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David An

PROFILE

David An

David Anderson engineered robust backend systems for the broadinstitute/rawls and related repositories, focusing on scalable data management, API modernization, and developer productivity. He delivered features such as Quicksilver compact data tables, batch processing overhauls, and entity reference model upgrades, using Scala and SQL to optimize database operations and ensure data integrity. His work included CI/CD automation, build tooling upgrades, and observability enhancements with OpenTelemetry, improving reliability and deployment speed. By refactoring legacy components and streamlining API surfaces, David reduced technical debt and operational risk, demonstrating depth in system architecture, asynchronous programming, and cloud infrastructure management across complex, distributed environments.

Overall Statistics

Feature vs Bugs

76%Features

Repository Contributions

257Total
Bugs
38
Commits
257
Features
122
Lines of code
86,205
Activity Months15

Work History

January 2026

1 Commits • 1 Features

Jan 1, 2026

In January 2026, DataBiosphere/terra-ui delivered a strategic authentication enhancement by making the RAS Integration feature flag public, enabling NIH Researcher Authentication Service as an external identity provider, and removing the 'preview-ras-provider' group to broaden access to all users. This simplifies onboarding for NIH-affiliated researchers, expands authentication options, and positions Terra UI for wider adoption. The change is tracked under CTM-342 (#5478).

November 2025

1 Commits • 1 Features

Nov 1, 2025

Month: 2025-11 — DataBiosphere/terra-resource-buffer delivered a targeted dependency-management simplification for Jib and Jackson, improving maintainability and update safety. This work reduces build configuration complexity and enables more reliable dependency updates via automated tooling. No new user-facing features were released this month in this repository; the work focused on strengthening the foundation for future releases and reducing upgrade risk.

October 2025

27 Commits • 12 Features

Oct 1, 2025

October 2025: Stability, performance, and data quality enhancements across Sam, Rawls, and Firecloud Orchestration. Delivered cross-repo tooling upgrades, expanded Quicksilver adoption, and proactive build/licensing hardening to reduce risk and accelerate workflows.

September 2025

14 Commits • 10 Features

Sep 1, 2025

September 2025: Concise monthly summary across four repos (workbench-libs, rawls, firecloud-orchestration, sam). Delivered key features, reliability improvements, and library upgrades that reduce risk, improve data integrity, and enable scalable operations. Highlights include cross-repo API cleanups, migration tooling enhancements, caching for cost-efficiency, and API/workflow simplifications that lower operational overhead and cloud spend.

August 2025

34 Commits • 17 Features

Aug 1, 2025

August 2025 performance summary across rawls, firecloud-orchestration, and sam focused on stabilizing Quicksilver workflows, expanding governance, and upgrading build tooling. Delivered a suite of Quicksilver features and reliability fixes, improved data integrity and query performance, and upgraded core dependencies to boost reliability and security. Business value delivered includes more reliable batch operations, deterministic pagination, stronger transactional guarantees for submissions, and faster onboarding of new workspaces, reducing operational risk and enabling broader Quicksilver adoption.

July 2025

44 Commits • 18 Features

Jul 1, 2025

July 2025 performance highlights focused on architectural cleanup, feature delivery, observability, and developer experience improvements across Rawls, Orchestration, and Workbench libraries. Major work included removing Web Services Manager (WSM) integration and a broad set of workspace components, introducing Quicksilver name-based search, and upgrading infrastructure and testing practices to support faster, safer deployments. The month delivered measurable business value: reduced technical debt and surface area, improved cost visibility for storage, enhanced runtime observability with Grafana/OpenTelemetry metrics, and streamlined local development with non-LifeSciences buffers and GAR publishing. These efforts set the foundation for more reliable releases and lower maintenance costs while enabling faster experimentation and feature delivery across teams.

June 2025

22 Commits • 9 Features

Jun 1, 2025

June 2025 performance summary highlighting cross-repo delivery of migration, performance, and observability improvements across Rawls, Firecloud-Orchestration, and SAM. Key features delivered include the Compact Entity Migration and Quicksilver v2 serialization with a data-cleanup API to preserve data integrity; batch operation optimizations reducing noop updates and improving metadata access and caching; reliability enhancements for attribute deletion and hard-deletes with improved SQL handling and tracing; workspace management refactor to decouple dependencies and enhanced delete-workspace tracing for observability; and security/context improvements around snapshot access and UserInfo propagation, along with expanded audit/logging tracing. In addition, crash prevention for Cromwell-on-Quicksilver and CI/build tooling upgrades (sbt/docker images) were implemented across CI, development environments, and multiple repositories. These efforts collectively improve data integrity during migrations, reduce unnecessary writes, boost security and observability, and enhance build stability and delivery velocity across the portfolio.

May 2025

19 Commits • 5 Features

May 1, 2025

May 2025: Delivered major batch processing overhaul, entity-reference model overhaul, observability enhancements, and expanded testing for broadinstitute/rawls, along with legacy cleanup. The work improved batch throughput, data integrity, observability, and maintainability, aligning with business needs for scalable data management and faster, safer deployments.

