Ihar Hrachyshka
Senior System Software Engineer at Open Virtual Network (OVN)
Waxhaw, North Carolina, United States
Summary
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RockstarIhar Hrachyshka is a Senior System Software Engineer with 18 years of experience specializing in cloud networking, virtualization, and infrastructure automation. He has deep open-source roots—contributing to core projects like OpenStack (Neutron, Nova, Tempest), OVN, KubeVirt and DevStack—where he’s driven MTU, VXLAN, SR-IOV and QoS improvements as well as testing and debugging tooling. A pragmatic backend and DevOps engineer fluent in Python and systems-level networking, he pairs bug fixes and performance work with test automation and documentation to improve reliability end-to-end. Previously a Principal at Red Hat and now at NVIDIA, he bridges community leadership and hands-on engineering, often operating in stable-branch maintenance and release management roles. Notably, his contributions routinely span controller code, CI/build optimizations and user-facing CLI/tooling (e.g., torchtune/llama-stack and multi-stage container builds), showing a rare mix of low-level protocol knowledge and developer ergonomics.
19 years of coding experience
18 years of employment as a software developer
English, Russian, Russian, Czech
Github Skills (68)
python10
nix10
testing10
test-framework10
bash10
dotfile10
c1110
c1710
backend10
tempo10
thunderbird10
nixos10
linux10
dockers10
api10
Programming languages (29)
Github contributions (5)
openstack/neutron
Jan 2014 - Nov 2022
OpenStack Networking (Neutron). Mirror of code maintained at opendev.org.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:715 commits, 1 comment in 8 years 11 months
Contributions summary:Ihar's contributions primarily focused on enhancing the Neutron networking service, particularly within the context of the OpenStack project. They implemented patches to consistently use JSON utilities, thereby enabling C-boosted encoding and decoding for Python 2.6. The user also introduced the rpc_compat.create_connection() method for emulating oslo-rpc API using oslo.messaging, while refactoring the RPC layer and implementing versioned objects for security group resources. The changes also included updates to handle changes related to the new OVN support for the ML2 networking mechanism driver and the update of the MTU settings in the agent.
networkingopenstack
ovn-org/ovn
Feb 2020 - Jan 2023
Open Virtual Network
Role in this project:Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:86 commits, 4 comments in 2 years 11 months
Contributions summary:Ihar's contributions primarily involve enhancing the Open Virtual Network (OVN) project's functionality and stability. They focused on addressing VXLAN-related issues, implementing constraints on datapath and port keys, and resolving basic multicast flow problems. Their work included modifications to the controller code to deliver multicast traffic to local ports, and the addition of a QOS feature with a minimum bandwidth guarantee. The user also added several tests to ensure the integrity of the changes.
p2pvirtual-networkblockchain
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