Ruby Engineer (Contract)

London, United Kingdom



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We are a team on a mission, to put accessible and affordable healthcare in the hands of every person on earth. Our mission is bold and ambitious, and it’s one that’s shared by our team who shares our values, to dream big, build fast and be brilliant.

To achieve this, we’ve brought together one of the largest teams of scientists, clinicians, mathematicians and engineers to focus on combining the ever-growing computing power of machines, with the best medical expertise of humans, to create a comprehensive, immediate and personalized health service and make it universally available.

At Babylon our people aren’t just part of a team, they’re part of something bigger. We’re a vibrant community of creative thinkers and doers, forging the way for a new generation of healthcare. We’re only as good as our people. So, finding the best people is everything to us.

We serve millions, but we choose our people one at a time…

The Role

We are looking for motivated, strategically minded and execution focused Senior Software Engineers to work with our Core Platform Team. Reporting to the team’s Technical Lead, you will be part of a collaborative, technical team responsible for developing the core backend services powering babylon’s cutting edge healthcare platform to deliver an exceptional healthcare experience.

You will be working with highly skilled engineering, product and marketing teams to iteratively evolve the platform as we scale internationally.


    • A good working knowledge of Rails framework and its best practices
    • Is able to successfully use Ruby outside of Rails
    • Familiar with most popular RubyGems and Bundler
    • Experience in Test Driven Development using the most popular libraries
    • Solid Knowledge of databases, SQL and query optimization
    • Proven experience of working in teams in the successful delivery of complex, highly performing and high quality products.
    • Experience of Agile practices

Desirable Skills

    • Unit-test code for robustness, including edge cases, usability and general reliability.
    • Inversion of control/ dependency injection
    • Distributed message system design/development
    • TDD/BDD frameworks
    • cloud based services, e.g (AWS, Parse)

Babylon believes it is possible to put an accessible and affordable health service in the hands of every person on earth. How? By combining the ever-growing computing power of machines with the best medical expertise of humans to create a comprehensive, immediate and personalised health service and making it universally available.