Passionate about working with data at scale. With a solid foundation in data structures, algorithms, and computer architecture, I bring expertise in a wide range of technologies including Python, PySpark, SQL, Polars, Spring Boot, NodeJS, and RESTful APIs.I’m always seeking opportunities to expand my technological expertise and tackle challenging projects. Feel free to reach out—let’s connect and collaborate! 🚀
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Data ScientistVisaSan Jose, Ca, Us -
Data EngineerSession Ai Jun 2021 - PresentSan Jose, California, United States- Developed and trained SessionAi’s flagship machine learning models for predicting anonymous visitor actions for major clients (e.g., Verizon, BestBuy), serving as a core revenue driver and generating millions in revenue.- Collaborated with Data Scientists to build a machine learning model that chooses personalized offers based on visitor behavior, achieving a 20% increase in net revenue over random allocation.- Co-developed a patent pending Friction Detection model identifying customer challenges in the online shopping journey for a $1M+ contract.- Processed and transformed billions of data rows from key clients using Python, PySpark, and Polars, creating actionable datasets for machine learning experiments, analysis, and model monitoring.- Developed FastAPI endpoints to integrate and deploy custom machine learning models- Utilized MLflow for lifecycle management, ensuring continuous monitoring and automated updates of ML models.- Utilized Docker and Kubernetes to configure GPU-optimized servers for specialized model training, supporting scalable model training for production.- Established unit testing frameworks for data pipelines using PyTest, TensorFlow Data Validation, and Great Expectations, ensuring high data quality and pipeline resilience. -
Quality Engineer8X8 Jun 2020 - Sep 2020United States- Generated and managed test cases for the 8x8 Virtual Desktop application- Analyzed, verified, and logged discovered bugs on Jira and Testrail - Helped build and run automated tests for a SaaS product in development in Jenkins- Collaborated with other teams in an Agile working environment with Test Driven Development -
Web Dev InternZoom Video Communications May 2019 - Aug 2019San Jose- Developed a tool for stress testing Web servers and several URIs and APIs- Utilized SpringBoot and Thymeleaf as a backend and frontend respectively - Wrote tests for RESTful APIs using both OAuth and JWT for Sessions and authentication- Used Elasticsearch and Kibana to store and visualize test results- Analyzed Http payloads and decoded Protobuffers from real user web traffic -
Software InternMoxtra Jun 2017 - Aug 2017San Jose, California- Created a tool using Javascript and HTML to convert translation files into useable files for the Moxtra App (localization)- Actively collaborated with a team to fulfill project requirements- Used NodeJS to create a server used for administering translation files and managing version control- Participated in and lead corporate presentations on our product -
Cosmos - Introduction To Engineering MechanicsUniversity Of California, Davis Jul 2016 - Aug 2016Davis, California- Learned about aerospace engineering principles- Experience with the MATLAB coding language- Final project consisted of teaching the class on the Mass-Spring-Damper system. -
StudentId Tech Camps At Stanford Jun 2015 - Jul 2015Stanford, California- Attended both an Introduction to C++ course as well as a Unity and C# course- Created a game where the player inputs commands to beat a boss in C++- Created an iOS game using Unity and C#, where the player controls a box attempting to avoid moving obstacles
Tom Liu Education Details
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Computer Science
Frequently Asked Questions about Tom Liu
What company does Tom Liu work for?
Tom Liu works for Visa
What is Tom Liu's role at the current company?
Tom Liu's current role is Data Scientist.
What schools did Tom Liu attend?
Tom Liu attended University Of California, Berkeley.
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