Processing Payments At Scale

at August 23rd, 2016

Groupon recently announced gross billings of $1,492,882,000 for Q2 2016 — that’s about $17M our systems charged every single day this quarter. There is a lot of complexity associated with processing such volume, which we’re going to explore in this blog post. Setup overview Before going into details, let’s first review how our payment system… Read More


Groupon’s Workflow Service, “Backbeat”, Now Open Source

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at April 14th, 2016

Groupon operates globally in 28 countries. In order to stay financially nimble at this scale, the company needs automated processes for just about everything. Groupon’s Financial Engineering Developers (FED) team developed and maintain our system for automating merchant payments. The system has paid millions of merchants billions of dollars. One of the tools that helped… Read More


Codeburner – security-focused static code analysis for everyone

at March 11th, 2016

Last year, the Application Security team set out to improve upon a challenging situation: with a single security team and such a large developer community, how do we keep on top of security analysis for the ever-increasing mountain of code? The answer came about as the result of a GeekOn project to trigger automated static… Read More


Groupon is proud to be a part of the new Node.js Foundation

at June 16th, 2015

We are very excited to see that the Node.js and io.js developer communities have come together, combining their code bases to continue their work within the Node.js Foundation (hosted by the Linux Foundation). Groupon is proud to be among its supporting members. With the creation of a foundation backing Node.js we can ensure that this… Read More


Automated App Performance Testing… Monkeys Not Included

at June 3rd, 2015

At Groupon we want to give our customers the best possible experience when using our mobile apps. A great experience is a fast experience. Achieving a fast experience requires ongoing performance testing. Our purchase order for an infinite number of monkeys was denied, so we’ve chosen to invest in test automation instead. Instead of monkeys… Read More



Groupon Engineering Supports RailsGirls Summer of Code and Open Source

at August 12th, 2014

Rails Girls Summer of Code is a global fellowship program aimed at bringing more diversity into Open Source. Successful applicants from all over the world are paid a monthly stipend, from July-September, to work on Open Source projects of their choice. Groupon Engineering is supporting this great effort contributing as a Bronze Sponsor and recently… Read More