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 Synapse(Spark). Spark in Synapse notebooks offers major time and cost savings both internally and for our customers.• 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 work. Drove costs down by 75%, addressed technical debt by making processes more simple tounderstand and debug, demonstrated what an end-to-end workflow looks like in Truveta Studio with large data andspark operations.

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.