# Sam(Zhaoxing) Lyu

> Affirm Software Engineer II | UCSD MSCS

Location: New York, New York, United States
Profile: https://flows.cv/samzhaoxing

Software Engineer II @ Affirm

## Work Experience
### Software Engineer II @ Affirm
Jan 2025 – Present
• Built and scaled data pipelines using Python, improving data availability for cross-functional analytics and reporting
• Partnered with product and finance teams to implement ACH down payment flows, reducing transaction costs by 3% per transaction
• Reduced pipeline runtime from 8 hrs to 15 mins by migrating workloads from live DB to AWS data
lake, eliminating prior failures and significantly improving system performance
• Leveraged AI-assisted development tools (Claude, Cursor) to improve engineering productivity

### Software Engineer @ SoFi
Jan 2023 – Jan 2025 | Helena, MT
• Maintained and enhanced backend services for the Personal Loan platform using Kotlin, Java, and Spring Boot
• Optimized lending flow logic, driving a 15% increase in user conversions and generating $15M in additional annual revenue
• Led multiple technical initiatives, including API and gRPC migrations, improving system stability and scalability
• Implemented robust monitoring and alerting using Datadog and Kibana, reducing deployment issues and improving incident detection

### Software Engineer @ Brain Corp
Jan 2023 – Jan 2023 | San Diego, California, United States
• Executed ETL operations on 5000+ rows robot data from GCP BigQuery using Python
• Applied ML dimension-reduction techniques like PCA, UMAP, and t-SNE for visualizing error clusters and diagnosing robotic autonomy performance abnormalities
• Optimized SQL queries to isolate the abnormal robots routes influencing data distribution and constructed efficient Python APIs, resulting in a 10% improvement in web app load time
• Implemented Airflow and Spark workflows to generate daily error shift images and distributed them to cross-functional teams for analysis
• Collaborated with a 10-member team, utilizing Git and Jira for streamlined task management

### Software Engineer @ Packed
Jan 2022 – Jan 2022 | San Diego, California, United States
• Delivered a responsive e-commerce web app with sub-second load times, integrating CRUD functionality in an Agile development environment using React.js and Firebase
• Developed 20+ reusable and maintainable components, reducing future development time by 30%
• Utilized React.js Hooks and Context API to efficiently manage state across components and pages
• Designed and implemented scalable NoSQL database solutions for efficient data storage

### Summer Research Fellow @ Xi'an Jiaotong-Liverpool University
Jan 2019 – Jan 2019 | Suzhou, Jiangsu, China
Summer Undergraduate Research Foundation (SURF)
• Performed clinical text extraction and classification using a natural language processing approach
• Designed the algorithm part of the projects by achieving BiLSTM for accuracy with over 70%

### Student Teaching Assistant @ Xi'an Jiaotong-Liverpool University
Jan 2019 – Jan 2019 | Suzhou, Jiangsu, China
• Taught Algorithm knowledge to over 50 students and solved their problems
• Won an excellent student lecturer award as a result of over 40 student votes for class-based individual
and group communication skills

### President of Buddy Programme @ Xi'an Jiaotong-Liverpool University
Jan 2018 – Jan 2019 | Suzhou, Jiangsu, China
• Planed and managed daily routine of Buddy Programme, an important program held by school.
• Organized and planned for activities in the university to let splendid senior students communicate and help more new students including overseas students accustom themselves to college lives.
• The average number of participants in activities is over 1000, for example, campus tour, one of the
activities I organized attracted over 4000 students.


## Education
### Master of Science - MS in Computer Science
UC San Diego

### Bachelor of Science - BS in Information and Computing Science
University of Liverpool

### Bachelor of Science - BS in Information and Computing Science
Xi'an Jiaotong-Liverpool University

### High School Diploma
Qingdao No. 2 High School


## Contact & Social
- LinkedIn: https://linkedin.com/in/zhaoxing-lyu

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Source: https://flows.cv/samzhaoxing
JSON Resume: https://flows.cv/samzhaoxing/resume.json
Last updated: 2026-04-05