Prepping to ‘Scout Out’ with Groupon!

at October 5th, 2015

For the third year in a row, Groupon is proud to partner with the Girl Scouts of Greater Chicago and Northwest Indiana to Scout Out Engineering. This fall, we’ll be opening the doors of our Chicago headquarters to 75 of the Scout’s best and brightest 5th and 6th graders to join us for a morning of learning about engineering through presentations from our female tech staff, hands on activities and an intro to coding.

Groupon is taking planning as seriously as rationing the last box of thin mints, so this one is going to be good. This year we’re also expanding the program! The Groupon Scout Out Engineering Planning Team is happy to announce that we’ll be welcoming some of the Pacific Northwest’s coolest troops to participate in the Scout Out program at our Seattle office.

Groupon is committed to supporting women in technology at every age, and we’ve designed this program specifically to help spark girls’ interest in engineering through 5th and 6th grade. We know these are the years when there is the highest potential for girls to lose interest in STEM as compared to their male counterparts. We want to show the future innovators and policy makers that technology is not only cool and fun, but also a world where they can thrive … and is so much bigger than typing at a computer in a row of desks.

This effort is largely supported on a volunteer basis, and we’ve got some of the best staff in the biz. Our tech teams donate their time, energy and resources every year to make sure this event goes off without a hitch. It’s a team effort to make sure that the girls leave our office with their Scout Out merit badge in hand, a comprehensive list of resources to continuing their learning and an excitement about pursuing a career in technology. Don’t let the calm, cool and collected demeanor fool you — the Groupon volunteers are equally as excited to be working alongside the scouts and will be earning their merit badge as well.

We’ll let you know how it goes and can’t wait for another action packed day of merit badge earning and super fun tech learning.

4 Reasons GEEKon (Our Global Internal Hackathon) Rocks at Groupon

at September 21st, 2015

Generic_GEEKon_logoI’ve long been a supporter of facilitating creativity and innovation within the workplace in Tech. Shortly after coming on as Groupon’s CTO, I created our own internal hackathon that occurs every six months and is open to our development offices across the globe…we call it GEEKon. GEEKon celebrates technology at Groupon by giving our teams the chance to innovate bottoms-up and unleash their creativity and passion for collaboration on new and useful solutions for the company. GEEKon lasts for 5 days; 4 days of hacking with a final day of presentations.

Here are 4 reasons why GEEkon rocks at Groupon:

1. Collaboration – GEEKon gives employees the opportunity to work with new people and form new relationships. During the week of GEEKon, teams assimilate from across different areas of the company. People in roles that might never interact normally are thrown together and start building with one another. Not only does this give people a chance to make new friends but gives them a broader view of our company and their connection to the individuals within it.
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2. Good Times – We take the FUN part of GEEKon seriously. Whether it is late night catered dinners, passionate external speakers or rocking out to energetic tunes (each Geekon is musically themed), we all get into the spirit. Employees come to understand that it’s important to work hard at Groupon but it is also vital that they enjoy themselves along the way.
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3. Encourage Outside the Box Thinking – It is easy to get lost in the day to day. GEEKon gives employees the chance to step outside of their normal routine and think in a fresh way about how to solve problems. This results in good things for Groupon but also (hopefully) for the employees, personally.

4. Real Results! – We run GEEKon every six months so employees can have fun, meet new folks and get creative but we also have real products that come out of it. People present projects that improve internal pain points, solve issues that bother them or propose brand new external facing products. We commit to following through on the winning projects, getting the business ideas funded through Groupon Labs or connecting the teams to the right product and engineering people to make their prototype a reality.

This past GEEKon we had more than 100 projects worked on across 8 offices in 5 countries and the projects were fantastic. I can’t wait to see what’s in store for the next one, coming in February 2016!
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Groupon’s New Green!

at August 28th, 2015

It’s not easy being green… even at Groupon.

Groupon is approaching 4 years as a public company and there have been many changes and updates to the site over this time. Recently, we have decided that an update to our signature green color is needed.

As Groupon becomes a true marketplace housing a full variety of inventory, the need to revamp the brand has arisen. The first step we are taking in this effort is to update the brand color, green. New - Pantone Green #53A318The new green (#53A318) is deeper, richer and crisper than the old green (#82B548). The new green will bring a fresh look to the site and make the value proposition more legible.

This effort originates from a desire to offer brand consistency. Groupon’s current header is black on desktop and green on native mobile app. This discrepancy occurred mainly because their design system and UI frameworks were built at different times. Now with the new green on both platform headers, we’re excited that our customers will experience a more unified look and feel across platforms.

