Senior Backend Engineer (Search Team)

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.

If these core values sound like you: "be bold, do amazing things", "say what you mean, do what you say", "one team, same mission", "always be evolving": apply now!

*Team* 

The Search team aims to deliver the right information to the right person at the right time. To achieve this, we continuously improve the search and information classification experience within the product.
We rely on both our internal search engine and third-party engines to provide an immersive experience to our users.

The team consists of a Product Manager, 4 Backend Engineers, one Frontend Engineer and a UX Designer.

*Missions*

Your Responsibilities : Shaping the future of the product is a key responsibility for Search engineers. This includes thinking ahead about the product’s evolution, improving the relevancy of the search engine and the integration of other sources of knowledge.
On a daily basis, a team engineer contributes to the following:
- Defining features Designing APIs and the underlying data model Implementing business logic for various functionalities
- Acting as a proactive partner for API consumers, especially our web and mobile applications
- Optimization In this role, you will work closely with other team members (pair programming, design discussions, technical decision-making, Scrum ceremonies).

Tech Stack LumApps’ primary search engine is based on Elasticsearch. We also use PostgreSQL and message queues, all within a Kubernetes-based infrastructure. The codebase is primarily written in Python and Go. In addition to Elasticsearch, we integrate external search engines to provide a more comprehensive experience and allow more clients to integrate with their existing environments.

*Skills*

• We are looking for a curious, engaged team player who is eager to help others.

• 5 years of significant experience in Backend development, including experience with Elasticsearch

• Initial solid experience with Python and Go

• Ability to adapt in a fast-evolving environment, with a continuous improvement mindset and a willingness to learn from mistakes

• Established working habits and openness to sharing and promoting them within the team

• A favorite pastry—and the ability to explain why

• Familiarity with modern development practices (testing, code reviews, CI/CD, version control, etc.)

• Knowledge for search relevance

• Strong written and spoken English skills
  

💡 Why You’ll Love Working at LumApps

We’re proud to offer a work environment where people feel supported, valued, and empowered. Here’s a peek at what we offer:

🏡 Hybrid work model – 2 days at the office, 3 days remote

🕒 RTT days – ~10 extra days off per year

💳 Meal vouchers (SWILE) + free snacks & coffee 

🧘‍♀️ Yoga classes - Take a mindful break in our Paris office

👶 Supportive parental leave and family moments — yes, even a Christmas party for your kids !

🛡️ Health insurance (ALAN) – 60% covered + full life & disability cover

🎉 Afterworks, team celebrations & seasonal parties

💻 Equipment of your choice

🗣️ French & English lessons, professional development & access to Leeto CSE

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.