David Hsieh, iOS Software Engineer at Jefit Inc.

David Hsieh

iOS Software Engineer at Jefit Inc. | San Jose, California, United States

Profile last verified July 2026
Technology, Information and Internet Verified Profile San Jose, California, United States UC Berkeley
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David Hsieh Socials
David Hsieh Work Experience

iOS Software Engineer at Jefit Inc. in August 2022 - Present

Professional development at Career Break in June 2021 - August 2021

David Hsieh Education

UC Berkeley, August 2020 to May 2022

Udacity, June 2021 to January 2022

Princeton University, August 2017 to December 2018

David Hsieh Skills
iOS Development Mobile Application Development Swift (Programming Language) Xcode iOS UIKit Git REST APIs Application Development Mobile Applications GitHub Core Data Auto Layout Networking MapKit GCD Foundation Object-Oriented Programming (OOP) JSON swift Python (Programming Language) NumPy Pandas (Software) Scikit-Learn Seaborn Matplotlib Java
About David Hsieh’s Current Company
Jefit Inc.

Jefit is an award winning social workout tracking platform that keeps gym goers stay motivated by tracking and analyzing their fitness goals. Jefit has been downloaded over 9 million times in over 50 countries across the iOS and Android apps and grown to be one of the top health and fitness apps in the app store. To date Jefit has been fully bootstrapped and profitable, which has allowed us to create an app experience featured by Google Play, USA Today, Muscle and Fitness, and many others. What sets us apart from other fitness apps is our focus on leveraging social features and data science to make our users'​ workouts fun and to motivate them to be consistent at the gym. Our vision is to become the #1 Health and Fitness app that not only makes fitness accessible, but is also home to a community that motivates and pushes each other to reach their fitness goals.

Discover more about Jefit Inc.
David Hsieh’s Colleagues
Eric Tjon

Eric Tjon

San Francisco Bay Area

Software Engineer

Software Engineer at Jefit Inc.
(October 2023 – Present)

Jingyao Zuo

Jingyao Zuo

Los Angeles Metropolitan Area

UIUX & Visual Designer

Web Developer at 35 Creatives
(August 2026 – August 2026)

Daniel Ramirez

Daniel Ramirez

San Jose, California, United States

iOS Developer

iOS Developer at Jefit Inc.
(September 2023 – Present)

Jerry Durkin

Jerry Durkin

San Jose, California, United States

iOS @ Jefit

iOS Software Engineer at Jefit Inc.
(March 2023 – Present)

QZ

Qiwen Zheng

New York, New York, United States

Growth Marketing Analytics

Growth Marketing Specialist at Jefit Inc.
(July 2023 – Present)

AL

Alexander Llanas

San Francisco Bay Area

Software Engineer

Software Engineer at Jefit Inc.
(July 2022 – Present)

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Frequently asked questions about David Hsieh

What is David Hsieh email address?

Email David Hsieh at [email protected]. This email is the most updated David Hsieh's email found in 2026.

What is David Hsieh phone number?

David Hsieh phone number is 4089731824.

How to contact David Hsieh?

To contact David Hsieh send an email to [email protected]. If you want to call David Hsieh try calling on 4089731824.

What company does David Hsieh work for?

David Hsieh works for Jefit Inc..

What is David Hsieh's role at Jefit Inc.?

David Hsieh is iOS Software Engineer

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