So, keep an eye out for a new, crisp and fresh color green on Groupon this fall and be sure to tell us what you think! (tweet @groupon or follow us at

desktop green

Groupon Hosts Girls Who Code

at August 17th, 2015

Screen Shot 2015-08-14 at 11.24.33 AMThis summer, Groupon has been hosting Girls Who Code (GWC) in their Chicago headquarters for a 7-week summer immersion program that aims to increase the number of women in Engineering by teaching high school girls the skills they need to be successful in college and beyond. GWC is a national non-profit organization working to close the gender gap in technology. As a woman working in technology, this non-profit caught my eye when it launched back in 2012 as something that would really make a difference in closing the gender gap. Throughout my career, I’ve been asked to participate or advocate for a large range of efforts focused on improving diversity and culture as it relates to gender in technology. While these efforts are important and necessary, I’ve always felt they weren’t addressing the source of this trend in the US. When thinking about starting this non-profit, Reshma Saujani (the founder and CEO of GWC) looked at the data and honed in on addressing the problem when the drop outs occur (sweet spot 8-9th grade).

While campaigning for the NY seat in the House of Representatives in 2010 and running for New York Public Advocate in 2013, Reshma started seeing a trend of little to no girls in robotics labs and computer science classes as she toured schools in NY. This brought her to the conclusion that this is the biggest domestic issue of this time. Regardless of whether or not you agree with that statement, the numbers are hard to ignore. In the 1980’s 37% of computer science graduates were women. Today, it’s 12%. She points out Steve Jobs probably had more women on his initial Apple team than Mark Zuckerburg has at Facebook today. What’s happening?

Saujani compares this phenomenon to the medical and law fields in the 70’s when 10% of doctors and lawyers were women. Today it’s 50%. What happened? Popular television shows in the U.S. like LA Law, Grey’s Anatomy and Law and Order have arguably altered the perception of these professions for young women. Just like Reshma experienced, if young girls are indoctrinated with images and messages of women who are smart and successful, they say “I want to be that too.” It’s subtle and often subconscious, but it makes a real impact. So why is the opposite happening in technology? Constantly, girls are receiving the message that this is not for them. They are listening, and they are opting out.

Today GWC has 57 programs in 8 cities nationwide and is embedded in companies like Facebook, Square, Twitter and Amazon. Companies don’t see this as charity, but a recruiting effort.

All of the girls in the first GWC cohort majored in computer science, were at the top of their classes and received internships at big tech companies. Today only .4% of girls in high school want to major in CS. Only 7,500 women graduated in computer science last year. 95% of girls leaving the GWC program want to major in CS. As this program grows, we can turn this number around in the next 5 -10 years. That’s an impressive start to this initiative.

When asked what people can do to help, Reshma advised women in the industry to be advocates for one another and give back by mentoring or volunteering for GWC. She strongly states, “I have committed my work and life to mentoring women. We all have an obligation to do that.”

For those not in the technology industry, most people have young girls in their lives. She advises us all to encourage girls into STEM fields. This can be accomplished by buying them a Goldiblox set or talking to them about the interesting problems they can solve with technology. We all need to be evangelists on this issue. I was recently having a conversation with my 6 year old cousin and I asked her what her favorite subject was in school. She proudly announced it was Math. Remembering what Reshma said, I went a bit overboard telling her how awesome that would be and all the interesting problems she could solve. I’ll have to remember to have that conversation again when she reaches 8th grade.
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Groupon Releases Its New Apple Watch App!

at June 29th, 2015

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Groupon iOS App version 3.12 went live this week and our mobile team packed it full of whiz bang features. Most notably, the new Groupon Apple Watch app was included and it has generated a bit of buzz. Partial though I might be, I am proud to say it’s my favorite app on Apple Watch today. But, don’t take my word for it. Check out the video we made to show it off.

One of the most challenging aspects of working on this app was that the team started prototyping it back in January, long before the Apple Watch was available to the public. You can imagine that the use cases for a watch app are vastly different than those for a mobile app and developing this with only the use of simulators (which have their own set of limitations) took much hard work and ingenuity.

Screen Shot 2015-06-26 at 9.41.37 AMThe team figured out some cool features just by being bold and trying things. For example, without much Apple documentation, they determined how to access a users location on the watch when the phone is in background mode. Our team decided to wait to release until the Apple Watch was out and they were able to do some final fit and finish work. This resulted in being able to separate ourselves out from the pack in terms of having an elegant and functional working app from the get go.

