--- title: "Ajith T (@4j17h) | Hashnode" description: "Full Stack Developer. Read the latest articles by Ajith T on Hashnode." url: "https://hashnode.com/@4j17h" --- @4j17h # Ajith T @4j17h 路 INDIA 路 Joined February 2022 Full Stack Developer ### [Is Your Vehicle Safe with E20? Check Real User Experiences](https://4j17h.dev/is-your-vehicle-safe-with-e20-check-real-user-experiences?utm_source=hashnode&utm_medium=feed) After hearing countless stories from vehicle owners across India, we started collecting real experiences with E20 fuel. One driver told us his 2014 Swift Dzire's mileage dropped significantly after switching to E20, while another mentioned engine kno... 2 min read 路 [4j17h.dev](https://4j17h.dev/is-your-vehicle-safe-with-e20-check-real-user-experiences?utm_source=hashnode&utm_medium=feed) [Aug 23, 2025](https://hashnode.com/posts/is-your-vehicle-safe-with-e20-check-real-user-experiences/68a95b28d3c19ffb7a6a4260) ### [Reverse-Engineering the Web: How I Turned Bundles into Gold with ReSourceR](https://4j17h.dev/reverse-engineering-the-web-how-i-turned-bundles-into-gold-with-resourcer?utm_source=hashnode&utm_medium=feed) They said it couldn't be done. That you need mad skills + infinite patience to reconstruct minified code. "Lies," I whisper, as ReSourceR rebuilds an entire Next.js app from a single URL in under 10 seconds. 馃毃 The Dirty Truth Every Dev Should Know ... 4 min read 路 [4j17h.dev](https://4j17h.dev/reverse-engineering-the-web-how-i-turned-bundles-into-gold-with-resourcer?utm_source=hashnode&utm_medium=feed) [Jul 16, 2025](https://hashnode.com/posts/reverse-engineering-the-web-how-i-turned-bundles-into-gold-with-resourcer/68772ca821880d31d6deb48f) ### [How to obfuscate sensitive config files in React Native](https://4j17h.dev/how-to-obfuscate-sensitive-config-files-in-react-native?utm_source=hashnode&utm_medium=feed) Even with hermes enabled in release build, there is case where APIs, tokens or keys exposed in index.android.bundle as readable strings, we definitely want to avoid it. So here is a simple way to obfuscate such files: 1) Add javascript-obfuscator pac... 1 min read 路 [4j17h.dev](https://4j17h.dev/how-to-obfuscate-sensitive-config-files-in-react-native?utm_source=hashnode&utm_medium=feed) [Feb 15, 2022](https://hashnode.com/posts/how-to-obfuscate-sensitive-config-files-in-react-native/620bd7657cf10d2765e28117)