Cassidy Williams
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Cassidy Williams Email & Phone Number

Developer advocate, educator, advisor, software engineer, and memer at GitHub
Location: Chicago, Illinois, United States 34 work roles 2 schools
1 work email found @contenda.co 4 phones found area 630, 575, and 425 LinkedIn matched
✓ Verified Jul 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email · 4 phones

Work email c****@contenda.co
Direct phone (630) ***-****
LinkedIn Profile matched
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Current company
Role
Developer advocate, educator, advisor, software engineer, and memer
Location
Chicago, Illinois, United States
Company size

Who is Cassidy Williams? Overview

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Quick answer

Cassidy Williams is listed as Developer advocate, educator, advisor, software engineer, and memer at GitHub, a with 501 employees, based in Chicago, Illinois, United States. AeroLeads shows a work email signal at contenda.co, phone signal with area code 630, 575, 425, and a matched LinkedIn profile for Cassidy Williams.

Cassidy Williams previously worked as Senior Director of Developer Advocacy at Github and Podcast Host and Contributing Writer at Stack Overflow. Cassidy Williams holds Bachelor Of Science (B.S.), Computer Science from Iowa State University.

Company email context

Email format at GitHub

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{first}@contenda.co
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AeroLeads found 1 current-domain work email signal for Cassidy Williams. Compare company email patterns before reaching out.

Profile bio

About Cassidy Williams

Hi there! I'm Cassidy Williams, and I am a software engineer, dev advocate, startup advisor, and investor!I have a weekly newsletter at cassidoo.co/newsletter, where I have tech news, interview practice, jokes, and more. I was featured in Glamour magazine as one of the 35 Women Under 35 Who Are Changing the Tech Industry, and I starred in the documentary Big Dream (www.bigdreammovement.com), which focuses on women who are breaking barriers and overcoming personal challenges to follow their passion in science, math, computing & engineering. I love public speaking and have done so at meet-ups, hackathons, and events like the Grace Hopper Celebration for Women in Computing, the National Center for Women & IT Summit, SXSW, TEDxDesMoines, the United Nations, and the U.S. Science and Engineering Festival, and hundreds more.When I'm not coding or speaking, I pass the time by playing music and hanging out with my (also techy) sister, Camryn. I want to inspire generations of STEM students to be the best they can be!Take a look at cassidoo.co for more about me!

Listed skills include Javascript, Css, Html, Java, and 46 others.

Current workplace

Cassidy Williams's current company

Company context helps verify the profile and gives searchers a useful next step.

GitHub
Github
Developer advocate, educator, advisor, software engineer, and memer
88 Colin P Kelly Jr St, San Francisco, CA 94107, us
Website
Employees
501
AeroLeads page
34 roles

Cassidy Williams work experience

A career timeline built from the work history available for this profile.

Senior Director Of Developer Advocacy

Current

San Francisco, Ca, Us

Sep 2024 - Present

Podcast Host And Contributing Writer

Current

New York, Ny, Us

I help write the Stack Overflow newsletter, contribute technical blog posts, and am a co-host on the Stack Overflow Podcast.

Jun 2019 - Present

Co-Founder And Chief Product Officer

Current

New York, New York, Us

Helping creators make legal ownership of their content easy!

Feb 2016 - Present

Advisor & Coach

Current

Austin, Us

Helping the Sukha team talk to and reach developers to work better.

Mar 2022 - Present

Advisor

Current

San Francisco, California, Us

Helping Convex with developer experience and advocacy!

Feb 2024 - Present

Advisor

Current

San Francisco, Us

Oct 2022 - Present

Advisor

Decentralized, Us

Helping the developer relations and community teams work with web developers!

Nov 2023 - Nov 2024

Technical Lead

Mountain View, Wy, Us

Contract architecting and implementing a custom Astro, React, and Pixi.js solution for a stealth startup, driving sales for hundreds of early customers.

Jul 2024 - Aug 2024

Chief Technology Officer

Philadelphia, Pennsylvania, Us

Leading engineering and technology efforts on the team, working on various products through startup pivots.Contenda open sourced and shut down our product, Brainstory, in June 2024. It was a blast working on such a fun productvity tool, and it's available now at github.com/brainstory!

