Sergey Galkin
Software Engineer at Reddit, Inc.
Old Toronto, Ontario, Canada
Summary
👤
Senior🎓
Top SchoolSergey Galkin is a software engineer with over a decade of hands-on experience building and leading teams that deliver high-availability payment and web systems. He has progressed from developer to leadership roles—including CTO and Head of Development—driving reliability improvements (99.9% uptime) and raising on-time delivery from 50% to 90% at scale. At Wallet One he architected a card payment gateway from scratch and at ISOLUX led a major frontend redesign that dramatically improved performance and mobile experience. More recently he’s been at Reddit, contributing to platform-scale engineering since 2020 and holding a Staff Software Engineer role in 2024. Based in Old Toronto, Sergey combines a systems-analysis MS from Moscow Aviation Institute with pragmatic product-oriented engineering, often bridging technical delivery and client onboarding. He brings a rare mix of payment-domain depth, operational rigor, and front-to-back technical fluency.
11 years of coding experience
13 years of employment as a software developer
Master of Science (MS) Systems analysis and control, Master of Science (MS) Systems analysis and control at Moscow Aviation Institute (National Research University)
English, Russian
Github Skills (82)
opensearch10
graalvm10
client-server10
elasticsearch10
reactor10
udp10
reactive10
ipc10
search-engine10
java10
android10
quic10
spring-boot10
flux10
square10
Programming languages (7)
Github contributions (5)
fred84/elasticsearch
May 2017 - Mar 2018
Contributions:6 PRs, 97 pushes, 15 branches in 9 months
restfulsearch-enginedatabaseelasticsearchjava
fred84/delayedQueue
Sep 2019 - Aug 2020
Contributions:2 reviews, 30 commits, 39 PRs in 11 months
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