microsoft/fhir-server
Nov 2024 – Jul 2026
14 Months active
Languages Used
csymlC#YAMLHTTPJSONHTMLJavaScript
Technical Skills
CI/CDDockerFHIRUnit TestingBackend DevelopmentSDK Integration
Jared Erwin
PROFILE
Jared Erwin
Worked extensively on microsoft/fhir-server, delivering features and fixes that enhanced security, scalability, and reliability for healthcare data workflows. Built fine-grained authorization using SMART on FHIR v2 scopes, strengthened OAuth2 and OpenIddict integration, and implemented SSRF and XSS protections. Improved observability with OpenTelemetry-based metric filtering and expanded dynamic statistics for SQL queries. Upgraded SDKs, optimized CI/CD pipelines, and introduced adaptive authentication endpoint configuration for Azure compatibility. Applied C#, SQL, and ASP.NET Core to develop robust backend logic, enforce authorization policies, and streamline deployment with Infrastructure as Code, demonstrating depth in API development, security engineering, and test automation practices.
Overall Statistics
Feature vs Bugs
72%Features
Repository Contributions
22Total
Bugs
5
Commits
22
Features
13
Lines of code
17,495
Activity Months14
Your Network
4955 peopleSame Organization
@microsoft.com4939
GitOpsMember
Ananta GuptaMember
Abi GicicMember
Abigail HartmanMember
Abram SandersonMember
Adam EttenbergerMember
Adam KrantzMember
Alexandre GattikerMember
Ami HollanderMember
Work History
July 2026
1 Commits
Jul 1, 2026Month: 2026-07. Focused on security hardening and test coverage in microsoft/fhir-server. Key work included enforcing explicit delete data action for conditional delete operations, adding unit tests to verify denial when permissions are missing, and a minor typo fix from 'gradular' to 'granular'. These efforts strengthen data protection for healthcare records and align with compliance expectations. Delivered with a tightly scoped change set tied to authorization logic and test coverage.
1 Commits
Jul 1, 2026Month: 2026-07. Focused on security hardening and test coverage in microsoft/fhir-server. Key work included enforcing explicit delete data action for conditional delete operations, adding unit tests to verify denial when permissions are missing, and a minor typo fix from 'gradular' to 'granular'. These efforts strengthen data protection for healthcare records and align with compliance expectations. Delivered with a tightly scoped change set tied to authorization logic and test coverage.
July 2026
June 2026
2 Commits • 2 Features
Jun 1, 2026June 2026 monthly summary for microsoft/fhir-server: Implemented observability and statistics enhancements to improve monitoring efficiency and data accuracy. Delivered a pluggable exception metric emission filter in the OpenTelemetry log enricher to suppress noisy security exception metrics, and extended dynamic statistics for the FHIR server to support SQL NOT EXISTS queries for :missing=true with proper tracking of search parameters and ResourceSurrogateId constraints. The work includes unit and integration tests to validate accuracy and prevent fan-out, enabling downstream extensibility and more reliable metrics. Technologies involved include OpenTelemetry, dynamic statistics engine, ResourceSearchParamStats updates, and test automation.
June 2026
2 Commits • 2 Features
Jun 1, 2026June 2026 monthly summary for microsoft/fhir-server: Implemented observability and statistics enhancements to improve monitoring efficiency and data accuracy. Delivered a pluggable exception metric emission filter in the OpenTelemetry log enricher to suppress noisy security exception metrics, and extended dynamic statistics for the FHIR server to support SQL NOT EXISTS queries for :missing=true with proper tracking of search parameters and ResourceSurrogateId constraints. The work includes unit and integration tests to validate accuracy and prevent fan-out, enabling downstream extensibility and more reliable metrics. Technologies involved include OpenTelemetry, dynamic statistics engine, ResourceSearchParamStats updates, and test automation.
May 2026
3 Commits • 1 Features
May 1, 2026May 2026 - Microsoft/fhir-server: Delivered resilient test-suite enhancements and fixture-management improvements that directly reduce CI flakiness and prevent resource duplication in test environments. Consolidated three commits to strengthen test reliability for search parameter initialization and health check reporting; added support for the new reindexId parameter in search statuses; and implemented upsert for ValidateFixture to use PUT instead of POST, preventing duplicate StructureDefinitions in persistent test environments. Also fixed test files to remove flaky/fragile test conditions. These changes enhance test coverage, health monitoring, and test-data lifecycle management, resulting in more stable builds and safer, reproducible test runs.
