Jakub Karolczyk
Senior Software Engineer at SignalWire
Stony Stratford, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolJakub Karolczyk is a Senior Software Engineer specializing in RTC and VoIP with over 15 years in telecommunications and seven years focused on software engineering roles. Currently at SignalWire, he brings deep back-end expertise improving conference management and SIP handling in high-scale voice platforms, with notable open-source contributions to the prominent FreeSWITCH project. His career spans hands-on roles from IVR and IP telephony engineering to DevOps for voice services and UCaaS solutions, blending systems-level coding with operations and product-facing delivery. Based in Stony Stratford, he combines an MS in Electronics/Photonics with practical telecom lab-to-production experience, and a pattern of fixing subtle stability and code-quality issues that keep real-time communications reliable.
6 years of coding experience
15 years of employment as a software developer
Master of Science - MS Electronics Photonics Microsystems, Master of Science - MS Electronics Photonics Microsystems at Wrocław University of Science and Technology
Github Skills (10)
telephony10
c1710
sips10
c1110
voip10
freeswitch10
coder10
sip10
apidoc9
api9
Programming languages (3)
Github contributions (5)
signalwire/freeswitch
Nov 2021 - Sep 2022
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a versatile software implementation that runs on any commodity hardware. From a Raspberry PI to a multi-core server, FreeSWITCH can unlock the telecommunications potential of any device.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:38 reviews, 3 commits, 47 PRs in 9 months
Contributions summary:Jakub's primary contributions involve adding and modifying APIs within the mod_conference module of the FreeSWITCH project. These changes include implementing APIs for setting and getting conference variables, setting conference vars from core/channel variables. In addition, they have made contributions related to handling late offers within the mod_sofia module and fixing Coverity code analysis issues. These changes indicate a focus on improving the core functionality and stability of the FreeSWITCH platform, specifically related to conference management and SIP endpoint handling.
telecomproprietarytelecommunicationswebrtccommodity-hardware
jakubkarolczyk/freeswitch
Mar 2021 - Sep 2022
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a versatile software implementation that runs on any commodity hardware. From a Raspberry PI to a multi-core server, FreeSWITCH can unlock the telecommunications potential of any device.
Contributions:24 pushes, 18 branches in 1 year 6 months
telecomproprietarytelecommunicationscommodity-hardwaremulti-core
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