Tzvi Greenfeld

Entra (Identity) & Defender for Cloud

• Built secure CI/CD pipelines in Azure Gov Cloud, meeting strict compliance standards.
• Refactored core policy logic with a shared base class, improving testability, and reducing duplication.
• Owned and optimized the User Preferences service, cutting latency from approximately 20 minutes to 1 minute using concurrency.
• Resolved high-impact CRIs, improving system reliability, and reducing support load.
• Delivered new features in collaboration with PMs and designers; ensured stability via strong test coverage.
  Tech: C#, .NET, Azure, REST APIs, GitHub Actions, CI/CD.

• Angular: Integrated user analytics into Angular interfaces, driving UX improvements through data insights.
• Node.js and Neo4j: Improved backend stability and test coverage (+20%) using Node.js; optimized data modeling with Neo4j for high-load performance.
• React: Helped build and refine React components, streamlining cross-team feature development.
• Python & SQLAlchemy: Enhanced data automation and processing in PostgreSQL using Python and SQLAlchemy, boosting efficiency and accuracy.