Top Software Engineers in

Web and Mobile Security Technologies

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security
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javascript
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python
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java
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fuzzing

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 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
mozilla/gecko-dev
1957 commits in 9 years 5 months
ochameau/mozilla-central
1498 commits in 4 years 8 months
lissyx/mozilla-central
637 commits in 3 years 2 months
Top skills
Score
snippet
10
characteristics
10
http
10

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2

Philip Jägenstedt
Long live the web! at Google
/
Sweden
Rock Star
15 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
mdn/browser-compat-data
5279 reviews, 607 commits, 3463 PRs in 4 years 11 months
foolip/day-to-day
14 reviews, 1162 commits, 154 PRs in 5 years 5 months
web-platform-tests/results-analysis
30 reviews, 1135 commits, 45 PRs in 4 years 4 months
Top skills
Score
html5
10
client-side
10
minecraft
10

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3

Simon Pieters
Employed at Mozilla
/
Sweden
Rock Star
17 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
web-platform-tests/wpt
150 reviews, 981 commits, 1047 PRs in 10 years 8 months
whatwg/xref
74 commits in 2 years 7 months
mozilla/gecko-dev
250 commits in 4 years 10 months
Top skills
Score
snippet
10
webview2
10
json
10

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4

Rebecca Hauck
Senior Technical Product Manager at Paypal
/
United States
12 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
web-platform-tests/wpt
933 commits in 2 years 9 months
w3c/testtwf-website
264 commits in 1 year 1 month
WebPlatformForEmbedded/WPEWebKit
13 commits in 2 years 8 months
Top skills
Score
snippet
10
google-chrome
10
web-platform
10

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5

Sam Sneddon
Software Engineer at Apple
/
United States
Rock Star
18 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
web-platform-tests/wpt
204 reviews, 893 commits, 1725 PRs in 13 years 5 months
simplepie/simplepie
714 commits, 1 PR, 4 comments in 14 years
web-platform-tests/wpt-metadata
2 reviews, 101 commits, 12 PRs in 2 years 4 months
Top skills
Score
snippet
10
dom
10
webengine
10

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6

Michael Pennisi
Web Developer at Bocoup
/
United States
Rock Star
13 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
bocoup/test262
818 commits, 4 PRs, 746 pushes in 6 years 10 months
bocoup/wpt
2100 commits, 19 PRs, 986 pushes in 4 years 4 months
tc39/test262
140 reviews, 527 commits, 430 PRs in 7 years 11 months
Top skills
Score
html5
10
automation
10
xml-parser
10

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7

Anne van Kesteren
Employed at apple
/
Norway
Rock Star
17 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
whatwg/xref
229 commits, 11 PRs, 59 pushes in 5 years 10 months
web-platform-tests/wpt
668 reviews, 861 commits, 1455 PRs in 12 years 8 months
whatwg/encoding
34 reviews, 450 commits, 192 PRs in 11 years
Top skills
Score
html5
10
testing
10
tla
10

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8

David Korczynski
CEO, ADA Logics, Oxford CS PhD at Ada Logics
/
United Kingdom
Rock Star
TOP CONTRIBUTIONS TO PROJECTS
google/oss-fuzz
1788 reviews, 857 commits, 2754 PRs in 2 years 11 months
ossf/fuzz-introspector
670 reviews, 626 commits, 1252 PRs in 1 year 1 month
fluent/fluent-bit
25 reviews, 197 commits, 152 PRs in 2 years 9 months
Top skills
Score
tiling
10
sound-files
10
nodejs
10

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9

Emilio Cobos Álvarez
Gecko Hacker at Mozilla
/
Spain
Rock Star
12 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
servo/servo
10 reviews, 2667 commits, 921 PRs in 5 years 11 months
ochameau/mozilla-central
2251 commits in 3 years
lissyx/mozilla-central
3122 commits in 2 years 2 months
Top skills
Score
html5
10
darkmode
10
fundamentals
10

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10

Jonathan Metzman
Software Engineer on Google Open Source Security Team at Google
/
United States
Rock Star
TOP CONTRIBUTIONS TO PROJECTS
google/oss-fuzz
1988 reviews, 776 commits, 2948 PRs in 4 years 11 months
jonathanmetzman/cifuzz-external-example
543 commits, 5 PRs, 572 pushes in 2 years 1 month
google/fuzzbench
503 reviews, 487 commits, 940 PRs in 2 years 11 months
Top skills
Score
benchmarking
10
testing
10
tls13
10

