Senior Python Software Engineer - (F/M) - Lyon/Paris/Lille

As a Back-End Developer, you will be an integral part of the team. Your main responsibilities will include:

• Contributing to architectural decisions and technical solution design.
• Developing and maintaining robust, scalable back-end features.
• Designing APIs in close collaboration with the front-end and mobile teams.
• Supporting our testing strategy (unit and automated tests).
• Taking part in code reviews and continuous improvement of best practices.
• Monitoring and improving the performance of our services.

We are looking for someone with proven experience in demanding technical environments, capable of delivering end-to-end development and actively contributing to team discussions.

What we expect:

• Strong expertise in Python and solid software development fundamentals.
• Ability to step back, assess technical challenges, and propose adapted solutions.
• Professional proficiency in English (written and spoken).
• Strong focus on code quality, testing, and maintainability.
• A collaborative, inclusive mindset and a supportive team spirit.
• High autonomy in managing tasks and decision-making.

Nice to have:

• Experience with cloud technologies (AWS, GCP, Azure).
• Familiarity with containers and orchestration tools (Docker, Kubernetes)., * Back-end: Python
• Front-end: React with TypeScript
• Databases: SQL (PostgreSQL) and NoSQL (Google Datastore)
• Hosting: Google App Engine & Azure
• Choice of operating system
• Choice of IDE

The Social team is a collective of 7 passionate and supportive people:

• 2 back-end developers
• 3 front-end developers
• 1 Product Owner
• 1 Manager

We work in a collaborative, inclusive, and supportive environment where each team member plays a key role in shaping and evolving our web platform. We value diverse voices and backgrounds and believe that together we build the most innovative and sustainable solutions.

Our Mission

The Social team's main goal is to help employees connect through dynamic communities and a personalized feed, fostering collaboration and meaningful communication.

Our responsibilities focus on enhancing a community solution: a horizontal, social space for sharing, compared to the more top-down nature of a traditional intranet.

Beyond communities, our work also includes:

• Delivering relevant content to users through feeds and streams.
• Managing user backups and search history.

We aim to build a product that is useful, accessible, and sustainable-in a team where everyone has the space to express themselves, learn, and contribute.

Our Values

We believe in a team culture where:

• Curiosity is encouraged: to learn, share, and experiment.
• Commitment is valued: advancing the product, the team, and the company.
• Kindness is the norm: we support, listen to, and help each other.

Creativity is stimulated: every problem has a solution, often collective.

LumApps is now more than just an Employee Experience Platform - it is an AI-powered Employee Hub that supports companies in their digital transformation of communication, collaboration, and engagement with their customers, partners, and above all their employees. Our platform is a proven leader in this dynamic market with a truly unique vision and product. It has been deployed by Fortune 500 clients around the world and is delivering meaningful business benefits. LumApps is identified as a leader in Gartner's Magic Quadrant for Intranet Packaged Solutions as well as in Intranets Forrester Wave, and regularly selected for the French Tech Next40/120 program. In 2025, LumApps strengthened its leadership position by partnering with Beekeeper, a pioneer in frontline employee experience solutions. This strategic collaboration expands our reach and impact across all types of workers - from HQ to the frontline. Our mission: To make people feel that they belong and have a purpose. To create an environment where all employees are engaged and work together towards the same goal. Over 700 leading companies trust our solution to: Improve the productivity of their teams with our AI-powered Collaborative Experience Platform integrated with both Google and Microsoft collaborative suites, Transform employees into real ambassadors of their company, Make employees more efficient and better connected to their peers and relevant information, regardless of their location, with the tools and information they need at their fingertips, Help companies reduce turnover, accelerate employee onboarding, better collaborate and share knowledge, and even improve their customer experiences. With a team of over 600 Lumies spread across 11 offices (Lyon, Paris, Lille, Sophia Antipolis, London, Barcelona, Hamburg, Austin, Tokyo, Zurich, Krakow), we support large enterprises all around the world. Over the past year, we have been driving an ambitious phase in our journey under the impulse of our new shareholder Bridgepoint, aimed at propelling us to become the clear leader in our market and shine worldwide in our industry. We are looking for individuals who are excited to actively participate in this transformation.