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Mid-level Ruby Software EngineerRemote

Ada is the first AI assistant to help you choose the best apartment with no hassle. We are searching for a Mid-level Ruby Software Engineer to develop and maintain our back-end application. Ada’s a VC-funded company with an artificial intelligence research grant from The National Centre for Research and Development (NCBR). We’re building a strong, diverse team of curious, creative people who want to help people enjoy living in their brand new great apartments.


  • Delivering features in an agile environment
  • Writing tests
  • Being self-sufficientWe’re a collaborative team and it’s necessary that you know when to ask questions, but we expect you to be reliable and proactive—someone who has delivered real applications in production environments on time and on budget.
  • Making our Rails 5 application and its supporting microservices more performant
  • Contributing ideas on how to improve the codebase and leaving things better than you found them


  • 2+ years of experience in developing Ruby on Rails applications
  • A strong opinion on how to write good tests in RSpec
  • Experience with PostgreSQL
  • Being comfortable with Git—GitLab or GitHub
  • Knowing how to write clean and solid background workers and APIs
  • Knowledge of HTML and CSS
  • Good English

A big plus if you:

  • Have Open Source projects in your portfolio—as well as contributions
  • Have light background in data science or machine learning
  • Worked before with any of the technologies belowTDD, BDD, Facebook Messenger, Microservices, Kubernetes, Firebase, Capybara, Selenium, Algolia, JavaScript, React, PostGiS
  • Know other programming languages—e.g. JavaScript or Go

We’re offering:

  • A possibility to open source reusable code you create
  • A flat team hierarchy with supportive and highly collaborative people of different backgrounds, experiences, abilities and perspectives
  • Flexible working hours
  • A meeting-light culture
  • A fully remote work environment—you can work from home or a co-working space in your cityWe believe everyone should be able to live wherever they want—and preferably find their apartment there with Ada 😊
  • A salary of 6500-8300 PLN net + VATContract Work (Umowa o dzieło) or B2B (Faktura)

If you’d like to apply or have any questions, please contact us at:

If you apply, please attach:

  • Your CV or LinkedIn profile
  • Your GitHub profile or a link to your personal website
  • A short letter about yourself and your experience with Ruby

We work at Ada hoping to do the best work of our lives. Come and join us.

You might also be interested in other roles at Ada: