SpecterOps/BloodHound
Oct 2024 – Jan 2026
13 Months active
Languages Used
GoCUESQLTypeScriptShellDockerfileJavaScriptMakefile
Technical Skills
API DevelopmentBackend DevelopmentData StructuresGraph DatabasesRefactoringType System
John Hopper
PROFILE
John Hopper
Over two years, Josh Hopper engineered core features and stability improvements for SpecterOps/BloodHound, focusing on scalable graph data processing and robust backend workflows. He delivered enhancements such as a retention management API, advanced Cypher query translation, and optimized group membership analysis, using Go, PostgreSQL, and ANTLR. His work included refactoring data migration pipelines, strengthening security through dependency updates, and improving test coverage for integration reliability. By streamlining code generation and parser logic, Josh enabled maintainable, high-performance analytics. His technical depth is evident in the breadth of backend, API, and database optimizations, consistently aligning implementation with evolving business and security needs.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
56Total
Bugs
14
Commits
56
Features
29
Lines of code
128,094
Activity Months13
Your Network
96 peopleWork History
January 2026
3 Commits • 1 Features
Jan 1, 2026January 2026 performance summary for SpecterOps/BloodHound focused on delivering a robust data handling feature, stabilizing post-processing workflows, and tightening security for the release cycle. The work moved the project closer to reliable, secure graph-based workflows with improved data accuracy and resilience in production pipelines.
3 Commits • 1 Features
Jan 1, 2026January 2026 performance summary for SpecterOps/BloodHound focused on delivering a robust data handling feature, stabilizing post-processing workflows, and tightening security for the release cycle. The work moved the project closer to reliable, secure graph-based workflows with improved data accuracy and resilience in production pipelines.
January 2026
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 — Focused on improving build stability, compatibility, and performance by updating Go module dependencies in SpecterOps/BloodHound. Delivered a targeted dependency refresh that enhances runtime efficiency and aligns with the next release cycle, while minimizing churn in the codebase.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 — Focused on improving build stability, compatibility, and performance by updating Go module dependencies in SpecterOps/BloodHound. Delivered a targeted dependency refresh that enhances runtime efficiency and aligns with the next release cycle, while minimizing churn in the codebase.
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025 — SpecterOps/BloodHound: Delivered a new Retention Management API for ingested files, enabling retention toggling and retrieval of retained files as a compressed archive. This feature strengthens data governance, supports policy-driven retention, and enables compliant, auditable access to stored data. No critical bugs reported; the retention flow was stabilized in preparation for broader rollout. Key reference: commit a4652935d18dcdab63170995498e509d3fe9507b (feat: BED-6656 implement tool api surface for toggling retention of ingest files).
1 Commits • 1 Features
Oct 1, 2025October 2025 — SpecterOps/BloodHound: Delivered a new Retention Management API for ingested files, enabling retention toggling and retrieval of retained files as a compressed archive. This feature strengthens data governance, supports policy-driven retention, and enables compliant, auditable access to stored data. No critical bugs reported; the retention flow was stabilized in preparation for broader rollout. Key reference: commit a4652935d18dcdab63170995498e509d3fe9507b (feat: BED-6656 implement tool api surface for toggling retention of ingest files).
October 2025
August 2025
1 Commits • 1 Features
Aug 1, 2025August 2025: Delivered enhancements to the BloodHound filtering and API surface, aligning data access with analytics needs and improving query reliability.
August 2025
1 Commits • 1 Features
Aug 1, 2025August 2025: Delivered enhancements to the BloodHound filtering and API surface, aligning data access with analytics needs and improving query reliability.
July 2025
7 Commits • 4 Features
Jul 1, 2025Monthly summary for SpecterOps/BloodHound (2025-07): Delivered four high-impact features with a focus on maintainability, performance, and reliability, accompanied by targeted bug fixes that strengthened operational stability. The work emphasizes business value through improved discovery reporting, faster analyses, and scalable data processing.
7 Commits • 4 Features
Jul 1, 2025Monthly summary for SpecterOps/BloodHound (2025-07): Delivered four high-impact features with a focus on maintainability, performance, and reliability, accompanied by targeted bug fixes that strengthened operational stability. The work emphasizes business value through improved discovery reporting, faster analyses, and scalable data processing.
