Julien Herr
CTO & Architecte Tech Senior at Borne Recharge Service
Strasbourg, Grand Est, France
Summary
🤩
Rockstar🎓
Top SchoolJulien Herr is a pragmatic CTO and senior software engineer with 12 years of experience building and modernizing back-end systems for the EV charging and SaaS domains from Strasbourg. He combines hands-on development (Kotlin, Java, PHP, Node/TypeScript, Spring, NestJS) with systems architecture and ops, having led legacy refactors, defined IT/OPS strategy and implemented OCPI and third-party integrations. As CTO of Borne Recharge and former VP of Engineering at Nabu.io he balances product roadmap, outsourcing, and team coaching while managing up to three juniors or alternants. An active open-source contributor, he has improved the widely used TestNG testing framework (Guice injection support, Java7 upgrades and tests), reflecting a taste for robust developer tooling. He is comfortable across the stack—from database and APIs to supervision UIs—and often takes ownership of both technical vision and day-to-day administration. Colleagues describe him as entrepreneurial, quality-driven, and focused on tangible user impact.
12 years of coding experience
15 years of employment as a software developer
Ingénieur Informatique et réseaux Informatique, Ingénieur Informatique et réseaux Informatique at ESIPE - École supérieure d’ingénieurs de Paris-EstScience computer, Science computer at SUPINFODiplôme universitaire de technologie (DUT) Informatique, Diplôme universitaire de technologie (DUT) Informatique at IUT Robert SCHUMAN
Stackoverflow
5,690reputation
544kreached
319answers
4questions
testing
top-5%
automated-tests
top-5%
selenium
top-5%
java
top-5%
selenium-webdriver
top-5%
Github Skills (19)
java10
javas10
testing9
selenium9
selenium-webdriver9
guice9
dependency-injection9
automated-tests9
api-design8
javadoc7
maven6
automation6
junit6
testng-dataprovider6
spring6
Programming languages (16)
Github contributions (5)
testng-team/testng
Mar 2015 - Nov 2022
TestNG testing framework
Role in this project:
Back-end Developer
Back-end DeveloperContributions:763 reviews, 535 commits, 359 PRs in 7 years 9 months
Contributions summary:Julien primarily focused on improving the TestNG testing framework by introducing new features and resolving existing issues. Their work involved adding support for Guice injection, handling dependencies, and updating the test framework to use Java 7 features. They contributed to the codebase through various code changes and by adding test cases to enhance the framework's capabilities.
testingtestngjavajvm
juherr/juherr.github.io
Apr 2020 - Jun 2026
Contributions:5 pushes, 4 branches in 6 years 3 months
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