and interaction wherever you are and throughout the year through team rituals and collective workshops.

We are committed to equal employment opportunities, regardless of your gender, religion, age, sexual orientation, ethnicity, disability, place of origin or academic level.

Product (R&D)
Full remote or Rennes
Remote status
Employment type


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About Klaxoon

Our purpose is to let every team member express their full potential, be more efficient in all of their projects thanks to visual management techniques, and benefit from the full power of collective intelligence.
Run efficient workshops, trainings, team rituals and much more, while accelerating on collaboration, success and team efficiency.

Launched in 2015, Klaxoon is a French company and a member of the French Tech 120. The company has over 250 employees across the world: Rennes (HQ), Paris, Lyon, London, Frankfurt.
Klaxoon won numerous prizes including 4 CES innovation awards. Adopted by millions of teams in 120 countries, Klaxoon has 5000+ client references from SMBs and mid-size companies to universities, NGOs, and public authorities as well as 100% of French CAC 40 companies and 15% of the Fortune 500.