Full-Time

Senior Backend Developer

Posted on 10/31/2025

Cheerz

Cheerz

51-200 employees

E-commerce platform for personalized photo products

No salary listed

Paris, France

Hybrid

Category
Software Engineering (1)
Requirements
  • Minimum of 5 years of development experience.
  • Formation en informatique, ingénieur ou autodidacte.
  • Proficiency in backend development with Ruby on Rails, databases, and REST API implementation.
  • Ability to participate in a platform modernization as Ruby is progressively replaced by Java, C#, Go, or another language and have proficiency in at least one of these languages (Java, C#, Go).
  • Experience as a senior developer and ability to work within a squad.
  • Strong problem-solving skills and ability to model an architectural solution with rational justification.
  • Willingness to contribute to technical leadership, including code reviews, pair programming, and mentoring.
  • Good collaboration and ability to work with cross-functional teams (core, squad, platforms).
  • Willingness to learn and adapt to new technologies and frameworks.
Responsibilities
  • Develop as an integral member of a squad, actively contributing to backend platform developments.
  • Identify concrete areas for improvement in the existing codebase and propose them to the team.
  • Mentor and evangelize best practices for technical efficiency and quality (technical watch, run of workshops, code reviews, pair programming) with Staff Engineers.
  • Participate in project scoping for both product and technical roadmaps; contribute to design and development of new features; provide critical input on estimates and impacts.
  • Take a holistic view of problems, be responsive, and able to act quickly when needed; model an application architecture and justify choices with rational argumentation.
  • Write tests, documentation, and propose technical improvements; fix bugs efficiently to unblock users; ensure code quality, performance, and security.
  • Collaborate daily with developers across core, squad, and platforms; share knowledge and challenge and be challenged on technical choices.
  • Be an active member of the tech team, participating in weekly meetings, workshops, meetups, and other team growth activities.
Desired Qualifications
  • Experience with other back-end languages such as Java, C#, Go, or Rust is strongly appreciated.
  • Any open-source projects or side projects can be shared with us.

Cheerz creates personalized photo products for individuals and families through an online store. Customers upload their own photos and customize items like hardcover or softcover photo books, canvas prints, standard photo prints, fridge magnets, and wall decor. The platform guides users to design products easily, and orders are fulfilled and shipped to the customer. The company differentiates itself with a focus on high-quality products, a smooth and user-friendly shopping experience, and fast delivery paired with strong customer service. Cheerz’s goal is to help people preserve memories in tangible forms by offering a variety of customizable items and seasonal promotions to attract and retain customers.

Company Size

51-200

Company Stage

Acquired

Total Funding

$56.1M

Headquarters

Paris, France

Founded

2012

Simplify Jobs

Simplify's Take

What believers are saying

  • Happiness Team provides daily support from 9am to 7pm enhancing retention.
  • App warns of pixelated photos and offers layouts improving order quality.
  • Premium paper prints start at £0.14 with quick two-day delivery.

What critics are saying

  • EU AI Act erodes Facebook and Instagram photo access by March 2026.
  • Snapfish undercuts prices by 30% via Amazon capturing consumers in Q1 2026.
  • Gennevilliers carbon tax triples energy costs forcing 20-30% hikes in January 2026.

What makes Cheerz unique

  • Cheerz Factory in Gennevilliers enables local printing for fast delivery.
  • App downloaded by over 4 million European users integrates social media photos.
  • Automatic discount codes drive viral referrals upon purchase.

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Benefits

Remote Work Options

Flexible Work Hours

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