Dmitry Markin
Team Lead at EPAM Systems
Ukraine
Summary
🤩
Rockstar🎓
Top SchoolDmitry Markin is a Team Lead and full-stack engineer from Ukraine with 8 years of professional software experience and a long history of web-development and systems administration. He blends frontend expertise (React, TypeScript, Ember) with backend and DevOps work, notably contributing to high-profile open-source blockchain projects like Parity’s Polkadot and Substrate where he refactored and cleaned up light-client and network code. At EPAM he progressed from Senior Frontend Developer to Team Lead, steering cross-functional teams while still hands-on in code and infrastructure. His background includes decades of practical systems work—from LAN and Oracle administration to running long-term freelance web projects—which gives him a pragmatic, full-lifecycle view of product delivery. Notably, his open-source contributions show an eye for maintainability and protocol-level correctness in distributed systems, not just feature work.
8 years of coding experience
7 years of employment as a software developer
LAN administrator, LAN, LAN administrator, LAN at Computer Academy StepSpecialist, Statistics, 4.85/5, Specialist, Statistics, 4.85/5 at Oles Honchar Dnipro National UniversityMaster's degree, Computer Science, 11.5/12, Master's degree, Computer Science, 11.5/12 at Ukrainian State University of Science and TechnologiesJavaScript, JavaScript at Maxymiser Academy
Английский, Украинский, Русский
Github Skills (17)
substrate10
clientside10
polkadot-js10
network-protocol10
blockchain10
webclient10
nodejs10
protocols10
rust10
polkadot10
nodes10
cli10
devops9
parity9
networking7
Programming languages (8)
Github contributions (5)
paritytech/polkadot-sdk
Aug 2023 - Apr 2025
The Parity Polkadot Blockchain SDK
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:445 reviews, 86 PRs, 353 pushes in 1 year 7 months
Contributions summary:Dmitry primarily contributed to the cleanup and removal of light client-related code and functionality within the Parity Polkadot Blockchain SDK. Their work involved removing unused CLI options, cleaning up leftover code, and improving formatting. Furthermore, the user made changes to various network and service configurations, indicating work in DevOps and backend areas. These modifications spanned multiple files related to blockchain client service and network configurations.
blockchaincumuluspolkadotsubstrate
paritytech/substrate
Jul 2022 - Jan 2023
Substrate: The platform for blockchain innovators
Role in this project:Back-end Developer
Back-end DeveloperContributions:291 reviews, 39 commits, 54 PRs in 6 months
Contributions summary:Dmitry's contributions focused on cleaning up and refactoring the light client functionality within the Substrate framework. This involved removing unused code, addressing light client leftovers, and fixing code formatting. The changes touch upon core client service and network components, indicating a focus on improving the codebase's efficiency and maintainability. The work also includes modifications to the CLI configurations and build processes.
substraterustblockchainparitypolkadot
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