Waj A.

Senior Full Stack Developer | AI Engineer | SaaS, AI Agents & Web Applications Looking for a developer who can build a complete web application, scale your SaaS product, or integrate AI into your existing system? I'm a Full Stack Developer and AI Engineer with 7+ years of development experience, specializing in web applications, SaaS platforms, backend systems, API integrations, and AI-powered products. I work across the full development lifecycle, from frontend development and backend architecture to database integration and AI implementation. FULL-STACK WEB DEVELOPMENT I build modern, responsive, and maintainable applications using: - Frontend:React, Next.js, JavaScript, TypeScript - Backend: Node.js, Python, Express.js, FastAPI - Databases: PostgreSQL, MongoDB, Supabase - Development: Full-stack applications, REST APIs, SaaS platforms, dashboards, authentication, and third-party integrations - Quality & Maintenance: Debugging, testing, QA, performance optimization, refactoring, and feature development Whether you're starting from scratch or improving an existing application, I can help develop reliable solutions across the frontend and backend. AI ENGINEERING & LLM APPLICATIONS I build AI-powered applications that integrate language models, intelligent agents, and conversational interfaces into practical software products. - AI Agent Development: AI agents, assistants, tool calling, and integrations with external services. - LLM Integration: OpenAI API and language-model integration in web applications. - RAG Systems: Retrieval-Augmented Generation for knowledge-based, context-aware applications. - AI Chatbots: Conversational applications for customer support, productivity, and business use cases. - Voice AI: AI voice agents and conversational AI integrations. - AI Applications: Document processing, content generation, intelligent search, and AI-assisted workflows. - AI Frameworks: LangChain and LangGraph for relevant agent and LLM workflows. My focus is on integrating AI into reliable applications, connecting models with APIs and data sources, and delivering functionality that serves a clear purpose. SAAS DEVELOPMENT & API INTEGRATIONS I can help you build or extend SaaS products, develop backend services, connect third-party platforms, integrate AI models, create dashboards, and implement new application features. I also work on existing codebases to troubleshoot issues, improve performance, refactor code, and make applications easier to maintain. MY APPROACH I start by understanding your requirements and technical setup, then identify the right architecture and implementation strategy. Throughout development, I prioritize clean code, reliable integrations, testing, maintainability, and clear communication. LET'S DISCUSS YOUR PROJECT Whether you need a Full Stack Developer for a web application or SaaS platform, or an AI Engineer to build agents, chatbots, and LLM-powered features, I can help turn your requirements into a working solution. Share your project goals, current setup, and key challenges so we can determine the right technical approach.