I Build
That Drive Business Growth
Senior Backend & Full-Stack Engineer specializing in NestJS, Node.js, Next.js & TypeScript. I build fintech-grade systems — multi-currency wallets, escrow, and money-safe payment architectures (double-entry ledgers, idempotent webhooks) — plus real-time platforms and 12+ production apps. I've migrated 2 billion+ records with zero data loss. Let's build your next big thing.
0+
Years Experience
0+
Production Apps
0B+
Records Handled
0+
Countries Served
UpworkTrusted Technologies
About Me
Building Scalable Digital Solutions
I'm Ahmad Hameed — a Senior Backend & Full-Stack Engineer who helps startups and enterprises ship production-ready fintech and web applications. With 3+ years across fintech (escrow, payments, ledgers), healthcare, blockchain, and enterprise SaaS, I bring the technical depth to handle your most demanding requirements.
My track record speaks for itself: I've migrated 30GB+ databases with 2 billion+ records using distributed BullMQ workers with zero data loss. I've built real-time platforms with Redis Pub/Sub, WebSockets, and Socket.IO that serve thousands of concurrent users. I've reduced release cycles by 40% through Docker-based CI/CD pipelines.
Whether you need a full-stack SaaS platform, REST/GraphQL API backend, real-time system, or blockchain integration — I deliver on time, within budget, with production-grade quality.
Large-Scale Migration
Architected 30GB dump, 2B+ posts migration from MariaDB to PostgreSQL using distributed BullMQ workers
Moderation System
Built advanced user moderation with IP blocking, shadow bans, and granular space/thread-specific restrictions
40% Faster Releases
Reduced release time by 40% through Docker-based CI/CD pipelines using GitHub Actions
Team Leadership
Mentored 4+ junior developers, improving team productivity and code quality across multiple projects
Why Choose Me
Why Clients Choose Me
I don't just write code — I deliver results that grow your business. Here's why 100% of my clients would hire me again.
Production-Ready Code
I don't build prototypes — I build production systems. Proper error handling, security best practices, and optimized performance from day one.
Battle-Tested at Scale
I've migrated 2 billion+ records, built real-time platforms with Redis Pub/Sub & Socket.IO, and designed architectures that handle enterprise-level traffic.
On-Time, Every Time
100% on-time delivery track record. I use agile sprints with weekly demos, so you see progress constantly and never have surprises.
One Developer, Full Stack
Frontend, backend, database, DevOps, deployment — I handle the entire stack. No need to hire and coordinate multiple developers.
Communication You'll Love
Daily updates, clear documentation, and technical decisions explained in plain English. International clients across the US, Netherlands, and Pakistan keep coming back.
Trusted by Teams
I've mentored 4+ junior developers, led cross-functional teams, and collaborated with international clients from Netherlands to Pakistan.
Currently available for new projects
Free consultation & estimate within 24 hours — no commitment required.
Career
Professional Experience
Senior Software Engineer
Building scalable real-time applications with event-driven architecture using Redis Pub/Sub and BullMQ.
Key Achievements
- ▸Implementing background job processing and task scheduling with BullMQ workers
- ▸Designing push notification systems using Firebase Cloud Messaging (FCM) for web and mobile
- ▸Managing database migrations and query optimization using Knex
- ▸Developing real-time features with WebSockets and Socket.io for live data synchronization
Technologies
Senior Software Engineer
Led full-stack development of blockchain-based analytics tools for Solana, integrating token analytics and whale alert systems.
Key Achievements
- ▸Integrated APIs (Solscan, Twitter, Deep Seek, CoinGecko, LunarCrush) for real-time crypto insights
- ▸Designed and deployed Docker-based CI/CD pipelines using GitHub Actions, reducing release time by 40%
- ▸Trained and mentored 4+ junior developers, improving team productivity and code quality
- ▸Delivered scalable backend services with NestJS & PostgreSQL with secure role-based access control
Technologies
Software Engineer
Built and deployed modern full-stack applications with secure authentication, validation, and role-based APIs.
Key Achievements
- ▸Implemented real-time chat & video conferencing using WebSockets and WebRTC, boosting engagement by 30%
- ▸Used Docker & GitHub for CI/CD deployment pipelines on Vercel and AWS
- ▸Automated workflows with Puppeteer for data scraping, saving 20+ hours/month in manual work
- ▸Collaborated with cross-functional teams to deliver interactive dashboards and management systems
Technologies
Freelance Full Stack Developer
Delivered custom web solutions for international clients with focus on backend development and system architecture.
