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Tomáš Koscielniak

PROFILE

Tomáš Koscielniak

Over the past 17 months, this developer delivered robust CI/CD, test automation, and feature enhancements across osbuild/image-builder-frontend and osbuild-composer. They engineered end-to-end Playwright test suites, expanded API surfaces for distribution metadata, and streamlined image creation workflows, focusing on RHEL compatibility and compliance. Their work included integrating OpenStack and Terraform, refining Slack alerting, and modernizing CI pipelines using TypeScript, Go, and Shell scripting. By aligning test infrastructure with current RHEL releases and improving frontend UX in React, they reduced flakiness, accelerated feedback, and enabled reliable, maintainable releases, demonstrating depth in backend, DevOps, and frontend engineering across multiple repositories.

Overall Statistics

Feature vs Bugs

83%Features

Repository Contributions

103Total
Bugs
10
Commits
103
Features
48
Lines of code
761,841
Activity Months17

Work History

April 2026

7 Commits • 5 Features

Apr 1, 2026

April 2026 (2026-04) — Frontend: osbuild/image-builder-frontend delivered five focused updates to simplify workflows, improve UX, and reduce maintenance. Key outcomes: - Cleanup: Removed AWS sources integration from UI, utilities, and API configurations (commit 8c83c3bacd85b9d2227c4134e32c018e409ac9d1). - AWS Wizard UX Enhancement: Side-by-side Account ID and Default region fields with helper text (commit 1154a0abbbed362d884a6f758ac3660854d894a5). - AAP Registration Integration in Create Image Wizard: Moved AAP to Registration and updated tests (commits fef3d906a16cfcdbc1fcbbd65fd683e5ff8e878f, 363105e87c71bcb218799dcfdef65ec896c756f3, 08865a0ef100a6bfcea23c066ad6b777a8e6c276). - Login flow improvements: Faster login retry with direct error-state handling and streamlined cookie-consent dismissal (commit 8cf72163e2a329dc2dbce6de727b18cecbc90297). - GCP: Removed Share with Lightspeed option; removed dead code (commit 1de81b440ca798317435b2a72921d5dae6c5d29a). Impact and skills: Simplified codebase, faster login, streamlined image creation flows, and healthier test alignment. Technologies demonstrated: React frontend, Vitest, Playwright, UI/UX refinements, and test maintenance.

March 2026

9 Commits • 3 Features

Mar 1, 2026

March 2026 delivered meaningful business value through reliability, usability, and quality improvements across image-building platforms. Key features and fixes include a runtime compatibility fix for Oapi-codegen, frontend wizard enhancements with AWS/GCP validators and a streamlined cloud configuration flow, UI revamps for services and labeling, and substantial test infrastructure upgrades to stabilize CI and reduce flakiness. These changes reduce build errors, accelerate image creation, and improve compliance readiness with OpenSCAP labeling.

February 2026

7 Commits • 3 Features

Feb 1, 2026

February 2026 monthly summary focusing on delivering reliable CI, improvements to test automation, and API expansion across Osbuild projects. Delivered features and fixes that reduce alert noise, stabilize boot-test workflows, validate upgrades for the latest RHEL release, and extend distribution metadata coverage. These efforts accelerated feedback loops, improved automation reliability, and strengthened platform readiness for production releases.

January 2026

6 Commits • 2 Features

Jan 1, 2026

January 2026 monthly summary highlighting key features delivered, major bugs fixed, and overall impact. Across two repositories, delivered testing framework and UX improvements for image-builder frontend, plus a new data API surface in osbuild-composer to support client metadata discovery. Focused on reliability, maintainability, and business value through concrete, delivered artifacts.

November 2025

7 Commits • 4 Features

Nov 1, 2025

November 2025 monthly summary focusing on key accomplishments across all repositories. Business value delivered includes expanded deployment options with network-installer support, enhanced compliance testing reliability, and more reliable, observable CI pipelines.

