PayGreenCard — Digital Payments
Secure digital wallet & payments platform with instant transfers, 2048-bit encryption, fraud detection and high-volume transaction processing.

I build scalable SaaS platforms, AI-powered applications, payment systems, and enterprise-grade web solutions used by businesses worldwide.

I'm Jehanzeb Ali — a Senior Full Stack Developer and AI Solutions Architect with over 13 years of hands-on experience designing, building, and scaling production systems. From SaaS platforms handling millions of transactions to AI agents automating entire business workflows, I help founders and enterprises turn complex problems into elegant, reliable software.
I build AI systems that ship — agents, RAG pipelines, vector search, and automation workflows that integrate cleanly into your stack.
A snapshot of the 150+ SaaS, AI, FinTech and enterprise platforms I've architected and shipped for clients worldwide.
Secure digital wallet & payments platform with instant transfers, 2048-bit encryption, fraud detection and high-volume transaction processing.
Immersive phonics-based language learning built with Unity + Laravel, AI-driven recommendations, secure subscriptions and cross-platform sync.
Secure, scalable team-management SaaS with real-time communication, task management, role-based access and analytics for distributed teams.
Manages millions of knowledge units with AI-powered curation, 360° reporting, premium subscriptions and cross-domain session sync.
Modern learning & leadership platform with AI content curation, real-time progress tracking and secure course payments.
High-performance SMS tracking, gateway integrations and campaign analytics handling billions of messages across multiple databases.
Manages millions of consultants & earnings, Elastic search, audio/video calls via WebRTC + Twilio and multi-language support.
Leading business buying & selling marketplace with thousands of listings, advanced filtering, payments and engagement analytics.
Commercial real-estate marketplace with real-time listings, advanced filters, lease workflows and premium listing payments.
Online booking system integrating 18+ live rate APIs (Booking.com, Tripadvisor, Tourico) with Elasticsearch and multi-language support.
Asterisk + VoIP telecom platform handling trillions of CDRs, call routing, billing and real-time monitoring at scale.
Connects homeowners with service providers — escrow payments, microservices backend for iOS & Android apps.
Designing AI agents, RAG systems and automation pipelines for global SaaS and enterprise clients.
Led teams building multi-tenant SaaS, payments and analytics platforms scaling to millions of users.
Shipped Laravel, Node.js, Vue and React applications, marketplaces and integrations across industries.
Built PHP / CodeIgniter / Laravel applications, payment integrations and REST APIs for international clients.
Started journey in PHP & MySQL — learned the craft of production engineering and clean architecture.
Custom web applications and SaaS products built end-to-end with modern stacks.
Add OpenAI, Claude, Gemini, RAG and AI agents into your existing systems.
Multi-tenant scalable SaaS platforms with billing, roles and analytics.
Stripe, PayPal and custom payment workflows — subscriptions, escrow, payouts.
Architecture reviews, scalability planning and engineering due diligence.
Hiring, mentoring and leading remote engineering teams to ship faster.
"Jehanzeb delivered a complex SaaS rewrite ahead of schedule. His architectural decisions saved us months down the line."
"Best AI engineer we've worked with. Our support automation went live in 6 weeks and cut tickets by 70%."
"Top-rated for a reason. Communication, code quality, and ownership are all elite. We re-hire on every project."
"Implemented Stripe + custom payouts across 14 countries flawlessly. No drama, just results."
Patterns I use to take AI agents from prototype to enterprise reliability.
Multi-tenancy, queues, billing, observability — the parts no tutorial teaches.
A pragmatic framework for scalable systems that don't slow you down today.
Webhooks, idempotency, reconciliation — lessons from millions of transactions.
Tell me about your project — SaaS, AI, payments or enterprise. I usually respond within 24 hours.