Hello, I'm

MUHAMMAD USAMA

Senior Full-Stack Engineer shipping production SaaS — AI platforms, healthcare systems, and mobile apps — from idea to launch.

  • Web & mobile apps shipped to production
  • End-to-end ownership — requirements to launch
  • Frontend, backend, and cloud infra
View Proof of WorkSkillsResume
Muhammad Usama — Senior Full-Stack Engineer
Full-Stack · Product Builder
Founding Engineer · Stackex
SaaS · AI · Healthcare
Founding engineer — StackexHealthcare booking & care platformCallstrike · AI security platformBig-Brain-Chat · SMS AI botsAvailable for roles & projects

Experience

My professional journey building production software.

Stackex logo
StackexNow

Senior Full Stack Software Engineer

Jan 2026 — Present
Lahore, Pakistan
  • •Founding engineer on an AI platform that generates native React Native/Expo apps from natural language prompts, with live in-browser preview.
  • •Owned the technical architecture end-to-end: NestJS/PostgreSQL backend, an AI agent execution layer (plan-and-execute for complex requests, direct-edit mode for small ones), and per-user Docker sandbox infrastructure on Google Cloud.
NestJSNext.jsReact NativeExpoPostgreSQLDockerGoogle CloudOpenAIClaudeRedisNginxLangfuse
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SoftwareSkinwork logo
SoftwareSkinwork

Full Stack Software Engineer

Sep 2022 — May 2026
Lahore, Pakistan
  • •Designed, developed, and maintained production SaaS web and mobile applications using React, Next.js, FastAPI, NestJS, and React Native.
  • •Delivered end-to-end features from requirements gathering and system design to development, deployment, and ongoing maintenance for international clients.
  • •Developed scalable backend services and integrated enterprise platforms including Stripe, Twilio, Okta, Slack, Google Workspace, Microsoft Graph, Vapi, and MediRecords.
  • •Architected and maintained cloud infrastructure on Google Cloud using Docker and Nginx to support secure, scalable multi-tenant SaaS deployments.
ReactNext.jsFastAPINestJSReact NativePythonTypescriptDockerGoogle CloudStripeTwilioFirebaseOktaSlackVapi
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Smart A&I Solutions (Pvt) Ltd logo
Smart A&I Solutions (Pvt) Ltd

MERN Developer

Feb 2022 — Jul 2022
Lahore, Pakistan
  • •Built MERN stack web applications and contributed to Python (Django) backend services in collaboration with machine learning and computer vision teams.
  • •Built REST APIs, implemented frontend features, integrated backend services, and contributed to scalable application architecture across multiple client projects.
ReactNode.jsJavascriptMongoDBREST APIsDjango
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Upwork logo
Upwork

Freelance Software Developer

Jan 2021 — Sep 2021
Remote
  • •Developed responsive, pixel-perfect web interfaces using React, HTML, and CSS.
  • •Built reusable React components and modular UI architectures for multiple projects.
ReactJavascriptHTML 5CSS 3
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Projects

Production platforms and applications I've built.

Featured
Stackex
Stackex
Associated with Stackex

AI platform for generating Expo / React Native apps from natural-language prompts, with live in-browser preview and per-user sandbox environments.

Full Stack
SaaS
AI/ML
Callstrike
Callstrike
Associated with SoftwareSkinwork

AI-driven vishing and social engineering training platform that helps organizations train employees against voice-based attacks and deepfake impersonation.

Full Stack
SaaS
AI/ML
DineOS
DineOS
Associated with Stackex

White-label restaurant ordering platform — guest apps (iOS, Android, web), an admin dashboard, and a shared API, deployable per restaurant brand from a single codebase.

Full Stack
SaaS
Mobile Dev
Digital Healthcare Booking & Care Platform
Digital Healthcare Booking & Care Platform
Associated with SoftwareSkinwork

Production healthcare SaaS for the Australian market — patient booking, consultations, payments, and practitioner referral workflows. Built as the sole engineer.

Full Stack
SaaS
Big-Brain-Chat
Big-Brain-Chat
Associated with SoftwareSkinwork

AI-powered platform for creating and managing SMS-based bots that answer questions automatically using OpenAI GPT.

Full Stack
Backend
AI/ML
Kapili Roofing & Painting
Kapili Roofing & Painting
Associated with SoftwareSkinwork

Internal applications that automate roofing and painting operations — report generation, estimate and inspection PDFs, and Google Maps-based inspection tools.

Full Stack
Web Dev
Tandem Experiences
Tandem Experiences
Associated with SoftwareSkinwork

Social discovery platform connecting users with local arts, culture, dining, and events — web, PWA, and native shells.

Mobile Dev
Frontend

What you get

A senior full-stack engineer who can take a product from idea to production alone — web, mobile, backend, and the messy edge cases in between.

01

Web & mobile, shipped to production

I build and have shipped production SaaS web apps and React Native mobile apps — including live App Store releases — not demos or prototypes.

02

End-to-end product ownership

From requirements and system design through edge cases, integrations, deployment, and ongoing maintenance. One engineer who owns the whole path.

03

Full-stack depth that holds up

Frontend, backend, APIs, auth, payments, and cloud infra — React, Next.js, React Native, NestJS, FastAPI, Docker, and Google Cloud in real multi-tenant systems.

Skills

Languages and capabilities I use to ship production SaaS products.

— Foundations

Languages

JavaScriptJavaScript
Primary
TypeScriptTypeScript
Primary
PythonPython
Primary

— How I Build

Capabilities

Each group is a capability I use to ship products — not a list of tutorials.

Frontend

Web and mobile interfaces with React, Next.js, and React Native.

Core
React iconReact
Next.js iconNext.js
React Native iconReact Native
Expo iconExpo
Styling
Tailwind iconTailwind
Material UI iconMaterial UI

Backend

Scalable APIs and server-side systems for production SaaS platforms.

Node.js iconNode.js
NestJS iconNestJS
FastAPI iconFastAPI
Django iconDjango
REST APIs iconREST APIs

Databases

Persistent storage, caching, and session state for multi-tenant apps.

MongoDB iconMongoDB
PostgreSQL iconPostgreSQL
Redis iconRedis

Cloud & DevOps

Containerized deployments and GCE infrastructure on Google Cloud.

Google Cloud iconGoogle Cloud
Docker iconDocker
Nginx iconNginx
Reverse Proxy iconReverse Proxy

AI & LLMs

AI agents, voice systems, and LLM-powered product features.

OpenAI iconOpenAI
Claude iconClaude
Vapi iconVapi
Langfuse iconLangfuse

Integrations

Payments, auth, messaging, and enterprise platform integrations.

Stripe iconStripe
Twilio iconTwilio
Firebase iconFirebase
Clerk iconClerk
OAuth 2.0 iconOAuth 2.0
Okta iconOkta
Slack iconSlack
Google Workspace iconGoogle Workspace
Microsoft Graph iconMicrosoft Graph

— Foundations

Education

Where the engineering craft started — before production SaaS.

COMSATS University Islamabad, Lahore Campus logo
COMSATS University Islamabad, Lahore Campus

Bachelor of Computer Science (BCS)

2018 — 2022Lahore, Pakistan

Built the foundations for full-stack engineering — algorithms, systems, and software design — then carried that into shipping production SaaS.

  • •Core CS foundations in data structures, databases, and software engineering
  • •Hands-on project work that led into professional MERN / Next.js roles
  • •Graduated into industry building web, mobile, and AI-powered products
AlgorithmsDatabasesSoftware EngineeringWeb Systems

Contact

Let's connect and explore collaborations.