Dmytro Dumanskiy
Chief Technology Officer at Blynk
Kyiv, Ukraine
Summary
🤩
Rockstar🎓
Top School
Top expert inInternet of Things (IoT) Development and Prototyping
Dmytro Dumanskiy is a hands-on CTO and co-founder with 13+ years building high-load, production Java systems and IoT platforms, including Blynk where he shapes backend and server architecture. He specializes in performance optimization and low-maintenance distributed systems—having delivered IoT clouds and ad-tech projects handling up to 100k req/sec—and is a long-time Netty contributor and maintainer of clickhouse4j. His stack fluency spans core Java, Spring, Netty, columnar and NoSQL databases, search engines, and big data tools, plus practical computer vision experience for image/video processing. Dmytro’s open-source contributions include performance fixes to the widely used Netty framework and active work on the popular Blynk repos, reflecting a blend of product-focused engineering and platform-level impact. Based in Kyiv, he pairs entrepreneurial leadership with deep implementation skills, often surfacing non-obvious optimizations that cut operational cost and complexity.
13 years of coding experience
8 years of employment as a software developer
Specialist, Computer Science/Automated System Software, Specialist, Computer Science/Automated System Software at National Aviation University
English, Ukrainian, Russian
Stackoverflow
12,257reputation
2.7mreached
52answers
40questions
authentication
top-5%
rest
top-5%
security
top-5%
java
top-5%
netty
top-5%
Github Skills (39)
netty10
mqtt10
refactor10
java10
mqttnet10
esp826610
javas10
iot10
performance-optimization10
embedded10
refactoring10
arduino10
server10
server-side10
c-language9
Programming languages (8)
Github contributions (5)
Peterkn2001/blynk-server
Dec 2020 - May 2021
This is a fork of the now discontinued and unsupported Blynk Legacy Local Server documentation and releases.
Role in this project:
Backend Developer
Backend DeveloperContributions:25 commits in 5 months
Contributions summary:Dmytro primarily focused on improving the server-side logic of the Blynk server. Their contributions include adding properties to disable certificate renewal and support only the latest TLS, enhancing the MQTT hardware login handler with null checks and increasing pool sizes. They also fixed OTA issues and modified sync commands and multipin widgets. Additionally, they extended the redeem class and removed old code.
unsupportedblynkdiscontinued
blynkkk/blynk-library
Mar 2015 - Apr 2018
Blynk library for IoT boards. Works with Arduino, ESP32, ESP8266, Raspberry Pi, Particle, ARM Mbed, etc.
Role in this project:Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:101 commits, 11 PRs, 97 pushes in 3 years 2 months
Contributions summary:Dmytro primarily contributed to the documentation and example code within the Blynk library, focusing on improving the clarity and usability of serial communication examples. They added and refined instructions for using the serial bridge, clarifying the location and usage of the serial script. The user also added new examples for widgets such as Email, Push Notifications, and TimeInput, expanding the library's functionality. Furthermore, the user made updates to existing examples, including the addition of a simple mode for the LCD widget.
rp2040nrf52argonesp8266-arduinobluetooth-low-energy
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