Dan Stepanov
Longevity Biotech Fellowship at On Deck
Santa Monica, California, United States
Summary
🤩
Rockstar🎓
Top SchoolDan Stepanov is a product-focused software engineer and founder with 12 years of experience building consumer and enterprise mobile and web products from MVP to production. As Co-Founder & CTO at ProPhone and former founding engineer at Marble, he led large React Native and TypeScript rewrites, introduced CI/CD and E2E testing pipelines, and dramatically increased team velocity and deployability. He’s an active open-source contributor—helping upgrade and maintain Expo Snack to newer SDKs and Node versions—and maintains projects around NativeWind and React Native tooling. Based in Santa Monica, he pairs a chemical engineering degree with deep product instincts honed across startups, YC-backed ventures, and fellowship work in longevity biotech, bringing a rare blend of executional rigor and cross-domain curiosity.
12 years of coding experience
7 years of employment as a software developer
Y CombinatorBachelor of Science - BS, Chemical Engineering, Bachelor of Science - BS, Chemical Engineering at Penn State University
Russian
Stackoverflow
11reputation
241reached
0answers
1question
Github Skills (12)
expo10
typescript10
nodejs10
javascript10
typescripts10
react10
typescript-types10
npm9
git9
css7
html7
twilio6
Programming languages (14)
Github contributions (5)
expo/snack
Apr 2022 - May 2022
Expo Snack lets you run Expo in the browser.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:17 reviews, 8 commits, 11 PRs in 1 month
Contributions summary:Dan contributed to the development of Expo Snack, making upgrades to dependencies such as Node and React Native. They addressed build and test issues and upgraded the project to Expo SDK 44 and then to SDK 45. The user updated the website component to use node 16 and implemented URL updates based on platform selection. These changes cover both the frontend (website) and the backend (Snackager and SDK updates).
browserreact-nativeuser-guidesnackexpo-snack
roninoss/create-expo-stack
Jun 2023 - Mar 2025
CLI tool to initialize a React Native application with Expo. Provides options to include Typescript, file-based routing via Expo Router, configuration based routing via pure React Navigation, styling via Nativewind, Restyle, Unistyles, StyleSheets, or Tamagui, and/or backend as a service such as Firebase and Supabase.
Contributions:98 releases, 188 reviews, 427 PRs in 1 year 9 months
boilerplatecliexpo-cliexpo-routerexpo-template
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