3 Commits • 1 Features
May 1, 2026May 2026 - Microsoft/fhir-server: Delivered resilient test-suite enhancements and fixture-management improvements that directly reduce CI flakiness and prevent resource duplication in test environments. Consolidated three commits to strengthen test reliability for search parameter initialization and health check reporting; added support for the new reindexId parameter in search statuses; and implemented upsert for ValidateFixture to use PUT instead of POST, preventing duplicate StructureDefinitions in persistent test environments. Also fixed test files to remove flaky/fragile test conditions. These changes enhance test coverage, health monitoring, and test-data lifecycle management, resulting in more stable builds and safer, reproducible test runs.
May 2026
April 2026
2 Commits • 1 Features
Apr 1, 2026Month: 2026-04 — Microsoft/fhir-server security hardening: delivered key features and fixed critical security bugs. Narrative HTML Sanitizer hardening with a configuration option to reject dangerous href schemes (commit 71407edf80367a93676de87ff855aabff8ff84fc). SSRF protection and CodeQL remediation: suppressed SSRF warnings derived from server-side config and resolved a CodeQL warning in the OSS sample app (commit 869af6d79e72cf683f959c52bdea1afa036ce7a9). Overall impact: improved security posture, reduced exposure to XSS and SSRF, and enhanced compliance readiness. Technologies/skills demonstrated: security engineering, HTML sanitization, configuration-driven features, CodeQL remediation, risk reduction.
April 2026
2 Commits • 1 Features
Apr 1, 2026Month: 2026-04 — Microsoft/fhir-server security hardening: delivered key features and fixed critical security bugs. Narrative HTML Sanitizer hardening with a configuration option to reject dangerous href schemes (commit 71407edf80367a93676de87ff855aabff8ff84fc). SSRF protection and CodeQL remediation: suppressed SSRF warnings derived from server-side config and resolved a CodeQL warning in the OSS sample app (commit 869af6d79e72cf683f959c52bdea1afa036ce7a9). Overall impact: improved security posture, reduced exposure to XSS and SSRF, and enhanced compliance readiness. Technologies/skills demonstrated: security engineering, HTML sanitization, configuration-driven features, CodeQL remediation, risk reduction.
March 2026
4 Commits • 1 Features
Mar 1, 2026March 2026: Delivered security-hardening and interoperability enhancements for SMART on FHIR v2 in microsoft/fhir-server, with a focus on robust OAuth2/OIDC integration and secure endpoint calls. Key improvements include enhanced SMART configuration and OpenID Connect discovery, plus SSRF protection for SMART endpoint calls. These changes streamline client integrations, strengthen security posture, and lay groundwork for broader capabilities interoperability across the server.
4 Commits • 1 Features
Mar 1, 2026March 2026: Delivered security-hardening and interoperability enhancements for SMART on FHIR v2 in microsoft/fhir-server, with a focus on robust OAuth2/OIDC integration and secure endpoint calls. Key improvements include enhanced SMART configuration and OpenID Connect discovery, plus SSRF protection for SMART endpoint calls. These changes streamline client integrations, strengthen security posture, and lay groundwork for broader capabilities interoperability across the server.
March 2026
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for microsoft/fhir-server highlighting key feature delivery and major accomplishments. Focused on delivering flexible search capabilities and performance-oriented SQL improvements for ReferenceSearchParam to enhance query flexibility and speed.
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for microsoft/fhir-server highlighting key feature delivery and major accomplishments. Focused on delivering flexible search capabilities and performance-oriented SQL improvements for ReferenceSearchParam to enhance query flexibility and speed.
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026: Strengthened deployment security and operational efficiency for the Microsoft FHIR Server by enabling Azure Container Registry (ACR) pulls via a User Assigned Managed Identity (UAMI). This feature adds deployment template parameters for the UAMI resource ID and client ID to support secure image pulling, reducing credential exposure and simplifying authentication in deployment pipelines. All changes are tied to AB#181660 and include a targeted commit updating app service configuration for UAMI-based ACR pull.