October 2025

9 Commits • 3 Features

Oct 1, 2025

October 2025 highlights across osbuild/image-builder-frontend and osbuild/image-builder. Focused on delivering reliable test automation, smoother CI, and UX improvements while reducing maintenance overhead. Key outcomes: - Frontend: Playwright test infrastructure improvements and CI optimization, consolidating CI runs, increasing runner capacity, boot tests project isolation, PR-trigger refinements, and standardized test file extensions to reduce flaky tests. Commit references include f1b7136a9473a2d8a8b3f6cb8d23ed059ee9c614; 36893ddb09efbb284d3cd2b1d83aca4087e62ee5; a9dc1201becefb00935a8b323c04405136a1d59e; 27b9ad32abe51d457c08eadc43bee56a9c693aca; 9b450593066f7c76283e04a1d3eb626ed37ea43d; 037117304839211020ed15cc6f2a0896e58dee9f. - Backend/CI: Automatic status polling for Pending repositories in the image-builder wizard, reducing manual refresh and improving UX. Commit: 0e68e5dcd5fd06cd99616244369303bcbab3e97f. - Bug fix: Fix missing import for 'expect' in Playwright tests (imageBuilding.ts) to maintain test environment integrity. Commit: f28493ccb5731944a7e7626fe38920fb7f834c1a. - CI cleanup: Removed IQE triggers and the associated PR check script to reduce CI maintenance overhead. Commit: 721991fe3001548e06b1031730a4f87e84c618d9. Overall impact and accomplishments: - Improved reliability and speed of CI/test cycles, enabling faster feedback for code changes. - Enhanced user experience in image-builder wizard through automated status checks. - Reduced CI maintenance burden by stripping obsolete IQE infrastructure. Technologies and skills demonstrated: - Playwright, TypeScript, and Playwright test maintenance - CI/CD optimization and large-scale runner orchestration - Test infrastructure design, project isolation, and reliability improvements - Change management and impact-focused communication

September 2025

15 Commits • 4 Features

Sep 1, 2025

September 2025: Delivered substantial improvements to image-builder across frontend and backend, focusing on policy governance, test infrastructure, and CI/CD efficiency. Highlights include expanded policy management, robust test utilities, OpenSCAP tailoring integration, and streamlined CI/CD setup to improve reliability and time-to-feedback for compliance workflows.

August 2025

7 Commits • 5 Features

Aug 1, 2025

August 2025 monthly summary for osbuild/image-builder-frontend: Delivered end-to-end Playwright boot tests for qcow2 images with OpenStack integration, including RHOS wrapper and image lifecycle helpers. Implemented console logging in test helpers to aid debugging and refined Playwright reporting to avoid duplicate CI output while retaining useful local logs. Strengthened CI/build readiness with OpenStack CLI and SSH key provisioning, and updated the nightly CI workflow to run on weekdays at midnight with Slack notifications and improved error signaling. These efforts increased test coverage, reproducibility, and visibility of nightly runs, accelerating feedback on image builds and OpenStack interactions.

July 2025

5 Commits • 2 Features

Jul 1, 2025

Concise monthly summary for 2025-07 focused on delivering business value and technical accomplishments for the osbuild/osbuild-composer workstream.

June 2025

8 Commits • 5 Features

Jun 1, 2025

June 2025 performance summary: Implemented CI and test stability improvements across three OSBuild repos, aligning CI with current RHEL releases, centralizing authentication in Playwright tests, and hardening UI/API test reliability. The work reduces flaky tests, speeds debugging, and improves release readiness.

May 2025

4 Commits • 1 Features

May 1, 2025

May 2025: In the osbuild-composer project, delivered targeted CI improvements and stability fixes to accelerate onboarding, strengthen PR validation, and ensure cross-distro compatibility. Key work includes adding an SSH key for a new team member and introducing a nightly RHEL 10 tests pipeline on PRs to improve CI reliability, fixing a CI regression baseurl issue for RHEL 9.7/10.1, and resolving cross-distro test failures by correcting Go module version parsing for osbuild/images (including pseudo-versions with alphanumeric characters and hyphens).

April 2025

3 Commits • 1 Features

Apr 1, 2025

April 2025 — osbuild/image-builder-frontend: Key focus on test automation reliability and CI efficiency. Key features delivered: Playwright test suite enhancements including upgrading to Playwright 1.51.1, enabling step.skip, and introducing parallel test execution with scaled CI workers; provisioning a large AWS CI build instance to support faster, more stable tests. Major bugs fixed: none reported this month. Overall impact: improved feedback loop, reduced test runtime, and more stable frontend tests enabling faster iteration on user-facing improvements. Technologies demonstrated: Playwright 1.51.1, test parallelization, CI scaling, AWS CI infrastructure, and test optimization.

March 2025

7 Commits • 4 Features

Mar 1, 2025

March 2025 monthly summary focusing on delivering CI reliability, expanded OS support in CI, and enhanced test automation across four repositories. The work improved stability for nightly pipelines, introduced snapshot-based testing for repository management, broadened RHEL coverage in CI, and refined Playwright workflows for faster feedback and higher test reliability.

