Denys Haryachyy
Senior SDN Software Engineer at 46 Labs
Lviv, Lviv Oblast, Ukraine
Summary
👤
Senior🎓
Top SchoolDenys Haryachyy is a Senior SDN Software Engineer based in Lviv with 20+ years of hands-on networking experience and 13 years in senior engineering roles, specializing in high-performance data plane development using C/C++, DPDK and VPP. He has architected and shipped production SD-WAN and real-time media solutions, integrating FRR for dynamic routing, implementing IPsec/IKEv2, and building custom L2 load-balancing and RTP bridging for carrier-scale scenarios. As a core developer at flexiWAN and a contributor to SONiC build tooling, he bridges embedded firmware, packet processing, and DevOps—often optimizing for specific silicon like Cavium, Marvell and Napatech. Denys combines low-level packet pipeline tuning with higher-level Python orchestration to deliver scalable, secure networking features across VXLAN, GRE, NAT, PPPoE and more. He’s led cross-functional teams, ported switching stacks between RTOSes, and even implemented custom link-state and discovery protocols for distributed switch control. Colleagues rely on him for pragmatic performance-first design that turns research-grade ideas into robust, deployable network products.
13 years of coding experience
16 years of employment as a software developer
Masters Computer Engineering, Masters Computer Engineering at State University 'Lviv Polytechnics'
English, Russian, Ukrainian
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (10)
bash10
docker10
dockers10
build-automation10
makefile9
debian-packaging9
jinja28
sonic8
redis7
networking7
Programming languages (4)
Github contributions (5)
sonic-net/sonic-buildimage
Sep 2016 - Jan 2017
Scripts which perform an installable binary image build for SONiC
Role in this project:
DevOps Engineer
DevOps EngineerContributions:7 commits, 7 PRs, 27 comments in 3 months
Contributions summary:Denys's contributions primarily focused on building and configuring Docker images for the SONiC build environment, specifically targeting Cavium hardware. They implemented build rules, added dependencies like SAI and XDK libraries, and synchronized syncd with redis. The user also transitioned the templating method to Jinja2 and downloaded Debian packages for Cavium.
armv6installableimage-buildsonicbinary-image
garyachy/SwitchEmu
Aug 2012 - Sep 2014
Contributions:21 commits in 2 years 1 month
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