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Hans Walker
Junior Machine Learning Engineer specializing in generative AI and computer vision
Boston, MAMachine Learning Engineer2 years experienceJuniorArtificial IntelligenceAutonomous VehiclesMedia & Entertainment
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About
AI engineer who deployed a production LLM-powered safety system for an education platform, combining rule-based checks, multi-LLM verification, and selective context (prompt+image vs image-only) to prevent explicit prompts/images from getting through. Strong focus on reliability via benchmarking, trace-based failure analysis, and continuous improvement driven by stakeholder feedback and manual review.
Experience
Machine Learning EngineerCuebric
Education
University of Southern California Viterbi College of Engineeringmaster, Computer Engineering (2023)
Boston University College of Engineeringbachelor, Mechanical Engineering (2021)
Key Strengths
- Built and deployed an LLM-powered prompt+image safety filter for an education platform
- Balanced safety vs usability via iterative testing and manual + automated moderation pipelines
- Pragmatic tooling decisions (phased out LangChain when it didn’t add value vs Python/PyTorch)
- Structured evaluation approach: manual testing, benchmarking, failure-trace review, and cross-team QA
- Model optimization mindset: start with SOTA then iterate toward smaller/cheaper models
- Hands-on debugging of VLM failure modes (e.g., attention to image edges)
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