react.js , Unit Testing, PostgreSQL, Typescript, Javascript, Docker, MySQL, Integration Testing, AWS, Node.js, Css3, Html5, Rest Apis, API Integrations, CI CD Pipelines, Gemini API, API Architecture, Retrieval-Augmented Generation, GitHub Actions, Next.js, AI Workflow Design, Software Architecture Design, Playwright, end-to-end testing, Multi-Tenant SaaS Architecture, OpenAI API, Enterprise Integration Design, Backend Architecture Design, Claude API, Prompt Engineering