Shulamit H.

Responsibilities:

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  Tenant Management System

  Building tenant management whose role is to provide data on tenants and prevent unauthorized access. Built by CLI tool + FastAPI server

  Performance Optimization

  Adding Redis caching to tenant management to allow faster access. Access is done by decorators that refer to a quick check in the cache area in memory before an expensive access to the DB on disk.

  Maintenance and Cleanup

  Create a monthly scheduler to clean up the archive in the DB. Uses message queues for jobs scheduled into it by apscheduler, rq, and Redis

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• Generic Tagging Infrastructure

  Core Design

  I designed a generic tag system that uses many-to-many relationships for cross-tagging and efficient execution of scenarios.

  Service Exposure

  Creating a FastAPI server for the tagging system to provide this service to all services in the system. Provides easy access to filtering and retrieving information based on tags, as well as security for authorized access only.

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• CI/CD and Quality Assurance

  Established full CI/CD pipelines via GitHub Actions for automated validation.

  Automated Tests (pytest)

  • Testing the syntax of .JSON files, importing pyproject.toml files.
  • Testing proper communication of all MCP servers and their tuple list using lang chain, and comparing the output to the expected output by gemini-google.

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• Video Processing and Attention Analysis System

  Facial Landmark Extraction

  I built a video-processing component in Python that uses the MediaPipe Face Mesh model to detect facial landmarks and extract precise eye and head positions from each frame. I implemented a signal-smoothing mechanism using a five-frame moving window to stabilize rapid fluctuations in the raw landmark data and ensure clean, reliable signals before further analysis.

  Head Pose Estimation

  I added a head-pose estimation module that computes a Rotation Matrix derived from MediaPipe’s 3D facial landmarks. Using OpenCV’s Perspective-n-Point (PnP) solver, I generated the rotation matrix R and extracted Pitch and Yaw angles for real-time analysis of gaze direction. This stage established the foundation for future expansion toward full 3D orientation tracking.

  Attention Classification

  I developed an attention-classification mechanism based on head angles and gaze signals, where I defined dynamic thresholds distinguishing between three attention levels: Focused, Normal, and Distracted. The classifier uses the Gaze Aversion Rate (GA Rate), the Eye-Aspect Ratio (EAR) for blink detection, and off-screen time tracking to produce an overall attention summary at the end of video processing.

  Reporting and Visualization

  I created an automated results-reporting layer in Python that stores per-frame states, aggregate statistics, and temporal patterns of attention. I integrated visualization capabilities using Matplotlib to generate graphs showing changes in attention over time, and designed the structure so it can later connect to an external dashboard or a CI/CD pipeline.

• Creating a FastAPI server for the tagging system to provide this service to all services in the system. Provides easy access to filtering and retrieving information based on tags, as well as security for authorized access only.

• Established full CI/CD pipelines via GitHub Actions for automated validation. Two tests verified using pytest: 1. Testing the syntax of .JSON files, importing pyproject.toml files. 2. Testing proper communication of all MCP servers and their tuple list using lang chain, and comparing the output to the expected output by gemini-google.

• I built a video-processing component in Python that uses the MediaPipe Face Mesh model to detect facial landmarks and extract precise eye and head positions from each frame. I implemented a signal-smoothing mechanism using a five-frame moving window to stabilize rapid fluctuations in the raw landmark data and ensure clean, reliable signals before further analysis.

• I added a head-pose estimation module that computes a Rotation Matrix derived from MediaPipe’s 3D facial landmarks. Using OpenCV’s Perspective-n-Point (PnP) solver, I generated the rotation matrix R and extracted Pitch and Yaw angles for real-time analysis of gaze direction. This stage established the foundation for future expansion toward full 3D orientation tracking.

• I developed an attention-classification mechanism based on head angles and gaze signals, where I defined dynamic thresholds distinguishing between three attention levels: Focused, Normal, and Distracted. The classifier uses the Gaze Aversion Rate (GA Rate), the Eye-Aspect Ratio (EAR) for blink detection, and off-screen time tracking to produce an overall attention summary at the end of video processing.

• I created an automated results-reporting layer in Python that stores per-frame states, aggregate statistics, and temporal patterns of attention. I integrated visualization capabilities using Matplotlib to generate graphs showing changes in attention over time, and designed the structure so it can later connect to an external dashboard or a CI/CD pipeline.