Key Achievements
- ▸Developed responsive web applications using modern technologies
- ▸Built robust backend systems with database optimization
- ▸Implemented secure authentication systems and API integrations
- ▸Delivered projects for international clients across the US and Netherlands
Technologies
Services
What I Offer
Comprehensive development services from backend architecture to frontend implementation, specializing in scalable, secure, and high-performance solutions.
Backend & Architecture
API Development
RESTful APIs, GraphQL, NestJS microservices
Database & Migrations
PostgreSQL, MongoDB, MySQL, Knex, TypeORM, Prisma
Event-Driven Systems
Redis Pub/Sub, BullMQ workers, SSE
Cloud & DevOps
Docker, AWS, CI/CD, GitHub Actions, Nginx
Frontend & Real-Time
Modern Web Applications
React.js, Next.js, TypeScript, Redux, Zustand
Real-Time Features
WebSockets, Socket.io, WebRTC, live chat & video
Push Notifications
Firebase Cloud Messaging (FCM) for web & mobile
UI/UX Implementation
Tailwind, MUI, Ant Design, Shadcn UI, Three.js
Specialized Solutions
Blockchain & Web3
Solana, token analytics, wallet integration, Web3.js
Healthcare Systems
Hospital management, OPD/IPD, reporting dashboards
Payment & Escrow
Stripe, Stripe Connect, marketplace escrow flows, subscriptions, split payments
Messaging & Notifications
WhatsApp Business API, Twilio SMS, email automation, real-time alerts
Data Migration
Large-scale migrations, distributed workers, zero data loss
Ready to Build Something Amazing?
Let's discuss your project requirements and create a solution that exceeds your expectations.
My Process
How I Work
A transparent, collaborative process that keeps you informed and in control at every stage.
Discovery & Planning
I start by understanding your business goals, target audience, and technical requirements. We define the scope, timeline, and milestones together.
Architecture & Design
I design the system architecture, database schema, and API structure. You'll see wireframes and get approval before any code is written.
Development
Agile development with regular demos and updates. I build iteratively so you can see progress and provide feedback at every sprint.
Testing & QA
Thorough testing including unit tests, integration tests, and end-to-end testing. I ensure your application works flawlessly before launch.
Deployment & Launch
Smooth deployment with CI/CD pipelines, monitoring setup, and performance optimization. Your app goes live with confidence.
Support & Maintenance
Post-launch support, bug fixes, and feature updates. I'm here for the long term to ensure your application keeps running perfectly.
Portfolio
Featured Projects
Not demos or tutorials — these are real production applications serving real users. From a multi-currency escrow payment platform and real-time collaboration tools to systems handling 2 billion+ records.
TrustBrig — Escrow Marketplace
Production multi-currency escrow marketplace (USA). Engineered the escrow engine (milestones, hold/release/refund, auto-release) and a money-safe payments layer — double-entry ledger, transactional outbox, idempotent webhooks and reconciliation against a Banking-as-a-Service rail (Buckzy). Plus KYC, disputes, and step-up auth.
knitWork — Real-Time Collaboration
Cross-platform collaborative desktop application. Built an Electron client with custom-protocol auth and auto-updates, a real-time collaborative-editing backend (Hocuspocus / Yjs over WebSockets), and a NestJS auth microservice (Prisma, Argon2, Google OAuth, JWT, Redis).
Petiggo — Multi-Vendor Marketplace
Multi-vendor e-commerce marketplace with a customer storefront, vendor portal, and admin panel on a shared NestJS + PostgreSQL backend. Real-time features via Socket.io (Redis adapter), BullMQ background jobs, Google OAuth, a Cloudinary image pipeline, and FCM push notifications.
PakPassion
One of cricket's biggest community platforms — 62K+ members, 162K+ threads. Led 30GB data migration of 2B+ posts from legacy XenForo to PostgreSQL with zero data loss. Real-time chat with DMs, read receipts, Redis Pub/Sub notifications, FCM push.
Chordenet
Voicemail extension platform with Stripe subscription billing, Kit API integration for automated user tagging, master-sub account architecture, and multi-user analytics dashboard.
COTD - Solana Token Analytics
Blockchain-based analytics tool for Solana with algorithm to rank top 30 profitable tokens, AI-based whale transaction alert system, and Three.js/TradingView interactive charts.
PAK HIMS - Healthcare System
Enterprise hospital management system with OPD, IPD, Pathology, Appointments, Blood Bank modules. Automated PDF reporting, role-based auth, and real-time dashboards with microservice architecture.
