.NET EHR FHIR Completion

I already have a web-based EHR written in .NET that stalled before launch. The core workflows are in place, yet three areas still block us from going live:

• Bug fixing (top priority): the current build shows several UI/UX inconsistencies, a handful of security gaps around authentication/authorization, and broken FHIR calls that return empty payloads or 500 errors.
• FHIR integration: the R4 endpoints exist but half of the resources are unmapped and the conformance statement fails validation.
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I need someone who has shipped an EHR or similar health-tech product, is comfortable working in C#, ASP.NET Core, Entity Framework, and knows the HL7 FHIR spec inside out. Familiarity with ONC certification criteria—USCDI data classes, SMART on FHIR launch, etc.—will make your life easier but isn’t mandatory.

Deliverables I expect:
1. All critical bugs resolved with notes on what changed and why.
2. A fully functional FHIR layer that passes online validators and unit tests.
3. A finished QCM that lets staff create, publish, and score surveys from the UI.
4. A short hand-off document plus recorded demo showing the above in action.

I’ll provide the private repo, current backlog, and sample data on acceptance. Let’s wrap this project so we can push to production without surprises.