A selection of mobile apps, APIs, and tools I've built. Each entry is a full case study covering the problem, decisions, and outcome.
An offline-first Flutter field-force management app for agricultural field officers — logging farmer visits, taking orders, and filing collection reports from villages where connectivity is a maybe, not a given.
An offline-first React Native field-operations app for agricultural field officers — GPS-tagged crop programs, dealer registration, and a sync layer resilient enough to survive a major native SDK upgrade without breaking production.
A Flutter daily planner built to validate Clean Architecture + Riverpod patterns outside client constraints — featuring custom gesture-driven timeline UI and offline-first SQLite storage.
A Flutter e-commerce app unifying four incompatible Bangladeshi payment gateways behind one interface, with a local-first cart and connectivity-aware UX built for mid-range devices across the whole country.
Engineering one Flutter codebase to serve two fundamentally different user roles — teachers and students — with concurrent multi-account sessions on a single device, deployed across 80+ educational institutes in Bangladesh.
An open-source Flutter package making bKash payment integration a single function call — serving 65M+ account holders across Bangladesh with token management, WebView lifecycle handling, and JS bridge fallback for OEM quirks.