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Yuan Xu

Junior Machine Learning Engineer specializing in multimodal AI and audio deepfakes detection

Scam AICarnegie Mellon UniversityBerkeley, California3 Years ExperienceJunior LevelWorks On-Site

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About

Internship experience building production-oriented AI systems, including a real-time voice scam/spoof detector (RawNet + AASIST) hardened for noisy audio via aggressive augmentation and Zoom-based noise simulation, evaluated with EER on clean and wild datasets. Also built an LLM-driven UI automation agent using Playwright for apps like Linear/Notion with modular tool design, unit tests, and replayable scripted scenarios, and has AWS Step Functions experience orchestrating Lambda/Cognito workflows.

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Key Strengths

  • Built and benchmarked a real-time voice scam/spoof detection system using RawNet + AASIST
  • Improved robustness to noisy real-world audio via heavy data augmentation and Zoom noise simulation
  • Uses rigorous evaluation (clean vs wild datasets; EER) to measure model robustness
  • Production workflow reliability using AWS Step Functions with retries/timeouts for Lambda-based systems
  • Designs AI agents as modular tools with unit tests plus scripted task suites and log replay
  • Iterative model/prompt strategy driven by error analysis (moved from single-LLM to two-stage planning; enforced short plans with explicit UI attributes)
  • Effectively collaborates with non-technical stakeholders by reframing ML metrics into operational tradeoffs; reduced false positives and manual inspections on a production line

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Experience

Machine Learning EngineerScam AI · May 2025 – Aug 2025internship
Full-time InternshipASM Pacific Technology | Vision Group · Aug 2022 – May 2023internship
RESEARCH ASSISTANTCity University of Hong Kong · Jun 2022 – Jun 2024part-time

Education

Carnegie Mellon Universitymaster, Artificial Intelligence Engineering-IS (2025)
City University of Hong Kongbachelor, Computer Science (2024)

Awards

  • Dean's List (2021-2023) - City University of Hong Kong
  • HK TECH Tiger Talent Award (top 10% of students at the department) - City University of Hong Kong

Skills

PythonCC++JavaLinuxSQLHTMLCSSJavaScriptTensorFlowPyTorchOpenCVApache SparkNext.jsJenkins

Languages

EnglishMandarin

Certifications

University College London

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Yuan XuJunior Machine Learning Engineer specializing in multimodal AI and audio deepfakes detection