NHSDigital/immunisation-fhir-api
Nov 2024 – Mar 2025
5 Months active
Languages Used
HCLJavaScriptPythonTOMLYAMLJavaTerraformXML
Technical Skills
API DevelopmentAPI IntegrationAWS LambdaAWS S3Backend DevelopmentCI/CD
CLJ2006
PROFILE
Clj2006
Clarissa John worked on the NHSDigital/immunisation-fhir-api, delivering features that improved data validation, infrastructure, and reliability for immunisation data flows. She consolidated FHIR-to-flat-JSON conversion pipelines, enhanced backend delta processing, and strengthened error handling to support safer, more maintainable deployments. Using Python and JavaScript, Clarissa expanded automated test coverage, integrated Splunk for observability, and modernized infrastructure with Terraform. Her work included refining API security, optimizing CI/CD pipelines, and ensuring robust data transformation and validation. By focusing on test-driven development and code quality, Clarissa enabled more reliable data ingestion, reduced regression risk, and improved the maintainability of the immunisation API.
Overall Statistics
Feature vs Bugs
83%Features
Repository Contributions
90Total
Bugs
5
Commits
90
Features
24
Lines of code
12,777
Activity Months5
Your Network
183 people
Work History
March 2025
18 Commits • 1 Features
Mar 1, 2025In 2025-03, delivered the FHIR to Flat JSON Conversion Pipeline and Delta Backend Enhancements for NHSDigital/immunisation-fhir-api. This work consolidated the FHIR data conversion module (including ConversionChecker), completed backend refactor, strengthened delta update error handling, and expanded test coverage to improve data transformation reliability and integration with the immunisation API. Key outcomes include more reliable data ingestion, reduced regression risk through extensive unit tests, and improved maintainability of the data pipeline. Technologies demonstrated include FHIR data modeling, JSON transformation, delta processing, backend refactor, and test-driven development.
18 Commits • 1 Features
Mar 1, 2025In 2025-03, delivered the FHIR to Flat JSON Conversion Pipeline and Delta Backend Enhancements for NHSDigital/immunisation-fhir-api. This work consolidated the FHIR data conversion module (including ConversionChecker), completed backend refactor, strengthened delta update error handling, and expanded test coverage to improve data transformation reliability and integration with the immunisation API. Key outcomes include more reliable data ingestion, reduced regression risk through extensive unit tests, and improved maintainability of the data pipeline. Technologies demonstrated include FHIR data modeling, JSON transformation, delta processing, backend refactor, and test-driven development.
March 2025
February 2025
2 Commits • 1 Features
Feb 1, 2025February 2025: Concentrated on improving reliability of the Record Forwarding Lambda in immunisation-fhir-api through expanded tests, better diagnostics, and CI configuration changes to support stable test discovery in SonarCloud.
February 2025
2 Commits • 1 Features
Feb 1, 2025February 2025: Concentrated on improving reliability of the Record Forwarding Lambda in immunisation-fhir-api through expanded tests, better diagnostics, and CI configuration changes to support stable test discovery in SonarCloud.
January 2025
18 Commits • 3 Features
Jan 1, 2025January 2025: Focused on stabilizing the immunisation-fhir-api, strengthening header governance, improving batch processing reliability, and elevating CI/CD visibility with SonarCloud. Delivered defensible API hygiene, enhanced test coverage, and faster feedback loops through automated pipelines.
18 Commits • 3 Features
Jan 1, 2025January 2025: Focused on stabilizing the immunisation-fhir-api, strengthening header governance, improving batch processing reliability, and elevating CI/CD visibility with SonarCloud. Delivered defensible API hygiene, enhanced test coverage, and faster feedback loops through automated pipelines.
January 2025
December 2024
29 Commits • 11 Features
Dec 1, 2024This month focused on infrastructure modernization, feature delivery, observability, and stability for NHSDigital/immunisation-fhir-api. Highlights include Terraform-based infrastructure updates enabling scalable deployments; vaccine type functionality with debugging support; enhanced logging plus tests and Splunk naming alignment; header removal and response handling improvements across flows; and CI-stabilizing test fixes and repository health updates. Business value includes faster, more reliable deployments, clearer telemetry, improved API correctness for vaccine data, and more dependable release cycles.
December 2024
29 Commits • 11 Features
Dec 1, 2024This month focused on infrastructure modernization, feature delivery, observability, and stability for NHSDigital/immunisation-fhir-api. Highlights include Terraform-based infrastructure updates enabling scalable deployments; vaccine type functionality with debugging support; enhanced logging plus tests and Splunk naming alignment; header removal and response handling improvements across flows; and CI-stabilizing test fixes and repository health updates. Business value includes faster, more reliable deployments, clearer telemetry, improved API correctness for vaccine data, and more dependable release cycles.
November 2024
23 Commits • 8 Features
Nov 1, 2024November 2024 (2024-11) focused on delivering robust data validation, expanding test reliability, infrastructure foundations, and enhanced observability for the NHSDigital immunisation FHIR API. The work strengthened data integrity, improved CI stability, and positioned the project for safer deployments and easier maintenance, aligning with business goals around patient safety, compliance, and system operability.
23 Commits • 8 Features
Nov 1, 2024November 2024 (2024-11) focused on delivering robust data validation, expanding test reliability, infrastructure foundations, and enhanced observability for the NHSDigital immunisation FHIR API. The work strengthened data integrity, improved CI stability, and positioned the project for safer deployments and easier maintenance, aligning with business goals around patient safety, compliance, and system operability.
November 2024
Activity
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Quality Metrics
Correctness78.2%
Maintainability78.0%
Architecture69.4%
Performance67.4%
AI Usage21.6%
Skills & Technologies
Programming Languages
HCLJSONJavaJavaScriptPythonTOMLTerraformXMLYAML
Technical Skills
API DevelopmentAPI GatewayAPI IntegrationAPI SecurityAPI TestingAWSAWS LambdaAWS S3Backend DevelopmentBoto3CI/CDCloud EngineeringCode QualityCode RefactoringData Conversion
Repositories Contributed To
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