Muhammad
Mozzammel Haque
Building mobile and web products end-to-end — from native performance work down to the microservices behind them. Based in Dhaka, Bangladesh.
02About
I'm a Senior React Native Engineer with 6+ years of experience shipping production mobile and web applications. My work sits across two layers: the native mobile surface — performance, stability, platform quirks — and the backend systems that support it, including microservices, service communication patterns, and API design.
I'm currently building at Arogga Limited in Dhaka, leading front-end architecture for a healthcare app used across Android and iOS. Earlier, at Circle Fintech Limited, I led a front-end team building a fintech platform and a digital banking app for Jamuna Bank.
Outside of day-to-day engineering, I write on Medium about React Native, AI-assisted development, and system design — usually working through a real problem I've run into rather than covering a topic in the abstract.
03What I build
Mobile
React Native apps for Android and iOS, with attention to native performance, crash reduction, and platform-specific debugging.
- React Native
- Redux
- New Architecture
- On-device AI
Backend & architecture
Microservices and the patterns that keep them reliable — service communication, failure handling, and event-driven design.
- Node.js
- NestJS
- GraphQL
- Kafka
- gRPC
- Docker
Web
Typed, componentized front ends built to scale with a growing team and codebase.
- React
- Next.js
- TypeScript
04Experience
- Architected the Arogga app front end for Android and iOS, cutting crash- and delay-related complaints by 30% through performance work.
- Used Redux for state management to keep the app responsive and stable at scale.
- Led a team of 5 designers and developers to ship 3 mobile apps in 6 months — 25% faster time-to-market.
- Led the front-end team, running code reviews and setting development process standards.
- Built the platform front end with React, GraphQL, and TypeScript.
- Contributed to JustPay, a React Native banking app for Jamuna Bank.
- Increased app store ratings by 15% through consistent UX and performance improvements.
- Planned component architecture for predictable, scalable app behavior.
- Shipped a feature that lifted user engagement by 30%, improving retention.
- Integrated multiple payment gateways, including PayPal, Paytm, and Razorpay.
- Optimized user interfaces, cutting page load times by 40%.
Education
05Stack
Languages
Mobile
Web
Backend
Data
Infra & tooling
06Projects
Arogga App
Online medicine ordering app for Android and iOS. Led front-end architecture, UI, and API integration.
JustPay App
Digital banking app built with React Native. Contributed UI design and feature/API development.
Online Shopping in Nepal
E-commerce platform. Contributed UI design and feature/API development and integration.
App Bajar
App marketplace website. Contributed UI design and feature/API development and integration.
connect-rn-components
Open-source React Native component library published under @appscftl.
npmjs.com/package/@appscftl/connect-rn-components07Writing
Notes on React Native, AI-assisted development, and system design, published on Medium.