Heikki Hannikainen
Owner at aprs.fi
Helsinki, Finland
Summary
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SeniorHeikki Hannikainen is a seasoned networking and systems engineer with 25 years of experience designing, implementing and troubleshooting large-scale LAN/WAN, hosting and access systems. As owner of aprs.fi and a long-time contributor to amateur radio software, he blends deep protocol-level expertise (IP, SMSC families) with hands-on Unix development in C, Perl, Python and shells. He has led networking architecture at F-Secure and served as Staff Software Engineer at Aiven, consistently focusing on reliable routing, load balancing and firewall solutions for high-scale services. His open-source firmware work on the widely used HackRF platform shows a practical knack for embedded systems and device identification challenges. Based in Helsinki, he pairs operator-level insight with developer rigor to bridge network infrastructure and application layers.
25 years of coding experience
25 years of employment as a software developer
Github Skills (14)
rft10
firmware10
c1710
rfe10
embedded10
fm-radio10
usb10
rfid10
f10
c1110
sys10
sdl10
hardware10
libusb9
Programming languages (11)
Github contributions (5)
greatscottgadgets/hackrf
Feb 2015 - May 2015
low cost software radio platform
Role in this project:
Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:15 commits, 1 PR, 12 comments in 3 months
Contributions summary:Heikki primarily focused on modifying the firmware for the HackRF platform. Their contributions included refactoring code related to USB serial number handling, including creating a dedicated API and header files for these functions. They introduced and implemented features to support device identification through serial numbers within the libhackrf library and updated the tools for working with the device’s SPI flash and CPLD, enabling the use of serial numbers.
pipewiredaclow-costcrossworduser-interface
hessu/aprs-symbols
Nov 2015 - Jul 2019
aprs.fi APRS symbol set, high-resolution, vector
Contributions:25 commits, 1 PR, 15 pushes in 3 years 9 months
symbolsaprsutmresolutionhigh-resolution
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