The Deliveroo engineering team blog

Only awesome code.

Testing with Third Party Services in Go

Taking advantage of Golang’s duck typed interfaces and net/http/httptest to test third party dependencies in web applications.

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Recent Articles

Building a Payments Lambda with Terraform

While integrating with a new payment provider, we needed to sync merchant ids via SFTP. We built an AWS Lambda function with Terraform to do this. I’ll walk through our Terraform configuration and the hurdles we overcame around accessing the S3 bucket and retrieving sensitive credentials.

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Optimising a simple ActiveRecord query

Last week a seemingly simple ActiveRecord query was causing problems on production, by being incredibly slow. Together with my colleague Marty I debugged the issue and as a result we decreased the query time from about 80 seconds to about 100 milliseconds.

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How to migrate your API and still be friends with your fellow client developers

One of the best things about working in Deliveroo Engineering is that we have the opportunity to work on a great ever-changing product, which means we are constantly evolving, improving and facing new challenges. One of the main problems we have right now, which is a great problem to have, is the fact that we have grown so much that our monolithic application can’t hold everything in just one place anymore.

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