Rostyslav Zatserkovnyi
Staff Machine Learning Engineer at Grid Dynamics
Lviv, Lviv Oblast, Ukraine
Summary
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Rockstar🎓
Top SchoolRostyslav Zatserkovnyi is a Staff Machine Learning Engineer based in Lviv with a decade of experience building data pipelines, ML systems, and backend services at companies like Grid Dynamics, DataRobot and Snowplow. He combines hands-on Scala and Python engineering with production ML—shipping fraud detection and LLM evaluation pipelines, terabyte-scale time-versioned APIs, and Spark-based enrichments that improved performance and reliability. A pragmatic open-source contributor, Rostyslav has improved developer UX and stability in prominent projects such as Processing and Snowplow, adding features like "Jump to Declaration" and IAB enrichment support. He has a strong functional-programming and distributed-systems pedigree, having optimized Spark jobs, implemented DynamoDB-based deduplication, and reduced query times from 20 to 5 minutes. Holding advanced degrees in computer science and data science and pursuing a PhD, he pairs research-level rigor with delivery-focused engineering. Colleagues describe him as the kind of engineer who notices and fixes small UX and error-handling issues that noticeably improve long-term maintainability.
10 years of coding experience
8 years of employment as a software developer
Master of Science - MS Data Science, Master of Science - MS Data Science at Ukrainian Catholic UniversityDoctor of Philosophy - PhD Computer Science, Doctor of Philosophy - PhD Computer Science at Ukrainian Academy of PrintingMaster of Science - MS Computer Science, Master of Science - MS Computer Science at Ivan Franko National University of LvivHigh School Applied Mathematics, High School Applied Mathematics at Lviv Physics and Mathematics Lyceum
English, Ukrainian
Stackoverflow
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Github Skills (38)
dependency-management10
develop10
spark10
preprocessing10
data-pipelines10
game-engine10
package-management10
game-dev10
pde10
ide10
ui-design10
analytics10
post-processing10
java10
language-processing10
Programming languages (15)
Github contributions (5)
MovingBlocks/Terasology
Feb 2016 - Nov 2021
Terasology - open source voxel world
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3 reviews, 175 commits, 61 PRs in 5 years 10 months
Contributions summary:Rostyslav focused on improving the user interface for inventory management in the game engine. They addressed zero-division errors, eliminated exception stack traces, and limited warnings to one per instance within the inventory grid module. Further commits included handling different languages for the UI elements and fixing text rendering.
gamegamedevsandboxgame-developmentvoxels
snowplow/snowplow
Nov 2017 - Jul 2018
The leader in Next-Generation Customer Data Infrastructure
Role in this project:Back-end Developer
Back-end DeveloperContributions:56 commits, 2 PRs, 37 pushes in 8 months
Contributions summary:Rostyslav's contributions focused on enhancing the Snowplow data pipeline with IAB (Interactive Advertising Bureau) Spiders & Robots enrichment. Their work included adding and configuring IAB enrichment within the Scala Common Enrich library and integrating it into the Spark and Stream enrich processes. This involved bumping dependencies, adding test cases and support for the IAB enrichment, and modifying configuration related to cached file downloads.
gcpdatabehavioralserver-sidedata-warehouse
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