U Umais UsmanProduct Engineer
Available for remote roles & select projects

Muhammad
Umais Usman

Senior Full-Stack Developer · Product Engineer — AI-leveraged, stack-flexible.

I take web products from idea to production — SaaS platforms, AI-integrated tools, Chrome extensions and e-commerce — and I build them secure by design and fast by default.

View Selected Work Download Résumé
~5 yearsshipping production web products
Senior SWEat Sundial Tech, Lahore
Founder / CEOZynex Solutions — institute & software services
6 productsselected below — platforms, AI tools, e-commerce
Remote-firstLahore-based, working worldwide
Selected Work

Products in production,
not tutorial projects.

Every project below is real software — shipped, maintained, and used. What it is, what I built, and what it proves.

ProductChrome Extension · MV3

AI Instagram Engagement Scheduler

Role: Founder & sole engineer — Zynex Solutions product

The problemManual, consistent Instagram engagement is hours of repetitive work — and existing automation tools feel robotic and get accounts flagged.

What I builtA commercial Manifest V3 extension that schedules organic engagement with AI-generated context (OpenAI + Gemini APIs). A background service worker runs an alarm-driven queue engine, content scripts work inside Instagram pages, and a React + TypeScript popup handles configuration.

What it provesEnd-to-end product ownership — browser-extension architecture, background scheduling, third-party AI APIs and iterative shipping (now at v2.2.x).

ReactTypeScriptViteManifest V3OpenAI APIGemini API
Private product repository — code walkthrough on request
PlatformMulti-repo system

Zynex Solutions Platform

Role: Founder, CEO & lead engineer

The problemAn institute + services business running courses, batches and payments across disconnected tools.

What I builtA multi-repo platform: public site, LMS frontend (courses, batches, outlines), REST API with PayFast payments & installments, video-lesson management, admin panel — plus an AI chatbot for student and client enquiries.

What it provesRunning a real business on software I architected — and leading its direction as founder, not just its code.

ReactTypeScriptNode.js / ExpressMongoDBPayFastAI Chatbot
Live site
AI PlatformSaaS

CareerForge AI

Role: Designer & full-stack engineer

The problemJob seekers juggle scattered tools for resumes, interview prep and skill planning — none of them talk to each other.

What I builtAn AI career platform: job board, AI resume tools, mock-interview practice, learning paths and a portfolio builder. A NestJS API orchestrates OpenAI/Gemini through LangChain with Qdrant vector search, behind a Next.js frontend, with subscription payments.

What it provesProduction-grade LLM integration — embeddings, semantic search and multi-feature AI orchestration, not a single chatbot demo.

Next.jsNestJSLangChainQdrantSupabaseOpenAI / Gemini
Private repository — code walkthrough on request
ProductionE-commerce · Day job

SundialHome

Role: Senior Software Engineer — Sundial Tech

The problemA live home-décor & furniture marketplace that must keep selling while it evolves — no downtime, no broken checkouts.

What I doUpgrade, optimize and maintain the production platform: new features, performance and UX improvements across Next.js, TypeScript, Node.js and PostgreSQL, with secure authentication and scalable architecture, in an Agile team.

What it provesSenior-level ownership of revenue-critical production software — the discipline of shipping safely, every week.

Next.jsTypeScriptNode.jsPostgreSQLAgile / Scrum
Live site
PlatformClient + API + Admin

Oheo

Role: Full-stack engineer

The problemBusinesses need one place to present themselves, take payments and see how they're doing.

What I builtA three-part platform — client app, API and admin panel: business profiles, JWT auth plus social login (Google, Facebook, Apple), Stripe payments and a chart-based admin dashboard.

What it provesComplete platform thinking: multiple auth strategies, payments and an operator's view, delivered as one coherent system.

