Timothy Lu Email & Phone Number

Seattle Area, Washington, US

• Owned, designed and built Spark compatible SDK in R. Helped internal stakeholders and customers (datascientists, analysts, and clinical informaticists) migrate from JupyterHub (base R and Python) to Azure.
• Built various SDK enhancements centered around stakeholder/user feedback, bug fixes, and Spark optimization.
• Owned feature extraction service for COVID dashboards. Optimized Pyspark queries to reduce Spark operations by50%. Created custom features to handle more complex logic. Migrated service through multiple schema changes.
• Drove initiative to migrate feature extraction service into Azure Synpase notebooks. Managed stakeholdercommunication and expectations, managed cross-team work and personally handled all of the associatedengineering.

Bellevue, WA, US

• As a member of the data science team, I use statistical methods and machine learning to uncover insights about our product and personalize the experience of users.
• Improved personalization by developing employer specific recommenders to A/B test against book of business Light FM model
• Engineered a faster way to conduct permutation tests to determine statistically significant relationships between Limeade activities and changes in user well-being
• Created richer features for ML by using word embeddings
• Modeled the propensity for a user to do important actions in the Limeade app using boosted decision trees and logistic regression

Bellevue, WA, US

• Created an easier tool for feature retrieval by developing Databricks/Spark ETL for a long format userfeature table
• Conducted Exploratory data analysis on Salesforce objects using Clustering and TFIDF
• Built Tableau dashboard with demographic filtering on customer survey/response data
• Developed and managed Redshift ETL for dashboard reporting table

Durham, NC, US

• Engineered scripts to report discrepancies in data.
• Applied statistical methods to hasten PGA tournament QA process by adjusting for constraints and statistical noise in shot time data.
• Authored and integrated tests for NASCAR Team Analytics API.

Hsinchu, Hsinchu, TW

• Constructed python library to multiply 3D Computer Aided Design models for numerical analysis.
• Constructed 3D shapes using CAD software.
• Basic web development (PHP, Bootstrap, X3D).
• Connected, collaborated and communicated with team-members from diverse backgrounds and across languages.

Portland, OR, US

• Ran tests on an operational transconductance amplifier (OTA) circuit through SPICE simulation.
• Created presentation of temperature tests on a simulated OTA circuit

Beaverton, OR, US

• Owned and managed Buildbot build server automate unit tests.
• Wrote documentation for BuildBot setup in Windows and Ubuntu.
• Created Python plugin to streamline XML unit test data.
• Developed Linux Shell scripts to allow Buildbot to run tests.