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Yurii Dubynka
Java Technical Lead / SRE

Profile Details
Over 10+ years of commercial experience in Java, and more than Kyiv, Ukraine
7 years of cross-department team management, helping projects [open contact info](look above in the "contact info" section)
grow from the ground up to sustainable operations. As a Technical
Lead, I was actively involved in day-to-day activities such as software Links
development, code reviews, addressing architectural and design gaps, https://github.com/dgroup
investigating performance issues, managing the team, and mentoring
engineers. I am adept at getting things done. I have also published Skills
several open-source projects and libraries on Maven Central (Java), English (B2)
rubygems.org (Ruby), and pypi.org (Python).
Java 21, SE/EE

Spring Boot, Quarkus
Employment History
Open API, REST, SOAP, NATS
Java Technical Lead/SRE at Ciklum, Kyiv, Ukraine
JetStreams
Dec 2021 — Present
Project: NDA (latest) OAuth2.0, OpenID, Keycloak

• Architect, design, and develop custom solutions (end-to-end: OpenTelementry, Grafana,
hardware, software, integration, security, etc., for the entire Prometheus, VictoriaMetrics,
solution delivery life cycle) OpenSearch, Tempo
• SRE activities: monitoring, alerting, and observability, Gradle, Maven, Docker,
maintaining service availability across distributed systems through ArgoCD
proactive incident response and capacity planning, IaC, GitOps
Gitlab CI/CD, GitHub Actions,
Technologies: Java 21, Kotlin, Quarkus, NATS JetStreams, OAuth2.0, Bitbucket, Jenkins
OpenID, Keycloak, TDD, junit5, OpenAPI, Gitlab CI/CD, Docker, ArgoCD,
Kubernetes (on-premise), OpenTelementry, Grafana, Prometheus, TDD, junit5, jacoco, mockito,
VictoriaMetrics, OpenSearch, Tempo, MongoDB, PostgreSQL pitest

Project: NDA Clean code, Static analysis,
PMD, Checkstyle, SonarQube,
• Mentorship and team management (5+ developers) Codacy, CodeCov
• Architect, design, and develop custom solutions for project,
program, and operational scope (end-to-end: hardware, software, Oracle RDBMS, PostgreSQL,
integration, security, etc., for the entire solution delivery life cycle) H2, MariaDB, MongoDB
• Fully automated CI/CD (GitOps), release management Google Container Platform,
process, including release notes generation with commits/features Kubernetes (on-premise),
references OpenShift (on-premise)
Technologies: Java 17, Spring Boot, Apache Camel, OAuth2.0, Atlassian Jira API, Confluence,
Keycloak, TDD, junit5, OpenAPI, GitHub (VCS, CI/CD, Actions), Docker, Crucible, Miro, Figma,
ArgoCD, Kubernetes (GCP) Mindgrammer, Mermaid,
Technical Project Manager at NetCracker, Kyiv, Ukraine Excalidraw, Draw.io, XMind
Jan 2020 — Dec 2021 OWASP, Nexus Sonatype,
• Architecture design, stress volume testing & production Harbor, Snyk.io, dependabot,
performance investigation maven-bom
• Mentorship and team management (30+ developers), made a
bot that helps to manage around 600+ project members on Jira
https://github.com/dgroup/lazylead (Ruby)
Technologies: Java 8, 11, Spring Boot, Docker, Eclipse Memory
Analyzer, jcmd, jmap, jstack, Java Flight Recorder, GitLab, Oracle
RDBMS, PostgreSQL, OpenShift

Java Technical Lead at NetCracker, Hyderabad, India
Jan 2017 — Jan 2020
• System architecture, design and development, stress volume
testing & production performance investigation
• Build a team from scratch (interview, hire, train, deploy) to handle
projects from EMEA, LATAM and APAC

Technologies: Java 8, 11, Java EE, Oracle WebLogic, Spring Boot, 100+
frameworks, Oracle RDBMS, PostgreSQL, Oracle, Linux

Java Developer/Team Lead at NetCracker, Sumy, Ukraine
Aug 2012 — Jan 2017
• Software development based on Java 8, Oracle, Java
EE/WebLogic, 100+ frameworks, data integrity issues resolution
• Support, design and development of end-to-end operation
process, troubleshooting, customer relationship management
• Mentorship and team management (3+ developers)

Technologies: Java 8, Java EE, EJB, Oracle WebLogic, Spring Boot,
REST, SOAP, TDD, SQL, SQL tuning, GitLab, Docker, Oracle RDBMS,
PostgreSQL, OpenShift (on-premise), Linux

Senior assistant (Education Center) at Sumy State University,
Sumy, Ukraine
May 2012 — Sep 2012
• Design and development of Java-based simulators for students
• Regular IT support

Technologies: Java, Swing GUI, JavaScript

Education
Specialist of Computer Science, Sumy State University
2013 — 2014
Programming

Bachelor of Computer Science, Sumy State University
2009 — 2013
Programming

Courses
OAuth 2.0 in Spring Boot Applications, Udemy
Oct 2025

Building Microservices with Quarkus, Udemy
May 2025

Grafana, Udemy
Mar 2025