i
imusman_sarwar

Usman Sarwar

@imusman_sarwar

Lead Mobile App Engineer

Pakistan
English
About me
I am Usman Sarwar—a software engineer and mobile application developer with 7+ years building large-scale, SaaS-style products. I am especially strong in React Native (iOS & Android), with deep work in payments, fintech flows, PAX / POS hardware, and real-time systems (MQTT, sockets). I also ship web stacks where the product needs them, and I use AI-assisted engineering thoughtfully—agents, LLMs, and modern tooling—with review, security, and maintainability.... Read more

Skills

i
imusman_sarwar
Usman Sarwar
Offline • 
Average response time: 1 hour

See my services

Cross-Platform Development
I will mobile app development android app ios flutter react native fintech app creation
From$105 / projectMore details
AI Mobile Apps
I will develop ai mobile app development chatbot integration ios android ai saas, agent
From$220 / projectMore details

Portfolio

Work experience

PSP_Solutions

Lead Mobile Engineer

PSP Solutions • Full-time

Feb 2019 - Present • 7 yrs 3 mos

Leading end-to-end software delivery for mobile and terminal products: quality, stability, and dependable deployments across iOS and Android. Built a complex payment solution for PAX handheld devices with real-time MQTT, deep hardware integration (scanner, printer, security, local storage) via PAX FullIntegration, restaurant table management with Pay at the Table, gift card flows (usage and recharge), and a cross-platform rewards app integrated with the POS ecosystem for multiple merchants.