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LumApps acquires Comeen: Unifying digital and physical work
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Paris, France
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Full-Time

Senior Ruby on Rails developer

Comeen is recruiting a Senior Ruby on Rails developer in Paris.

🤠 The company

Comeen by LumApps is a leading workplace experience platform designed to revolutionize the way teams interact, collaborate, and thrive in modern work environments.

We help organizations create seamless and engaging workplace experiences through solutions that connect employees to their workplace. From workplace management and room booking to digital signage, our products help companies build more connected, productive, and efficient workplaces.

Today, more than 350 companies across 42 countries rely on Comeen by LumApps to enhance workplace productivity, employee experience, and communication. We work with world-class organizations, from mid-sized businesses to Fortune 500 companies, including Auchan, Carrefour, Colgate, Sanofi, Veolia.

In 2026, LumApps acquired Comeen, expanding its AI-powered Employee Hub and strengthening its vision for a unified employee experience acrosse the digital and physical workplace. Trusted by more than 700 organizations worldwide, LumApps helps transform employee communication, collaboration, and engagement. Recognized by Gartner and Forrester as a leader in the intranet and employee experience market, LumApps supports some of the world's largest enterprises through a global team of more than 600 employees across 11 offices.

Applying means joining the LumApps adventure: combining the agility, ownership, and entrepreneurial mindset of a fast-moving product team with the scale, resources, international environment, and career opportunities of a global company.

✨ The job

As a Ruby on Rails senior developer, you will join our development team. You will work on our workplace features such as meeting room management and desk booking. Your work will impact thousands of employees worldwide!

Your missions

  • Backend Engineering: Design, build, and maintain efficient, reusable, and reliable Ruby code within the Ruby on Rails framework.
  • Ecosystem Integration: Develop and optimize complex integrations with Google Workspace and Microsoft 365 suites (utilizing Microsoft Graph API, Google APIs, OAuth2 flows).
  • Architecture & Scalability: Lead architectural decisions to ensure system performance, security, and scalability as our user base grows.
  • Code Quality: Uphold high engineering standards through rigorous testing (RSpec), comprehensive code reviews, ...
  • Technical Leadership: Provide mentorship to junior developers and contribute to the continuous improvement of our development processes and documentation.

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📅 Start date

ASAP

👤 Your profile

  • Ruby on Rails: 5+ years of professional experience with expert-level knowledge of the framework and its ecosystem (Sidekiq, ActiveRecord, etc.).
  • Rust and Python : Experience in Python or/and Rust is a plus
  • Database Management: Strong proficiency in MySQL and Redis, including schema design and query optimization.
  • API Expertise: Proven experience in building and consuming RESTful APIs, experience on third-party integrations is a plus (Microsoft or Google Workspace API)
  • DevOps: Familiarity with CI/CD pipelines and Git versioning, experience on Google Cloud Platform is a plus

💸 Salary

According to profile

👀 Interested?

Send your application with as much information as possible (Resume, link to public repositories, details about past RoR projects)

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