Aanchal N.

Senior .NET developer — 10 years, 21,000+ hours, and a 100% Job Success Score. I build and modernize healthcare and enterprise software: FHIR-based clinical platforms, .NET Core migrations, and the API integrations that hold complex systems together. Most recently, I worked on a large FHIR-based digital care platform for a leading Dutch university medical center — a production system connecting hospital EHR data (HiX) to clinician-facing apps. It spans a .NET 8 / Azure Functions backend (FHIR R4 pipelines, SAML2/DigiD SSO, federated data access, AI-assisted care tooling) and a clinician (HCP) web app built in React/TypeScript, used by practitioners day to day. I also spent 2+ years building an enterprise payment and account-management ecosystem for universities and institutions — 21 projects covering a WCF/REST payment platform integrating 10+ gateways (TouchNet, Authorize.Net, PayPal, Moneris, Global Payments, FlyWire and more), a multi-tenant admin system with RBAC and audit logging, an e-commerce portal, and an Angular 15 front end. I spent 6 years as lead developer on HealthTrac (SetpointHealth), migrating a weight-management platform off Classic ASP & VB.NET onto .NET Core, Web API, and Vue.js, and integrating 9+ health-device APIs. If you have a healthcare/FHIR platform to build, an aging codebase to modernize, or a tangle of third-party integrations that need to just work, that's exactly my lane. What I do best: • Healthcare & FHIR — FHIR R4 pipelines, SMART-style auth flows, consent & RBAC in regulated environments • Backend & cloud — .NET 8 / .NET Core, C#, Web API, Azure Functions, Event Hubs, Service Bus, Key Vault, Hangfire, SignalR; MS SQL Server, Entity Framework • API design & integration — health-device APIs (Fitbit, Garmin, Withings, Google Fit, Dexcom, iHealth, Biosense, KetoMojo, Seca), messaging (Twilio, Plivo, SendGrid), Microsoft Graph • Payments & fintech — 10+ gateway integrations (TouchNet, Authorize.Net, PayPal, Moneris, Global Payments, Govolution, FlyWire, WeChat Pay), hosted payment pages, webhooks, auto-topup, reconciliation & reversals • AI-assisted features — Azure OpenAI, Semantic Kernel care assistants, speech-to-text consult transcription • Legacy modernization — Classic ASP / VB.NET → .NET Core, without breaking what already works • Front-end — React 18 / TypeScript (Redux, TanStack Query, Vite), Vue.js • Security — JWT/OAuth, Veracode-driven hardening, TLS 1.2, no-PHI-in-logs / audit practices I care about clean, tested, maintainable code and getting it right the first time. Clients keep me on long-term because I'm reliable, communicative, and I own outcomes end to end. Available for new projects now. Send me the problem, and I'll tell you honestly whether I'm the right fit.