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React Native 0.77 just dropped with over 1,061 commits from 161 contributors. The team is bringing web-standard CSS properties to mobile and making a bold move to Swift for iOS templates.

Muhammad Zuhriyan Sauqi from IDN Engineering makes a bold case: RxJava isn't dead in 2025, it's just misunderstood. While Kotlin Coroutines dominate modern Android development, he argues there's still a compell...

Google Maps just pulled back the curtain on how they deliver smooth experiences across Android's massive device fragmentation. The secret? Performance Class.

Husein Murtadlo from IDN Engineering shows how RevenueCat can replace Google Play Billing Library's complexity with just a few lines of Kotlin code. If you've ever wrestled with in-app purchase implementation, ...

Merpay just migrated hundreds of payment screens to modern UI frameworks while keeping their app running in production. Here's how they managed a 2-year engineering transformation.

The article content appears to be missing, but based on the title and page structure, this looks like a Callstack piece on Kotlin Multiplatform and Compose. Unfortunately, the actual article text didn't load.

Translating Java to Kotlin at Scale

Company: Meta · Dec 18, 2024
Platform: Android

Meta is rewriting 10 million lines of perfectly good Java code into Kotlin. Why would anyone do that?

Duolingo's engineers were stuck waiting 50 minutes for every CI build. That's hundreds of hours wasted every week across the team.

Coinbase cut network requests by 64% during traffic spikes without degrading user experience. Here's how they engineered their way to massive scale.

Reddit just proved that Android's built-in performance tools can deliver massive wins without custom engineering. Their app startup improvements are eye-opening.

Back Market slashed their Android app startup time by 60%. Here's the engineering breakdown that made it happen.

Victoria Perelló and Hernán Malatini from Glovo shipped three major social features in 90 days—without breaking their app. Their secret? An architecture that let 10+ teams work in parallel without stepping on e...

Upgrading React Native in a brownfield app isn't just harder than a greenfield project. It's a completely different beast that most teams underestimate.

Discord wanted to measure Voice Messages impact, but A/B testing would break the feature. Network effects meant users in control groups couldn't receive voice messages from treatment users.

Why do engineering teams obsess over shaving megabytes off their apps? A Reddit thread reveals the hidden costs of bloat.

Callstack reveals how to add React Native to existing native apps without a full rewrite. This brownfield approach is changing how engineering teams think about cross-platform development.

How We Reduced GrabX SDK Initialisation Time

Company: Grab · Nov 22, 2024
Platform: iOS / Android

Grab's SDK was taking 4 minutes to initialize with 400MB of config data. That's a cold start problem that kills autoscaling.

Fauzi Mubarok from IDN Engineering wraps up his floating view series with the polish that separates good Android UIs from great ones. That magnetic snap-to-edge effect you see in TikTok and Shopee? Here's how t...

Fauzi Mubarok from IDN Engineering breaks down how to build those addictive floating reward bubbles you see in TikTok and Shopee. Turns out, creating smooth overlay views in Android requires some clever system-...

Callstack reveals how brownfield React Native integration lets you modernize native apps without the dreaded full rewrite. This collection of insights shows exactly how companies like Shopify and Zalando pulled...

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