Machine Learning Engineer

Rate, USD
Not specified
Work schedule
Full Time,
Language skills
English
Available for Hire
Yes
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About me

I am a machine learning researcher and engineer with a strong background in computer science, electrical engineering, and large-scale recommendation systems. My work combines academic research with industry experience, and I focus on building practical ML systems that solve real-world problems.

I am currently pursuing a Ph.D. in Computer Science and Electrical Engineering with a machine learning focus at the University of Maryland, Baltimore County. My research spans dictionary learning, multimodal fusion, graph neural networks, retrieval-augmented generation, and optimization methods for intelligent systems.

I have also gained industry experience at Meta Platforms, where I worked on large-scale creator recommendation and social graph representation learning. In that role, I built machine learning pipelines, trained embeddings on massive graph data, wrote high-quality SQL for very large datasets, and contributed to offline and online A/B testing.

My recent independent research includes agentic multi-hop RAG systems, multimodal product retrieval, and attention-based sequential models for e-commerce CTR ranking. These projects strengthened my skills in retrieval, ranking, deep learning, feature engineering, and evaluation for recommendation and search applications.

Earlier in my graduate research, I worked on blockchain systems with confidentiality and smart contract support, improving throughput significantly through multithreading. I have also contributed to several publications in biomedical imaging, signal processing, and distributed systems.

Overall, I am interested in roles in machine learning, recommendation systems, graph representation learning, and related applied research areas. I enjoy combining theory, implementation, and experimentation to build scalable and effective intelligent systems.




Education

Sep 2018 - Expected Dec 2026 Ph.D. in Computer Science and Electrical Engineering, Machine Learning @ University of Maryland, Baltimore County (UMBC)

Doctoral studies focused on machine learning, optimization, graph learning, and multimodal data analysis.

Sep 2014 - Jul 2018 B.S. in Computer Science @ Sichuan University

Undergraduate degree in computer science.


Experience

Mar 2026 - Apr 2026 Agentic and Multi-Hop Retrieval-Augmented Generation (RAG) System for Wiki Q&A @ Independent Research Project

Built an end-to-end RAG pipeline covering retrieval, reranking, and LLM-based answer generation. Implemented multiple retrieval strategies, multi-hop retrieval, an agentic loop for decomposing questions, and an NLI-based verifier.

Feb 2026 - Mar 2026 Multimodal Product Retrieval System for Large-Scale Recommendation @ Independent Research Project

Implemented a two-tower retrieval pipeline for large-scale recommendation using text, image, categorical, and numerical signals. Addressed positive-unlabeled learning with negative sampling, false negative filtering, and curriculum learning.

Jan 2026 - Feb 2026 Attention-Based Sequential Models for E-Commerce CTR Ranking @ Independent Research Project

Implemented DIN, DIEN, and BST models for click-through rate ranking using user behavior history. Improved ranking performance and reduced training and inference time.

Apr 2025 - Present Graduate Research Assistant @ Signal Processing and Smart System Lab, UMBC

Worked on auto parameter tuning for constrained dictionary learning and non-negative matrix factorization. Applied Bayesian optimization, implicit function theorem-based tuning, and dynamic system differentiation methods.

May 2025 - Sep 2025 Graduate Research Assistant @ Meta Platforms, Inc. and Signal Processing and Smart System Lab, UMBC

Developed an inductive GraphSAGE model for user representation and creator recommendation. Engineered customized message passing and fine-tuned the model for incremental graph updates.

May 2025 - Aug 2025 Machine Learning Engineer Intern @ Meta Platforms, Inc.

Built machine learning pipelines for large-scale creator network modeling, trained embeddings on massive social graph data, wrote SQL for very large datasets, and supported offline and online A/B testing.

Jul 2020 - Present Graduate Research Assistant @ Signal Processing and Smart System Lab, UMBC

Conducted research on supervised dictionary learning, sparse signal representation, multimodal fusion, and optimization. Designed and implemented algorithms and experiments for feature learning and data fusion.

Sep 2018 - Jul 2020 Graduate Research Assistant @ Distributed System and Security Lab, UMBC

Researched blockchain systems with confidentiality and smart contract support. Implemented a blockchain platform and improved throughput through multithreaded handling of network I/O requests.


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