1 Commits • 1 Features
Jan 1, 2026January 2026: Strengthened deployment security and operational efficiency for the Microsoft FHIR Server by enabling Azure Container Registry (ACR) pulls via a User Assigned Managed Identity (UAMI). This feature adds deployment template parameters for the UAMI resource ID and client ID to support secure image pulling, reducing credential exposure and simplifying authentication in deployment pipelines. All changes are tied to AB#181660 and include a targeted commit updating app service configuration for UAMI-based ACR pull.
January 2026
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 — Microsoft/FHIR-Server: Delivered Adaptive Authentication Endpoint Configuration for AadSmartProxy, enabling dynamic endpoint selection based on security settings and appropriate authorization/token endpoints. This feature enhances flexibility and security of the FHIR server's authentication flow. Implemented checks for AadSmartProxy well-known/smart-configuration and updated smart-configuration unit tests, contributing to improved reliability and maintainability. Result: stronger security posture, reduced configuration drift, and smoother cross-environment deployments for authentication workflows.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 — Microsoft/FHIR-Server: Delivered Adaptive Authentication Endpoint Configuration for AadSmartProxy, enabling dynamic endpoint selection based on security settings and appropriate authorization/token endpoints. This feature enhances flexibility and security of the FHIR server's authentication flow. Implemented checks for AadSmartProxy well-known/smart-configuration and updated smart-configuration unit tests, contributing to improved reliability and maintainability. Result: stronger security posture, reduced configuration drift, and smoother cross-environment deployments for authentication workflows.
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025 - microsoft/fhir-server: Implemented URL-encoded forward slash decoding in SMART scopes to enable Azure Entra ID compatibility. Added comprehensive unit tests covering %2f scenarios to ensure robust scope processing and access control alignment. The change, tracked against commit 27bfa9376b40ef90be1094167948c821df1c7d51 (#5213) with reference AB#12345, reduces integration friction for customers and broadens interoperability with Azure AD.
1 Commits • 1 Features
Nov 1, 2025November 2025 - microsoft/fhir-server: Implemented URL-encoded forward slash decoding in SMART scopes to enable Azure Entra ID compatibility. Added comprehensive unit tests covering %2f scenarios to ensure robust scope processing and access control alignment. The change, tracked against commit 27bfa9376b40ef90be1094167948c821df1c7d51 (#5213) with reference AB#12345, reduces integration friction for customers and broadens interoperability with Azure AD.
November 2025
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025: Delivered fine-grained SMART v2 scopes for FHIR authorization in microsoft/fhir-server, enabling per-resource access control with parameterized scopes. Implemented across the OpenIddict server, core FHIR services, and Cosmos DB integration to enforce new scope formats and access policies. This feature, backed by commit 22c2a262006e5065de684f6639b60628ec8c8423 ("Add support for SMART v2 cruds scopes (#5096)"), strengthens security and regulatory alignment while enabling customers to tailor data access more precisely. There were no major bug fixes reported this period; the focus was on feature delivery and infrastructure updates. Overall impact includes improved data security, policy-driven access, and a solid foundation for future CRUD-level scope extensions. Technologies demonstrated include OpenIddict, SMART v2 scopes, FHIR server components, and Cosmos DB policy enforcement, reflecting strengths in authentication/authorization design and scalable access control.
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025: Delivered fine-grained SMART v2 scopes for FHIR authorization in microsoft/fhir-server, enabling per-resource access control with parameterized scopes. Implemented across the OpenIddict server, core FHIR services, and Cosmos DB integration to enforce new scope formats and access policies. This feature, backed by commit 22c2a262006e5065de684f6639b60628ec8c8423 ("Add support for SMART v2 cruds scopes (#5096)"), strengthens security and regulatory alignment while enabling customers to tailor data access more precisely. There were no major bug fixes reported this period; the focus was on feature delivery and infrastructure updates. Overall impact includes improved data security, policy-driven access, and a solid foundation for future CRUD-level scope extensions. Technologies demonstrated include OpenIddict, SMART v2 scopes, FHIR server components, and Cosmos DB policy enforcement, reflecting strengths in authentication/authorization design and scalable access control.
