Mingjing W.-Machine Learning Engineer | Inference Systems & Recommendation
Check rate
Experience
Software Engineer, Inference
Confidential AI Company
- Built a production inference engine from the ground up and implemented high-performance GEMM, sparse-attention, and fused kernels, improving inference performance by up to 200%.
- Enabled and optimized inference for 10+ newly released model families, including DeepSeek, Kimi, and MiniMax, improving production readiness across latency, throughput, and compute efficiency.
Machine Learning Engineer Intern
Alibaba Cloud
- Built an unsupervised NLP pipeline for 30,000 customer-service tickets using StructBERT, Siamese UniNLU, regex labeling, and Neo4j; achieved 97% accuracy and increased the automated resolution rate by 21% after deployment on Alibaba EAS.
- Developed a Prophet-based replenishment system and dynamic inventory model for cloud assemble-to-order operations; reached 98% adoption and projected RMB 100M in annualized inventory cost savings.
Search Ads Machine Learning Engineer Intern
JD Retail (JD.com)
- Built a daily BERT-to-FastText knowledge-distillation pipeline with EM-based transfer and traffic-aware pruning for query category prediction; increased impressions 1.9% and content consumption 2.2%.
- Redesigned a 6,000+ category multi-label intent classifier using Circle Loss and shared-encoder dual towers with cross/self-attention; lifted impressions 2.0% and content consumption 1.7%.
- Optimized heterogeneous-graph retrieval with MetaPath2Vec, HAN, and layer-wise training for billion-scale graphs; increased content consumption 3.1% in 1.5-2 week online A/B tests serving 30M DAU.
Recommendation Systems Engineer Intern
Kuaishou
- Enhanced LightGBM multi-objective ranking with personalized recall, PageRank, ADASYN, and Bayesian smoothing; improved offline AUC 6.9% on high-frequency traffic and 3.0% overall.
- Deployed DeepFFM/MMoE models in C++ with BPR loss and attention pooling, improving gAUC 9% relative; applied doubly robust estimation with DID and propensity-score matching to increase retention 0.7% relative.
Industry experience
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Experienced in Information Technology, Retail, and Media and Entertainment.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Customer Service, Logistics, Operations, and Supply Chain Management.
Summary
I build machine learning systems that improve both model quality and production efficiency, with hands-on work across inference, recommendation, search ads, and applied NLP. I built a production inference engine from the ground up and implemented high-performance GEMM, sparse-attention, and fused kernels, improving inference performance by up to 200%, while enabling 10+ newly released model families for production.
I also develop practical ML solutions that move business metrics. My work has improved latency, throughput, impressions, content consumption, retention, and automated resolution rates through recommendation models, graph retrieval, knowledge distillation, and NLP pipelines. My background in analytics and mathematics helps me turn complex models into reliable systems that perform well at scale.
Skills
- Programming: Python, C++, Java
- Ml Systems: Distributed Inference, Kernel Optimization, Model Serving, Profiling/Benchmarking
- Ml: Retrieval, Ranking, Personalization, Knowledge Distillation, A/B Testing
Languages
Education
Nanyang Technological University
M.S. · Analytics · Singapore, Singapore · 4.3/5.0
Central South University
B.S. · Mathematics and Applied Mathematics · Chang Sha Shi, China · 3.7/4.0
Statistics
Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Mingjing is based in Singapore, Singapore and can operate in on-site, hybrid, and remote work models.
Mingjing speaks the following languages: Chinese (Native), English (Advanced).
Mingjing has at least 5 years of experience. During this time, Mingjing has worked in at least 4 different roles and for 4 different companies. The average length of individual experience is 1 year and 2 months. Note that Mingjing may not have shared all experience and actually has more experience.
Based on recent experience, Mingjing would be well-suited for roles such as: Software Engineer, Inference, Machine Learning Engineer Intern, Search Ads Machine Learning Engineer Intern.
Mingjing's most recent position is Software Engineer, Inference at Confidential AI Company.
In recent years, Mingjing has worked for Confidential AI Company, Alibaba Cloud, JD Retail (JD.com), and Kuaishou.
Mingjing is most experienced in industries like Information Technology, Media and Entertainment, and Retail.
Mingjing is most experienced in business areas like Information Technology, Product Development, and Research and Development. Mingjing also has some experience in Customer Service, Logistics, and Operations.
Mingjing holds a Master in Analytics from Nanyang Technological University and a Bachelor in Mathematics and Applied Mathematics from Central South University.
Mingjing is immediately available part-time for suitable projects.
Daily rate distribution
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Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 18 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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