We are just getting started, though. The team has a few main areas they want to focus on for future iterations. They are supporting the next version of Watch OS, nailing proximity location and redemption and further refining the purchasing process. As I said in our recent press release: “We’re very excited about the potential of this new technology to increase the buying power of our customers and drive even more business to local merchants.”

Kudos to our hard working and talented mobile team and the larger Groupon tech community that made this all happen! I am proud to be part of this organization!

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 already thriving community will have continued growth and success far into the future.

Here at Groupon we believe that open collaboration is what leads to real innovation in the technology community. As I quoted in the press release Node.js infrastructure has been extremely important to us and is core to our platform.

Last year we completed a year-long project to migrate Groupon’s U.S. web traffic from a monolithic Ruby on Rails application to a new Node.js stack with substantial results. Since then we have moved all of our Mobile Web traffic and international traffic onto the same platform as well.

We have been participating and working with the Node.js community for several years now. By becoming a Node.js Foundation member, we’re able to give back to open source even more and support a technology that continues to drive Groupon’s business forward.

Groupon Recognized as a Top Mobile Company by Internet Retailer

at June 5th, 2015


Internet Retailer, which is one the largest ecommerce trade publications in the world, has honored Groupon as a leader in mobile commerce.

At the inaugural Internet Retailer Excellence Awards, Groupon won the Mobile Commerce Award––beating out Amazon, Target and QVC. The Mobile Commerce Award is given out to the retailer showing the greatest creativity, performance and sales growth from a mobile-specific website and/or app.

Dan Roarty, SVP of Marketplace, accepted the award and gave a few brief remarks as to why Groupon has been so successful in the world of mobile.

“At Groupon we think of our mobile experience as the great enabler for what is fast becoming an on-demand economy,” Roarty told the audience. “Whether its products, transportation, restaurants, spas or entertainment, consumers expect high quality and fast service at great value whenever they want it. Groupon is extremely fortunate that our business lends itself to this trend.”

It’s easy to see why the panel of esteemed judges chose Groupon as the first winner of this award. In under seven years, we’ve seen our business transform itself from a deal-of-the-day, delivered via email, to a mobile centric marketplace with hundreds of thousands of merchants selling billions of dollars of products and services to nearly 105 million people who have downloaded our app in 42 countries around the world.

“We’re excited to be part of the mobile transformation, and we will continue to push the boundaries in removing friction for customers and merchants alike by connecting local commerce in ways that never seemed possible before,” Roarty added.

Congratulations to the Groupon development team and everyone involved with Groupon’s award-winning mobile marketplace!

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 with stopwatches, we are using a combination of RoboRemote and Testdroid. RoboRemote is a remote control test framework for Android that utilizes UiAutomator and Robotium to control the application under test. RoboRemote sets application state, closes or restarts the application, monitors android debug bridge (ADB) logs and performs other steps necessary for repeatable and reliable tests.

Frameworks like Robotium or UiAutomator are great, but on their own a test automator has limited ability to do fun things like upgrading the app under test, clear app data or even reboot the device/emulator during a test. With RoboRemote (and other remote control frameworks such as Appium) an automator has a lot more freedom with direct access to ADB and the ability to run other commands on the host system. This flexibility comes in handy when you need to do something like setting initial application state for your performance tests.

Testdroid gives us the ability to run our automation on real devices whenever we want to. With the tools provided we can see useful information like cpu and memory usage after our tests conclude. Also we have the peace of mind that the devices will be available and managed for us. No one has to go into a room with a wall full of devices just to reboot one that was behaving erratically. We always know that we can walk into the office in the morning and see the results of our test automation. In other words, Testdroid gives us an efficient and reliable set of monkeys for our app performance test needs.

What is Being Measured?
If this is your first foray into mobile application performance testing then you may be wondering what should actually be measured or how to add markers/data points in your application. There are generally two parts to this.

  1. Define your metrics. For our example we are measuring application startup time, but that is a very general definition of the measurement. There is no universal definition of application startup time. You must define the metric for your application. It should be tied to an event where your user can start interacting with your app in a meaningful way. Using Groupon’s application as an example we would define it as being when the list of deals is shown to a customer. Even this definition is not specific enough. It still leaves room for interpretation. Does it mean we are measuring the time from when the user taps our icon to the main activity being started, or when we received a deal list from the server and rendered it, or when our images actually loaded and rendered? Remember that your choice of what to measure will subtly influence what your team works on optimizing. Choose wisely!
  2. Add the measurement. You may already have a fancy logging platform such as Splunk. In that case it should be as simple as identifying the right start/end point in your code and then log the time to your logging platform. If you don’t have a fancy logging platform you can simply log the results to logcat and post process the information.

