SYED HASSNAIN

Developed and maintained production full-stack applications across web, SaaS, mobile, cloud, and AI-enabled systems using JavaScript/TypeScript, React, Next.js, Node.js, Flask/Django, and PHP/Laravel. Designed and built REST and GraphQL APIs, data models, authentication systems, real-time features, automation/workflow integrations, and third-party service integrations. Diagnosed complex issues across frontend state, API contracts, backend services, databases, authentication flows, integrations, networking, and production environments. Worked effectively inside existing and unfamiliar codebases by refactoring legacy components, upgrading dependencies, and implementing new functionality safely; also reviewed code for correctness, performance, security, maintainability, and reliability. Integrated AI capabilities using OpenAI APIs, Google Vertex AI, Gemini, document AI, and vector embeddings/services; supported CI/CD and cloud deployments on AWS/GCP with Docker and monitoring.

Built production full-stack web and SaaS applications using React, Node.js, JavaScript/TypeScript, and PHP/Laravel along with REST APIs and SQL/NoSQL databases. Developed responsive user interfaces with reusable components, backend services, APIs, authentication flows, and third-party integrations. Debugged application failures across frontend, backend, API services, databases, and production environments while improving performance and reliability. Contributed to architecture improvements, performed code reviews, and supported testing and deployments within existing codebases.

Developed full-stack web applications using JavaScript, React.js, Node.js, REST APIs, HTML, CSS, and database technologies. Built frontend features, backend services, API integrations, and database-driven functionality. Handled debugging, testing, performance optimization, deployments, and production support. Collaborated with product, design, and engineering teams to deliver end-to-end application features.