Sep 2022 - Jun 2024

Advisor

Philadelphia, Pennsylvania, Us

Advised the team specifically around developer experience, APIs, developer relations tooling, and products for technical content creators.

May 2021 - Sep 2022

Advisor

San Francisco, California, Us

Helping the Netlify team with public-facing developer experience efforts, and technical content creation strategy.

Dec 2021 - May 2024

Director Of Developer Experience

San Francisco, California, Us

Working on improving developer experience on Netlify, particularly for React, Next.js, and Astro developers.

Jun 2021 - Dec 2021

Principal Developer Experience Engineer

San Francisco, California, Us

Improving the experience for React developers on Netlify!

Apr 2020 - Jun 2021

Development Advisory Board Member

Wix

Tel Aviv, Il

Helping shape the future of development and developer tools at Wix alongside Lea Verou, Ben Awad, Shaundai Person, Wes Bos, Jeff Atwood, and Axel Rauschmayer.

Jan 2023 - Jun 2023

Portfolio Partner: Developer Experience

San Francisco, California, Us

Helping OSS Capital portfolio companies have the best developer experiences possible!Also worked with the team on technical implementations, and built out strategies for both internal and external messaging.Unfortunately OSS Capital had to do layoffs in November 2022, which is why I ended up parting with them, but we still maintain a good relationship!

Apr 2022 - Nov 2022

Head Of Developer Experience And Education

San Francisco, Ca, Us

At Remote I helped start the Remote Open Source organization (https://github.com/remoteoss), organized the Devs For Ukraine event (https://www.devsforukraine.io/) where we raised over $100k for Ukraine, and worked as a cross-functional lead for various community and developer-oriented programs across the organization.

Jan 2022 - Sep 2022

Advisor

New York, Us

Helping Polywork become the next great professional network.

Oct 2020 - Dec 2021

Instructor And Senior Engineer

San Francisco, California, Us

We teach React! In this role, I regularly taught React workshops, developed curriculum, and worked on open source.Unfortunately due to the pandemic, React Training had to lay off all staff on March 20th, 2020.

Sep 2019 - Mar 2020

Director Of Outreach

Seattle, Washington, Us

cKeys is a volunteer-run non-profit that develops and organizes educational workshops centered around teaching the basics of electronics hardware, soldering, and firmware integration using hands-on kits and activities.

Jul 2018 - Feb 2020

Senior Software Engineer

At CodePen, I worked on and led a variety of engineering projects:- Site redesigns- Apollo and GraphQL adoption- Converting the site from jQuery/Rails to React- Babel transpiler and processor- Responsive Pen editor- Deleted items in the user Dashboard- Adopting CSS Modules

Aug 2018 - Sep 2019

Head Of Developer Voice Programs

Seattle, Wa, Us

- Led programs for Alexa Skills Kit to gather and use feedback from 3rd party developers- Built Alexa skills with new, unreleased technologies to help refine and demonstrate the platform’s capabilities - Worked with developer evangelism team to create the most popular Twitch show in the organization- L6

Feb 2018 - Aug 2018

Senior Software Engineer, Dev Manager

Seattle, Wa, Us

- Worked on client-facing web/OTT products- Used vanilla JavaScript, React, CSS (with various preprocessors), Java, BrightScript- Managed team of 6 engineers

Nov 2016 - Jan 2018

Software Engineer & Developer Evangelist

Wilmington, Delaware, Us

- Front-end engineering team using React, Backbone, Less, Gulp, Handlebars, and various other technologies- Developer retrospective lead- Build developer evangelism program from the ground up- Team lead for developer evangelism- Manage hackathon and event sponsorships- Speak regularly at hackathons, conferences, and meetups- Build demos and mentor external developers with various technologies and languages- Run hackathons and meetups for the developer community

Aug 2015 - Nov 2016

Director Of Outreach

Culver City, California, Us

Hacker Fund is a 501(c)(3) public charity dedicated to spreading the hackathon hacker culture to kids across the globe! Our mission is to activate, equip, and mobilize technologists around the world to create social change. We offer fiscal sponsorship, educational resources, and capacity-building services through our incubator and community membership program.- Guide decision making when the organization works with hackers and organizers across the globe- Manage messaging to make sure communication is on point with the hacker community- Reach out to partner companies for involvement with the organization- Mentor and speak at various hackathons and events

