Viacheslav Kolybelkin
Senior Java Developer at PashaPay
Baku Ekonomic Zone, Azerbaijan
Summary
👤
Senior🎓
Top SchoolViacheslav Kolybelkin is a Senior Java Developer with over a decade of experience designing and delivering high-performance backend systems and microservices using Java and Kotlin. He combines hands-on coding, performance tuning and testing with team leadership and agile delivery, having led migrations to reactive architectures (Spring WebFlux) and implemented resilient protocols like reactive Thrift with Project Armeria. His background spans fintech and enterprise domains—building FIX routing, low-latency market feeds, Kafka-based reporting, and secure APIs—while also owning L3 support and release automation. Oracle-certified in Java SE 8, he has repeatedly modernized legacy stacks (PHP→React/Kotlin) and introduced infrastructure like Keycloak and Camunda for secure, auditable workflows. Notably, he balances deep systems-level profiling (JMC, VisualVM, perf) with product-focused feature delivery, often tackling testing challenges for custom transports using Spock/Groovy. Based in Azerbaijan, he brings a pragmatic blend of performance-conscious engineering and operational ownership.
11 years of coding experience
11 years of employment as a software developer
School of Electrical and Mechanical Engineering, Automation science and engineering, School of Electrical and Mechanical Engineering, Automation science and engineering at Saratov State Technical University
English
Stackoverflow
55reputation
14kreached
0answers
5questions
Github Skills (59)
eclipse-collections10
immutable-collections10
mdp10
sampling10
java10
data-handler10
perf10
java-collections10
fixprotocol10
collections10
eclipse10
fluent-api10
forex-trading10
functional9
cpu9
Programming languages (5)
Github contributions (5)
epam/java-cme-mdp3-handler
Apr 2017 - Sep 2018
Java Market Data Handler for CME Market Data (MDP 3.0)
Contributions:56 commits, 11 PRs, 1 push in 1 year 5 months
fixprotocolcmemdpforex-tradingdata-handler
kolybelkin/java-cme-mdp3-handler
Jan 2018 - Jan 2018
Contributions:1 release, 1 commit, 6 PRs in 1 day
cmemdpdata-handlerjavahandler
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