# Victor Cai

> Software Engineer @ Roblox

Location: San Mateo, California, United States
Profile: https://flows.cv/victorcai

I am interested in software engineering, machine learning, and data science, particularly health and sports data.

## Work Experience
### Software Engineer @ Roblox
Jan 2024 – Present | San Mateo, California, United States

### Wei Lab Computational Biology Research Assistant @ Cornell University
Jan 2022 – Jan 2023 | Ithaca, New York, United States
- Design and develop in C++ a PyTorch extension for a convolutional neural network input layer for sparse genotype data, computing the forward and backward passes with 20-fold reduction in time complexity in large sample sizes.
- Explored time/space-efficient sparse matrix structures and operations to exploit sparsity in large genetic datasets.
- Devised novel algorithms that computes the Genomic Relationship Matrix with up to 200-fold reduction in computational complexity and Linkage Disequilibrium score with up to 20-fold reduction, depending on sample size.
- Developed codebase in C++ for estimating heritability 3x faster than the current leading algorithm.

### Algorithms Teaching Assistant @ Cornell University
Jan 2022 – Jan 2022 | Ithaca, New York, United States
- Led weekly office hours to reinforce students’ understanding of algorithm design and analysis.

### Orientation Leader @ Cornell University
Jan 2020 – Jan 2022 | Ithaca, New York, United States
Provide support and advice to a group of 20-30 freshmen to help them navigate their first weeks at Cornell.

### Python Tutor @ Unknown
Jan 2022 – Jan 2023 | Ithaca, New York, United States
Tutored 5 students in Python.

### Software Engineer Intern @ IBM
Jan 2022 – Jan 2022 | New York City Metropolitan Area
- Developed an A/B Testing platform with Maven and Docker for IBM’s company-wide internal search engine; the platform can start and analyze an experiment to efficiently test search algorithms and ranking models.
- Improved speed tenfold for processing hundreds of GBs of user clickstream data by using Apache Livy to connect to a Hadoop cluster to leverage Apache Spark for parallel data processing.
- Built a command-line interface with Apache CLI and a REST API with SparkJava for the platform.
- Integrated GitHub repo with Travis CI, code coverage and style checks, and JUnit/Mockito tests to ensure high quality code.
- Won first place in IBM’s Be(e) Innovative Challenge by using Blockchain as a core technology to improve supply chain transparency & traceability, bring visibility to sustainability issues and help everyone make informed purchases.
- Increased accuracy of machine learning model for Digital Assistant topics recommender with Tensorflow.

### Software Engineer Intern @ MITRE
Jan 2021 – Jan 2021 | Bedford, Massachusetts, United States
- Developed a new eVTOL (Electric Vertical Take-Off and Landing) trajectory model for future FAA urban air mobility traffic control software that rectified two flaws in the previous model in the turn and landing phases.
- Designed a new operating model for aviation data provision to slash data service expenses by 85% by using cloud services such as AWS Kinesis Data Streams and Firehose with Apache Flink to efficiently split, distribute and process data stream content to multiple AWS S3 storage buckets.
- Learned agile development practices, actively participated in scrum meetings, and completed tickets including building REST API endpoints and web apps with technologies such as Spring Boot and Vue JS.

### Summer Camp Founder and Counselor @ Unknown
Jan 2020 – Jan 2020 | Scarsdale, New York, United States
- Designed a program and developed the curriculum for an educational youth summer camp tailored to students.
- Nurtured the critical thinking involved in building computer programs through engaging Scratch projects, such as animated stories and controller games.
- Fostered interest in STEM through interactive experiments, demonstrations, and hands-on activities.


## Education
### Master of Engineering - MEng in Computer Science
Cornell University

### Bachelor of Arts - BA in Computer Science and Statistics (double major)
Cornell University

### High School Diploma
Brewster High School


## Contact & Social
- LinkedIn: https://linkedin.com/in/victorcai01

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Source: https://flows.cv/victorcai
JSON Resume: https://flows.cv/victorcai/resume.json
Last updated: 2026-03-29