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11

Michael Smith
Man about Town, Non-Executive, Jackass at W3c
/
Japan
Rock Star
22 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
mdn/browser-compat-data
552 reviews, 636 commits, 1147 PRs in 4 years 4 months
docbook/xslt10-stylesheets
3499 commits in 8 years 4 months
mdn/content
6436 reviews, 722 commits, 4777 PRs in 2 years
Top skills
Score
snippet
10
standardization
10
wpe
10

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12

Abhishek Arya
Manager, Partner Operations - IN/SEA at YouTube
/
Singapore
Rock Star
14 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
WebPlatformForEmbedded/WPEWebKit
389 commits in 2 years 11 months
eseidel/webkit
374 commits in 2 years 6 months
google/oss-fuzz
928 reviews, 639 commits, 2103 PRs in 5 years 3 months
Top skills
Score
vulnerability-scanner
10
ios
10
safari
10

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13

Mike Aizatsky
Software Engineering at Cloudflare
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United States
Rock Star
16 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
google/oss-fuzz
624 commits, 79 PRs, 792 pushes in 7 months
mikea/gdrive-webdav
3 reviews, 63 commits, 50 pushes in 9 years 9 months
mikea/ztd
105 commits in 2 months
Top skills
Score
webassembly
10
onedrive
10
shim
10

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14

Florian Rivoal
Engineer, MBA, Web Standards Expert at Independent
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Japan
Rock Star
14 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
w3c/csswg-drafts
44 reviews, 1595 commits, 242 PRs in 10 years 4 months
operasoftware/presto-testo
32 commits, 15 PRs, 23 pushes in 1 year 3 months
web-platform-tests/wpt
11 reviews, 504 commits, 555 PRs in 9 years 9 months
Top skills
Score
snippet
10
firefox-addon
10
webbrowser
10

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15

Oliver Chang
Senior Staff Software Engineer at Google
/
Australia
Rock Star
12 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
pypa/advisory-database
78 reviews, 66 commits, 97 PRs in 1 year 5 months
google/oss-fuzz-vulns
24 reviews, 76 commits, 21 PRs in 1 year 9 months
google/clusterfuzz
12 releases, 1299 reviews, 737 commits in 4 years
Top skills
Score
benchmarking
10
seccomp
10
infrastructure
10

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16

Stephen Mcgruer
Staff Software Developer, Google at Google
/
Canada
Rock Star
12 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
web-platform-tests/wpt-metadata
28 reviews, 196 commits, 238 PRs in 2 years 8 months
bigben0123/chromium.bb
669 commits in 4 years 8 months
scheib/chromium
726 commits in 7 years
Top skills
Score
snippet
10
react
10
blink
10

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17

Morten Stenshorne
Web layout engine advancer at Google
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Norway
Rock Star
TOP CONTRIBUTIONS TO PROJECTS
scheib/chromium
1351 commits in 4 years 4 months
bigben0123/chromium.bb
1045 commits in 2 years 1 month
web-platform-tests/wpt
28 reviews, 470 commits, 7 PRs in 5 years 2 months
Top skills
Score
snippet
10
git
10
webbrowser
10

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18

Koji Ishii
Software Engineer at Google
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Japan
Rock Star
14 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
bigben0123/chromium.bb
2936 commits in 5 years 2 months
scheib/chromium
2592 commits in 7 years 5 months
web-platform-tests/wpt
17 reviews, 446 commits, 40 PRs in 8 years 1 month
Top skills
Score
snippet
10
devtools
10
fundamentals
10

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19

Manuel Rego Casasnovas
Developer at Igalia
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Spain
Rock Star
15 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
LibrePlan/libreplan
2899 commits in 3 years 11 months
WebPlatformForEmbedded/WPEWebKit
315 commits in 9 years 7 months
Igalia/webengineshackfest
6 reviews, 294 commits, 12 PRs in 7 years 9 months
Top skills
Score
snippet
10
gtk
10
compatibility
10

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20

Aryeh Gregor
Employed at Looking for work
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Israel
Rock Star
17 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
ochameau/mozilla-central
1602 commits in 5 years 7 months
w3c/editing
731 commits, 1 PR, 12 comments in 5 years 7 months
web-platform-tests/wpt
403 commits, 246 PRs, 19 pushes in 6 years
Top skills
Score
snippet
10
branches
10
subject
10

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