Senior Back-End Developer (F/M) Sophia-Antipolis/ Paris/Lyon/Krakow

  • Tassin-La-Demi-Lune, Valbonne
  • Full-Time
  • Start Date: 01 June 2026
  • Apply Now

About

Founded in 2015 and originally from Lyon, LumApps is an international scale-up and a leading player in the digital employee experience space. Its SaaS platform, seamlessly integrated with Google Workspace and Microsoft 365, centralizes internal communications, HR resources, and business applications, providing a unified and personalized interface to more than 6 million users across 700 customer organizations, including Airbus, LVMH, Publicis Sapient, Ascension Health, Dish Network, Electronic Arts, and Japan Airlines.

In May 2024, LumApps reached a major milestone by welcoming UK-based private equity firm Bridgepoint as a majority shareholder in a transaction valued at $650 million. This strategic partnership is designed to accelerate international growth, particularly in the United States, and to further strengthen product innovation with a strong focus on artificial intelligence and machine learning.

Among its recent innovations, LumApps has introduced the Gen-AI Companion, an AI-powered conversational assistant, along with micro-learning modules that enhance user engagement and support continuous learning across organizations.

Building on this momentum, LumApps continued to expand its ecosystem in 2025 through a strategic collaboration with Beekeeper, a leader in frontline employee experience solutions. This partnership enables LumApps to support the full spectrum of the workforce, extending digital experiences beyond headquarters to frontline and deskless employees.

In 2025, LumApps was recognized as a Leader in the Gartner® Magic Quadrant™ for Intranet Packaged Solutions for the third consecutive year, positioned with the furthest completeness of vision, reflecting its innovative product strategy and commitment to exceptional employee experiences.

With sustained growth, strong global adoption, and a clear focus on AI-driven, people-centric innovation, LumApps continues to shape the future of work by empowering organizations to connect, engage, and enable their workforce more effectively than ever before.

Job Description

Want to revolutionize the way we learn?
At LumApps, our mission is to create truly groundbreaking learning experiences.
Our motto: “More learning moments, better future.”

🔭 About LumApps Learning
As pioneers in mobile learning, Teach on Mars develops a next-generation digital training platform for companies.

Natively mobile and social, it leverages the latest advances in artificial intelligence to deliver relevant content to users every day and accelerate their skills development.

At the end of 2023, Teach on Mars joined LumApps, a B2B SaaS scale-up that builds innovative, integrated intranets for large European and international companies. By becoming part of LumApps, Teach on Mars extends micro-learning to every employee, seamlessly embedded into the overall employee experience.

🌍 About LumApps

  • A SaaS platform dedicated to Employee Experience, engaging every employee through personalized communication, on any device, wherever they work, while connecting them with the tools, people, and information they need to be their most productive.

  • Our mission: to give employees a sense of belonging and purpose.

  • Trusted by 700+ enterprise customers worldwide.

  • A team of 600+ Lumies, spread across 11 offices: Lyon, Paris, Sophia-Antipolis, Lille, Barcelona, Hamburg, London, Austin, Tokyo, Zurich and Krakow.


*The role *

As a Senior Back-end Developer, you will play a central role in shaping our technical solutions and ensuring the robustness of our SaaS platform. We are looking for someone hands-on, with a strong track record of contributions (GitHub or similar) and proven experience in at least two of our core back-end technologies.


*Your main responsibilities*

  • Contribute to architecture decisions and technical design.

  • Develop and maintain scalable, reliable back-end features.

  • Design and implement APIs in close collaboration with the front-end and mobile teams.

  • Write and maintain automated tests (unit, integration).

  • Participate in code reviews and continuously improve best practices.

  • Monitor, debug, and optimize services in production.

  • Ensure that the codebase follows industry-leading standards and practices.


*What we’re looking for*

We need a strong technical profile, Senior or Senior+ level, who is entrepreneurial, pragmatic, and able to deliver end-to-end solutions in a collaborative environment.

You should bring:

  • Proven expertise in at least 2 of our 3 main back-end technologies: PHP, C# .NET, Python.

  • A strong track record of hands-on coding contributions (heavy GitHub commit history preferred).

  • Professional proficiency in English (written and spoken).

  • Solid software engineering foundations: clean code, maintainability, testing, scalability.

  • Strong sense of ownership and autonomy, with the ability to make sound technical decisions.

  • A collaborative and inclusive mindset, thriving in teamwork.

Nice-to-have:

  • Experience with cloud platforms (AWS, GCP, Azure).

  • Familiarity with containers and orchestration (Docker, Kubernetes).

  • Knowledge of modern front-end frameworks (React, Angular).

  • SaaS product.

  • Back-end: PHP, C# .NET, Python

  • Front-end: React, Angular.

  • Databases: PostgreSQL, MySQL.

  • Hosting: GCP & Azure.

  • Freedom of choice: OS & IDE.


*Our tech environment*

  • SaaS product.

  • Back-end: PHP, C# .NET, Python

  • Front-end: React, Angular.

  • Databases: PostgreSQL, MySQL.

  • Hosting: GCP & Azure.

  • Freedom of choice: OS & IDE.


We aim to celebrate diversity and are committed to creating an inclusive environment for all employees. We encourage applications from candidates of all backgrounds, identities, and experiences.

Additional Information

  • Contract Type: Full-Time
  • Start Date: 01 June 2026
  • Location: Tassin-La-Demi-Lune, Valbonne
  • Education Level: Master's Degree
  • Possible partial remote
  • Salary: between 50000€ and 70000€ / year