How do the Performance Tests Work?
For this example we’ll be focusing on app startup performance, however the methodology can be applied to any part of your application. We’ll first run through the basic steps for the test and then dive into what the tests are measuring.

Step 1 – Setup your application’s basic state. For Groupon, a monkey has set our current location and dismissed any introductory screens.

Step 2 – Start your application.

Step 3 – Wait until your application gets to a known state. In Groupon’s case we wait for our deal list to load.

Step 4 – Exit the application. This step may vary depending on what you are trying to measure. For this example we are simply forcing the application to be closed. If your application caches data then you may needed to take some additional steps to clear that data. This all depends on what you are trying to measure.

Step 5 – Go back to step 2 and repeat X number of times. The more repeats the better.

Step 6 – Query your metrics platform (in our case Splunk) for all of the data generated during your tests. If you don’t have a platform for this then an alternative would be to log the data to the console and collect it via logcat. At Groupon we integrate this step within our Jenkins build by utilizing the Testdroid API to determine when our tests have finished executing and then firing off an API request to Splunk to collect the data.

Step 7 – Graph the data over time and evaluate it for any performance boosts or regressions. A very basic graph is shown below.

Everything you just read is an example of how Groupon approaches mobile performance testing. You should utilize the information to tailor your own strategy to mobile app performance testing. The important things to remember are:

  • Automation on real devices provides repeatability
  • You should have a well thought out metric to test
  • Finance will not let you get an infinite amount of monkeys

If you have questions about mobile performance testing please feel free to contact me at

There are many more great open source projects from the engineers at Groupon such as –

Odo – A mock proxy server for your automation, manual testing or development needs.
DotCI – Bringing the ease of configuration from cloud systems like travisi and the runtime configuration of docker to jenkins.
Testium – Integration testing for nodejs

Additional projects can be found at Groupon’s github page. If you are interested in positions at Groupon or think you can build a more effective automated monkey then please visit

This post has been cross-posted to the Testdroid Blog.

HashiCorp Announces Vault, a Tool for Managing Secrets

at May 22nd, 2015

Sean Chittenden (Groupon Production Operations) invited Armon Dadgar from HashiCorp to give a Tech Talk about Vault, a new secrets management tool. Armon both unveiled Vault from our office and discussed its importance in securing and managing secrets in a modern datacenter. The implications of Vault’s new approach to this old problem are far reaching and could benefit engineering teams. We were delighted by the understanding HashiCorp brought to this problem space and are excited to see where this technology goes.

Thank you to Armon and HashiCorp for taking the time to share Vault with Groupon Engineering.

First Kill Bill hackathon

at April 17th, 2015

Groupon recently hosted a Payments Tech Talk where Stéphane and I went over our progress deploying Kill Bill internationally at Groupon, and what our roadmap for the rest of the year looks like. To our surprise, most attendees were engineers, and while we went over the architecture of Kill Bill, there was clearly an ask to dig deeper into the code. This is why we came up with the idea of a hackathon, which Groupon hosted in their San Francisco office last Saturday.

Because it was our first event of such kind, we decided to invite only engineers from a few select companies which we knew were already in the process of switching to Kill Bill and were familiar with the system. The event lasted from 11am to 7pm: Stéphane and I covered two brief technical sessions, but the rest of the afternoon was focused on coding and answering questions.

The day turned out to be quite productive: Greg wrote the first ever Kill Bill plugin in Scala, Sean gave Kaui a much needed facelift, and Ivan updated the Node.js client. We also had design discussions leading to API changes for 0.13.7 and talked about migration best practices. Even Stéphane and I managed to get some coding done: he wrote a performance benchmark testing specifically usage APIs, and I worked on automatic deployments of our Docker image to EC2 using Cloud 66.

The most exciting part of the day for me was when I realized the breadth of the ecosystem. When, at the beginning, we were all brainstorming about the type of projects to work on, quite a few ideas were generated, such as a Go client library, Chef recipes for deployment, and a new admin UI in AngularJS. While the very core of Kill Bill is a Java library, you don’t need to know Java to contribute to the project, and whether you are a back-end or front-end developer, whether you know Python or Rust, you can be part of the Kill Bill developer community (and if you want to do this as your full-time job, Groupon is hiring!).

We’re happy the event was a success, and we’ve already been asked to organize a follow-up one. This will happen at some point in the summer, and we will probably open it to a bigger audience. If you want to participate, get in touch!