Jakub Witczak
Erlang Programmer at Ericsson
Lodz Metropolitan Area Poland
Summary
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RockstarJakub Witczak is a seasoned Erlang programmer with a decade of experience building and testing telecommunications and backend systems, currently contributing at Ericsson from Lodz, Poland. He blends deep protocol and systems knowledge—demonstrated by contributions to the widely used Erlang/OTP ssl module improving X.509 handling and test suites—with hands-on C, Java, and RPG work across large telecom and enterprise projects. His roles have spanned developer, trainer, technical lead and scrum master, reflecting both individual contributor depth and team-facing mentorship. Comfortable across verification, automation and product development, he repeatedly brings testing rigor to production code and complex infrastructure. Colleagues can expect a pragmatic engineer who seeks continuous learning and quietly improves reliability in security-sensitive parts of the stack.
10 years of coding experience
12 years of employment as a software developer
English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (11)
certificate10
x509certificates10
ssl10
tls1210
erlang10
cert10
x509certificate210
tls1310
testing10
cryptography9
file-handling8
Programming languages (4)
Github contributions (5)
erlang/otp
Apr 2021 - Jan 2023
Erlang/OTP
Role in this project:
Back-end Developer
Back-end DeveloperContributions:580 reviews, 169 commits, 284 PRs in 1 year 9 months
Contributions summary:Jakub contributed to the Erlang/OTP project, primarily focusing on the `ssl` module. Their work involved enhancing the handling of X.509 certificates within the SSL/TLS implementation, converting file paths for certificate data, and adjusting options related to certificate verification. Furthermore, their commits included improvements to the `ssl_pem_cache_SUITE` test suite and related testing procedures, confirming their involvement in both code implementation and testing. The user's contributions demonstrate a focus on improving the reliability and functionality of SSL/TLS operations within the Erlang/OTP ecosystem.
gleamerlangbeamerlang-otpelixir
u3s/otp
Apr 2021 - Mar 2025
Erlang/OTP
Contributions:4 PRs, 324 pushes, 133 branches in 3 years 11 months
gleamerlangerlang-otpfactorelixir
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