James Dellinger

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James Dellinger

James Dellinger

Mountain View, CA First.LastName@gmail.com Kaggle Github

Objective

Make decision trees make use of categorical variables.

Contact

Experience

Decision Trees Engineer

Dec 2019–Present
Mountain View, CA

Building a random forests library with the best techniques for categorical splitting: classic CART, PCA rank encoding. Writing a textbook on performant implementations of decision tree algorithms.


Commodities Trader

Jul 2022–Present
Mountain View, CA

Trading futures markets using a proprietary strategy based on George Douglass Taylor’s principles. Published a book explaining his concepts.


Machine Learning Study

Jun 2017–Dec 2019
Mountain View, CA

Taught myself tabular data, computer vision, and language models. Solo bronze medals in two Kaggle competitions.


Peel Technologies

May 2014–Dec 2016
Mountain View, CA

Product Manager

Sep 2015–Dec 2016

Built an experimental TV voice control interface with a crack engineering team. Founders demoed in 1:1 meetings with CEOs of national retailers.

Associate Product Manager

Feb 2015–Sep 2015

Doubled the app’s setup funnel completion rate with a designer and engineer. Shipped user-tested UX improvements and reduced backend latency.

Product Evangelist

Aug 2014–Feb 2015

Pitched Peel’s TV guide ad remote app and monetization plans to prospective partners and investors. Prototyped new features and ad products.

Consultant

May 2014–Aug 2014

Helped the CEO with vital projects across business development, marketing, and general admin. Made decks for board meetings and founders’ speeches.


Ads Quality Rater

Google c/o WorkforceLogic (Mountain View, CA)
Dec 2012–Dec 2013

Sanity checked ad placement algorithms.


Instructor

Sanjie Foreign Language School (Beijing, China)
Sep 2008–Aug 2011

Taught English, high school math, and SAT prep.


Manager

Cafe Chewhadang (Seoul, Korea)
Apr–Sep 2007

Ran a book cafe near Yonsei University.

Published Work

Education

UC Berkeley

Bachelor of Arts, Economics

Languages

Fluent Japanese (JLPT Level 1, Dec 2006), conversational Korean and Chinese.

Hobbies

Restoring old electronics—Repaired a vintage videogame system during summer 2020.