Technical articles about Android development, Clean Architecture, Jetpack Compose, and more.https://khoivan.dev/vi-vnhttps://khoivan.dev/blog/2026-02-19-tet-nhat-hay-chung-ta-nhat-truoc/https://khoivan.dev/blog/2026-02-19-tet-nhat-hay-chung-ta-nhat-truoc/32 tuổi, tôi tự hỏi: từ khi nào Tết chỉ còn là một dấu chấm trên lịch — hay chính chúng ta đã no trước khi ngồi vào bàn?Thu, 19 Feb 2026 00:00:00 GMTlifetetlifefamilyreflectionvietnamKhoi Vanhttps://khoivan.dev/blog/2025-12-28-our-custom-git-flow/https://khoivan.dev/blog/2025-12-28-our-custom-git-flow/Standard Git Flow breaks when you need to remove a single feature from a release. Here’s the custom workflow we built to solve the real-world problem of surgical rollbacks.Sun, 28 Dec 2025 00:00:00 GMTengineeringgitworkflowdevopsrollbackbankingvietinbankKhoi Vanhttps://khoivan.dev/blog/2025-12-13-mobile-banking-security-weekly-4/https://khoivan.dev/blog/2025-12-13-mobile-banking-security-weekly-4/Android December 2025 critical patch with actively exploited vulnerabilities, iOS 26.2 WebKit zero-days, Google Play US policy changes, and Magisk v30.6 Rust rewriteSat, 13 Dec 2025 00:00:00 GMTengineeringandroidiossecuritybankingweekly-bulletinKhoi Vanhttps://khoivan.dev/blog/2025-10-19-mobile-banking-security-weekly-3/https://khoivan.dev/blog/2025-10-19-mobile-banking-security-weekly-3/Critical API 35 + PBL v7 enforcement, 16KB page size compliance, and iOS 26.0.1 security updatesSun, 19 Oct 2025 00:00:00 GMTengineeringandroidiossecuritybankingweekly-bulletinKhoi Vanhttps://khoivan.dev/blog/2025-09-02-mobile-banking-security-weekly-2/https://khoivan.dev/blog/2025-09-02-mobile-banking-security-weekly-2/16KB page size mandate, iOS zero-day patch, and WebView 140 updates for banking appsTue, 02 Sep 2025 00:00:00 GMTengineeringandroidiossecuritybankingweekly-bulletinKhoi Vanhttps://khoivan.dev/blog/2025-08-17-mobile-platform-intel-on-demand-2025-08-17/https://khoivan.dev/blog/2025-08-17-mobile-platform-intel-on-demand-2025-08-17/Critical Android updates, API requirements, and community reports for mobile banking teamsSun, 17 Aug 2025 00:00:00 GMTengineeringandroidiossecuritybankingweekly-bulletinKhoi Vanhttps://khoivan.dev/blog/building-native-security-library-banking/https://khoivan.dev/blog/building-native-security-library-banking/The story of how I built a C++ security layer to protect sensitive banking data, from basic Java encryption to a full native library with anti-tamperingThu, 09 Jan 2025 00:00:00 GMTengineeringandroidsecurityndkbankingKhoi Vanhttps://khoivan.dev/blog/xml-to-compose-migration-story/https://khoivan.dev/blog/xml-to-compose-migration-story/The real story of migrating a banking Android app to Jetpack Compose - the wins, the failures, and that one time we broke productionWed, 08 Jan 2025 00:00:00 GMTengineeringandroidjetpack-composemigrationuiKhoi Vanhttps://khoivan.dev/blog/my-first-production-crash/https://khoivan.dev/blog/my-first-production-crash/The story of my first major production incident - how a simple SharedPreferences migration brought down a banking app, and what I learned about debugging under pressureTue, 07 Jan 2025 00:00:00 GMTlifedebuggingproductionandroidwar-storiesKhoi Vanhttps://khoivan.dev/blog/debugging-at-2am/https://khoivan.dev/blog/debugging-at-2am/Câu chuyện về một đêm debug production của banking app, và những bài học không có trong sách vởThu, 01 Feb 2024 00:00:00 GMTlifedebuggingproductionlifevietnambankingKhoi Vanhttps://khoivan.dev/blog/from-samsung-to-pixel/https://khoivan.dev/blog/from-samsung-to-pixel/Câu chuyện về paradox của một Android developer và chiếc iPhone trong túiSun, 28 Jan 2024 00:00:00 GMTlifeandroidlifeopiniondevicesKhoi Vanhttps://khoivan.dev/blog/jetpack-compose-best-practices/https://khoivan.dev/blog/jetpack-compose-best-practices/Real performance fixes and gotchas from 2 years of Compose in a banking app with 2M+ usersMon, 15 Jan 2024 00:00:00 GMTengineeringjetpack-composeandroidperformanceproductionKhoi Vanhttps://khoivan.dev/blog/clean-architecture-android/https://khoivan.dev/blog/clean-architecture-android/How we reduced our 8-layer architecture to 3 layers and shipped 2x faster without sacrificing quality in a banking appWed, 10 Jan 2024 00:00:00 GMTengineeringandroidarchitecturebankingpragmaticKhoi Van