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Hi, I'm Ray Zhang, a Senior Machine Learning Engineer and ML Tech Lead with 10+ years of experience building production AI, computer vision, search relevance, and safety systems across Meta, Walmart, robotics, biotech, and academic research. I specialize in end-to-end ML pipelines, MLOps, LLM/RAG systems, multi-modal moderation, ranking, and scalable cloud deployment across AWS and GCP. I have a proven track record of improving model performance, automation, search engagement, and operational efficiency in high-impact production environments.…Hi, I'm Ray Zhang, a Senior Machine Learning Engineer and ML Tech Lead with 10+ years of experience building production AI, computer vision, search relevance, and safety systems across Meta, Walmart, robotics, biotech, and academic research. I specialize in end-to-end ML pipelines, MLOps, LLM/RAG systems, multi-modal moderation, ranking, and scalable cloud deployment across AWS and GCP. I have a proven track record of improving model performance, automation, search engagement, and operational efficiency in high-impact production environments.

Ray Zhang

AI Engineer, Data Scientist, Full Stack Developer, +2

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Hi, I'm Ray Zhang, a Senior Machine Learning Engineer and ML Tech Lead with 10+ years of experience building production AI, computer vision, search relevance, and safety systems across Meta, Walmart, robotics, biotech, and academic research. I specialize in end-to-end ML pipelines, MLOps, LLM/RAG systems, multi-modal moderation, ranking, and scalable cloud deployment across AWS and GCP. I have a proven track record of improving model performance, automation, search engagement, and operational efficiency in high-impact production environments.…Hi, I'm Ray Zhang, a Senior Machine Learning Engineer and ML Tech Lead with 10+ years of experience building production AI, computer vision, search relevance, and safety systems across Meta, Walmart, robotics, biotech, and academic research. I specialize in end-to-end ML pipelines, MLOps, LLM/RAG systems, multi-modal moderation, ranking, and scalable cloud deployment across AWS and GCP. I have a proven track record of improving model performance, automation, search engagement, and operational efficiency in high-impact production environments.

Available to hire

Hi, I’m Ray Zhang, a Senior Machine Learning Engineer and ML Tech Lead with 10+ years of experience building production AI, computer vision, search relevance, and safety systems across Meta, Walmart, robotics, biotech, and academic research. I specialize in end-to-end ML pipelines, MLOps, LLM/RAG systems, multi-modal moderation, ranking, and scalable cloud deployment across AWS and GCP. I have a proven track record of improving model performance, automation, search engagement, and operational efficiency in high-impact production environments.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Machine Learning Engineer at Meta

June 1, 2024 - Present

Led development of Instagram Safety & Integrity ML systems to detect and mitigate harmful content across text and images. Designed and deployed end-to-end ML pipelines on AWS (S3, EKS, Lambda) and GCP (Vertex AI), and built end-to-end MLOps pipelines using AWS SageMaker, MLflow, and Docker with observability tools (OpenSearch, Athena, CloudWatch). Architected RAG-based moderation with OpenSearch/Pinecone, integrated OpenAI and Anthropic APIs for moderation assistance, and implemented multi-step LangChain workflows. Built scalable FastAPI inference services and multimodal pipelines (OpenCV, Tesseract, PyTorch) for real-time content scoring, with evaluation/monitoring (A/B testing, drift detection, alerts). Reduced manual moderation by ~30% via workflow automation and system optimization.

Senior ML Data Scientist, Tech Lead at Walmart Global Tech

January 1, 2024 - June 1, 2024

Led ML systems for search relevance, ranking, and query understanding. Built scalable training, experimentation, and monitoring pipelines with Python, SQL, Spark, and Airflow. Drove cross-functional search strategy with product, engineering, and platform teams. Increased search engagement by 8.4% through semantic retrieval and intent-aware ranking. Mentored senior DS/ML scientists and set technical direction.

Senior Computer Vision Scientist at eBots

November 1, 2022 - January 1, 2024

Led development of computer vision and ML solutions for perception, detection, and image-based automation in robotics systems.

Image Analysis Scientist at Bio-Techne

January 1, 2022 - November 1, 2022

Developed image analysis pipelines and quantitative algorithms for biological imaging data to support research and product development.

Staff Research Associate IV at NCIRE, UCSF

August 1, 2021 - December 31, 2021

Led advanced data analysis and imaging research initiatives, driving experimental studies and technical execution across interdisciplinary projects.

Staff Research Associate II at NCIRE, UCSF

January 1, 2016 - August 1, 2021

Conducted imaging and data-driven research, building analytical workflows and supporting scientific studies in a collaborative academic environment.