Joyce Ma

San Francisco, California, United States

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Summary

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Rockstar

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Top School

Joyce Ma is a software engineer in San Francisco with seven years’ experience building high-performance web apps, specializing in real-time video and audio communication. At Twilio she was a core contributor to the widely used twilio-video.js SDK—improving performance by 30%, reducing downtime and support requests, and adding features like Chrome tab sharing and TypeScript definitions used by 100,000+ developers. She combines front-end expertise (JavaScript/TypeScript, React, CSS) with back-end skills (Node.js, AWS, SQL, Docker) and strong testing practices (Jest, Cypress, Mocha/Chai). Joyce has a track record of optimizing systems for scale—benchmarked databases, horizontally scaled services to 1,000 RPS, and cut database latency by 95% on a reservations module. A former Hack Reactor resident and mentor, she enjoys translating deep technical improvements into better developer and user experiences.

7 years of coding experience

5 years of employment as a software developer

Bachelor of Science - BS, Biology, Physiology, Bachelor of Science - BS, Biology, Physiology at San Francisco State University

Advanced Software Engineering Immersive, Advanced Software Engineering Immersive at Hack Reactor

cantonese, mandarin

Github Skills (17)

unit-testing10

javascript10

testing10

css10

typescript10

360-video10

typescript-types10

html10

test-integration10

typescripts10

webrtc10

test-unit10

integration-testing10

video-chat9

quicklaunch7

Programming languages (5)

TypeScriptJavaScriptVueHTMLTSQL

Github contributions (5)

twilio/video-quickstart-js

Jan 2020 - Feb 2022

A quickstart and code samples for Twilio Video JavaScript SDK. https://www.twilio.com/docs/video

Role in this project:

Front-end Developer

Contributions:9 reviews, 66 commits, 40 PRs in 2 years

Contributions summary:Joyce primarily contributed to the development of the frontend user interface for the Twilio Video JavaScript Quickstart project. Their commits focused on building new examples, specifically for features like enabling and disabling tracks within a video chat application. The user implemented HTML, CSS and JavaScript to display and control local and remote media streams, including muting/unmuting audio and video. They also made modifications to existing HTML and CSS files.

videojsvideochattwiliojavascriptwebrtc-video

twilio/twilio-video.js

Mar 2020 - Jan 2023

Twilio’s Programmable Video JavaScript SDK

Role in this project:

Full-stack Developer

Contributions:8 releases, 143 reviews, 148 commits in 2 years 11 months

Contributions summary:Joyce primarily focused on enhancing the Twilio Programmable Video JavaScript SDK. They made significant contributions to features like Chrome tab sharing and network monitoring by implementing new logic and tests. Furthermore, the user worked on establishing TypeScript definitions for the SDK, defining key classes like Track, LocalAudioTrack, and RemoteAudioTrack. These efforts included fixing event listener cleanup issues, adding various events, and refining the code for better performance and maintainability.

twiliojavascriptwebrtcsdkprogrammable

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