medplum/medplum
Sep 2024 – Apr 2026
16 Months active
Languages Used
CSSMarkdownJavaScriptTypeScriptYAMLBashJSONNone
Technical Skills
API designdocumentationfront end developmentresponsive designtechnical writingAPI Integration
Derrick Farris
PROFILE
Derrick Farris
Over 16 months, contributed to the medplum/medplum repository by building and maintaining backend and full stack features that improved reliability, deployment workflows, and interoperability in healthcare data systems. Leveraging TypeScript, Node.js, and Docker, delivered robust HL7 and FHIR integrations, scalable agent operations, and dynamic logging frameworks. Enhanced CI/CD pipelines, implemented secure configuration management, and introduced observability tooling using OpenTelemetry and Redis. Addressed operational risks through resilient error handling, automated testing, and documentation updates. The work emphasized asynchronous programming, API design, and DevOps practices, resulting in safer deployments, improved developer velocity, and more reliable real-time communication across distributed environments.
Overall Statistics
Feature vs Bugs
70%Features
Repository Contributions
254Total
Bugs
45
Commits
254
Features
104
Lines of code
211,551
Activity Months16
Your Network
56 peopleSame Organization
@medplum.com10
Shared Repositories
46
Work History
April 2026
19 Commits • 8 Features
Apr 1, 2026April 2026 monthly summary for medplum/medplum focusing on business value, reliability, and technical excellence. Key features delivered and bugs fixed built on robust CI/CD, enhanced observability, and safer runtime operations: Key features delivered: - HL7 connectivity reliability improvements: added graceful HL7 socket close handling and message tracker to retain in-flight messages after disconnections, increasing message durability in intermittently connected environments. - Admin UI and Redis payload refactor: updated Redis keys and payload structure to improve admin UI data handling and robustness. - OpenTelemetry ExponentialHistogram metrics view: introduced ExponentialHistogram view for finer-grained performance monitoring. Major bugs fixed: - Autoscaling safety: enforced minHealthyPercent = 100 to ensure all instances are healthy before scale-down, preventing under-provisioning during scale-down events. - CI secrets handling and security hardening: fixed missing secrets on forks and removed sensitive credentials from CI config to reduce exposure. Overall impact and accomplishments: - Strengthened deployment reliability and operational safety with safer autoscaling, reduced risk of scale-down outages, and improved handling of disconnections in HL7 workflows. - Improved observability and UI reliability through richer metrics and admin data handling, enabling faster issue diagnosis and more confident feature rollout. - Hardened CI/CD security posture and streamlined publishing workflows, supporting safer, faster delivery cycles. Technologies/skills demonstrated: - Cloud/container orchestration tuning (autoscaling safety) with CDK changes - HL7 protocol handling and message tracking - OpenTelemetry metrics instrumentation and ExponentialHistogram usage - Redis data modeling and admin UI integration - Secure CI/CD practices, secrets management, and fork safety
19 Commits • 8 Features
Apr 1, 2026April 2026 monthly summary for medplum/medplum focusing on business value, reliability, and technical excellence. Key features delivered and bugs fixed built on robust CI/CD, enhanced observability, and safer runtime operations: Key features delivered: - HL7 connectivity reliability improvements: added graceful HL7 socket close handling and message tracker to retain in-flight messages after disconnections, increasing message durability in intermittently connected environments. - Admin UI and Redis payload refactor: updated Redis keys and payload structure to improve admin UI data handling and robustness. - OpenTelemetry ExponentialHistogram metrics view: introduced ExponentialHistogram view for finer-grained performance monitoring. Major bugs fixed: - Autoscaling safety: enforced minHealthyPercent = 100 to ensure all instances are healthy before scale-down, preventing under-provisioning during scale-down events. - CI secrets handling and security hardening: fixed missing secrets on forks and removed sensitive credentials from CI config to reduce exposure. Overall impact and accomplishments: - Strengthened deployment reliability and operational safety with safer autoscaling, reduced risk of scale-down outages, and improved handling of disconnections in HL7 workflows. - Improved observability and UI reliability through richer metrics and admin data handling, enabling faster issue diagnosis and more confident feature rollout. - Hardened CI/CD security posture and streamlined publishing workflows, supporting safer, faster delivery cycles. Technologies/skills demonstrated: - Cloud/container orchestration tuning (autoscaling safety) with CDK changes - HL7 protocol handling and message tracking - OpenTelemetry metrics instrumentation and ExponentialHistogram usage - Redis data modeling and admin UI integration - Secure CI/CD practices, secrets management, and fork safety
April 2026
March 2026
8 Commits • 3 Features
Mar 1, 2026March 2026 (2026-03) monthly summary for medplum/medplum: Focused on reliability, scalability, and developer velocity. Delivered key features in subscription management and FHIRcast robustness, fixed critical context handling for DiagnosticReport events, and advanced CI/CD tooling to speed delivery. Business value realized includes reduced stale subscriptions, more reliable messaging with FHIRcast, fewer context-related errors, and faster PR-to-prod cycles through workflow improvements.
