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Jessie Grosen

PROFILE

Jessie Grosen

Worked extensively on the semgrep/semgrep and semgrep/semgrep-interfaces repositories, delivering features and fixes that improved CI/CD reliability, release workflows, and code quality. Focused on backend development and DevOps, this work included stabilizing test pipelines, enhancing taint analysis, and refactoring telemetry endpoint logic for maintainability. Leveraged Python, OCaml, and Bash scripting to address issues such as flaky tests, dependency management, and Windows-specific bugs. Introduced digest-based Docker image validation, implemented OpenFGA language support, and clarified contribution processes. These efforts resulted in more predictable deployments, streamlined release management, and improved feedback cycles, supporting scalable development and higher-quality releases across platforms.

Overall Statistics

Feature vs Bugs

74%Features

Repository Contributions

37Total
Bugs
5
Commits
37
Features
14
Lines of code
2,301
Activity Months7

Work History

May 2026

7 Commits • 5 Features

May 1, 2026

May 2026 monthly summary focusing on key accomplishments, major bugs fixed, and overall impact across two repositories (semgrep/semgrep and semgrep/semgrep-interfaces). The period centered on improving release reliability, code organization for telemetry endpoints, and clarifying contribution processes to reduce misrouted work.

April 2026

1 Commits • 1 Features

Apr 1, 2026

April 2026 monthly summary focused on delivering a significant taint-analysis enhancement for the semgrep/semgrep repository, with cross-language semantics preserved and improved dependency tracking.

March 2026

1 Commits

Mar 1, 2026

March 2026 (2026-03) – Semgrep Rules: Stabilized test reliability by resolving shadowing and collisions caused by duplicate function names in test files. The change removes naming conflicts while preserving all actual matches, leading to more stable test outcomes and clearer rule evaluation feedback. This work reduced flaky tests, strengthening CI confidence and accelerating feedback loops for rule development.

February 2026

2 Commits • 1 Features

Feb 1, 2026

February 2026 focused on stabilizing OSS testing pipelines and enabling experimental OpenFGA support in the interfaces layer. Delivered a digest-based fix for OSS Docker tests to prevent CI flakiness and introduced the OpenFGA language type (Fga) with careful backward compatibility and codegen updates. These efforts improved CI reliability, prepared for unified docker/build flows, and expanded supported features for the Semgrep ecosystem.

January 2026

15 Commits • 3 Features

Jan 1, 2026

January 2026 monthly summary for semgrep/semgrep: Key themes were CI/CD stability and performance, reliable autofix behavior, Windows subprocess reliability, and packaging/release process enhancements. Delivered across several features and fixes with measurable improvements in CI times, build reliability, and release workflows. This progress contributed to faster feedback, higher PR quality, and more predictable deployments.

December 2025

5 Commits • 3 Features

Dec 1, 2025

Concise monthly summary for 2025-12 focusing on key features delivered, major bugs fixed, and the overall impact of work at semgrep/semgrep. The month emphasizes improved CI reliability, stability in benchmarks, and stronger dependency management to support reliable, scalable development.

November 2025

6 Commits • 1 Features

Nov 1, 2025

November 2025: Focused on delivering CI pipeline reliability, observability, and configuration enhancements for semgrep/semgrep. Implemented cross-platform test observability via Datadog for Linux and Windows, standardized Docker build job naming, upgraded linting tooling, and optimized workflow stages to run tests at appropriate points. Addressed flaky tests by disabling a problematic test, corrected Linux build-and-test job naming to reduce confusion, and updated pre-commit tooling (Hadolint). Also scoped CLI tests to reduce CI noise by excluding pro-nightly runs. The work reduced CI instability, improved feedback cycles, and provided clearer telemetry for faster debugging and higher-quality releases.

Activity

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Quality Metrics

Correctness95.2%
Maintainability88.6%
Architecture88.6%
Performance89.8%
AI Usage24.8%

Skills & Technologies

Programming Languages

JSONJSONNETJavaScriptJsonnetMarkdownOCamlPythonRubyShellTypeScript

Technical Skills

API integrationAST manipulationBash scriptingCI/CDCLI DevelopmentCLI developmentCode AnalysisContinuous IntegrationDevOpsDockerDocumentationGitHub ActionsJavaScriptMonitoringOCaml

Repositories Contributed To

3 repos

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

semgrep/semgrep

Nov 2025 May 2026
6 Months active

Languages Used

JSONJavaScriptJsonnetPythonYAMLOCamlJSONNETMarkdown

Technical Skills

CI/CDContinuous IntegrationDevOpsDockerGitHub ActionsJavaScript

semgrep/semgrep-interfaces

Feb 2026 May 2026
2 Months active

Languages Used

JSONOCamlPythonMarkdownplaintext

Technical Skills

CLI developmentbackend developmentlanguage designdocumentationrelease managementrepository management

semgrep/semgrep-rules

Mar 2026 Mar 2026
1 Month active

Languages Used

JavaScriptPythonRubyTypeScript

Technical Skills

function refactoringsecurity auditingtest-driven development