Senior Backend Engineer

Changers - contract


09 Feb

Open to all applicants globally!

It’s fun, keeps you healthy and saves CO2 – our app CO2 fit makes health promotion as well as climate protection easy and effective for companies and individuals.

We are looking for two motivated Backend Engineers with 5+ years of experience to join our team as a full on team member. We are happy to work remotely with you, but are looking for a long term relationship. You will be part in the expansion of our product, power our server system, actively bring in and integrate your own ideas and work closely with the other developers.

Your key responsibilities

  • Design and build a scalable, secure backend in PHP and Laravel
  • Setup and maintain infrastructure
  • Development of powerful APIs
  • Integration of third party APIs and REST services
  • Work on improving application performance and bug fixing
  • Work closely with other Developers, Management and QA


  • Strong OO design and programming skills in PHP
  • Experiences in Laravel 5.5
  • Knowledge of SQL, MySQL, MongoDB or similar data base management system
  • Experience on web service integration (REST, JSON)
  • Good practice in modern development processes; Test driven development, continuous integration etc.
  • Good team and communication skills
  • Ability to work independently as well as with a team
  • Good command of English, spoken and written

Optional desirable skills

  • Experience of development using web technologies
  • Good understanding of HTML, Javascript, jQuery, and Bootstrap

Salary and Perks

Remote working!


About Changers

Changers is a modern app based occupational health platform. Your employees earn coins for walking, cycling, and for taking part in healthy and sustainable activities. You can connect tree plantings and donations with the participation or you redeem the coins on a marketplace for vouchers and in raffles. According to your needs and budget.

You can use to get healthier and more engaged employees, build great teams and build a green employer branding. The system is fully customizable and costs only a few cent per user and month.



  1. We offer a remote contract position.
  2. You will be required to take one or two coding tests along with a video call interview.
  3. Direct Candidates only, no third parties, no recruiters, no staffing agencies

Please send applications to:

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