Zain Khalid M.

As a lead Full Stack Developer, I built '𝗩𝗼𝗻𝘇𝗮' from the ground up. This AI SaaS and business platform generates $70K+ in monthly recurring revenue and serves thousands of paying customers worldwide. I built its multi-tenant microservices architecture with ReactJS, Next.js, Node.js, NestJS, and MongoDB, and integrated Stripe Connect for payments. The platform includes 16+ tools for online courses, e-commerce, sales funnels, email marketing, and CRM, and has been in production for more than five years. 𝗪𝗛𝗔𝗧 𝗜 𝗖𝗔𝗡 𝗕𝗨𝗜𝗟𝗗 𝗙𝗢𝗥 𝗬𝗢𝗨: - Full Stack Web Development As a Full Stack Developer, I build responsive web applications, dashboards, admin panels, and marketplaces. I use ReactJS and Next.js for frontend development and Node.js and NestJS for backend services. Also, as a Full Stack Developer, I manage the work across frontend, backend, APIs, and deployment so the parts fit together. 𝗠𝗬 𝗦𝗘𝗥𝗩𝗜𝗖𝗘𝗦 𝗜𝗡𝗖𝗟𝗨𝗗𝗘: - ReactJS and Next.js application development - Node.js backend development and API integrations - REST and GraphQL API development - Database design with PostgreSQL, MongoDB, and Redis - Authentication, payment systems, and third-party integrations - Performance improvements and ongoing application support 𝗔𝗜 𝗦𝗮𝗮𝗦 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 I help businesses add useful AI features to new or existing products. For AI SaaS projects, I can build the application experience, backend services, AI workflows, and cloud deployment. I also help teams plan an AI SaaS MVP, connect models to business data, and prepare the product for real users. 𝗠𝘆 𝗔𝗜 𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝗶𝗻𝗰𝗹𝘂𝗱𝗲: - OpenAI and LLM integration - AWS Bedrock and RAG pipelines for document search and knowledge tools - Google Vertex AI for AI-powered analysis - Document processing, intelligent search, and workflow automation - AI usage monitoring and cost optimization - API integration 𝗠𝗬 𝗥𝗘𝗖𝗘𝗡𝗧 𝗪𝗢𝗥𝗞: 1: EdgeOCR - AI Document Processing My client needed to process large volumes of documents more efficiently. I built an AI processing pipeline using AWS Bedrock, connected it to a Node.js backend, and supported the product with a Next.js frontend, secure multi-tenant data handling, and usage-based Stripe billing. 2: GovDoc.AI - Government Contracting Government contractors needed a faster way to review RFPs and SOWs. I built RAG pipelines using AWS Bedrock and Cohere embeddings, helping users find relevant information in long documents more quickly. The solution combines AI services with a ReactJS and Next.js interface and Node.js backend. 3: Security AI I helped build real-time video analysis using Google Vertex AI, along with GPS tracking and AWS IoT Core device management for a security platform. 𝗜𝗡𝗗𝗨𝗦𝗧𝗥𝗜𝗘𝗦 𝗜 𝗦𝗨𝗣𝗣𝗢𝗥𝗧: - AI SaaS and subscription software - AI-powered business applications - E-commerce and online education - Document processing and knowledge management - Government contracting technology - Security and IoT platforms - Business automation and CRM systems - RAG chatbots and document search - Multi-tenant platforms and dashboards - SaaS billing and payment integrations 𝗠𝗬 𝗧𝗘𝗖𝗛𝗡𝗢𝗟𝗢𝗚𝗬 𝗦𝗧𝗔𝗖𝗞: - Frontend: ReactJS, Next.js, TypeScript. I use ReactJS to build clear, responsive interfaces for customer-facing products and internal tools. - Backend: Node.js, NestJS, Python - AI & LLMs: OpenAI, AWS Bedrock, Google Vertex AI, Cohere, RAG, LLMs - Databases: MongoDB, PostgreSQL, Redis - APIs & Payments: REST, GraphQL, Stripe Connect - Cloud & DevOps: AWS, Docker, Kubernetes, CI/CD 𝗛𝗢𝗪 𝗜 𝗖𝗔𝗡 𝗛𝗘𝗟𝗣: If you need a Full Stack Developer to build a product from the ground up, I can help plan the architecture, develop the frontend and backend, connect APIs, integrate payments, and prepare your application for production. If your product needs AI SaaS capabilities, I can integrate LLMs, document search, RAG, and AI workflows into your existing systems or new MVP. I focus on practical solutions, clean code, and software that supports real business goals. Whether you’re building a SaaS platform, modernizing a web application, or adding AI features, 𝗹𝗲𝘁'𝘀 𝗱𝗶𝘀𝗰𝘂𝘀𝘀 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗮𝗻𝗱 𝗵𝗼𝘄 𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽 𝗯𝗿𝗶𝗻𝗴 𝗶𝘁 𝘁𝗼 𝗹𝗶𝗳𝗲.