July 2025
June 2025
3 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for SpecterOps/BloodHound: Completed significant enhancements to path query logic, ensured data integrity in aggregate results, and streamlined the Cypher parser for maintainability. Delivered three focused change areas: shortest path semantics fix in the PostgreSQL driver, null-element removal in cysql aggregates, and Cypher parser cleanup with externalization of DAWGS components. These changes reduce incorrect path calculations, improve data quality for graph analyses, and simplify future maintenance and scalability. Tech stack highlights include PostgreSQL driver improvements, CTE/parameter handling refinements, array_remove usage for null filtering, and refactoring toward an externalized DAWGS/Cypher parser structure.
June 2025
3 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for SpecterOps/BloodHound: Completed significant enhancements to path query logic, ensured data integrity in aggregate results, and streamlined the Cypher parser for maintainability. Delivered three focused change areas: shortest path semantics fix in the PostgreSQL driver, null-element removal in cysql aggregates, and Cypher parser cleanup with externalization of DAWGS components. These changes reduce incorrect path calculations, improve data quality for graph analyses, and simplify future maintenance and scalability. Tech stack highlights include PostgreSQL driver improvements, CTE/parameter handling refinements, array_remove usage for null filtering, and refactoring toward an externalized DAWGS/Cypher parser structure.
April 2025
22 Commits • 7 Features
Apr 1, 2025April 2025 monthly performance summary for SpecterOps/BloodHound. This period focused on stability, correctness, and developer productivity across core data transformation, query execution, and code-generation tooling. Deliverables include alignment with the latest codebase via merging stage/v7.2.1, targeted fixes in Cysql to improve translation reliability, enhancements to graph result handling, and performance-oriented refactors in Dawgs/DaWgs and code-generation pipelines (StBernard). These changes collectively raise data accuracy, reduce runtime surprises, and accelerate feature delivery while maintaining strong security and constraint integrity.
22 Commits • 7 Features
Apr 1, 2025April 2025 monthly performance summary for SpecterOps/BloodHound. This period focused on stability, correctness, and developer productivity across core data transformation, query execution, and code-generation tooling. Deliverables include alignment with the latest codebase via merging stage/v7.2.1, targeted fixes in Cysql to improve translation reliability, enhancements to graph result handling, and performance-oriented refactors in Dawgs/DaWgs and code-generation pipelines (StBernard). These changes collectively raise data accuracy, reduce runtime surprises, and accelerate feature delivery while maintaining strong security and constraint integrity.
April 2025
March 2025
3 Commits • 2 Features
Mar 1, 2025March 2025: Delivered stronger NTLM detection and graph query capabilities in BloodHound, enhancing security monitoring and response efficiency. Implemented bidirectional SP/ASP BFS for PostgreSQL, added new Cypher queries for NTLM attack paths, and improved data ingestion and Cypher translation pipelines. Completed codebase cleanup and license headers to align with BED-5540, improving maintainability and compliance. These changes contributed to faster threat detection, more flexible analytics, and a cleaner, auditable codebase.
March 2025
3 Commits • 2 Features
Mar 1, 2025March 2025: Delivered stronger NTLM detection and graph query capabilities in BloodHound, enhancing security monitoring and response efficiency. Implemented bidirectional SP/ASP BFS for PostgreSQL, added new Cypher queries for NTLM attack paths, and improved data ingestion and Cypher translation pipelines. Completed codebase cleanup and license headers to align with BED-5540, improving maintainability and compliance. These changes contributed to faster threat detection, more flexible analytics, and a cleaner, auditable codebase.
February 2025
3 Commits • 2 Features
Feb 1, 2025February 2025 performance summary for SpecterOps/BloodHound: Delivered core features to enhance data translation between Neo4j and PostgreSQL and accelerated large dataset migrations. Implemented CySQL Translation Module Improvements and Cypher Translation Enhancements, completed a batch-based Neo4j-to-PostgreSQL data migration approach, and increased reliability through extensive fixes and expanded test coverage. Internal refactors and handling of new data types position the project for more scalable translations and migrations, delivering measurable business value through faster migrations, more accurate translations, and improved maintainability.