February 2025

2 Commits • 2 Features

Feb 1, 2025

February 2025: Targeted alerting and CI stability across two repos. Implemented Slack notification tagging by pipeline status to reduce alert noise for successful runs and ensure only failed pipelines trigger notifications to specific users; upgraded CI base image to RHEL 9.5 with corresponding GitLab CI config updates and removal of legacy repo definitions to ensure tests run on the current base image. Result: shorter triage times, higher signal quality, and more reliable CI/test results.

January 2025

2 Commits • 2 Features

Jan 1, 2025

Month: 2025-01. Focused on strengthening upgrade validation paths for RHEL and stabilizing VMware integration tests in CI. Delivered alignment of upgrade tests to reflect 9.6 to 10.0 requirements, updated test scripts and URL sources; re-enabled VMware integration tests on RHEL 10 using vCenter 8 and updated hardware cluster to resolve compatibility issues. These changes improve test coverage, reduce risk of upgrade failures in production, and demonstrate solid automation, scripting, and virtualization skills.

December 2024

1 Commits

Dec 1, 2024

December 2024: Stabilized the RHEL 10 nightly composition workflow for osbuild/osbuild-composer by fixing the compose URL to point to the nightly build, ensuring reliable pipeline runs and correct nightly artifacts.

November 2024

4 Commits • 2 Features

Nov 1, 2024

Performance summary for 2024-11: Focused on building robust nightly-build validation and cross-repo CI alignment for osbuild/osbuild and osbuild-composer. Key features delivered include RHEL 9.6 nightly RPM build support in osbuild through updated GitLab CI with 9.6 runners and Schutzfile configuration, alignment of manifests to 9.6 nightly builds, removal of references to 9.5 nightly runners, and CI/CD tweaks to enable nightly development versions. In osbuild-composer, introduced RHEL nightly build CI integration to test against 9.6 and 10 nightly builds, updating CI rules, runners, distro references, and dependencies (OSBuild and Terraform). Committed changes include ff0cd854c88de900e4fe62c8a0f24cbe2f2317ed, 9b66ad812380847557aa9911efd7af2d57ad8084, d8295ea2eabbcd2424d93878d83c62ceaa59d8c1, and f5a5705b7e890167b3739b2f3adf5cafa65c6e28. Major bugs fixed: none explicitly reported; efforts focused on CI/pipeline improvements and nightly-building infrastructure. Overall impact: faster, safer validation of upcoming RHEL/dev releases, reduced maintenance of legacy nightly references, and better confidence in release readiness. Technologies/skills demonstrated: GitLab CI, Schutzbot/Schutzfile, RHEL nightly streams, OSBuild/osbuild-composer integration, Terraform dependencies, manifests management.

Activity

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Quality Metrics

Correctness92.8%
Maintainability90.8%
Architecture88.8%
Performance87.8%
AI Usage21.4%

Skills & Technologies

Programming Languages

BashGoJSONJavaScriptMarkdownPythonShellTextTypeScriptYAML

Technical Skills

API DevelopmentAPI IntegrationAPI TestingAPI integrationAuthenticationAutomationBackend DevelopmentBuild AutomationBuild SystemsCI/CDCloud ComputingCloud InfrastructureConfiguration ManagementDependency ManagementDevOps

Repositories Contributed To

5 repos

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

osbuild/image-builder-frontend

Mar 2025 Apr 2026
11 Months active

Languages Used

JavaScriptShellTypeScriptYAMLPythonMarkdown

Technical Skills

CI/CDDevOpsEnd-to-End TestingEnd-to-end testingEnvironment ConfigurationFrontend Development

osbuild/osbuild-composer

Nov 2024 Feb 2026
11 Months active

Languages Used

JSONYAMLShellPythonTextGobash

Technical Skills

Build SystemsCI/CDDependency ManagementSystem ConfigurationShell ScriptingTesting

osbuild/image-builder

Sep 2025 Mar 2026
5 Months active

Languages Used

GoBashYAMLJSON

Technical Skills

API IntegrationAPI TestingBackend DevelopmentGoMockingSystem Configuration

osbuild/osbuild

Nov 2024 Jun 2025
4 Months active

Languages Used

YAMLJSONShell

Technical Skills

Build SystemsCI/CDInfrastructure as CodeSystem AdministrationConfiguration ManagementDevOps

content-services/content-sources-frontend

Mar 2025 Mar 2025
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

Frontend DevelopmentPlaywrightTesting