Jan Brennenstuhl
Principal Software Engineer, AppSec Information Security
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolJan Brennenstuhl is a product-minded Principal Software Engineer based in Berlin with 12 years of experience building and operating identity and customer IAM solutions at scale. Currently leading AppSec and information security initiatives at Zalando, he blends deep engineering craft with a strong focus on usable security and web authentication. His career progressed through hands-on backend and leadership roles within Zalando’s CIAM and Customer Data Platform, demonstrating a pattern of shipping pragmatic, user-centered security features. He holds a Master’s in Computer Science from Universität Potsdam and a background in media informatics, which informs his emphasis on human-friendly security design. Not obvious from titles alone, Jan repeatedly bridges product and platform concerns—designing for operators and end users alike—to make secure authentication both robust and approachable.
12 years of coding experience
8 years of employment as a software developer
Master's Degree, Computer Science, Very Good (1,4), Master's Degree, Computer Science, Very Good (1,4) at Universität Potsdam / University of PotsdamBachelor's Degree, Media Informatics, Good, Bachelor's Degree, Media Informatics, Good at Beuth University of Applied Sciences Berlin (formerly Technische Fachhochschule Berlin)
German, English
Stackoverflow
486reputation
44kreached
11answers
1question
jwt
top-5%
Github Skills (177)
web-application10
network-analysis10
proxy10
security10
duplicates10
command-line-tool10
passkey10
static-analysis10
email-validation10
python-bot10
mobile-application10
mobile-security10
mosaic10
spring-web10
android-application10
Programming languages (9)
Github contributions (5)
jbspeakr/personal-blog
Jun 2017 - Apr 2023
Contributions:3 PRs, 51 pushes, 3 branches in 5 years 10 months
jbspeakr-cycling/hubpress.io
Jul 2016 - Sep 2016
Contributions:209 pushes in 1 month
reactweb-application
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