Jimmy Jin

About

I'm a PhD in statistics experienced in all aspects of data science but with a particular expertise in experimentation. I most enjoy going from 0 to 80 and getting my hands dirty: I love working with production code and moonlighting as a data engineer. Big fan of the t-test, SQL and Spark.

Experience

LaunchDarkly | Staff Data Scientist

Mar 2025 - Present

Leading statistical architecture and methodology for the experimentation platform
Led the development of multiple comparison corrections and sequential testing to the platform

Mercury | Data Scientist

Sep 2024 - Feb 2025

Worked on Dashboard team within Growth org, setting goals and metrics
Performed product analytics to drive growth initiatives and improve user engagement

Stripe | Data Scientist

Jul 2019 - Sep 2024

Founding data scientist on card optimization, quantifying billions in incremental revenue through experiments
Built Stripe's first contextual bandit algorithm for Stripe Dashboard, driving 20% uplift in click-through rates
Developed core user funnels, metrics, and dashboards for Link product
Created foundation data pipelines for quantifying FX exposure
Blended modeling/analysis, data engineering, and production code across Link, Dashboard, FX, and payments

Optimizely | Statistician

Nov 2017 - May 2019

Led all statistics operations and served as acting Product Manager for Analytics
Created Epoch Stats Engine, novel stratification-based estimator eliminating Simpson's Paradox
Authored company's first Statistics Roadmap for short- and long-term R&D strategy
Translated advanced statistical concepts for customers in pre- and post-sales engagements

About

Experience

Education

Technical Skills