March 2026
8 Commits • 3 Features
Mar 1, 2026March 2026 (2026-03) monthly summary for medplum/medplum: Focused on reliability, scalability, and developer velocity. Delivered key features in subscription management and FHIRcast robustness, fixed critical context handling for DiagnosticReport events, and advanced CI/CD tooling to speed delivery. Business value realized includes reduced stale subscriptions, more reliable messaging with FHIRcast, fewer context-related errors, and faster PR-to-prod cycles through workflow improvements.
October 2025
5 Commits • 4 Features
Oct 1, 2025October 2025 highlights for medplum/medplum: delivered four key capabilities and reliability improvements focused on startup stability, observability, configurability, and documentation. Key outcomes include: HL7 Server startup reliability and async handling, reducing startup race conditions and ensuring correct port listening; Agent channel connection logging enhancements to improve observability of channel status; Dynamic logging level configuration via CLI to allow startup-time verbosity control; Comprehensive Medplum Agent Configuration Documentation covering required/optional parameters, logger settings, and security/performance best practices. These changes reduce downtime, accelerate debugging, and standardize agent deployment. The work demonstrates proficiency in asynchronous programming, structured logging, CLI parsing, and documentation discipline, contributing to stronger reliability, traceability, and security in production deployments.
5 Commits • 4 Features
Oct 1, 2025October 2025 highlights for medplum/medplum: delivered four key capabilities and reliability improvements focused on startup stability, observability, configurability, and documentation. Key outcomes include: HL7 Server startup reliability and async handling, reducing startup race conditions and ensuring correct port listening; Agent channel connection logging enhancements to improve observability of channel status; Dynamic logging level configuration via CLI to allow startup-time verbosity control; Comprehensive Medplum Agent Configuration Documentation covering required/optional parameters, logger settings, and security/performance best practices. These changes reduce downtime, accelerate debugging, and standardize agent deployment. The work demonstrates proficiency in asynchronous programming, structured logging, CLI parsing, and documentation discipline, contributing to stronger reliability, traceability, and security in production deployments.
October 2025
September 2025
19 Commits • 5 Features
Sep 1, 2025September 2025 performance summary for medplum/medplum focusing on observability, reliability, and developer productivity. Delivered five core features with end-to-end impact, fixed key tests and lint issues to stabilize CI, and provided documentation improvements to support production readiness. These results enhanced debugging capabilities, streamlined build processes, and expanded robust TCP communication channels, driving faster issue resolution and safer deployments.
September 2025
19 Commits • 5 Features
Sep 1, 2025September 2025 performance summary for medplum/medplum focusing on observability, reliability, and developer productivity. Delivered five core features with end-to-end impact, fixed key tests and lint issues to stabilize CI, and provided documentation improvements to support production readiness. These results enhanced debugging capabilities, streamlined build processes, and expanded robust TCP communication channels, driving faster issue resolution and safer deployments.
August 2025
8 Commits • 3 Features
Aug 1, 2025Summary of 2025-08: Delivered key features and fixes across HL7 integration, observability, and code quality. HL7 connection stability, throughput, and load management were consolidated to improve reliability and performance of HL7 communications. Introduced advanced logging with a new Pino backend and per-agent configuration to enhance diagnostics and incident response. Implemented code quality and documentation hygiene improvements, including ESLint no-only-tests rule and a docs typo fix. These workstreams collectively reduce HL7 errors, increase message throughput, improve operator visibility, and elevate maintainability and developer velocity, delivering business value through faster integration cycles and more reliable data interchange.
