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Google Pay picks Flutter to drive its world product growth

We hope this offers you a good concept of how one can strategy and launch an entire rewrite of an lively app that’s utilized by thousands and thousands of customers and companies of all sizes. It will not have been potential for us to ship this with out Flutter’s continued advances on the platform. Big because of the Flutter workforce, as right now, we’re standing on their shoulders!

When absolutely migrated, Google Pay will likely be one of many largest manufacturing deployments on the Flutter platform. We stay up for sharing extra learnings from our transition to Flutter sooner or later.


Posted by David Ko, Engineering Director; Jeff Lim, Software program Engineer; Pankaj Gupta, Director of Engineering; Will Horn, Software program Engineer

Three years in the past, after we launched Google Pay India (then referred to as Tez), our imaginative and prescient was to create a easy and safe cost app for everybody in India. We began with the premise of creating funds easy and constructed a consumer interface that made making funds as simple as beginning a dialog. The simplicity of the design resonated with customers immediately and over time, now we have added performance to assist customers do extra than simply make funds. Right this moment customers pays their payments, recharge their telephones, get loans immediately by means of banks, purchase prepare tickets and rather more all inside the app. Final 12 months, we additionally launched the Spot Platform in India, which permits retailers to create branded experiences inside the Google Pay app to allow them to join with their clients in a extra participating manner.

As we checked out scaling our learnings from India to different components of the world, we wished to concentrate on a quick and environment friendly growth setting, which was fashionable and interesting with the flexibleness wanted to maintain the UI clear. And extra importantly one which enabled us to write down as soon as and have the ability to deploy to each iOS and Android reaching the big variety of customers.

It was clear that we would wish to construct it, and be certain that it labored throughout all kinds of cost rails, infrastructure, and working techniques. However with the momentum we had for Google Pay in India, and the quick evolving product options – we had restricted engineering assets to place behind this effort.

After evaluating varied choices, it was simple to choose Flutter as the apparent alternative. The three issues that made it click on for us had been:

We might write as soon as in Dart and deploy on each iOS and Android, which led to a uniform best-in-class expertise on each Android and iOS;

Simply-in-Time compiler with scorching reload throughout growth enabled speedy iteration on UI which tremendously elevated developer effectivity; and

Forward-of-time compilation ensured excessive efficiency deployment.

Now the duty was to get it carried out. We began with a small workforce of three software program engineers from each Android and iOS. These days had been centered and intense. To begin with we created a vertical slice of the app — dwelling web page, chat, and funds (with the vital native plugins for funds in India). The workforce first tried a hybrid strategy, after which determined to do a clear rewrite because it was not scalable.

We ran a couple of small sprints for different engineers on the workforce to present them a possibility to rewrite one thing in Flutter and supply suggestions. Everybody cherished Flutter — you possibly can see the joys on folks’s faces as they talked about how briskly it was to construct a consumer interface. One of the vital thrilling issues was that the workforce might get on the spot suggestions whereas growing. We might additionally leverage the top quality widgets that Flutter offered to make growth simpler.

After fastidiously weighing the dangers and our case for migration, we determined to go all in with Flutter. It was a monumental rewrite of a shifting goal, and the prevailing app continues to evolve whereas we had been rewriting options. After many months of onerous work, Google Pay Flutter implementation is now out there in open beta in India and Singapore. Our customers in India and Singapore can go to the Google Play Retailer web page for Google Pay to choose into the beta program and expertise the newest app constructed on Flutter. Subsequent, we’re trying ahead to launching Google Pay on Flutter to everybody the world over on iOS and Android.

We hope this offers you a good concept of how one can strategy and launch an entire rewrite of an lively app that’s utilized by thousands and thousands of customers and companies of all sizes. It will not have been potential for us to ship this with out Flutter’s continued advances on the platform. Big because of the Flutter workforce, as right now, we’re standing on their shoulders!

When absolutely migrated, Google Pay will likely be one of many largest manufacturing deployments on the Flutter platform. We stay up for sharing extra learnings from our transition to Flutter sooner or later.


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