Backend Ruby on Rails Developer

London, England
Work Type: Full Time

About the job: 

We’re looking for a talented Backend Developer who can help to build and maintain the technology that powers our products. The role will be based in London, where we’re building out the HQ office.

About the company is a global e-commerce app company. We’re bootstrapped, profitable, and growing fast.
Our flagship app, Product Reviews, is ranked first in Shopify's App Store, with over 15,000 five-star reviews. We’ve grown rapidly since our founding purely by word of mouth. We’ve never invested in any paid marketing.
Our team of more than 50 is international, diverse, and spread across London, UK (our headquarters); Saigon, Vietnam; Casablanca, Morocco; and Lima, Peru.
We make a global impact, with over 250k shops actively using our software in more than 140 countries. We fulfill over 60 million orders monthly and generate over 1 million verified buyer reviews per month.


  • Assist in designing, developing, testing, maintaining, and improving the system.
  • Participate in product planning management discussions for a better understanding of the company's products.
  • Being user-oriented when delivering features and developer-oriented when delivering codes.
  • Reviewing the code of others to identify potential inefficient codes.
  • Self-management and delivery of features without hand-holding.
  • Training, mentoring, and managing our junior developers.


  • 3 to 5+ years’ experience in a senior role. Any programming languages.
  • Good problem-solving skills with an understanding of data structures and algorithms.
  • Security and performance awareness.
  • Familiarity with coding standards and best practices.
  • Self-management and self-motivation.
  • Great English, both verbal and written.

The Ideal Candidate will have
  • A Bachelor’s degree in Computer Science or similar.
  • Experience with production troubleshooting, monitoring systems, and managing large production infrastructure.
  • Experience with Linux, command line, and scripting (Bash, Python).
  • Experience with our tech stack:
          Ruby, Rails, Sidekiq
          PostgreSQL, ElasticSearch
          AWS services, e.g. EC2, EB, ES, S3
          MongoDB, Redis
          Git, GitHub, GitHub flow
          NewRelic, Kibana, Cloudwatch
          CircleCI, GitHub Action
  • Familiarity with cutting-edge technologies, big data, or artificial intelligence algorithms.
  • An investment mentality, and want to build for the long term.

Why it is awesome to work with us:

  • We’re a diverse, international, and close-knit team that is growing rapidly.
  • We make products that our customers love.
  • We champion an open culture of continuous improvement, where everyone is heard and criticism is always constructive.
  • Our hours are flexible. There’s no overtime and no dress code. You can wear whatever you want (but wear something, of course).
  • We offer great development and learning opportunities.
  • Healthy codebase and architecture. Few WTF moments when onboarding.
  • Thorough and constructive code review. We will push ourselves toward and learn to write better code together.

Challenging yet interesting problems we are trying to solve:

  • Business: We deliver real business results to e-commerce businesses of all sizes, with our super affordable tool delivering great ROI to customers by improving trust, generating reviews that improve conversion rates on product pages, and generating follow-up sales directly.
  • Performance: at our scale, with tens of millions of requests a day, a simple change makes a meaningful impact.
  • Reliability: We serve over 240,000 shops and generate over 1 million verified buyer reviews monthly, in virtually all of the timezones, 24/7, all year around.
  • Security: To verify the authenticity of reviews, we have access to orders with billions of USD in value every month. With great data, comes great security responsibility.


  • Optional hybrid remote/office working, you spend 2 days per week in the office.
  • Company laptop.
  • Private health package with Vitality.
  • Employee discounts: instant vouchers, cashback, reloadable cards, and the SmartSpending app.
  • Employee Wellbeing Centre: exercise videos, recipes and nutrition, financial guides and tools, and mindfulness videos.
  • 30 days leave including bank holidays; you accrue 2.5 annual leave days per month.
  • Weekly team lunches out, on us.
  • Quarterly team events.

Further information:

  • Office in London, UK
  • Located in Old Street in the heart of Shoreditch, easily accessible, with excellent transport links.

Submit Your Application

You have successfully applied
  • You have errors in applying