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Freelance Software &
AI Systems Developer

Hire Khubaib Shah | Freelance Full Stack Software Engineer, Custom Software Developer, AI App Problem Solver

Khubaib
Shah

Khubaib Shah - Freelance Full Stack Web Developer

Khubaib
Shah

86 /Satisfied Clients
24 /Projects Finished
2 /Years of Experience
>95% /Client Retention Rate
Available for Freelance & Consulting

Building custom software, solving complex engineering bottlenecks, and turning AI prototypes into scalable products.

Need a custom app or website built from scratch? Want a big business system for sales, billing, or accounts that just works? Or is your AI-powered app broken or too slow when lots of people use it? I can help. I fix hard tech problems with simple, tidy code, and I do it fast.

Projects

Apply Os (AI Engine)

AI-powered job application system generating ATS-tailored resumes and cover letters using Google Gemini and Stripe monetization.

KS Ordering Management

Multi-tenant white-label restaurant platform for managing online ordering, POS, multi-branch operations, and kitchen workflows.

GymFlow SaaS

B2B Multi-Tenant SaaS Platform with automated attendance, member management, and Stripe subscription billing.

Munshi Wholesale CRM

B2B wholesale inventory and distribution hub featuring multi-shelf warehouse stocking, real-time SKU tracking, dealer credit limits, and customer ledger balancing.

TripTrails Travel ERP

Enterprise Travel ERP, CRM & Accounting Platform with automated double-entry general ledger, 42 relational models, client-side PDF document engine, and multi-branch operations.

Studio Book CRM

Wedding & cinema operations platform with multi-event booking pipelines, 50/40/10 milestone billing, crew scheduling, and 12-month financial analytics.

ElectroBiz POS & ERP

Commercial Point of Sale (POS) and installment management ERP for retail showrooms with CNIC verification, automated payment schedules, overdue aging reports, and bilingual Urdu/English receipt printing.

Feeva School Management

Comprehensive School Management System with student lifecycle tracking, attendance automation, fee analytics, and multilingual support.

Living Lines

E-commerce platform for curated interior design products and interior designer showcases.

SoleBazaar

Footwear e-commerce platform for customers and admins with product inventory, cart workflows, and order lifecycle management.

Cortado

Modern artisanal coffee ordering platform with real-time order tracking, payment processing, and menu customization.

FindIt

Community lost-and-found portal enabling local users to report, search, and verify misplaced personal items.

Pizza Xpert

Online pizza ordering platform with custom toppings, live order tracker, and admin kitchen dispatch dashboard.

Azzipizza.it

Commercial Italian pizza ordering system with live Socket.IO data synchronization and PayPal payment integration.

The Artisan Wagon

Modern dining e-commerce application allowing customers to reserve tables and place food orders online.

Raj's By AZ

Curated luxury gifting and e-commerce brand platform featuring multi-tier beauty, jewellery, and cosmetic gift box bundles (14, 20 & 25 items) with dynamic pricing and smooth checkout.

Experience
Frontend Engineer Fossphorus LLC
Dec 2025 – Present
Software Developer BNGlab
Feb 2025 – Dec 2025
Full Stack Developer Freelance
Dec 2024 – Present
Gyms
Tenants
Restaurants
E-commerce
Landing page
SaaS Platform
Social network
ERP Platform
Blog
Corporate website
CRM Platform
Dashboard
Technical Expertise

Technical
Skills

Years of
Experience

2.2+

AI & Problem Solving

  • OpenAI & Google Gemini APIs
  • AI App Debugging & Rescue
  • Prompt & Context Engineering
  • Complex Codebase Troubleshooting

Frontend

  • React 19 & Next.js 16
  • TypeScript Architecture
  • Tailwind CSS & ShadCN UI
  • Zustand & TanStack Query

Backend & ERP

  • Node.js & Express.js
  • Double-Entry Ledger Accounting
  • REST APIs & Socket.IO
  • Stripe & PayPal Webhooks

Database & Cloud

  • PostgreSQL & MongoDB
  • Prisma ORM & Migrations
  • Supabase & Edge Functions
  • Vercel, AWS & Docker
Testimonials

"Khubaib's expertise in full-stack development is truly remarkable. He delivered a high-quality product that exceeded our expectations. His attention to detail and modern design approaches transformed our digital presence. Highly recommended!"

Sarah Jenkins

CEO, TechFlow Solutions

"Khubaib built an amazing gym management system for us. It made tracking member attendance and fees incredibly easy. The dashboard is very intuitive and his work is highly professional. Best developer in Pakistan!"

Hamza Tariq

Owner, FitLife Arena

"We are using the GymFlow SaaS product with the monthly subscription model that Khubaib developed. It has completely automated our billing and multi-tenant management. The Stripe integration is flawless."

Ali Raza

Founder, FlexFit SaaS

"Khubaib developed a complete real-time pizza ordering flow for us, including a beautiful customer website and a robust admin dashboard. The PayPal integration and live data sync work perfectly."

Usman Sheikh

Manager, Azzi Pizza
FAQ

Frequently Asked Questions

You can hire me directly by filling out the contact form below, emailing me at syedkhubaibshah@icloud.com, messaging via WhatsApp at +92 314 9784156, or reaching out on LinkedIn. I work with founders, businesses, and agency teams worldwide on a fixed-price project basis, monthly retainer, or hourly consulting.

Yes! If you built an AI prototype, wrapper, or app that is stuck, experiencing latency, failing prompts, breaking API limits, or needs complete full-stack integration (database, user authentication, billing, responsive UI), I can audit your code, debug issues, integrate OpenAI or Google Gemini APIs, and turn your prototype into a scalable production app.

Yes. I am frequently brought in as a software problem solver to unblock engineering teams. Whether you are dealing with broken database migrations, slow SQL queries, Next.js hydration issues, real-time sync bugs with WebSockets, or third-party payment gateway webhooks (Stripe/PayPal), I diagnose and resolve root causes quickly.

I build complete web applications from concept to deployment: multi-tenant B2B SaaS platforms, enterprise ERPs with double-entry accounting general ledgers, retail POS with installment tracking, real-time ordering systems, and AI-driven automation workflows using Next.js 16, TypeScript, Node.js, and PostgreSQL.

You work directly with the senior engineer who writes and tests every line of code. No middlemen, no junior developers, no communication delays. With deep domain mastery in financial accounting logic, AI integration, and production UI design, you get enterprise-grade software built correctly the first time.

Engagements are flexible: Milestone-based fixed pricing for defined project scopes, hourly consulting for troubleshooting and code reviews, or dedicated weekly/monthly contracts for ongoing development. I provide an initial architectural assessment and scope estimate within 24 hours of contact.

Have a Project or
Software Problem to Solve?

Hire Khubaib

Available for freelance software development, building custom SaaS/ERPs,
and debugging or completing AI-driven applications worldwide.

Reach out anytime

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