Hi! I'm Muhammad Osama Qaseem - Full Stack Developer
Full Stack Web Development Services
MERN Stack & SaaS Product Development Expert
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I am a professional Full Stack Software Developer with hands-on experience in building modern, secure, and scalable web and mobile applications.
I help startups, businesses, and entrepreneurs turn ideas into fully functional digital products. With expertise in MERN stack, React.js, Node.js, Flutter, and blockchain development, I deliver high-performance solutions tailored to business needs. Whether you need a custom web application, SaaS platform, or mobile app, I provide end-to-end development services.
What I Build
I create custom software solutions that help businesses and startups grow. From web applications to mobile apps, AI-powered tools to blockchain platforms—I work with modern technologies to build products that solve real problems. Contact me to discuss your project or read my blog for development insights.
AI Receptionist & Voice Agents
Custom AI receptionists and phone agents that answer calls, qualify leads, book appointments, and sync every conversation to your CRM—built with Vapi, Retell, Twilio, and your existing tools.
Workflow Automation & CRM Integration
n8n, Make, and Zapier automations plus HubSpot, GoHighLevel, and Salesforce wiring—lead capture, follow-ups, call logging, and pipelines without manual busywork.
AI-Powered Applications
Building intelligent web applications that leverage generative AI and machine learning. I integrate AI capabilities into workflows to automate processes and create smarter business solutions.
Custom Software Development
Tailor-made software solutions to automate and optimize business processes. Building enterprise-grade applications with ASP.NET Core 8, following SOLID principles and Domain-Driven Design.
Full Stack Web Development
Building complete web applications from frontend to backend. I create custom, scalable, and secure solutions using modern frameworks that grow with your business needs.
MERN Stack Development
Creating high-performance web applications using MongoDB, Express, React, and Node.js. Perfect for building scalable SaaS products and modern web platforms with a robust tech stack.
Mobile App Development
Cross-platform mobile applications using Flutter. Building mobile apps with Firebase integration, offline functionality, real-time synchronization, and native performance for both iOS and Android.
Blockchain Development
Decentralized applications, smart contracts, and Web3 integrations. Building DApps, token exchange platforms, and blockchain integrations using Web3.js, Ethers.js, Solana Web3.js, MetaMask, WalletConnect, and Jupiter DEX.
API & Database Architecture
Designing robust APIs with ASP.NET Core, GraphQL, REST, and WebSockets. Optimizing SQL Server databases with stored procedures, triggers, indexing, and Entity Framework Core for efficient data operations.
E-commerce & Business Solutions
Developing Point of Sale (POS) systems, e-commerce platforms with payment processing, loyalty management systems, transportation platforms, and business management solutions with real-time features.
SaaS Product Development
Building SaaS products from MVP to full-scale platforms. I design multi-tenant architectures, implement subscription management, and create scalable backend infrastructure that supports growth.
Backend Development
Designing robust backend systems with scalable architecture. I build RESTful APIs, GraphQL endpoints, microservices, and optimize databases to support high-performance applications.
Core Expertise
AI & automation, marketing optimization, medical billing, service business systems, CRM integrations, and full stack SaaS—each point links to a dedicated page.
AI & Automation
Voice AI receptionists, agents, and workflows that answer, book, and sync CRM.
- ▸AI receptionists & phone agents (Vapi, Retell)
- ▸Custom AI agents & RAG knowledge systems
- ▸n8n / Make / Zapier workflow automation
- ▸OpenAI, Claude & LangChain product features
- ▸Post-call CRM logging & lead qualification
Marketing & Optimization
SEO, CRO, ads-to-CRM attribution, and lifecycle automation that grows pipeline.
- ▸Conversion rate optimization (landing & booking flows)
- ▸SEO automation & technical growth systems
- ▸Google Ads & Meta lead sync to CRM
- ▸GA4 funnels, events & growth analytics
- ▸Email nurture & lifecycle automation
- ▸A/B testing for CTAs, offers & pricing pages
Medical Billing & Healthcare
Revenue cycle software, claims workflows, and AI scheduling for clinics.
- ▸Medical billing & claims systems
- ▸Revenue cycle management (RCM)
- ▸EDI 837/835 claims integrations
- ▸HIPAA-aware app patterns & access control
- ▸EHR / practice management integrations
- ▸Patient scheduling AI & reminder automation
Service Business Systems
Booking, dispatch, lead routing, and reputation tools for local service jobs.
