Top Software Engineers in

Web and Mobile Security Technologies

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security
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fuzzing
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javascript
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python

Web and Mobile Security Technologies focus on techniques and tools to safeguard applications and data on web platforms and mobile devices. It encompasses practices in cryptography, vulnerabilities management, and privacy, ensuring secure, stable, and high-performance environments across various programming languages and frameworks.

Ranks are based on the open source contributions and reassessed every 30 days

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1

jgraham
/
Rock Star
17.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
web-platform-tests/wpt
Wpt: 3733 commits in 12 years 5 months
mozilla/gecko-dev
Gecko-dev: 1957 commits in 9 years 5 months
ochameau/mozilla-central
Mozilla-central: 1498 commits in 4 years 8 months
Top skills
Score
browser
10
firefox
9
gecko
9

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2

Philip Jägenstedt
Long live the web! at Google
/
Sweden
Rock Star
18.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
foolip/day-to-day
Day-to-day: 1162 commits in 5 years 5 months
web-platform-tests/results-analysis
Results-analysis: 1135 commits in 4 years 4 months
web-platform-tests/wpt
Wpt: 1071 commits in 9 years 2 months
Top skills
Score
compatibility
10
json
10
javascript
6

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3

Simon Pieters
Employed at Mozilla
/
Sweden
Rock Star
17.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
web-platform-tests/wpt
Wpt: 981 commits in 10 years 8 months
mozilla/gecko-dev
Gecko-dev: 250 commits in 4 years 10 months
whatwg/html
Html: 240 commits in 7 years 3 months
Top skills
Score
html
10
testing
10
firefox
10

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4

Garrett Beaty
Software Engineer at Google
/
United States
18.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
scheib/chromium
Chromium: 545 commits in 3 years 9 months
chromium/chromium
Chromium: 426 commits in 2 years 8 months
otcshare/chromium-src
Chromium-src: 173 commits in 3 years 8 months
Top skills
Score
chrome
10
chromium
10
downloading
1

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5

Rebecca Hauck
Senior Technical Product Manager | ex-Adobe at Adobe
/
United States
26.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
web-platform-tests/wpt
Wpt: 933 commits in 2 years 9 months
w3c/testtwf-website
Testtwf-website: 264 commits in 1 year 1 months
adobe/web-platform
Web-platform: 80 commits in 1 year 4 months
Top skills
Score
webkit
10
test-automation
10
microsoft-edge
10

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6

Sam Sneddon
Software Engineer at Apple
/
United Kingdom
Rock Star
15.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
web-platform-tests/wpt
Wpt: 893 commits in 13 years 5 months
simplepie/simplepie
Simplepie: 714 commits in 14 years
html5lib/html5lib-python
Html5lib-python: 430 commits in 12 years 6 months
Top skills
Score
browser
10
web-standards
10
javascript
10

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7

Michael Pennisi
Web Developer at Bocoup
/
United States
Rock Star
13.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
bocoup/wpt
Wpt: 2100 commits in 4 years 4 months
jugglinmike/jshint
Jshint: 1018 commits in 8 years 7 months
web-platform-tests/wpt
Wpt: 865 commits in 5 years 4 months
Top skills
Score
javascript
10
html
9
dom
8

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8

Anne van Kesteren
Employed at apple
/
Norway
Rock Star
17.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
whatwg/dom
Dom: 1207 commits in 12 years 6 months
web-platform-tests/wpt
Wpt: 861 commits in 12 years 8 months
whatwg/fetch
Fetch: 717 commits in 11 years 7 months
Top skills
Score
html
10
javascript
10
dom
8

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9

David Korczynski
CEO, ADA Logics, Oxford CS PhD at Ada Logics
/
United Kingdom
Rock Star
TOP CONTRIBUTIONS TO PROJECTS
google/oss-fuzz
Oss-fuzz: 857 commits in 2 years 11 months
ossf/fuzz-introspector
Fuzz-introspector: 626 commits in 1 year 1 months
fluent/fluent-bit
Fluent-bit: 197 commits in 2 years 9 months
Top skills
Score
fuzzing
10
vulnerabilities
10
stability
10

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10

Emilio Cobos Álvarez
Gecko Hacker at Mozilla
/
Spain
Rock Star
TOP CONTRIBUTIONS TO PROJECTS
lissyx/mozilla-central
Mozilla-central: 3122 commits in 2 years 2 months
servo/servo
Servo: 2667 commits in 5 years 11 months
ochameau/mozilla-central
Mozilla-central: 2251 commits in 3 years
Top skills
Score
browser
10
servo
10
rust
10