April 2025
1 Commits
Apr 1, 2025April 2025: Monthly work summary for microsoft/fhir-server focusing on search parameter lifecycle consistency across derived resource types. Addressed a critical bug where search parameters were not removed from all applicable derived resource types; introduced GetDerivedResourceTypes to identify all derived resource types and ensure consistent search parameter management. The change improves data integrity and search accuracy across the server, reduces stale search parameter configurations, and strengthens maintainability by centralizing derived-type awareness.
1 Commits
Apr 1, 2025April 2025: Monthly work summary for microsoft/fhir-server focusing on search parameter lifecycle consistency across derived resource types. Addressed a critical bug where search parameters were not removed from all applicable derived resource types; introduced GetDerivedResourceTypes to identify all derived resource types and ensure consistent search parameter management. The change improves data integrity and search accuracy across the server, reduces stale search parameter configurations, and strengthens maintainability by centralizing derived-type awareness.
April 2025
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 — microsoft/fhir-server: Enhanced value-set handling and data integrity, delivering scalable validation improvements and robust safeguards. Key changes include increasing ValueSet expansion capacity and integrating LocalTerminologyService into the validator, plus a guard against updates to deleted search parameters. These changes improve reliability under high-volume vocabularies, reduce risk of data corruption, and lay groundwork for future scaling.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 — microsoft/fhir-server: Enhanced value-set handling and data integrity, delivering scalable validation improvements and robust safeguards. Key changes include increasing ValueSet expansion capacity and integrating LocalTerminologyService into the validator, plus a guard against updates to deleted search parameters. These changes improve reliability under high-volume vocabularies, reduce risk of data corruption, and lay groundwork for future scaling.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025: Completed a targeted feature upgrade and test expansion for microsoft/fhir-server. Upgraded Firely SDK to 5.11.3 and configured the build to target .NET 8.0 on Linux, paired with expanded end-to-end tests to include binary resources. Updated CI pipelines and project configurations to reflect the upgrade, improving release readiness and test reliability. No major bugs fixed this month; emphasis was on feature delivery and test infrastructure.
1 Commits • 1 Features
Feb 1, 2025February 2025: Completed a targeted feature upgrade and test expansion for microsoft/fhir-server. Upgraded Firely SDK to 5.11.3 and configured the build to target .NET 8.0 on Linux, paired with expanded end-to-end tests to include binary resources. Updated CI pipelines and project configurations to reflect the upgrade, improving release readiness and test reliability. No major bugs fixed this month; emphasis was on feature delivery and test infrastructure.
February 2025
November 2024
1 Commits • 1 Features
Nov 1, 2024November 2024: Delivered the Search Parameter Status Management feature for microsoft/fhir-server, introducing a new _source search parameter and aligning its status with parameter reporting. This enhances initialization, tracking, and visibility of search parameters, enabling better governance, reliability, and downstream query behavior for healthcare data workflows. Ancillary CI/CD work included temporarily removing the Trivy security scan due to external request issues and updating the Docker build to use a specific buildx image to improve CI/CD reliability. A representative change includes the commit 6525a6dfc391f4f3eba354b2d3910a7622b6a6cd with message "Update load of search param status on initialization (#4711)".
November 2024
1 Commits • 1 Features
Nov 1, 2024November 2024: Delivered the Search Parameter Status Management feature for microsoft/fhir-server, introducing a new _source search parameter and aligning its status with parameter reporting. This enhances initialization, tracking, and visibility of search parameters, enabling better governance, reliability, and downstream query behavior for healthcare data workflows. Ancillary CI/CD work included temporarily removing the Trivy security scan due to external request issues and updating the Docker build to use a specific buildx image to improve CI/CD reliability. A representative change includes the commit 6525a6dfc391f4f3eba354b2d3910a7622b6a6cd with message "Update load of search param status on initialization (#4711)".
Activity
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Quality Metrics
Correctness91.4%
Maintainability82.8%
Architecture84.6%
Performance78.2%
AI Usage30.0%
Skills & Technologies
Programming Languages
C#HTMLHTTPJSONJavaScriptYAMLcsyml
Technical Skills
API DevelopmentAPI SecurityAPI developmentASP.NET CoreArchitecture DesignAuthorizationAuthorization LogicAzureBackend DevelopmentC#CI/CDCosmos DBDependency InjectionDevOpsDocker
Repositories Contributed To
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