ReactRedux ToolkitNode.js / ExpressMongoDBStripeJWT + OAuth
Private repository — code walkthrough on request
MarketplaceMERN

Pak Classified

Role: Full-stack engineer

The problem → build → proofCar buyers and sellers across Pakistan needed a dedicated classifieds platform. I built a nationwide car-ad marketplace on the MERN stack — secure JWT authentication, ad posting with image uploads, and advanced category & region search filters. It demonstrates the fundamentals done properly: auth, media handling and search over real listing data.

MongoDBExpressReactNode.jsJWT AuthImage Uploads
GitHub All projects on GitHub
What I Can Build For You

Hiring an engineer, or
building a product?

For founders and business owners: you bring the problem, I own the build end-to-end — and you get software your business can actually run on.

Web Applications & SaaS MVPs

The platform your idea needs — designed, built and launched, with the accounts, dashboards and billing a real product requires.

  • Customer accounts, roles & admin panels
  • Subscriptions & payments (Stripe, PayFast)
  • Built to grow past the MVP, not rebuilt after it

AI Feature Integration

Practical AI inside your existing product — chatbots that answer from your data, smart search, and content tools your customers actually use.

  • OpenAI, Claude & Gemini API integration
  • Semantic search & embeddings (vector DBs)
  • AI chatbots for support & lead capture

Chrome Extensions & Automation

Tools that remove repetitive work — browser extensions, scheduled workflows and bots that run quietly in the background of your team's day.

  • Manifest V3 extensions, end-to-end
  • Scheduled queues & background processing
  • API-driven workflow automation

E-Commerce & Business Platforms

Stores and business systems that stay fast and trustworthy under real customers — the kind of platform I maintain in production today.

  • Storefronts, catalogs & checkout flows
  • Performance & UX upgrades on live stores
  • Dashboards that show the numbers that matter
Security & Performance

Built secure. Built fast.
Like I do.

Most portfolios talk about features. This is how I build underneath them — because a product that leaks data or loads slowly isn't finished, whatever it does.

Secure by design

Security is a build-time decision, not a patch. In my production work that means:

  • Authentication done properly — JWT and OAuth flows (Google, Facebook, Apple), hashed credentials, protected routes.
  • Access control on every endpoint — users only ever see their own data; permissions checked server-side, never trusted to the client.
  • Input validation & rate limiting — every input treated as hostile until proven otherwise.
  • Secure delivery — HTTPS everywhere, hardened response headers, secrets kept out of code.

Fast by default

Performance is a feature users feel on every visit — and one I budget for, not bolt on:

  • Lean page weight — no bloated frameworks or libraries where clean, hand-written code does the job.
  • Optimized production apps — performance and UX upgrades are my day-to-day work on a live e-commerce platform.
  • Clean, semantic code — accessible markup and maintainable structure, so the next developer (or auditor) can read it.
  • This site practices it — a single self-contained page, no trackers, shipped with hardened security headers.

I also test security from the attacker's side. Alongside building, I actively practice security testing and bug bounty hunting — with a focus on access-control flaws, the exact class of bug that secure-by-design development prevents. It changes how I write every endpoint: I build the thing, then I try to break the thing.

HackerOneYesWeHackIntigritiAccess-control testingAPI security
Technology

The full stack —
every layer, covered.

Everything I build with in production, grouped the way hiring managers scan. If it's listed here, I've shipped with it — no padding, no skill bars, no percentages.

Frontend

TypeScriptJavaScript (ES6+)React.jsNext.js (App Router)Redux ToolkitZustandTanStack QueryContext APITailwind CSSMaterial UIBootstrapViteHTML5CSS3

Backend

Node.jsExpress.jsNestJSREST API Design & IntegrationJWTOAuthFirebase AuthStripe PaymentsPayFast PaymentsPython — AI-assisted delivery

Databases & Data

PostgreSQLMongoDBPrismaMongooseSupabaseRedisQdrant (Vector Search)

