Illarion Kovalchuk - Senior Software Engineer at Teradek

Illarion Kovalchuk

Senior Software Engineer at Teradek

Varna, Varna, Bulgaria

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Summary

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Rockstar

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Illarion Kovalchuk is a Senior Software Engineer with 11 years of experience building high-throughput, protocol-driven back-end systems and microservices. Based in Varna, Bulgaria, he architects, develops, deploys and supports multi-server Node.js and Go platforms, and has deep hands-on experience with custom TCP/UDP protocols, Redis and MongoDB. A longtime core contributor to the gobetween load balancer, he focuses on server infrastructure, protocol implementations and hardening proxy behavior under load. His background spans big-data and systems work—from Hadoop/Cassandra integrations to low-level userland OS tooling—giving him a rare mix of network, storage and systems expertise. Known for turning vague business needs into implementable, revenue-driving technical solutions, he pairs pragmatic engineering with research-minded hacking (ohm = f(programming, researching, hacking)). Colleagues rely on him for solving tricky timeout, protocol and scaling issues that hide under normal monitoring.

11 years of coding experience

10 years of employment as a software developer

Master’s Degree, Computer Engineering, Master’s Degree, Computer Engineering at Odessa State Academy of Refrigeration

English, Ukrainian, Russian

Stackoverflow

Stats

5,866reputation

1.6mreached

30answers

40questions

Badges

user-input

top-1%

argparse

top-5%

stream

top-5%

command-line-arguments

top-5%

Github Skills (23)

udp10

proxy10

go10

tcp10

golang10

load-balancer10

user-input10

command-line-arguments9

networking9

io9

argparse9

stream9

space9

ssh6

passwords6

Programming languages (6)

TypeScriptJavaC++JavaScriptGoPython

Github contributions (5)

yyyar/gobetween

Nov 2016 - Jun 2022

:cloud: Modern & minimalistic load balancer for the Сloud era

Role in this project:

Back-end Developer

Contributions:1 release, 3 reviews, 88 commits in 5 years 8 months

Contributions summary:Illarion primarily addressed bugs within the gobetween project, focusing on server-side logic and proxy configurations. A key contribution was fixing an issue with idle timeouts in the proxy functionality, ensuring correct handling of client and backend timeouts. The user also implemented a basic UDP protocol and refactored existing UDP code, demonstrating a focus on protocol implementation and server infrastructure. These changes reflect their role in maintaining and extending the core functionality of the load balancer.

proxy-serverproxysninpssrv

illarion/rtransaction

Jun 2019 - Feb 2023

Simple transaction engine for node.js with optional retries and rollback

Contributions:3 PRs, 4 pushes, 1 branch in 3 years 9 months

retriesnode-jstransactionnodejsrollback

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