X relaunches its Android app after a year-long rewrite from scratch; Nikita Bier calls it “one of the largest engineering projects” in the company's history
TechCrunchSarah Perez
Context & Ripple Effects
X's mobile rebuild is part of a broader product reset under head of product Nikita Bier, whose remit has included restoring the platform's product appeal. It follows X's phased rebuild of its ad platform, suggesting the company is replacing core product and monetization infrastructure in parallel.
The move matters because Android is a primary client surface: a full rewrite gives X a new base for future interface, recommendation and media changes, while also shifting execution risk to the newly rebuilt app.
First-order effects
Android users move onto X's rewritten client, while X's mobile engineering team inherits responsibility for stabilizing and iterating on a new codebase.
X has also migrated away from Tenor to another GIF provider, immediately changing a dependency in the Android app's media experience.
Second-order effects
A rebuilt Android client can make it easier for X to ship product changes alongside its evolving ad systems, but any regressions or feature gaps would make retention and advertiser-facing product work harder.
The provider switch reduces Tenor's role in X's Android experience and requires the replacement service to meet the app's GIF search and delivery needs.
Third-order effects
If X can sustain coordinated rewrites across client and ad infrastructure, its competitive position will depend less on patching legacy systems and more on how quickly it can turn that foundation into differentiated product changes.
The pattern points to a broader rebuilding cycle at social platforms: infrastructure modernization can enable faster experimentation, but only if reliability survives the transition.
The trend: X's Android relaunch is one data point in a wider shift toward rebuilding core social-app infrastructure to support faster product and monetization iteration.
Today we're announcing the completion of one of the largest engineering projects in the company's history: We rebuilt the X Android app from scratch It's faster, smoother and more reliable. But most of all: it will enable us to build new features at lightning speed. [video]
It's all on hands on deck right now. React with Video, Video Editor, and Spaces are coming very soon. Cashtags, Custom Timelines, and many new features are already live. Going forward, many things will hit Android first. The future is looking bright for X Android users.
finally it was ridiculous that more than 50% of users are actually using android and they were always left behind i believe this will eventually make a positive impact for everyone on X since now we should see better experiences for android users including spaces & livestreams
This was a massive undertaking that took well over a year. Special thanks to the incredible engineers who worked day & night to make it happen: @attilablenesi @geruk @e_matsyuk @zhao0506 @arkann1985 @x_belous @adrian579086 @vcoolish @art_antonov @gilsjulio @theapache64
@attilablenesi ... There are still some rough edges. We're hustling quickly to get features out like hosting Spaces and improve performance on older devices. If you have any feedback, feel free to let us know about any bugs you catch.
“This was a massive undertaking that took well over a year.” Native app development was hard, is hard, and will probably remain hard for complex apps, for good reason. AI helps with a lot of stuff, but it won't magically solve hard engineering problems, exhibit #1