Ruby Backend Developer (f/m/d) full-time bei HeyJobs GmbH

As a part of our fast growing team, we are looking for an experienced Ruby Backend Developer (m/w/d) who can contribute, take ownership, and help us scale our product and business.


  • A decisive role: You are part of our R&D team and get to take on more ownership in your area of expertise, working closely with other stakeholders in the business.  
  • An international team: Every individual matters - as a team of 14 different nationalities we value the synergy of different cultures, personalities and backgrounds.
  • Room for growth: We take a personal interest in your perspectives and development, so every employee has a budget for educational purposes (e.g. language or IT certificates) and realistic options for career development within the company.
  • A quality oriented development culture: We're proud of our code, practice TDD, like to pair when needed and use continuous integration
  • The perks of a start-up: We offer breakfast, free coffee, free soft drinks, a weekly team-lunch and you can relax over a round of ping-pong in our Kreuzberg office.


  • Further develop our internal API for our web products
  • Structure the backend data to use it for our web applications as well as our data pipelines
  • Work on improving the user experience and delivering a quality product
  • Further help us tuning and optimising distributed applications for performance/cost


  • 3+ years of experience building Ruby on Rails applications
  • Believe in extensively testing your own code (we use RSpec, Capybara, VCR)
  • Hands-on experience with profiling and optimizing applications (memory usage, SQL queries etc.)
  • Comfortable working with Git 
  • Understand that there’s usually more than one way to implement something, and you can choose the right tool and approach for the job
  • Have a good balance between "doing things right" and shipping fast


  • Experience with test-driven development 
  • Experience with client-side JavaScript: React, Vue or Angular
  • Experience with cloud providers: AWS, Google Cloud or Azure
  • Hands-on with Docker, Terraform, Ansible

Our environment is built on AWS and we use various AWS services (ECS, S3, Redshift, Lambda, etc). We deploy applications using Docker images with CircleCi, and Jenkins pipelines run our machine learning algorithms. Our infrastructure is built for Agile development, and our developers deploy features to production multiple times per day with CI/CD.

Our product development teams have struck a fine balance between iterating quickly while still producing high quality code. Every member of the team has a prominent voice and is encouraged to experiment, take risks and make suggestions that will have an impact on the business.

Interested? We are on a strong growth path, so don’t miss the chance!

If you'd like to be part of a highly collaborative and cross-functional team, with limitless opportunities to learn and grow, get in touch. Send us your application and we’ll get back to you as soon as possible. We’re excited to hear from you! 

Are you curious about the Start-up culture at HeyJobs?

Take a look at our Kununu or Glassdoor ratings!