Sunil S.

⭐ Top Rated Plus · 100% Job Success · $10K+ earned on Upwork 💼 10+ years building enterprise apps for international clients 🧩 TypeScript/Node.js APIs · Angular/Ionic apps · SAP BTP integrations 🤖 AI evaluation: scoring rubrics, model responses, written rationales ☁️ Automated testing, CI/CD, cloud deployment, and production support Need a new web app, a reliable API, or help with an existing system? I work from requirements and API design through deployment and production fixes. I start by understanding your goal, then define a practical scope and next steps. My experience includes consumer booking APIs, Node.js logic for an SAP BTP transfer pricing and profit simulation app, Angular/Node.js workforce software with Xero payroll integration, and a school communication platform. ⭐ Web Apps, APIs & Integrations ✅ REST APIs — TypeScript, Node.js, Python, and FastAPI. ✅ Web and mobile apps — Angular and Ionic. ✅ Business systems and data — SAP BTP, SAP HANA, MongoDB, and third-party APIs. ✅ Authentication and access control — OAuth 2.0 and XSUAA. ⭐ AI Evaluation & Development Support ✅ Model response evaluation — score against clear rubrics and explain each score in writing. ✅ Evaluation advice — review scoring criteria, sample responses, and feedback. ✅ AI-enabled app planning — define the APIs, data flow, integrations, authentication, and tests around an AI feature. ⭐ Testing, Delivery & Support ✅ Unit and integration tests to check important workflows. ✅ CI/CD with GitHub Actions, Jenkins, and Azure DevOps. ✅ Deployments and production support on AWS, Cloud Foundry, and Heroku. Share what you want to build or fix, what already exists, and your main concern. I will help you choose a clear next step.