April 2025

23 Commits • 9 Features

Apr 1, 2025

April 2025 performance summary: Delivered core platform improvements across Rawls, SAM, and firecloud-orchestration with a focus on scalable data access, API simplification, robustness, and CI reliability. Key features include Quicksilver compact data tables with workspace-level settings, provider support, entity operations, and migration tooling; streamlined API surface through removal of legacy endpoints; and enhanced database transaction management. Reliability gains come from an sbt upgrade (1.10.11), CI stability work (updated CRL json-smart, ubuntu-latest runners), and improved nightly SWAT workflows. Cleanup efforts remove legacy features to reduce technical debt, strengthening security and maintainability. Overall impact: faster data access, leaner APIs, more robust transactions, and more predictable builds for faster delivery and safer deployments.

March 2025

15 Commits • 7 Features

Mar 1, 2025

March 2025: Stability, performance, and security improvements across three core services with a clear emphasis on scalable cost reporting and safer API surfaces. Delivered foundational architectural refactors, performance enhancements, and governance changes that reduce risk and accelerate future delivery.

February 2025

9 Commits • 6 Features

Feb 1, 2025

February 2025: Delivered reliability and cost visibility improvements across SAM, Workbench Libs, RAWLS, and Firecloud Orchestration. Implemented resilient service account key retrieval, reduced workflow latency by removing polling, upgraded core libraries for stability, and expanded OpenAPI with actual vs estimated workflow costs. These changes improve credential access reliability, cut wait times, and provide clearer cost signals for planning and governance.

January 2025

18 Commits • 11 Features

Jan 1, 2025

January 2025 focused on stabilizing CI/CD tooling, hardening API surfaces, and expanding user-facing capabilities across the Broad platform. We delivered cross-repo build/tooling upgrades to the latest stable tooling, enhanced cost management and messaging, removed deprecated endpoints, strengthened error handling, and advanced user access/notification features. These changes reduce operational risk, improve developer productivity, and deliver clearer, more secure experiences for users and operators.

December 2024

16 Commits • 9 Features

Dec 1, 2024

December 2024 monthly highlights across three repositories: broadinstitute/rawls, broadinstitute/firecloud-orchestration, and broadinstitute/sam. Deliveries focused on cost governance, reliability, observability, and developer productivity, with build tooling and performance benchmarking enhancements. Key outcomes include cost-cap-aware submissions, improved observability via tracing, API routing simplification, and build/tooling upgrades that reduce risk and accelerate future work.

November 2024

13 Commits • 6 Features

Nov 1, 2024

November 2024 monthly summary emphasizing business value through feature work, stability/infra improvements, and build/dependency upgrades across multiple repositories. Key outcomes include BPM-compatible billing data model refinements, performance improvements in submission monitoring, a new file pairing API to improve data organization, and pipeline enhancements via SBt/docker upgrades and automated dependency reporting.

October 2024

1 Commits • 1 Features

Oct 1, 2024

October 2024 monthly summary for broadinstitute/firecloud-orchestration: Focused on modernizing the CI/CD build environment to improve security, reliability, and developer productivity. Implemented Docker image tag updates for sbt, scoverage, and scala-sbt to align with current tooling, and refreshed the Scala Steward commit message template to enhance automation and traceability. This work reduces build failures from outdated dependencies and accelerates the delivery pipeline for FireCloud orchestration.

Activity

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Quality Metrics

Correctness91.4%
Maintainability90.8%
Architecture88.8%
Performance85.2%
AI Usage20.2%

Skills & Technologies

Programming Languages

ConfDockerfileGitGroovyHCLHOCONJavaJavaScriptMarkdownProperties

Technical Skills

API DesignAPI DevelopmentAPI DocumentationAPI GatewayAPI IntegrationAPI ManagementAPI RemovalAPI TestingAPI VersioningAccess ControlActor ModelAkkaAkka ActorsAkka HTTPAkka Streams

Repositories Contributed To

6 repos

Overview of all repositories you've contributed to across your timeline

broadinstitute/rawls

Nov 2024 Oct 2025
12 Months active

Languages Used

JavaSQLScalaShellYAMLPropertiesDockerfileJavaScript

Technical Skills

API IntegrationActor ModelAsynchronous ProgrammingBackend DevelopmentBuild ConfigurationBuild Tools

broadinstitute/firecloud-orchestration

Oct 2024 Oct 2025
12 Months active

Languages Used

ScalaShellConfDockerfileJavaYAMLHOCONMarkdown

Technical Skills

Build ToolsDevOpsDockerAPI DevelopmentAPI IntegrationBackend Development

broadinstitute/sam

Nov 2024 Oct 2025
10 Months active

Languages Used

ScalaShellHOCONJavaYAMLHCL

Technical Skills

Build ToolsCI/CDDependency ManagementDockerBuild Tool ManagementContinuous Integration

broadinstitute/workbench-libs

Nov 2024 Sep 2025
5 Months active

Languages Used

YAMLScalaGitMarkdown

Technical Skills

CI/CDDependabotGitHub ActionsAPI DevelopmentAPI VersioningBackend Development

DataBiosphere/terra-resource-buffer

Nov 2025 Nov 2025
1 Month active

Languages Used

Groovy

Technical Skills

Gradlebuild automationdependency management

DataBiosphere/terra-ui

Jan 2026 Jan 2026
1 Month active

Languages Used

TypeScript

Technical Skills

feature flag managementfront end development

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