3 Commits • 2 Features
Feb 1, 2025February 2025 performance summary for SpecterOps/BloodHound: Delivered core features to enhance data translation between Neo4j and PostgreSQL and accelerated large dataset migrations. Implemented CySQL Translation Module Improvements and Cypher Translation Enhancements, completed a batch-based Neo4j-to-PostgreSQL data migration approach, and increased reliability through extensive fixes and expanded test coverage. Internal refactors and handling of new data types position the project for more scalable translations and migrations, delivering measurable business value through faster migrations, more accurate translations, and improved maintainability.
February 2025
January 2025
5 Commits • 4 Features
Jan 1, 2025Month: 2025-01 – Monthly performance summary for SpecterOps/BloodHound focused on delivering business value through database-aware query translation, migration stability, code quality, and API usability. The month combined feature maturation with reliability improvements that reduce risk in production deployments and accelerate downstream analytics.
January 2025
5 Commits • 4 Features
Jan 1, 2025Month: 2025-01 – Monthly performance summary for SpecterOps/BloodHound focused on delivering business value through database-aware query translation, migration stability, code quality, and API usability. The month combined feature maturation with reliability improvements that reduce risk in production deployments and accelerate downstream analytics.
December 2024
3 Commits • 1 Features
Dec 1, 2024December 2024 — SpecterOps/BloodHound: Graph database backend and query engine enhancements delivered consolidated PostgreSQL backend improvements, Cypher processing enhancements, and CySQL integration, along with richer data typing and schema management. Implemented toString and toInt support, improved epoch handling and type inference, added coalesce, and strengthened integration test portability. This work improves data reliability, query capabilities, and developer efficiency while accelerating progress toward v6.3.x releases.
3 Commits • 1 Features
Dec 1, 2024December 2024 — SpecterOps/BloodHound: Graph database backend and query engine enhancements delivered consolidated PostgreSQL backend improvements, Cypher processing enhancements, and CySQL integration, along with richer data typing and schema management. Implemented toString and toInt support, improved epoch handling and type inference, added coalesce, and strengthened integration test portability. This work improves data reliability, query capabilities, and developer efficiency while accelerating progress toward v6.3.x releases.
December 2024
November 2024
2 Commits • 2 Features
Nov 1, 2024November 2024 monthly summary for SpecterOps/BloodHound focused on reliability, performance, and observability. Delivered two concrete features with testing and instrumentation to reduce risks in user synchronization and ingest task counting, aligning with business goals of data accuracy, operational readiness, and scalable monitoring.
November 2024
2 Commits • 2 Features
Nov 1, 2024November 2024 monthly summary for SpecterOps/BloodHound focused on reliability, performance, and observability. Delivered two concrete features with testing and instrumentation to reduce risks in user synchronization and ingest task counting, aligning with business goals of data accuracy, operational readiness, and scalable monitoring.
October 2024
2 Commits • 1 Features
Oct 1, 2024October 2024 monthly summary focused on delivering scalable data handling and ensuring correctness in BloodHound analysis pipelines. Key achievements include a crucial upgrade to graph ID handling for scalability and a targeted bug fix to transit-edge deletions in AD/Azure analyses.
2 Commits • 1 Features
Oct 1, 2024October 2024 monthly summary focused on delivering scalable data handling and ensuring correctness in BloodHound analysis pipelines. Key achievements include a crucial upgrade to graph ID handling for scalability and a targeted bug fix to transit-edge deletions in AD/Azure analyses.
October 2024
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Quality Metrics
Correctness87.4%
Maintainability84.4%
Architecture83.4%
Performance80.0%
AI Usage21.4%
Skills & Technologies
Programming Languages
CUEDockerfileGoJSONJavaScriptMakefilePLpgSQLSQLShellTypeScript
Technical Skills
ANTLRAPI DevelopmentAPI RefactoringActive DirectoryBackend DevelopmentBug FixingBuild SystemsBuild ToolsCI/CDCLI DevelopmentClean CodeCode AnalysisCode CleanupCode GenerationCode Merging
Repositories Contributed To
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