AI & Automation

OpenAI APIClaude APIGemini APILangChainPrompt EngineeringEmbeddings & Semantic SearchAI ChatbotsWorkflow Automation & Bots

Products & Extensions

SaaS PlatformsChrome Extensions (Manifest V3)E-commerce & MarketplacesLearning Platforms (LMS)Admin DashboardsBrowser Automation

Tools & Platforms

Git & GitHubCI/CD PipelinesJest (Unit & E2E)VercelNetlifyHerokuAWS S3 (Basics)JiraPostmanAgile / Scrum
Where I'm heading

The stack above is what I ship today. My active focus now — explored hands-on in current product work, not claimed as proven expertise — is where hiring is moving next: AI agents & RAG systems, deeper vector search, modern LLM tooling, and edge & serverless deployment. The core stack keeps moving forward, deliberately.

AI AgentsRAG SystemsVector SearchLLM ToolingEdge & Serverless Deployment
Experience

Nearly five years,
always shipping.

Nov 2024 — Present

Senior Software Engineer (Full Stack)

Sundial Tech — Lahore (Hybrid)

  • Upgrade, optimize and maintain SundialHome.com, a production e-commerce marketplace for home décor & furniture built with Next.js.
  • Deliver performance and UX improvements across the stack with secure authentication and scalable architecture.
  • Ship production-ready features with cross-functional teams in an Agile environment.
Sep 2024 — Present

Founder / CEO & Lead Engineer

Zynex Solutions — Technology Institute & Software Services

  • Founded and run Zynex Solutions; own product direction and engineering across in-house products and client software services.
  • Lead development of the Zynex platform — public site, LMS, REST API and admin panel, with payments, installments and an AI chatbot.
  • Ship standalone products under Zynex, including the AI Instagram Engagement Scheduler extension.
Jan 2025 — Present

MERN Stack Developer & Trainer

Zynex Solutions

  • Deliver MERN training from core concepts to advanced topics, mentoring students through hands-on, project-based learning.
  • Develop and update course materials aligned with industry best practices.
Jan 2024 — Dec 2024

MERN Stack Developer

SoftTechPanel

  • Developed full-stack web applications on the MERN stack, optimizing API integrations for smooth backend communication.
  • Built dynamic, responsive React interfaces focused on usability.
Dec 2022 — Jan 2024

MERN Stack Developer

EVS Training IT Institute

  • Delivered full-stack training and mentorship while engineering production web solutions with the MERN stack.
  • Integrated third-party APIs and designed responsive layouts for optimal user experience.
How I Work

A simple, honest process.

No surprises, no disappearing. Four steps, in the open.

01

Discover

We define the problem, the users and what success looks like — before a single line of code. Honest scope, honest trade-offs.

02

Build

Iterative development in the core stack, with AI-assisted delivery where it speeds things up safely. You see progress, not promises.

03

Launch

Production deployment with authentication, payments and security checks in place — tested like real users (and attackers) will use it.

04

Support

Monitoring, fixes and improvements after launch. Software is maintained, not abandoned — that's my day job, every day.

About

Engineer by day.
Founder by night. Builder always.

I'm a Senior Software Engineer at Sundial Tech in Lahore, where I work on a production e-commerce marketplace — and the founder of Zynex Solutions, where I build products and software services of my own.

For nearly five years I've shipped web products end-to-end: the public site, the API, the admin panel, the payments, the launch. My core production stack is Next.js, React, TypeScript, Node.js and PostgreSQL — but I'm stack-flexible by design, delivering across frameworks through AI-assisted development paired with targeted research.

Alongside product work I train MERN developers at my own institute and practice security testing as a bug bounty hunter — two habits that keep my engineering honest: if I can't teach it or break it, I don't fully understand it.

Contact

Let's build something
worth shipping.

Hiring for a remote role, or have a product to build? The fastest way to reach me is email — I read everything myself.

umaisusman03@gmail.com Download Résumé

Prefer email? umaisusman03@gmail.com