Fiaz A.

Multi Tenant SaaS & Stripe Expert | Next.js, Supabase, Vercel, Node Js

𝐁𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐚 𝐌𝐮𝐥𝐭𝐢 𝐓𝐞𝐧𝐚𝐧𝐭 𝐒𝐚𝐚𝐒, 𝐄𝐑𝐏, 𝐇𝐞𝐚𝐥𝐭𝐡𝐜𝐚𝐫𝐞, 𝐏𝐚𝐲𝐦𝐞𝐧𝐭, 𝐁𝐨𝐨𝐤𝐢𝐧𝐠, 𝐨𝐫 𝐀𝐈 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦? I specialize in taking over existing SaaS products, understanding complex codebases quickly, and evolving them into scalable, production-ready platforms with modern features and AI integrations. Over 6+ years, I’ve taken over 10 live SaaS products that needed serious work to scale and made them production-ready: Database: Restructured PostgreSQL or Supabase schemas, indexes & queries and Applied RLS for security Performance: Optimized APIs, caching & high-load workflows Architecture: Refactored tightly coupled codebases for scale and maintainability Payments: Stabilized subscriptions, webhooks, retries & billing flows Security & GDPR: Built secure auth, data handling & deletion workflows UI/UX: Improved complex product flows & dashboards AI & Automation: Added practical AI-powered wor 𝐌𝐲 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐒𝐭𝐚𝐜𝐤 Frontend: Next.js, React, TypeScript Backend: .NET, ASP.NET Core, C#, Node.js Database: PostgreSQL, Supabase, Redis Cloud: AWS, Azure, Vercel Payments: Stripe & payment APIs AI: OpenAI, RAG, AI agents, document processing Architecture: Clean Architecture, DDD, SOLID, REST APIs, event-driven systems Others: Bunny CDN, Zoho CRM, GHL, Odoo, QuickBooks, But technology alone isn't what makes a system successful. I focus on architecture, data flow, security, scalability, performance, integrations, maintainability, and production readiness so the product can continue evolving as the business grows. 𝐖𝐡𝐚𝐭 𝐈 𝐁𝐮𝐢𝐥𝐝 𝐒𝐚𝐚𝐒 & 𝐌𝐮𝐥𝐭𝐢-𝐓𝐞𝐧𝐚𝐧𝐭 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 B2B SaaS, subscription platforms, marketplaces, admin portals, analytics systems, workflow applications, multi-tenant architecture, role-based permissions, billing, reporting, integrations, and scalable APIs. 𝐂𝐨𝐦𝐩𝐥𝐞𝐱 𝐄𝐑𝐏 & 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 I build systems where customers, products, inventory, orders, purchasing, invoicing, payments, approvals, users, permissions, notifications, reporting, and accounting workflows need to work together. 𝐇𝐞𝐚𝐥𝐭𝐡𝐜𝐚𝐫𝐞 & 𝐏𝐡𝐚𝐫𝐦𝐚𝐜𝐲 𝐒𝐨𝐟𝐭𝐰𝐚𝐫𝐞 Healthcare workflows, prescription processing, pharmacy management, document processing, OCR, structured patient information, business rules, integrations, reporting, and role-based applications. 𝐓𝐫𝐚𝐯𝐞𝐥, 𝐇𝐨𝐭𝐞𝐥 & 𝐓𝐨𝐮𝐫 𝐁𝐨𝐨𝐤𝐢𝐧𝐠 Booking and reservation platforms involving availability, inventory, pricing, customers, operators, cancellations, payments, notifications, and administrative workflows. 𝐏𝐚𝐲𝐦𝐞𝐧𝐭𝐬 & 𝐒𝐭𝐫𝐢𝐩𝐞 Stripe Subscriptions, Stripe Billing, Stripe Connect, PaymentIntents, Checkout, Payment Elements, ACH, marketplace payments, recurring billing, usage-based billing, invoicing, automated payouts, webhooks, subscription lifecycle management, payment failures, retries, refunds, and revenue workflows. The important part isn't simply integrating Stripe. It's making sure payments correctly drive your application's business logic—from signup and billing to renewals, failed payments, refunds, access control, payouts, invoices, and reconciliation. 𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 I've worked with OpenAI, AI agents, RAG systems, document processing, intelligent assistants, and workflow automation. I focus on using AI where it creates measurable business value, not simply adding an AI chatbot. That means thinking about data, context, retrieval, business rules, reliability, cost, security, and what should remain deterministic. 𝐑𝐞𝐚𝐥-𝐖𝐨𝐫𝐥𝐝 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 • Built a multi-tenant advertising and digital signage SaaS platform supporting campaign management, targeting, scheduling, analytics, reporting, and high-volume data processing. • Spent 3+ years helping build a large-scale UK logistics platform covering route optimization, order management, driver applications, proof of delivery, real-time tracking, notifications, invoicing, support workflows, and reporting. • Designed and implemented Stripe-powered subscription and marketplace systems with recurring billing, usage-based pricing, ACH, Connect onboarding, payouts, invoicing, and webhook automation. • Built AI-powered applications using OpenAI, agents, RAG, document processing, intelligent assistants, and business automation. 𝐇𝐨𝐰 𝐈 𝐖𝐨𝐫𝐤 I personally handle the work from requirements → architecture → development → integrations → testing → deployment → optimization. Before building, I want to understand: • How customers use the product • How money flows through the system • Which workflows should be automated • What happens when something fails • How the application will behave as data and users grow My business-first approach helps turn MVPs into scalable products by getting the architecture and workflows right from the start. Building something complex? Let me know what you're building, what's working, and where you're stuck.