Software Engineer - Ruby



This job is no longer accepting applications

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Software Engineering
London, UK
Posted on Tuesday, March 28, 2023


We’re on a mission to make app building so easy everyone can do it – regardless of their background, tech knowledge or budget. We’ve already helped thousands of entrepreneurs, small businesses and even global brands, like the BBC, Makro and Pepsi achieve their software goals and we’ve only just started. was voted as one of 2023’s ‘Most Innovative Companies in AI’ by Fast Company, and won Europas 2022 ‘Scaleup of the Year’. Our team has grown to over 800 people across the world and our recent announcement of $250m Series D funding (and partnership with Microsoft) means there’s never been a more exciting time to become a Builder.

Life at
At we encourage you to experiment! Each role at Builder has unlimited opportunities to learn, progress and challenge the status quo. We want you to help us become even better at supporting our customers and take AI app building to new heights.

Our global team is diverse, collaborative and exceptionally talented. We hire people for their differences but all unite with our shared belief in Builder’s HEARTT values: (Heart, Entrepreneurship, Accountability, Respect, Trust and Transparency) and a let’s-get-stuff-done attitude.

In return for your skills and commitment, we offer range of great perks, from hybrid working and a variable annual bonus, to employee stock options, generous paid leave, and trips abroad #WhatWillYouBuild

About the role

As a Software Engineer, you will play a pivotal role in the development and sustenance of our cutting-edge Ruby frameworks, libraries, and pre-built features. This dynamic responsibility entails close collaboration with fellow developers, collectively striving to infuse efficiency, scalability, and sustainability into our codebase. Your expertise will extend to nurturing code quality throughout the organisation. Your expertise and dedication will significantly contribute to shaping the core of our technology, fostering a culture of excellence and innovation across the board.

Why you should join

As a valued member of our team, you'll have the exciting chance to shape and craft's Ruby framework and architecture. One of the team's core responsibilities lies in upholding superior code quality throughout the organisation. This translates into an enriching environment where you can both glean insights from seasoned developers and actively contribute to the advancement of automated code review tooling. Joining means becoming part of a company that places innovation, creativity, and collaboration at its core. Anticipate being embraced by a vibrant and supportive team culture that fosters personal and professional growth, setting the stage for an inspiring journey ahead.

Our Tech Stack

Our in house platform teams work with a variety of technologies that’ll you’ll get to play with. Experience in some would be an advantage but is not strictly necessary. Most important is using the right tool for the job so we’re always evaluating what tech makes the most sense and we’d love for you to have some input in this.

  • Ruby, Ruby/Rails
  • Docker and Kubernetes
  • GitLab
  • Postgres, Redis
  • AWS, Azure
  • Strong experience in Ruby and Ruby on Rails.
  • Familiar with one or more cloud provider’s services. Experience with containerized applications and infrastructure provisioning would be a plus.
  • Experience working in fast-paced and dynamic scrum teams.
  • Experience architecting and designing scalable solutions
  • Working knowledge of standard CS fundamentals (data structures, algorithms, complexity analysis)
  • A systematic debugging and problem solving methodology
  • Performance-based bonuses paid on a quarter-by-quarter basis
  • Stock options in a $100 million funded Series C scale-up company
  • Private medical & dental insurance provided by AXA
  • Generous pension contributions
  • Perkbox
  • (benefits are currently under review so hoping to offer a lot more soon!)

This job is no longer accepting applications

See open jobs at Builder.