8 Commits • 3 Features
Aug 1, 2025Summary of 2025-08: Delivered key features and fixes across HL7 integration, observability, and code quality. HL7 connection stability, throughput, and load management were consolidated to improve reliability and performance of HL7 communications. Introduced advanced logging with a new Pino backend and per-agent configuration to enhance diagnostics and incident response. Implemented code quality and documentation hygiene improvements, including ESLint no-only-tests rule and a docs typo fix. These workstreams collectively reduce HL7 errors, increase message throughput, improve operator visibility, and elevate maintainability and developer velocity, delivering business value through faster integration cycles and more reliable data interchange.
August 2025
July 2025
13 Commits • 5 Features
Jul 1, 2025July 2025 monthly summary for medplum/medplum focusing on reliability, upgrade workflows, observability, deployment robustness, and documentation standardization. Highlights include delivering key HL7 messaging reliability improvements, enhanced agent lifecycle flows, expanded observability, more robust deployments, and naming consistency across docs. Key features delivered: - HL7 Messaging Reliability and Connection/Channel Management: improved handling of remote connection closures, automatic establishment of new connections when needed, preserving existing connections during channel reloads, and refined retry behavior for transactions. - Agent Upgrade and Downgrade Management: upgrade/downgrade flows enhanced with upgrade flag changes, ability to spawn an upgrader with a specified version, and graceful downgrades with warnings and force options. - Observability and Metrics for HL7 and Agent: added outbound request logs, per-request IDs in response logs, stats logging, logging enhancements, and test stability improvements. - Deployment Robustness and WebSocket Capacity: improved deployment defaults and per-user WebSocket subscription management via a global default and override settings. - Documentation and Naming Cleanup: standardized naming (e.g., FHIRCast) across docs and code comments for consistency. Major bugs fixed: - HL7: ensure connection is removed when remote closes, precise diff of channel config on reload, and adjusted retry jitter (+/-25%). - Agent: upgrade flag renamed to --agentVersion, upgrader spawned with specified version, and support for graceful downgrades to pre-zero-downtime versions. - Observability: fixed flaky FHIRcast WS tests and improved test stability; logging/metrics enhancements implemented. - Deployment: added empty defaults for Google/recaptcha in deploy scripts and refactored defaultMaxUserWebSocketSubscriptions configuration. - Documentation: corrected naming in docs (FHIRCast -> FHIRcast). Overall impact and accomplishments: - Increased reliability and resilience of HL7 messaging and channel handling, leading to higher uptime and fewer manual interventions. - Safer, more predictable upgrades/downgrades with clearer user feedback and options. - Enhanced observability enabling faster diagnosis and performance optimization. - More robust deployments and scalable per-user WebSocket capacity, improving live user experiences. - Consistent documentation and naming, reducing onboarding time and developer confusion. Technologies/skills demonstrated: - HL7 protocol reliability, channel management, and retry strategies - CLI and lifecycle tooling for upgrade/downgrade workflows - Observability instrumentation, logging, and metrics collection - Deployment scripting, configuration defaults, and environment hardening - Documentation discipline and naming standards for cross-team clarity
July 2025
13 Commits • 5 Features
Jul 1, 2025July 2025 monthly summary for medplum/medplum focusing on reliability, upgrade workflows, observability, deployment robustness, and documentation standardization. Highlights include delivering key HL7 messaging reliability improvements, enhanced agent lifecycle flows, expanded observability, more robust deployments, and naming consistency across docs. Key features delivered: - HL7 Messaging Reliability and Connection/Channel Management: improved handling of remote connection closures, automatic establishment of new connections when needed, preserving existing connections during channel reloads, and refined retry behavior for transactions. - Agent Upgrade and Downgrade Management: upgrade/downgrade flows enhanced with upgrade flag changes, ability to spawn an upgrader with a specified version, and graceful downgrades with warnings and force options. - Observability and Metrics for HL7 and Agent: added outbound request logs, per-request IDs in response logs, stats logging, logging enhancements, and test stability improvements. - Deployment