About
Zumry Mohamed
Senior Full Stack Developer • 11+ Years • BSc Software Engineering (First Class Honours)
50+Apps Shipped 1M+Users Served 11+Years Building
---Who I Am
I am a Senior Full Stack Developer who has evolved through multiple specializations — from mobile developer to senior engineer, to blockchain app developer, to someone who now fully leverages AI to work smarter and ship faster. The constant through every phase? My love for problem-solving and tackling technologies that scare most people away.
After 11 years of shipping production software, I have entered the most exciting phase of my career. I have learned to work smarter, not harder — using AI tools to amplify a decade of hard-earned expertise. My journey has taught me not just how to code, but how to architect systems that scale, mentor teams effectively, and deliver products that handle real money, real users, and real consequences.
"If you know your enemies and know yourself, you will not be imperiled in a hundred battles." — Sun Tzu
In two words: hard working and never give up. When it comes to work, I am aggressive about getting things done. I diagnose problems quickly, code efficiently, communicate risks early, and always keep the bigger picture in mind.
What I Work With
Mobile — Flutter, Dart, Swift, UIKit, SwiftUI, Kotlin, Android Native, BLE/IoT integration
Backend — Golang, Laravel, Node.js, REST APIs, microservices, PostgreSQL, MySQL
Frontend — React, Next.js, TypeScript, tRPC, Prisma
Cloud & DevOps — AWS, GCP, Firebase, Docker, CI/CD, Xcode Cloud
AI & Automation — Claude Code, LLM integration, MCP servers, agentic workflows, RAG pipelines
Architecture — Clean Architecture, Domain-Driven Design, MVVM, SOLID, modular monoliths, SDK development
Selected Projects
Fintech Wallet & Card Platform
Flutter (iOS & Android) + Laravel 12 REST API + React Admin Panel
A production fintech app powering digital wallets, Visa prepaid cards, PayID deposits, P2P transfers, KYC verification, and multi-currency FX. Built both the mobile app and the entire backend — 65+ endpoints, JWT auth with TOTP 2FA, AES-256 encryption, webhook-driven payment reconciliation, and a full migration from WordPress to standalone Laravel without breaking a single mobile client contract.
WooCommerce Payment Gateway Plugin
PHP • WordPress • WooCommerce Blocks • HMAC-SHA512
Production payment plugin integrating hosted checkout for credit/debit cards (Visa, Mastercard, Amex, UnionPay) and QR wallet payments (Alipay, WeChat Pay, GrabPay, PayNow). Supports both modern Blocks checkout and classic shortcode checkout. PCI DSS SAQ A compliant — card data never touches the merchant's server.
Spectral Sensor BLE App
Flutter • BLE Protocol • Firebase • GetX
Cross-platform app connecting to wearable spectral light dosimeters over Bluetooth Low Energy. Implemented a custom binary BLE protocol — little-endian packet encoding/decoding for 12+ message types with CRC32 validation, paginated session retrieval, and chunked data downloads from device flash. Lifecycle-aware BLE management with auto-disconnect on background and auto-reconnect on resume.
Pet Sitting Marketplace
Flutter • Firebase • Stripe • Google Maps
Two-sided marketplace connecting pet owners with vetted sitters across a full booking lifecycle — discovery, chat, payment, and reviews. Stripe payments with escrow-style holds, geo-based sitter discovery, identity verification, and real-time Firestore queries with priority-based ordering.
Sports Analytics BLE App
Swift • UIKit • Movella DOT IMU • Firebase
Native iOS app turning BLE IMU sensors into a real-time sports performance tool. Jump detection from accelerometer data and wheelchair racing analytics from gyroscope streams. Custom state-machine detectors, CSV session logging with Firebase Storage uploads, and a deterministic replay test harness for validating algorithms without sensor hardware.
Career Path
UQPay (2023 – Present) — Senior Fullstack Developer & Lead. Architecting fintech products across mobile, web, and backend. Built crypto trading platforms, POS terminal solutions, iOS payment SDKs, and merchant admin dashboards.
Gomeeki, Australia (2021 – 2022) — Enterprise SAAS apps for the Australian market. Refactored legacy codebases, improved performance and crash rates across iOS and Android.
Newswav (2020 – 2021) — Senior Mobile Developer for Malaysia's leading news platform. 1M+ users, 4.5+ star ratings, 25% crash rate reduction.
CMS Colombo (2019 – 2020) — Led Agile implementation, mentored junior developers, improved sprint velocity by 25%.
Gapstars (2014 – 2019) — Built and shipped 6+ Netherlands government applications across iOS and Android.
What I Write About
This blog is where I share what I have learned — the hard way, over a decade of building software professionally. You will find posts on AI automation, building AI agents, prompt engineering, AI coding tools, system architecture, and mobile development. No hype. No theory without practice. Just things that actually work.
Want to connect? I am always up for a good technical conversation — reach out on LinkedIn or GitHub.