Hi all, I'm Sergey (Sergei) Chernov a.k.a. seregamorph

I'm a Software Engineer and Opensource Volunteer

• I live in the Netherlands and work at Miro
• Most of the experience is Java backend development and maintenance, last years dedicated to build tooling and Developer Productivity Engineering
• Also, I contribute to open source, write articles and do public speaking

Connect with me:

LinkedIn

Articles

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• Speed Up Your Maven Build x10… Before You Move to Gradle
  • JAVAPRO magazine
  • Habr (rus)
• Optimizing Spring Integration Tests at Scale
  • Baeldung
  • JAVAPRO maganize PDF (page 119)
  • JAVAPRO maganize Web
• Fluent setter: breaking the convention
  • JAVAPRO magazine PDF (page 35)
  • JAVAPRO magazine Web
  • Miro Engineering blog
• Simple release management with git Habr (rus)
• Refactoring legacy-project to Dependency Injection. Sith's way Habr (rus)
• CharSequence magic Habr (rus)
• Obtaining Method from Method Reference Habr (rus)
• Extension methods in Java Habr (rus)
• Obtaining generic type at runtime Habr (rus)

Public speaking

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• IntelliJ IDEA — The IDE That Changed Java Forever Documentary
• Speed Up Your Maven Build x10… Before You Move to Gradle [slides]
  • DPE Summit 2024 [recording] (hosted by Gradle Inc.)
  • JUG Amsterdam Meetup (hosted by Miro)
  • VoxxedDays Amsterdam 2025 [recording] (hosted by CodeLabJUG)
  • Devoxx Greece 2025 (hosted by SoftConf)
• Monolith Server Build Optimizations
  • JUG Amsterdam Meetup
  • Uber x Build Meetup
• Maven Turbo reactor DPE Summit 2025 [recording] [slides] (hosted by Gradle Inc.)
• Improving Spring Boot tests efficiency [slides]
  • Spring I/O 2025 [recording] (hosted by Broadcom)
  • YouTube (hosted by AtomicJar/TestContainers)
  • JUG Amsterdam Meetup (hosted by Adyen)
  • Voxxed Days Thessaloniki 2025 [recording] (hosted by The Java Community BV.)
• How to migrate the legacy project to Spring Boot Spring I/O 2026 [recording] [slides]
• Test Distribution with Maven JUG Amsterdam Meetup [slides]
• Discussing monorepos BuildPropulsionLab (hosted by Gradle Inc.)
• Fluent Setters in Java JugRu Meetup (hosted by JugRu/Miro)

Projects

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• spring-test-smart-context - Improving Spring Boot test efficiency
• maven-surefire-cached - Maven surefire/failsafe plugins supporting build caching
• maven-turbo-builder - Make Maven Turbo fast 🏎️
• maven-half-life-builder - ☢️ Maven reactor next level
• maven-timeline-extension - Maven Timeline combo
• test-distribution - Dynamic Test Distribution for Maven
• jvm-arch-maven-extension - Ensure JVM arch vs CPU arch
• rest-api-framework - build REST API with powerful testing based on Spring Boot
• hamcrest-more-matchers - additional Hamcrest matchers to verify collection order and extracted values
• morejdbc - helpers to call Oracle stored procedures/functions
• reactive-cassandra - extensions for reactive-style (a.k.a. Promise) Futures for cassandra driver 2.x
• binaryxml - own lightweight binary xml serialization library
• miro-app-oauth - sample OAuth application for Miro
• Morph3D Screen Saver - Screen Saver for Windows, it was very popular in the 2000s
• All personal repositories

Opensource contributions

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• pgjdbc
  • connectTimeout property support
• maven
  • Fix DefaultExceptionHandler NPE
• frontend-maven-plugin
  • Self repairing in case of corrupted state
  • Support arm64 binaries since Node.js v16
• hibernate-orm
  • Order.reverse() contract strict following
  • Order.reverse() contract strict following backport
• jackson-databind
  • Fix default CharSequence serialization
• IntelliJ IDEA Community Edition
  • Fix maven import for non-case sensitive unique artifactId
• spring-framework
  • Optimize context caching in the TestContext framework [open]
  • Add missing @Deprecated(forRemoval = true)
  • AbstractMockHttpServletRequestBuilder#param does not allow null [open]
  • Reset mocks only when testContext.hasApplicationContext
• springdoc-openapi
  • Fix SpringDocHateoasConfiguration conditions
• gradle
  • Expose BuildCacheKey to task execution [open]
• groovy
  • GROOVY-11541: Sql wildcard params
• dependency-management-plugin
  • dependencyManagement task is eagerly created
• dependency-analysis-gradle-plugin
  • Reason explanation id ambiguity
  • Caching issues for included builds [open]
  • Fix incomplete reason explanation on multi capabilities
  • artifactsReport granular cache inputs [open]
  • Print build path in projectHealth
  • Sort output of graphView and findDeclarations
• easy-random
  • Repeatable random object
  • Generic field type issue (composition)
• commons-beanutils
  • BEANUTILS-541 - Fix FluentPropertyBeanIntrospector
• github-api
  • user, push, pull event extensions
  • pullRequestReview.review.htmlUrl
  • Base event payload
  • pull_request action "edited".changes
• undertow
  • Path template matched parameters should keep order
• testng
  • Failsafe reports (Exception)
  • Failsafe reports (parameter)
• hamcrest
  • java.util.Optional matchers
• rsocket-java
  • Fix build for Apple M1
• micronaut
  • Fix gradlew/mnvw generation
• quarkus
  • Fix gradlew/mnvw generation
• spring-test-profiler
  • Fix single registerSingleton
• All pull requests

Bug hunting

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• JetBrains
  • all projects
• Various GitHub projects
  • all projects