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David An

PROFILE

David An

David An worked across DataBiosphere/jade-data-repo, broadinstitute/rawls, and sam, building backend features and improving system stability. He enhanced web security in jade-data-repo by configuring SameSite cookie properties in Spring Boot to prevent CSRF attacks, and addressed Java 17 compatibility by managing Jersey dependencies. In rawls, David designed and optimized database tables for Quicksilver correction analysis, implemented batch processing, and introduced indexing to accelerate workspace queries. He also improved build reliability in sam by upgrading Scala and SBT tooling. His work demonstrated depth in Java, Scala, and SQL, with a focus on backend development, dependency management, and performance optimization.

Overall Statistics

Feature vs Bugs

82%Features

Repository Contributions

15Total
Bugs
2
Commits
15
Features
9
Lines of code
787,911
Activity Months5

Work History

March 2026

2 Commits • 2 Features

Mar 1, 2026

March 2026 monthly summary for broadinstitute/rawls: Focused on delivering operational control for data processing and strengthening dependency stability to reduce risk in deployments. Key features were implemented to toggle monitoring and to align library/dependency handling with the latest ecosystem changes, improving long-term maintainability and compatibility across services. These updates position the project for smoother releases and safer operations in production.

February 2026

1 Commits

Feb 1, 2026

February 2026 monthly summary for DataBiosphere/jade-data-repo focusing on stability improvements and Java 17 compatibility.

January 2026

1 Commits • 1 Features

Jan 1, 2026

January 2026 monthly summary for DataBiosphere/terra-resource-buffer focused on stabilizing dependency updates and ensuring Spring Boot 4 compatibility by adjusting Dependabot configuration. No major bugs reported this month. This work preserves compatibility, reduces upgrade churn, and supports ongoing maintainability of the repository.

December 2025

10 Commits • 5 Features

Dec 1, 2025

December 2025 performance summary: Delivered high-impact features, fixed critical bugs, and boosted performance across rawls and sam. Key features include Quicksilver Correction Analysis with new entity corrections tables, batch processing, monitoring, and performance optimizations; EntityComponent cleanup to remove unused specifications and legacy data structures; dependency management improvements with Liquibase 4.x and jersey 3.x pins and rollback of unstable upgrades; a new index on WORKSPACE_SETTINGS to speed workspace queries; and Build System improvements in sam via upgrades to Scala, SBT, and SBT-Scoverage. Major bugs fixed include safe handling when corrections are not a list and short-circuiting when zero corrections, plus restoring stability by reverting unstable dependency updates. Overall impact: faster data correction workflows, faster and more scalable workspace queries, more reliable builds, and reduced maintenance burden. Technologies/skills demonstrated: database design and optimization, batch processing, indexing, code cleanup, dependency management, and modern build tooling (Scala/SBT/SBT-Scoverage).

November 2025

1 Commits • 1 Features

Nov 1, 2025

November 2025: Security configuration enhancement in DataBiosphere/jade-data-repo by introducing a SameSite=lax cookie property in Spring Boot to prevent CSRF. Associated with CTM-170 (#2054); commit c37dba68e513c66e51212c41e06e1f5eeca53906.

Activity

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Quality Metrics

Correctness97.4%
Maintainability93.4%
Architecture94.6%
Performance94.6%
AI Usage21.4%

Skills & Technologies

Programming Languages

DockerfileGroovyJavaScalaShellXMLYAML

Technical Skills

Continuous IntegrationDevOpsDockerGradleJavaSBTSQLScalaSpring BootWeb Securityactor-based concurrencybackend developmentconfiguration managementdatabase managementdatabase optimization

Repositories Contributed To

4 repos

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

broadinstitute/rawls

Dec 2025 Mar 2026
2 Months active

Languages Used

ScalaXMLDockerfileJavaYAML

Technical Skills

SQLScalaactor-based concurrencybackend developmentdatabase managementdatabase optimization

DataBiosphere/jade-data-repo

Nov 2025 Feb 2026
2 Months active

Languages Used

JavaGroovy

Technical Skills

Spring BootWeb SecurityGradleJavabackend development

broadinstitute/sam

Dec 2025 Dec 2025
1 Month active

Languages Used

ScalaShell

Technical Skills

Continuous IntegrationDockerSBTScaladependency management

DataBiosphere/terra-resource-buffer

Jan 2026 Jan 2026
1 Month active

Languages Used

YAML

Technical Skills

configuration managementdependency management