Debi P.

Full Stack Web Developer | SaaS - MVP - AI | Laravel, React, NodeJS

Senior Full-Stack Developer with 9+ years of experience building multi-tenant SaaS platforms, payment systems, secure APIs, and custom LLM integrations for production applications. I've worked on more than 40 web applications ranging from internal tools to enterprise platforms, including maintaining and evolving a single multi-tenant SaaS for nearly a decade. I build new applications from scratch and take over existing codebases that need stabilization. My work often involves architecting custom SaaS backends, dealing with race conditions in payment gateways, and wiring LLMs into both greenfield products and legacy systems without breaking them. I care about what happens after launch: keeping the codebase understandable, making changes without breaking existing workflows, and avoiding architecture that becomes a problem six months later. When needed, I also help clients make technical decisions around architecture, scalability, and deployment. ❯ TECHNICAL EXPERTISE - Languages: PHP, TypeScript, JavaScript. - Backend: Laravel, Node.js, Express.js. - CMS: Custom WordPress (Headless, Plugin/Theme Dev). - Frontend: React.js, Next.js, TailwindCSS. - Databases: PostgreSQL, MySQL, Supabase. - Infrastructure: Linux VPS, CI/CD pipelines, Real-time WebSockets (Reverb/SocketIO), Webhooks. - Payments & Integrations: Stripe, PayPal, Payment Intents, Checkout, Payment Links, Webhooks. - AI & Automation: LLM Integrations (Claude/OpenAI), Structured Outputs, AI Agents, Workflow Automation. ❯ PROJECT EXPERIENCE - Enterprise CX & SaaS: Built and scaled multi-tenant SaaS platforms for omni-channel data collection, integrations, analytics, and reporting. - MVP & PoC Development: Built startup MVPs with a focus on rapid delivery while maintaining a structured backend that can evolve as the product grows. - Custom Business Systems (MIS/ERP): Architected internal management systems including employee training portals, project management platforms, and enterprise EDMS solutions with role-based access control supporting 800+ users. - Enterprise WordPress & CMS: Built scalable WordPress solutions, custom plugins, headless WordPress sites, and WooCommerce integrations. - FinTech & E-commerce: Implemented Stripe and PayPal payment integrations, subscription billing, and dynamic pricing systems. - AI-Powered Platforms: Built LLM-powered customer service and validation systems using structured outputs and human-in-the-loop workflows to improve reliability. - Real-Time & Migration: Built real-time applications using WebSockets and migrated legacy systems to modern cloud infrastructure while maintaining service continuity. ❯ NEXT STEPS Send me your requirements, an existing repo, or even just a rough idea. I'll review it and suggest the most practical approach, along with a realistic scope and timeline. No obligation to commit. ❯ WHAT MY CLIENTS SAY ⭐⭐⭐⭐⭐ "If you want a full stack web developer who you can trust, that understands your goals and thinks ahead and also is very pleasant to work with I would recommend Debi. We've worked with him on several projects during the years, and it has always been top-notch deliveries. Highly recommended service provider!" ⭐⭐⭐⭐⭐ "Debi completed the work very quickly and to a high standard. Thank you!"