https://neeleshyadav.in/blogs Engineering write-ups on React Native, React, performance, real-time systems, and shipping production mobile + web apps. en-us Fri, 17 Jul 2026 03:47:08 GMT https://neeleshyadav.in/blogs/in-app-purchases-react-native https://neeleshyadav.in/blogs/in-app-purchases-react-native Fri, 01 May 2026 12:00:00 GMT Wiring App Store and Play Billing into a React Native app with react-native-iap or RevenueCat — covering product setup, server-side receipt validation, restore purchases, the introductory-offer trap on iOS, and why client-side entitlement is always a lie. React Native IAP Subscriptions Monetization https://neeleshyadav.in/blogs/push-notifications-react-native-fcm-apns https://neeleshyadav.in/blogs/push-notifications-react-native-fcm-apns Wed, 01 Apr 2026 12:00:00 GMT End-to-end push notification setup for React Native using Firebase Cloud Messaging on Android and APNs via FCM on iOS — covering token rotation, background handlers, deep links, notification channels, and the silent failures nobody documents. React Native Push Notifications Firebase FCM APNs https://neeleshyadav.in/blogs/reanimated-v4-60fps-reels https://neeleshyadav.in/blogs/reanimated-v4-60fps-reels Wed, 01 Apr 2026 12:00:00 GMT How we rebuilt the Yoke Reels feed to hold 60fps on a Snapdragon 665 — covering Reanimated v4 worklets, useAnimatedScrollHandler, runOnJS bridging, and the lifecycle-aware playback trick that cut RAM by ~30%. React Native Reanimated Animation Performance https://neeleshyadav.in/blogs/mmkv-vs-asyncstorage-react-native https://neeleshyadav.in/blogs/mmkv-vs-asyncstorage-react-native Sun, 01 Mar 2026 12:00:00 GMT When to use MMKV, when to stick with AsyncStorage, and how to migrate without losing user data. A practical comparison from running both in production on Soul33, plus the secure-storage gotcha you don't want to learn at submission time. React Native MMKV AsyncStorage Persistence https://neeleshyadav.in/blogs/fastlane-ci-cd-react-native https://neeleshyadav.in/blogs/fastlane-ci-cd-react-native Sun, 01 Mar 2026 12:00:00 GMT How to wire Fastlane + GitHub Actions so every merge to main builds, signs, and ships a release candidate to TestFlight Internal and Play Internal Testing. Includes match for cert sync, the credentials JSON Play wants, and the cache that cuts build time by ~40%. React Native CI/CD Fastlane GitHub Actions Deployment https://neeleshyadav.in/blogs/sign-in-with-apple-react-native https://neeleshyadav.in/blogs/sign-in-with-apple-react-native Sat, 01 Mar 2025 12:00:00 GMT A complete walkthrough of integrating Sign In with Apple using @invertase/react-native-apple-authentication — covering Xcode capability setup, Android workaround via JWT, private email relay, credential state handling, and App Store compliance gotchas. React Native Authentication iOS Apple Security https://neeleshyadav.in/blogs/google-sign-in-react-native https://neeleshyadav.in/blogs/google-sign-in-react-native Sat, 01 Mar 2025 12:00:00 GMT Everything you need to implement Google Sign In using @react-native-google-signin/google-signin — from SHA-1 fingerprint setup and OAuth client IDs, to silent sign-in, token refresh, Play Integrity, and the iOS URL scheme trap that breaks half of all setups. React Native Authentication Google OAuth Android https://neeleshyadav.in/blogs/deploy-react-native-app-store https://neeleshyadav.in/blogs/deploy-react-native-app-store Sat, 01 Mar 2025 12:00:00 GMT A step-by-step production deployment guide for iOS — covering Apple Developer account setup, certificates, provisioning profiles, Xcode archive, TestFlight distribution, App Store Connect metadata, and the review gotchas that cause most first-time rejections. React Native iOS App Store Xcode Deployment https://neeleshyadav.in/blogs/deploy-react-native-google-play https://neeleshyadav.in/blogs/deploy-react-native-google-play Sat, 01 Mar 2025 12:00:00 GMT The complete production deployment guide for Android — covering keystore generation, Gradle signing config, AAB builds in Android Studio, Play Console setup, internal/closed/open tracks, Play App Signing, and avoiding the policy violations that get new apps suspended. React Native Android Google Play Android Studio Deployment https://neeleshyadav.in/blogs/rn-new-architecture https://neeleshyadav.in/blogs/rn-new-architecture Thu, 01 Feb 2024 12:00:00 GMT How enabling the New React Native Architecture improved Soul33's runtime performance by 40% — a real migration story covering JSI, Fabric, TurboModules, and the 40+ library audit I did before touching a single line. React Native Performance Architecture TypeScript https://neeleshyadav.in/blogs/websocket-chat-rn https://neeleshyadav.in/blogs/websocket-chat-rn Mon, 01 Jan 2024 12:00:00 GMT Lessons from building a production WebSocket group chat supporting 200+ concurrent sessions — covering connection lifecycle, offline queuing, message deduplication, swipe-to-reply, and audio messages. WebSocket Real-time React Native Redux https://neeleshyadav.in/blogs/ar-tryon-threejs-mediapipe https://neeleshyadav.in/blogs/ar-tryon-threejs-mediapipe Fri, 01 Dec 2023 12:00:00 GMT How I shipped a real-time AR lipstick try-on for Barva Skin Therapie using Three.js and MediaPipe Face Landmarker inside a React Native WebView — no native AR SDK needed. AR Three.js MediaPipe React Native https://neeleshyadav.in/blogs/flatlist-optimization https://neeleshyadav.in/blogs/flatlist-optimization Wed, 01 Nov 2023 12:00:00 GMT A practical guide to memoisation, getItemLayout, windowSize, and keyExtractor techniques that eliminated 40% of unnecessary re-renders in a 100-screen React Native app. Performance React Native FlatList Memoisation https://neeleshyadav.in/blogs/nextjs-vs-vite https://neeleshyadav.in/blogs/nextjs-vs-vite Sun, 01 Oct 2023 12:00:00 GMT A practical, opinionated comparison of Next.js and Vite + React based on shipping both in production — covering SSR, SSG, bundle size, DX, and the exact decision matrix I now use on every project. Next.js Vite React Web Performance https://neeleshyadav.in/blogs/tailwind-at-scale https://neeleshyadav.in/blogs/tailwind-at-scale Fri, 01 Sep 2023 12:00:00 GMT How I structure Tailwind CSS in large React projects without creating utility soup — covering cva for variants, design tokens in config, and the abstraction boundary rule that keeps codebases clean. Tailwind CSS React CSS Architecture DX