Justin Crawford
Product Manager, Supercell ID
Finland
Summary
🤩
Rockstar🎓
Top SchoolJustin Crawford is a technical product leader with 14 years’ experience designing and scaling web platforms and user acquisition systems, currently leading Supercell ID product efforts from Finland. He has a strong track record building cross-functional teams and platform tooling that unlock growth—at Wolt he organized ~25 people into acquisition and onboarding squads and delivered experiments that materially lifted conversion and marketing opt-ins. Earlier roles at MongoDB and Mozilla combined engineering leadership, atomic design systems, localization and experimentation to boost traffic, developer docs (MDN) and large-scale marketing sites serving billions of sessions. Justin pairs hands-on full‑stack development and CRO experience (notably contributions to Mozilla projects like MDN and Kitsune) with a habit of institutionalizing hypothesis-driven culture and product telemetry. He’s drawn to work that makes things measurably better and has the uncommon mix of startup founder chops and enterprise platform delivery.
14 years of coding experience
17 years of employment as a software developer
Growth Series, Growth Series at ReforgeFoundations Focus Build, Foundations Focus Build at Pragmatic MarketingM.A. Journalism, M.A. Journalism at University of Colorado Boulder
Stackoverflow
71reputation
3kreached
1answer
0questions
Github Skills (33)
javascript10
jinja210
django10
css10
mdc10
mdns10
responsive-design10
ab-testing10
firefox10
front-end-development10
mdt10
html10
abtest10
testing9
user-interface9
Programming languages (16)
Github contributions (5)
mozilla/bedrock
Mar 2014 - Sep 2020
Making mozilla.org awesome, one pebble at a time
Role in this project:
Front-end Developer
Front-end DeveloperContributions:33 commits, 28 PRs, 6 pushes in 6 years 6 months
Contributions summary:Justin primarily contributed to the front-end aspects of the "mozilla/bedrock" repository, focusing on the Firefox release notes and other website pages. Their commits included adding and modifying CSS and HTML files, particularly for visual enhancements, mobile responsiveness, and implementing UI elements like download buttons and navigation menus. Furthermore, they implemented experiment variations using Javascript and traffic cop, and incorporated Optimzely blocks within the HTML templates for A/B testing.
pebblefirefoxpythondjangocss
mdn/kuma
Jul 2014 - Oct 2015
The project that powers MDN.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:23 commits, 5 PRs, 40 comments in 1 year 3 months
Contributions summary:Justin contributed to various aspects of the MDN web documentation project, including implementing a spell checker plugin, updating the contributor box on the homepage, and modifying the Dev Derby landing page. They also worked on removing author licenses and integrating a helpfulness feedback interface using Google Analytics. Their contributions involved both frontend (HTML, CSS, JavaScript) and backend (Python, Django) code changes.
reactpythonsasscssjavascript
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