Robustness and WebSocket Capacity: improved deployment defaults and per-user WebSocket subscription management via a global default and override settings. - Documentation and Naming Cleanup: standardized naming (e.g., FHIRCast) across docs and code comments for consistency. Major bugs fixed: - HL7: ensure connection is removed when remote closes, precise diff of channel config on reload, and adjusted retry jitter (+/-25%). - Agent: upgrade flag renamed to --agentVersion, upgrader spawned with specified version, and support for graceful downgrades to pre-zero-downtime versions. - Observability: fixed flaky FHIRcast WS tests and improved test stability; logging/metrics enhancements implemented. - Deployment: added empty defaults for Google/recaptcha in deploy scripts and refactored defaultMaxUserWebSocketSubscriptions configuration. - Documentation: corrected naming in docs (FHIRCast -> FHIRcast). Overall impact and accomplishments: - Increased reliability and resilience of HL7 messaging and channel handling, leading to higher uptime and fewer manual interventions. - Safer, more predictable upgrades/downgrades with clearer user feedback and options. - Enhanced observability enabling faster diagnosis and performance optimization. - More robust deployments and scalable per-user WebSocket capacity, improving live user experiences. - Consistent documentation and naming, reducing onboarding time and developer confusion. Technologies/skills demonstrated: - HL7 protocol reliability, channel management, and retry strategies - CLI and lifecycle tooling for upgrade/downgrade workflows - Observability instrumentation, logging, and metrics collection - Deployment scripting, configuration defaults, and environment hardening - Documentation discipline and naming standards for cross-team clarity
June 2025
12 Commits • 4 Features
Jun 1, 2025June 2025 monthly summary for medplum/medplum focusing on delivering scalable deployment, reliable agent operations, and improved interoperability. Key outcomes include: enhanced CI/CD and agent release workflows with ARM64 build support, secure placeholder-based configuration, corrected artifact paths, and versioned installer naming; zero-downtime agent upgrades and configurable client timeouts improving reliability and UX; per-user WebSocket concurrency limits to prevent abuse and optimize resource usage; HL7 enhanced mode acknowledgments with documented backward compatibility fixes; and stabilized FHIRcast WebSocket tests to reduce CI flakiness. These efforts collectively reduced deployment risk, improved uptime and client experience, and strengthened cross-system interoperability.
12 Commits • 4 Features
Jun 1, 2025June 2025 monthly summary for medplum/medplum focusing on delivering scalable deployment, reliable agent operations, and improved interoperability. Key outcomes include: enhanced CI/CD and agent release workflows with ARM64 build support, secure placeholder-based configuration, corrected artifact paths, and versioned installer naming; zero-downtime agent upgrades and configurable client timeouts improving reliability and UX; per-user WebSocket concurrency limits to prevent abuse and optimize resource usage; HL7 enhanced mode acknowledgments with documented backward compatibility fixes; and stabilized FHIRcast WebSocket tests to reduce CI flakiness. These efforts collectively reduced deployment risk, improved uptime and client experience, and strengthened cross-system interoperability.
June 2025
May 2025
11 Commits • 5 Features
May 1, 2025Summary for 2025-05: Delivered multiple high-value features and reliability improvements across medplum/medplum, focusing on improving reliability, observability, and release discipline. Highlights include FHIRcast context storage and resilient subscription handling, an Agent Logs fetch API, enhanced release preparation with requiredBefore-driven versioning and robust script handling, configurable transaction retry/backoff for server transactions, and CI/CD improvements for code quality and build performance. These efforts reduced incident exposure, improved troubleshooting, and accelerated release cycles.
May 2025
11 Commits • 5 Features
May 1, 2025Summary for 2025-05: Delivered multiple high-value features and reliability improvements across medplum/medplum, focusing on improving reliability, observability, and release discipline. Highlights include FHIRcast context storage and resilient subscription handling, an Agent Logs fetch API, enhanced release preparation with requiredBefore-driven versioning and robust script handling, configurable transaction retry/backoff for server transactions, and CI/CD improvements for code quality and build performance. These efforts reduced incident exposure, improved troubleshooting, and accelerated release cycles.