Ortho — Lab Management System
Orthodontic lab management platform (admin, backend, and frontend) for patient/case records and lab workflow. Real-time updates via Socket.io, scheduled jobs with node-cron, an image pipeline (Sharp + Alibaba OSS), FCM notifications, and a responsive role-based admin panel.
Promotez Dashboard
Full-featured admin dashboard for game submission management with Chart.js analytics, multi-step workflow engine, and user/reviewer management for a Netherlands-based client.
AI Portfolio Assistant
Custom AI chatbot powering this portfolio — Llama 3.3 70B via Groq API with real-time streaming (SSE), multi-turn conversation memory, smart keyword fallback if API goes down, rate limiting, and auto-clickable links. Try it in the bottom-right corner!
Pani Plus — Business Management PWA
Complete business management PWA for a water delivery company — digitized paper-based operations. Client CRM with 3 plan types, monthly auto-invoicing, partial payment tracking, delivery boy route management, walk-in POS, PDF invoices with WhatsApp sharing in Urdu.
Kitchen Konnect — Code Review & Audit
Full-stack code review and performance audit of a food marketplace platform (4 codebases). Found 50+ security vulnerabilities, identified critical performance bottlenecks, and delivered 12-category scoring with phased fix roadmaps.
Tubewell Pro — Water Management System
Professional water distribution management platform — customer usage tracking by phone number, payment & dues management, analytics dashboards, automated PDF invoicing, Excel data export. Customer portal + admin dashboard.
OxygenBi - Blogging Platform
Dynamic blogging platform with seamless writing and publishing, Three.js visuals, Editor.js rich content, and a powerful admin dashboard for content creators.
InternO - AI Internship Platform
AI-powered internship recommendation system with WebRTC video interviews, live chat, and complete hiring platform. Won 1st position at Industrial Fair Expo.
Want to see how I solve problems?
Deep dives into migrating 2 billion records, building Stripe billing systems from scratch, and auditing enterprise codebases for security vulnerabilities.
Proof of Work
Client Results
Real metrics from real production projects — not promises, proof. Every number here is from a shipped, live application.
2B+
Records Handled
8
Live Production Apps
3
Countries Served
10+
Apps Delivered
2B+
Records Migrated
PakPassion
LiveCricket Community Platform
Migrated 30GB database from legacy XenForo to PostgreSQL — 40+ resumable scripts, BullMQ workers, zero data loss. Built real-time chat with DMs, read receipts, and Redis Pub/Sub notifications.
4-Tier
Stripe Billing System
Chordenet
LiveUS Client — Luminos LLC, Denver CO
Built complete SaaS billing: monthly + annual cycles, team seat management, lifetime discount codes, free trial flow, webhook-driven proration. Chrome Extension + Outlook Add-in.
5 APIs
Integrated
COTD
LiveBlockchain Analytics Platform
Solana token analytics with custom ranking algorithm for top 30 profitable tokens, AI-powered whale alerts, Three.js 3D visuals + TradingView charts.
6
Healthcare Modules
PAK HIMS
LiveEnterprise Hospital System
OPD, IPD, Pathology, Appointments, Blood Bank, Admin — microservice architecture. Automated PDF reports replaced hours of daily paperwork. Role-based access for doctors, nurses, lab techs.
40%
Faster Releases
Cure Logics
CI/CD & DevOps
Docker-based CI/CD pipelines using GitHub Actions. Mentored 4+ junior developers. Integrated Solscan, CoinGecko, LunarCrush, Twitter, and DeepSeek APIs.
20
API Endpoints
Pani Plus
Water Delivery Business PWA
Complete business management PWA — digitized paper operations. Client CRM, monthly auto-invoicing, partial payments, delivery tracking, walk-in POS, PDF invoices with WhatsApp share in Urdu. 10 database models, 15 pages.
50+
Security Vulns Found
Kitchen Konnect
LiveCode Review & Performance Audit
Full-stack audit of a food marketplace (4 codebases). Found hardcoded credentials, XSS, unverified Stripe webhooks, performance bottlenecks. Delivered 12-category scoring and phased fix roadmaps.
1000+
Active Customers
Tubewell Pro
LiveWater Distribution Management
Professional water distribution platform — customer usage tracking by phone number, payment management, analytics dashboards, PDF invoicing, Excel export. Customer portal + admin dashboard.
30%
Engagement Boost
Mercury Sols
Enterprise Development
WebRTC video conferencing and live chat boosted platform engagement by 30%. Puppeteer automation saved 20+ hours monthly in manual workflows.
Tech Stack
Technical Skills
Contact
Let's Work Together
Ready to turn your idea into a production-ready application? Share your project details and get a free consultation & estimate within 24 hours. No commitment required.