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11

Jonathan Metzman
Software Engineer on Google Open Source Security Team at Google
/
United States
Rock Star
11.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
google/oss-fuzz
Oss-fuzz: 776 commits in 4 years 11 months
jonathanmetzman/cifuzz-external-example
Cifuzz-external-example: 543 commits in 2 years 1 months
google/fuzzbench
Fuzzbench: 487 commits in 2 years 11 months
Top skills
Score
fuzzing
10
stability
10
fuzz-testing
10

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12

Michael Smith
Man about Town, Non-Executive, Jackass at W3c
/
Japan
Rock Star
25.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
docbook/xslt10-stylesheets
Xslt10-stylesheets: 3499 commits in 8 years 4 months
validator/validator
Validator: 2897 commits in 14 years
mdn/content
Content: 722 commits in 2 years
Top skills
Score
javascript
10
web-development
10
html
10

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13

Abhishek Arya
Employed at Google
/
Netherlands
Rock Star
14.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
google/clusterfuzz
Clusterfuzz: 667 commits in 2 years 7 months
google/oss-fuzz
Oss-fuzz: 639 commits in 5 years 3 months
WebPlatformForEmbedded/WPEWebKit
WPEWebKit: 389 commits in 2 years 11 months
Top skills
Score
fuzzing
10
stability
10
vulnerabilities
10

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14

Mike Aizatsky
Software Engineering at Cloudflare Inc
/
United States
Rock Star
16.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
google/oss-fuzz
Oss-fuzz: 624 commits in 7 months
satori-com/satori-video-sdk-cpp
Satori-video-sdk-cpp: 161 commits in 3 months
mikea/ztd
Ztd: 105 commits in 2 months
Top skills
Score
fuzzing
10
stability
10
vulnerabilities
10

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15

Oliver Chang
Senior Staff Software Engineer at Google
/
Australia
Rock Star
11.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
google/clusterfuzz
Clusterfuzz: 737 commits in 4 years
google/oss-fuzz
Oss-fuzz: 609 commits in 6 years 5 months
google/osv.dev
Osv.dev: 339 commits in 2 years
Top skills
Score
vulnerabilities
10
stability
10
fuzzing
10

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16

Florian Rivoal
Engineer, MBA, Web Standards Expert at Lycee Francais International De Kyoto
/
Japan
Rock Star
22.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
w3c/csswg-drafts
Csswg-drafts: 1595 commits in 10 years 4 months
w3c/w3process
W3process: 677 commits in 4 years 5 months
web-platform-tests/wpt
Wpt: 504 commits in 9 years 9 months
Top skills
Score
firefox
10
testing
10
gecko
10

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17

Stephen Mcgruer
Staff Software Developer, Google at Google
/
Canada
Rock Star
14.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
scheib/chromium
Chromium: 726 commits in 7 years
bigben0123/chromium.bb
Chromium.bb: 669 commits in 4 years 8 months
web-platform-tests/wpt
Wpt: 492 commits in 5 years 6 months
Top skills
Score
gecko
10
browser
10
firefox
10

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18

Morten Stenshorne
Web layout engine advancer at Google
/
Norway
Rock Star
26.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
scheib/chromium
Chromium: 1351 commits in 4 years 4 months
bigben0123/chromium.bb
Chromium.bb: 1045 commits in 2 years 1 months
mozilla/gecko-dev
Gecko-dev: 481 commits in 4 years 11 months
Top skills
Score
firefox
10
browser
10
gecko
10

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19

Kevin Grandon
Purveyor of Fine Technologies at Promoted Ai
/
United States
Rock Star
17.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
mozilla-b2g/gaia
Gaia: 3176 commits in 3 years 3 months
fusionjs/fusionjs
Fusionjs: 680 commits in 2 years 8 months
KevinGrandon/ghostjs
Ghostjs: 332 commits in 2 years 8 months
Top skills
Score
javascript
10
gecko
10
gaia
10

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20

Koji Ishii
Employed at Van Ginneke Social Enterprise
/
Japan
Rock Star
13.0 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
bigben0123/chromium.bb
Chromium.bb: 2936 commits in 5 years 2 months
scheib/chromium
Chromium: 2592 commits in 7 years 5 months
w3c/csswg-drafts
Csswg-drafts: 478 commits in 7 years 2 months
Top skills
Score
html
10
blink
10
firefox
10

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