April 2025
28 Commits • 14 Features
Apr 1, 2025April 2025 monthly summary for medplum/medplum focused on reliability, performance, and developer experience improvements across core data processing, seeding, and deployment workflows. Major reliability fixes included reverting the validator upgrade and removing validator.isUUID usage to stabilize identifiers, adding timeouts to rest-hook fetch calls to prevent hanging requests, and improving startup resilience and upgrade handling. On the implementation side, the team delivered notable performance and observability improvements and expanded capabilities affecting data querying and deployment workflows. Business value is realized through faster, more reliable data processing, improved search precision for practitioners, enhanced scalability of background work, and more controllable CI deployments. Key operational enhancements include full-stack development tooling and documentation updates to support faster iteration and on-ramps for developers.
28 Commits • 14 Features
Apr 1, 2025April 2025 monthly summary for medplum/medplum focused on reliability, performance, and developer experience improvements across core data processing, seeding, and deployment workflows. Major reliability fixes included reverting the validator upgrade and removing validator.isUUID usage to stabilize identifiers, adding timeouts to rest-hook fetch calls to prevent hanging requests, and improving startup resilience and upgrade handling. On the implementation side, the team delivered notable performance and observability improvements and expanded capabilities affecting data querying and deployment workflows. Business value is realized through faster, more reliable data processing, improved search precision for practitioners, enhanced scalability of background work, and more controllable CI deployments. Key operational enhancements include full-stack development tooling and documentation updates to support faster iteration and on-ramps for developers.
April 2025
March 2025
6 Commits • 5 Features
Mar 1, 2025March 2025 (2025-03): Focused on tooling/deployment reliability, backend performance, and user-facing features. Delivered enhancements to the upgrade script and Docker tagging for safer, faster releases; relaxed CSP to support frontend integration; improved batch status retrieval with MGET for better performance and resilience; added CCDA validation and JSON download in CcdaDisplay; and reworked subscription attachments with broader test coverage and error handling. Overall, these efforts improved deployment speed, frontend capabilities, data validation workflows, and subscription reliability, driving value for development velocity and user experience.
March 2025
6 Commits • 5 Features
Mar 1, 2025March 2025 (2025-03): Focused on tooling/deployment reliability, backend performance, and user-facing features. Delivered enhancements to the upgrade script and Docker tagging for safer, faster releases; relaxed CSP to support frontend integration; improved batch status retrieval with MGET for better performance and resilience; added CCDA validation and JSON download in CcdaDisplay; and reworked subscription attachments with broader test coverage and error handling. Overall, these efforts improved deployment speed, frontend capabilities, data validation workflows, and subscription reliability, driving value for development velocity and user experience.
February 2025
22 Commits • 8 Features
Feb 1, 2025February 2025 performance focused on data migration reliability, versioning governance, and AsyncJob enhancements, paired with broader type-safety improvements and targeted bug fixes. Delivered server-side migration improvements, admin controls, and governance changes that reduce risk, accelerate data workflows, and improve maintainability.
22 Commits • 8 Features
Feb 1, 2025February 2025 performance focused on data migration reliability, versioning governance, and AsyncJob enhancements, paired with broader type-safety improvements and targeted bug fixes. Delivered server-side migration improvements, admin controls, and governance changes that reduce risk, accelerate data workflows, and improve maintainability.
February 2025
January 2025
60 Commits • 18 Features
Jan 1, 2025January 2025 monthly summary for medplum/medplum focusing on delivering key features, fixes, and improvements across authentication, CI/CD, observability, admin data management, and data migration readiness. The month delivered security-flexible auth flow, reliability and performance enhancements, and admin tooling for data versioning and migrations, enabling faster deployments and safer data migrations.
January 2025
60 Commits • 18 Features
Jan 1, 2025January 2025 monthly summary for medplum/medplum focusing on delivering key features, fixes, and improvements across authentication, CI/CD, observability, admin data management, and data migration readiness. The month delivered security-flexible auth flow, reliability and performance enhancements, and admin tooling for data versioning and migrations, enabling faster deployments and safer data migrations.