Feb 2015 - Jan 2016

Software Engineer & Developer Evangelist

New York, Ny, Us

- Worked on the Money Team, the Core Team, and the Web Team- Worked with: React, Backbone, Grunt, Less, Python, Django, Cassandra- Venmo's first developer evangelist- Managed hackathon/events budget- Spoke regularly at various events, conferences, and meetups about tech and women in tech- My work made Venmo's API the #1 payments API in the 2014-2015 hackathon season

Jul 2014 - Aug 2015

Web Developer

Iowa State University Graduate College Of Human Development And Family Studies

Develop website and graphics for the ISU Money Game Jam competition. Help coordinate and run the event in the Spring.

Feb 2014 - May 2014

Student Representative

San Jose, Ca, Us

Teach fellow students about various Adobe products through workshops and one-on-one tutoring.

Jan 2014 - May 2014

Social Media Engagement Coordinator

Ames, Iowa, Us

I blog for Iowa State University at CycloneLife.net to recruit new students and to provide up to date information on the university from the student's perspective.I am also the school mascot.

Mar 2011 - May 2014

Learning Community Peer Mentor

Ames, Iowa, Us

Provide and lead study sessions to underclassmen for Java courses (basic Java and data structures). Plan activities for said students and work with them one-on-one with their homework and projects.

Aug 2012 - May 2013

Software Engineering Intern

Mountain View, California, Us

Working on web, Mac, and iOS applications for QuickBooks Online.Worked on a team to create a game to teach children about finances.Worked on a winning team to create an internal start up company.

May 2013 - Aug 2013

Intern

Redmond, Washington, Us

Developed mobile version of adCenter Mobile to be released to the public in late September 2012. Used MVC3 ASP.NET, along with JavaScript, jQuery Mobile, HTML5, and CSS3.

May 2012 - Aug 2012

Program Manager

Boulder, Colorado, Us

Kicked off Android Development project, planned dates for meetings and deadlines, wrote specifications for project, submitted proposals and specifications to Grace Hopper Celebration for Women in Computing.

Jan 2012 - May 2012

Intern

Needham, Ma, Us

Manual software testing, Python scripting, mockup design.

Oct 2010 - Dec 2011

Intern

Minneapolis, Minnesota, Us

SharePoint web development for an internal team. Used SharePoint Designer, Photoshop, JavaScript, workflows, HTML, and CSS.

May 2011 - Aug 2011
Team & coworkers

Colleagues at GitHub

Other employees you can reach at github.com. View company contacts for 501 employees →

2 education records

Cassidy Williams education

Bachelor Of Science (B.S.), Computer Science

Iowa State University

Minor, Spanish

Universidad De Extremadura
FAQ

Frequently asked questions about Cassidy Williams

Quick answers generated from the profile data available on this page.

What company does Cassidy Williams work for?

Cassidy Williams works for GitHub.

What is Cassidy Williams's role at GitHub?

Cassidy Williams is listed as Developer advocate, educator, advisor, software engineer, and memer at GitHub.

What is Cassidy Williams's email address?

AeroLeads has found 1 work email signal at @contenda.co for Cassidy Williams at GitHub.

What is Cassidy Williams's phone number?

AeroLeads has found 4 phone signal(s) with area code 630, 575, 425 for Cassidy Williams at GitHub.

Where is Cassidy Williams based?

Cassidy Williams is based in Chicago, Illinois, United States while working with GitHub.

What companies has Cassidy Williams worked for?

Cassidy Williams has worked for Github, Stack Overflow, Cosynd, Inc., The Sukha Company, and Convex.

Who are Cassidy Williams's colleagues at GitHub?

Cassidy Williams's colleagues at GitHub include Sam Schreiber, Johana De Roxas, Jakub Oleksy, Anjuan S., and Sam Smith.

How can I contact Cassidy Williams?

You can use AeroLeads to view verified contact signals for Cassidy Williams at GitHub, including work email, phone, and LinkedIn data when available.

What schools did Cassidy Williams attend?

Cassidy Williams holds Bachelor Of Science (B.S.), Computer Science from Iowa State University.

What skills is Cassidy Williams known for?

Cassidy Williams is listed with skills including Javascript, Css, Html, Java, Jquery, Python, Public Speaking, and Html 5.

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