Josef Fröhle
IT-Spezialist at B1 Systems
Bramsche, Lower Saxony, Germany
Summary
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RockstarJosef Fröhle is an IT specialist and entrepreneur with 13 years of hands-on experience building secure, reliable server and hosting solutions from his base in Bramsche, Germany. As founder and CEO of a web agency since 2009 and now working at B1 Systems, he blends customer-facing product delivery with deep technical expertise in security, cryptography, Alpine Linux, Docker, Node.js and Go. He is an active open-source contributor, notably improving IPv6 handling in the Haraka SMTP server and adding SAN/EV support to the pem certificate library, reflecting a focus on protocol correctness and practical PKI tooling. Comfortable across hosting operations and low-level backend development, Josef brings a pragmatic mindset that turns security and networking subtleties into robust, production-ready systems.
13 years of coding experience
English, German
Github Skills (21)
javascript10
haraka10
csr10
smtp10
smtps10
regex10
network-programming10
smtpd10
certificate10
ipv610
nodejs10
mta10
ssl9
tls129
tls139
Programming languages (29)
Github contributions (5)
haraka/Haraka
Sep 2015 - Oct 2016
A fast, highly extensible, and event driven SMTP server
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 releases, 50 commits, 84 PRs in 1 year 1 month
Contributions summary:Josef primarily contributed to the Haraka SMTP server's code base by addressing IPv6 compatibility issues, improving code robustness, and fixing bugs. They modified code across several plugins, including those related to authentication, connection handling, and DNS lookups to ensure the server could correctly handle IPv6 addresses. Their contributions demonstrate a focus on core server functionality and network protocol compliance, improving the reliability and standards compliance of the SMTP server.
harakasmtpmailmtajavascript
Dexus/node-gogetssl
Sep 2014 - Feb 2022
An API Client for GoGetSSL built on Node.js.
Contributions:6 commits, 4 PRs, 4 pushes in 7 years 5 months
api-clientapinode-jsnodejs
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