Back End Developer

Cheerz is seeking a Senior Backend Developer to join their technical team of 25 members (Backend, Frontend, iOS, Android, UX/UI, QA, and DevOps) in Paris, France. The role offers a hybrid work arrangement with monthly in-person team gatherings.

The company develops and maintains web and mobile applications that impact hundreds of thousands of users across Europe, focusing on creating unique and personalized photo memories. The technical team is organized into four platform-specific teams (Backend, Apps, Web, and Infrastructure) with developers distributed across three product-focused agile squads.

As a Senior Backend Developer, you'll work primarily with Ruby on Rails and React, while also participating in the gradual migration to new backend technologies like Java, C#, or Go. The role combines hands-on development with technical leadership responsibilities, including mentoring, architecture planning, and promoting best practices.

The position offers significant technical growth opportunities with dedicated time for platform improvements: one sprint out of four is reserved for technical work, 20% of sprint time is allocated for technical tasks, and there are 6 weeks of "platform days" at year-end. The team values code quality, clean architecture, strong testing culture, and continuous integration/deployment practices.

The ideal candidate should have 5+ years of development experience, strong expertise in Ruby and Rails, and knowledge of React. Experience with additional backend languages like Java, C#, Go, or Rust is highly valued. The role requires both technical excellence and strong collaboration skills, as you'll be working closely with cross-functional teams in an agile environment.

Cheerz offers a collaborative and learning-focused environment, with regular tech meetups, knowledge sharing sessions, and opportunities to work on challenging technical problems at scale. The company is committed to diversity and equal opportunities, and all positions are open to people with disabilities.