Sergey Reznikov
Product & Data Analyst
Moscow, Moscow, Russia
Summary
👤
Senior🎓
Top SchoolSergey Reznikov is a Product & Data Analyst with over 14 years of experience delivering analytics and automation for high‑traffic products and complex integrations. He has driven measurable business impact—automating P&L reporting across 150+ metrics, boosting sales 21% on a $10M turnover, and scaling CSAT coverage 5.7x using LLM-based scoring. Comfortable across the stack, Sergey blends SQL, Python, BI tooling and ETL design to run analytics for platforms with MAUs in the hundreds of thousands and has reduced reporting time by 80% through process optimisation. His background in engineering and systems integration — including contributions to the Haiku OS and HaikuPorts open-source projects — gives him a pragmatic, systems‑level view of product problems. Colleagues rely on him to turn messy, large datasets into daily operational metrics and reliable recommendations that improve product and operational performance.
14 years of coding experience
18 years of employment as a software developer
Master's degree, Electrical, Electronic and Communications Engineering Technology/Technician, Master's degree, Electrical, Electronic and Communications Engineering Technology/Technician at National Research University of Electronic Technology (MIET)
English
Github Skills (16)
uid10
c-language10
front-end-development10
ui-design10
cprogramming-language10
package-management10
patch10
haiku10
operating-system9
sys9
debug9
localization8
kernel-mode7
file-management7
kernel7
Programming languages (13)
Github contributions (5)
haikuports/haikuports
Jun 2014 - Dec 2022
Software ports for the Haiku operating system.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:45 reviews, 1244 commits, 704 PRs in 8 years 7 months
Contributions summary:Sergey contributed to the HaikuPorts project by merging changes from other repositories into the main branch. This involved modifying various configuration files and patches related to software ports for the Haiku operating system. The user's work ensured that software packages, such as vim, mtr, mc, samba, and others, were compatible with the Haiku platform.
haiku-osoperating-systemhaikupackage-managerlinux
haiku/haiku
Dec 2011 - May 2020
The Haiku operating system. (Pull requests will be ignored; patches may be sent to https://review.haiku-os.org).
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:13 commits, 1 comment in 8 years 6 months
Contributions summary:Sergey primarily contributed to the Haiku operating system's user interface and application functionality. Their work included localizing dialog titles, fixing casing inconsistencies, and addressing drawing issues within the notification group header. Additionally, the user added and modified shortcuts within the file panel and open-with window and addressed screen saver vulnerabilities. They also contributed to fixing 64-bit kernel issues and adding missing compilation components.
kernelhaiku-osoperating-systemhaikulinux
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