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Sergii Masiuk

PROFILE

Sergii Masiuk

Sergii Masiuk engineered and maintained core DevOps infrastructure for the folio-org/pipelines-shared-library repository, focusing on CI/CD pipeline modernization, Kubernetes upgrades, and automated testing reliability. He upgraded EKS clusters, implemented disaster recovery for Jenkins, and introduced programmatic namespace management using Groovy and Terraform. Sergii enhanced deployment stability by extending readiness timeouts, integrating health checks, and refactoring Jenkins pipelines with PodTemplates. He addressed critical bugs, such as user UUID generation and image repository misconfigurations, while aligning documentation with evolving project states. His work demonstrated depth in infrastructure as code, configuration management, and backend development, resulting in more reliable, maintainable deployment workflows.

Overall Statistics

Feature vs Bugs

68%Features

Repository Contributions

36Total
Bugs
6
Commits
36
Features
13
Lines of code
1,930
Activity Months7

Work History

May 2025

1 Commits • 1 Features

May 1, 2025

May 2025 monthly summary for folio-org/pipelines-shared-library. Delivered a feature upgrade upgrading Kubecost chart to 2.7.1 and added resource requests/limits for kubecostAggregator to leverage latest features and improve performance. Ensured deployment uses the latest stable Kubecost version within the Rancher environment, reducing drift and improving cost visibility. No major defects fixed this period; focus was on stability and alignment with platform governance.

April 2025

6 Commits • 1 Features

Apr 1, 2025

April 2025 monthly summary for folio-org/pipelines-shared-library focused on reliability, provisioning, and stabilization of automated operations. Delivered a CI/CD pipeline modernization with PodTemplates and RDS-based provisioning for namespaces, improving deployment orchestration and UI deployment integration. Extended nightly test timeout to reduce flaky failures, enhancing overall release stability. Implemented a robust fix for user UUID generation in createUser Job by ensuring the setter is used to assign UUIDs, preventing duplicates/incorrect IDs. Temporarily disabled the parameterizedCron-based scheduled pod stop/start automation to halt problematic automated operations while a broader resolution is pursued. These changes collectively reduce deployment risk, improve provisioning accuracy, and stabilize automation workflows, delivering tangible business value through more reliable releases and consistent user provisioning.

March 2025

12 Commits • 3 Features

Mar 1, 2025

March 2025 monthly summary focusing on key accomplishments, with emphasis on business value and technical achievements across two repositories. Delivered infrastructure upgrades, expanded the application portfolio, modernized CI/CD pipelines, and kept documentation in sync with project state. Resulted in improved deployment stability, faster feature delivery, and easier maintainability across pipelines and apps.

February 2025

5 Commits • 2 Features

Feb 1, 2025

February 2025 performance highlights: Delivered reliability improvements, expanded test coverage, and CI modernization for folio-org/pipelines-shared-library. Key changes include increasing deployment readiness timeout to 30 minutes to reduce false timeouts; introducing nightly Eureka Karate tests and updating tests to master-eureka branch with Kong-domain Okapi URL; upgrading CI pipelines to Java 21 agent with updated Jenkinsfiles, Groovy scripts, constants, and common agent lists, enabling modern runtime and dependency compatibility. These efforts improve deployment reliability, regression detection, and build stability, delivering business value through faster, safer releases.

January 2025

5 Commits • 2 Features

Jan 1, 2025

January 2025 summary for folio-org/pipelines-shared-library: Delivered reliability improvements in the Rancher deployment pipeline, fixed critical OpenSearch image reference issues, and introduced programmatic Kubernetes namespace metadata management. The work reduced deployment failures, shortened time-to-deploy, and enhanced configurability across environments.

December 2024

5 Commits • 3 Features

Dec 1, 2024

December 2024 monthly summary for folio-org/pipelines-shared-library. Focused on increasing Jenkins deployment reliability, stabilizing development/testing environments, and ensuring CI/CD deployments are verifiably healthy before progressing. Delivered capabilities for disaster recovery, upgrade workflows, deterministic startup behavior in dev/test, and deployment health checks to reduce runtime failures.

November 2024

2 Commits • 1 Features

Nov 1, 2024

Delivered critical platform updates in November 2024 to enhance testing throughput and strengthen resource lifecycle safety for pipelines-shared-library. Key features delivered: EKS clusters upgraded to Kubernetes 1.29 and testing capacity expanded from 4 to 6 nodes to align with newer Kubernetes versions and boost test throughput (commit 2c3ad1922be3ca176b95e52a2b3099af6246859c). Major bugs fixed: Hardened Terraform destroy process by ensuring Rancher2 resources are destroyed before other resources and refining state removal, using explicit depends_on and state management improvements (commit 62a2eedfb468cfa4c1cc8a2388c29276be60e3b2). Overall impact: reduced risk of resource leakage during destroys, improved infrastructure stability, and faster, safer upgrade/test cycles. Technologies/skills demonstrated: Kubernetes/EKS, Terraform, Rancher2, infrastructure as code, resource lifecycle management, and state handling.

Activity

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Quality Metrics

Correctness88.0%
Maintainability89.4%
Architecture87.8%
Performance77.2%
AI Usage20.0%

Skills & Technologies

Programming Languages

GroovyHCLJSONJavaJenkinsfileMarkdownTerraformYAMLgroovyyaml

Technical Skills

AWSAutomated TestingBackend DevelopmentCI/CDCloud EngineeringConfiguration ManagementDevOpsDocumentationDocumentation ManagementGroovyGroovy ScriptingInfrastructure ManagementInfrastructure as CodeJava DevelopmentJenkins

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

folio-org/pipelines-shared-library

Nov 2024 May 2025
7 Months active

Languages Used

GroovyHCLTerraformMarkdownYAMLyamlJSONJava

Technical Skills

DevOpsInfrastructure as CodeKubernetesTerraformAWSCI/CD

folio-org/app-platform-complete

Mar 2025 Mar 2025
1 Month active

Languages Used

Markdown

Technical Skills

Documentation Management

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