A curated portfolio of production software, open-source Android clients, FinTech automation tools, and full-stack systems built by MD Rabbi Hossain.
Automated bKash, Nagad & Rocket Payment Verification
High-speed payment verification platform for Bangladeshi e-commerce merchants. Automatically parses incoming SMS streams and confirms transactions in under 5 seconds with zero fraud and instant merchant webhooks.
Privacy-Centric, Ad-Free Facebook Android Client
Lightweight Android client for Facebook with 3-tier ad blocking (network 656k+ rules, GraphQL filtering, DOM cleaning), full offline caching with byte-range video streaming, AMOLED true black theme, and zero telemetry.
Android Device Analyzer & Hardware Diagnostic Suite
Deep Android diagnostic utility that evaluates phone performance, hardware sensors, screen pixels, audio, camera, and battery wear using real-time hardware tests and an embedded SoC scoring database with PDF/TXT report exports.
Gamified Interactive Learning & Quiz Battle Platform
Full-stack gamified learning platform that turns academic study and quizzes into an RPG questing experience. Features character progression, XP leveling, daily quests, and real-time leaderboards.
Trusted Web Activity Android Client
High-performance Android client for rabbihossainltd.online leveraging Trusted Web Activity (TWA) architecture. Enables full Google OAuth login, shared Chrome sessions, and toolbar-free experience.
Digital Services & E-Commerce Web Portal
Full-stack web application featuring user credit wallets, automated service checkout, support ticket chat, admin controls, and high-performance PWA service worker.
"Rabbi delivered our e-commerce platform and SPV payment verification integration flawlessly. Highly reliable and technically solid developer."
"The security audit and software optimization on our platform uncovered critical bottlenecks. Professional, thorough, and highly knowledgeable."