December 2024
13 Commits • 4 Features
Dec 1, 2024Month: 2024-12 | Focused on stability, security, and developer experience across medplum/medplum. Delivered database maintenance improvements, GraphQL/auth enhancements, frontend reliability work, and documentation fixes. These changes reduce operational risk, improve data integrity, and accelerate feature delivery for developers and customers.
13 Commits • 4 Features
Dec 1, 2024Month: 2024-12 | Focused on stability, security, and developer experience across medplum/medplum. Delivered database maintenance improvements, GraphQL/auth enhancements, frontend reliability work, and documentation fixes. These changes reduce operational risk, improve data integrity, and accelerate feature delivery for developers and customers.
December 2024
November 2024
12 Commits • 6 Features
Nov 1, 2024November 2024 Monthly Summary: Focused on reliability, correctness, and deployment resilience across core Medplum features. Delivered robust AsyncJob cancellation APIs, hardened agent connectivity, and strengthened data validation for Bundles and FHIR types, driving production stability and data integrity. Added scheduling UX enhancements, bot deployment timeout handling, and ongoing efforts to improve documentation and test stability. Business value was realized through safer cancellation workflows, more resilient real-time communication, improved data quality for FHIR resources, and more predictable bot deployments.
November 2024
12 Commits • 6 Features
Nov 1, 2024November 2024 Monthly Summary: Focused on reliability, correctness, and deployment resilience across core Medplum features. Delivered robust AsyncJob cancellation APIs, hardened agent connectivity, and strengthened data validation for Bundles and FHIR types, driving production stability and data integrity. Added scheduling UX enhancements, bot deployment timeout handling, and ongoing efforts to improve documentation and test stability. Business value was realized through safer cancellation workflows, more resilient real-time communication, improved data quality for FHIR resources, and more predictable bot deployments.
October 2024
15 Commits • 11 Features
Oct 1, 2024October 2024 monthly summary for medplum/medplum highlights a focused delivery across deployment, CLI UX, agent operations, PR workflow automation, and FHIRCast reliability, with a strong emphasis on reducing operational friction, improving data handling, and accelerating developer velocity. Key features delivered span bot deployment, agent management, PR automation, FHIRCast robustness, and search/performance enhancements, underpinned by documentation and test reliability improvements.
15 Commits • 11 Features
Oct 1, 2024October 2024 monthly summary for medplum/medplum highlights a focused delivery across deployment, CLI UX, agent operations, PR workflow automation, and FHIRCast reliability, with a strong emphasis on reducing operational friction, improving data handling, and accelerating developer velocity. Key features delivered span bot deployment, agent management, PR automation, FHIRCast robustness, and search/performance enhancements, underpinned by documentation and test reliability improvements.
October 2024
September 2024
3 Commits • 1 Features
Sep 1, 2024September 2024 monthly summary for medplum/medplum focusing on documentation enhancements for Agent features. Delivered three contributions improving clarity and usability: clarified minimum Agent version requirements, fixed a typo in features docs, and improved responsiveness/readability of video embeds. This work reduces onboarding time and support queries by providing precise guidance and a better user experience.
September 2024
3 Commits • 1 Features
Sep 1, 2024September 2024 monthly summary for medplum/medplum focusing on documentation enhancements for Agent features. Delivered three contributions improving clarity and usability: clarified minimum Agent version requirements, fixed a typo in features docs, and improved responsiveness/readability of video embeds. This work reduces onboarding time and support queries by providing precise guidance and a better user experience.
Activity
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Quality Metrics
Correctness93.6%
Maintainability88.6%
Architecture89.8%
Performance88.4%
AI Usage73.4%
Skills & Technologies
Programming Languages
BashCSSDockerfileJSONJavaScriptMarkdownNSISNoneSQLShell
Technical Skills
API DevelopmentAPI IntegrationAPI designAPI developmentAPI integrationAWSAWS CDKAWS LambdaAWS SDKAsynchronous ProgrammingAutomationBackend DevelopmentBash scriptingBuild AutomationBuild Configuration
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline