Articles

Learn from our experience developing the Deliveroo product.

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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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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