- ▸Appointment booking & deposit flows
- ▸Field service / dispatch mobile apps
- ▸Lead routing from ads, chat & AI calls
- ▸Review & reputation automation
- ▸Call tracking & attribution
- ▸Quotes, invoices & job costing
CRM & Integrations
HubSpot, GoHighLevel, Salesforce—and the webhooks that keep pipelines clean.
- ▸HubSpot CRM & call engagement sync
- ▸GoHighLevel calendars, SMS & pipelines
- ▸Salesforce objects & automation
- ▸CRM automation & data hygiene
- ▸AI receptionist → GHL / HubSpot wiring
Full Stack & SaaS
Next.js products, NestJS/ASP.NET APIs, and multi-tenant SaaS architecture.
- ▸Next.js & React product engineering
- ▸NestJS / Node & ASP.NET Core APIs
- ▸Multi-tenant SaaS & billing foundations
- ▸PostgreSQL, Prisma & Redis data layers
- ▸Docker, Vercel, AWS & CI/CD delivery
Technology Arsenal
Trending stack for AI, automation, marketing, medical billing, and modern products—each tool links to its own page. Browse all technologies →
AI & Automation
Voice agents, LLM apps, and workflow automation that remove manual ops.
Frontend & Product UI
Modern React stacks for fast, accessible product interfaces.
Backend & APIs
Reliable APIs, auth, and multi-tenant backends for real products.
CRM, Marketing & Optimization
Growth stack: CRM wiring, ads, SEO/CRO, and marketing automation.
Healthcare & Medical Billing
Revenue cycle, claims, scheduling, and HIPAA-aware healthcare software.
Service Business Systems
Software for agencies, home services, clinics, and field teams.
Databases & Data
Storage, caching, and data pipelines that scale with the product.
DevOps & Cloud
Ship reliably with containers, CI/CD, and modern cloud hosts.
Web3 & Blockchain
Wallets, DEXs, and on-chain product features when you need them.
My Portfolio – Real Projects & Solutions
Below are selected projects that demonstrate my expertise in web application development, software engineering, and blockchain solutions. Each project focuses on performance, scalability, and user experience. Need similar solutions? View my services or contact me to discuss your project.
Velay
Multi-tenant sports venue booking SaaS for Pakistan — padel, futsal, cricket, gaming, and snooker. NestJS API, React admin dashboard, customer and vendor Expo apps, WhatsApp booking, and AI-assisted scheduling.
GT Estate
Full-stack real estate platform built with Next.js 14 and NestJS. Modern public site with Tailwind and Framer Motion — hero, quick search, featured properties, testimonials, and admin dashboard. Includes AI-powered property matching, VR tours, smart home integration, and TypeScript across website, API, and admin tooling.
Strikers Gear
Full-stack e-commerce for sports gear (shoes, jerseys, accessories). NestJS + MongoDB API, React (Material UI) admin dashboard for products, stock, and orders, and a Next.js storefront with dynamic hero banners, category and brand pages, and mobile-first layout. Category-wise size systems, per-size stock, cart & COD checkout, Facebook Pixel, and WhatsApp order sharing.
Driving measurable growth and engagement through thoughtful design and engineering.
Every product I build starts with understanding user goals and translating them into intuitive, high-performance experiences. From concept to launch, I focus on meaningful results—boosting user engagement, retention, and overall business impact.
Experience
Full Stack Developer
Voxity
Contributing to Web3 projects including admin dashboards, token exchange platforms, and blockchain-based game websites. Building scalable, secure interfaces with smart contract integration.
Full Stack Developer
Quest Enterprises Pakistan
Built and enhanced frontend of ERP modules using Vue.js and React.js. Designed scalable, reusable UI components for complex enterprise workflows.
Software Developer
Tech Qode Private Limited
Contributed to full-stack development of Retail Management System. Implemented modern architectural patterns for maintainability and scalability.
Ready to bring your project to life?
Let's work together to create something amazing. Get in touch and let's discuss your next project.
Latest Blog Posts
Read my thoughts on web development, technology, and career growth. Learn about 2026 career trends, SaaS development, AI in development, and more.
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