We considered several approaches and did tech spikes to test many of the ideas - component sharing, feature sharing - always trying to find the right balance between fixing our technical debt problem while continuing to improve the experience for our users.

The team figured out that converging the clients into a single codebase and user experience would be the best way forward. We had many discussions on how to solve these problems. Making the Desktop application accessible, in contrast, would be nearly impossible. We discovered that making our Web Player accessible was going to be a difficult, yet achievable, challenge.

In addition, there were accessibility issues in our clients that we needed to solve. Due to having to implement many of the features twice at different levels of complexity while dealing with context switching, we were not shipping new features at the pace we would have liked to.

But those same engineers were having difficulties with the Desktop client, which used a very diverse range of web technologies (thanks to Conway’s law). The Desktop was our rich, full-featured experience and the Web Player was a much lighter, simpler experience.īecause the Web Player was implemented with a modern React app architecture, we had success onboarding new engineers to the Web Player code. Towards the end of 2018, our team was the owner of a recently built Web Player, as well as Spotify’s Desktop client. We couldn’t build everything we wanted to for our users with our old setup, so we decided to do something about it. For the past couple of years, we’ve been on a mission to modernize our Spotify clients by creating one single desktop UI for both the Desktop application and the Web Player.

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