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Maciej Barelkowski

PROFILE

Maciej Barelkowski

Maciej Barelkowski engineered core features and stability improvements across the Camunda ecosystem, focusing on camunda-modeler and related BPMN tooling. He delivered enhancements such as Task Testing, robust element template validation, and multi-tenant deployment support, using JavaScript, TypeScript, and JSON Schema. In camunda-modeler, Maciej upgraded release pipelines, improved UI responsiveness, and integrated Monaco for code editing, addressing both developer experience and production reliability. His technical approach emphasized maintainable code, automated CI/CD, and comprehensive test coverage. The depth of his work is reflected in cross-repo coordination, schema evolution, and release engineering, resulting in safer upgrades and accelerated delivery cycles.

Overall Statistics

Feature vs Bugs

66%Features

Repository Contributions

303Total
Bugs
51
Commits
303
Features
101
Lines of code
36,710
Activity Months13

Work History

October 2025

24 Commits • 10 Features

Oct 1, 2025

October 2025 performance highlights: Delivered meaningful feature upgrades, stability fixes, and release-readiness across the Camunda ecosystem. The work emphasized business value by improving test reliability, expanding configuration support, and aligning documentation with UI changes, enabling safer upgrades for customers and faster release cycles.

September 2025

32 Commits • 11 Features

Sep 1, 2025

September 2025 delivered robust performance and compatibility enhancements across key Camunda tools. Notable features include linter template caching to reduce redundant validation, expanded ActiveElementsCollection support for zeebe:adHoc elements and templates, and the introduction of elementTemplates.getCompatible API. We also shipped a Camunda Cloud lint rule for no-interrupting-event-subprocess with corrected violation reporting, plus Camunda Modeler improvements including REST API Start Instance fix and a new Task Testing capability. Ongoing health and security updates, JSON schema version bumps, and core dependency upgrades (e.g., bpmn-js 18.6.4) improved stability and compatibility downstream. These efforts collectively improve performance, developer productivity, and platform reliability.

August 2025

14 Commits • 5 Features

Aug 1, 2025

August 2025 monthly summary: Across three repositories, delivered significant Zeebe integration, enhanced AdHocSubProcess capabilities, and stabilized the codebase through dependency upgrades and quality fixes. Key outcomes include upgraded validation alignment with 2.9.x, new Job Worker and output configuration features for AdHocSubProcess, and multiple dependency bumps in BPMN moddle to keep the stack current. Also improved test output clarity and released version 2.39.1 with changelog updates.

July 2025

38 Commits • 12 Features

Jul 1, 2025

July 2025 performance snapshot across six core Camunda repositories, delivering significant feature work, stability improvements, and developer experience enhancements that reduce onboarding friction, strengthen validation, and enable multi-tenant deployments. The month included cross-repo releases, UI/UX improvements, testing infrastructure upgrades, and release hygiene that collectively advance product reliability, scalability, and time-to-value for customers and contributors.

June 2025

24 Commits • 7 Features

Jun 1, 2025

June 2025 monthly summary highlights: In June 2025, the team focused on release readiness, stability, and documentation accuracy across Camunda Modeler and related projects, aligned with the 5.36.x release cycle. The work delivered strengthens business value through faster, safer deployments, improved UI responsiveness, and clearer, validated templates and settings. Key features delivered: - camunda/camunda-modeler: Release readiness for 5.36.x, including release candidates, version bumps, and dependency/notice updates to prepare 5.36.x releases; delivered and tracked RCs and final releases (v5.36.0, v5.36.1) and updated THIRD_PARTY_NOTICES. - camunda/camunda-modeler: Settings API enhancement to return registered values and support pre-registration subscriptions for settings, enabling proactive configuration validation. - bpmn-io/bpmn-js-properties-panel: Debounce fix to improve responsiveness, upgrading to @bpmn-io/properties-panel@3.29.1. - bpmn-io/bpmn-js-element-templates: Templates improvements including disabling default Camunda user task implementation to address issue #159 and enhancements to reuse existing bpmn:FormalExpression for property updates, plus tests for integer/boolean properties and scientific notation support. - camunda/element-templates-json-schema and related docs: Release readiness and version updates for element-templates-json-schema packages; FEEL validation enforcement for specific BPMN expressions with new tests; documentation and changelog updates. - camunda/camunda-docs-manual and camunda/camunda-docs-static: Documentation updates with Modeler v5.36 UI screenshots to reflect changes across guides and quick-start content. Major bugs fixed: - Robust FEEL popup rendering tests and related stability improvements in the properties panel area to reduce flakiness. - Consolidated bug fixes in the 5.36.1 stability bundle affecting properties panel, deployment, and instance execution; ensured proper tenant handling for basic auth self-managed deployments. - Templates and FEEL validation fixes including enforcement of FEEL for certain expression properties and template property handling improvements. Overall impact and accomplishments: - Reduced release risk and accelerated go-to-market for Modeler with a well-tracked 5.36.x cycle. - Increased UI responsiveness and stability of the properties panel, delivering a smoother user experience for modelers. - Improved template validation and settings reliability, reducing configuration errors in production deployments. - Documentation accurately reflects UI changes, enabling clearer onboarding and support materials. Technologies/skills demonstrated: - Release engineering, dependency/version management, and changelog discipline. - Front-end stability improvements (debounce fixes, test robustness). - Settings configuration enhancements and pre-registration handling. - Template and FEEL validation, with emphasis on data integrity and correct rendering. - Cross-repo coordination and documentation governance.

May 2025

22 Commits • 8 Features

May 1, 2025

May 2025 delivered security, stability, and release-readiness across Camunda’s modeler and BPMN tooling, with focused work in CI, defaults management, RPA deployment, and BPMN expression features. The month emphasized business value through secure artifact signing, up-to-date default configurations, enhanced UX stability, expanded deployment capabilities, and robust maintenance for upcoming releases.

April 2025

14 Commits • 6 Features

Apr 1, 2025

During 2025-04, delivered notable features across camunda-modeler, docs manual, and bpmn-io projects, focusing on business value, reliability, and usability. Key achievements include implementing RPA Script Support in File Context and a macOS-only Settings Menu for platform-consistent UX. Release readiness and maintenance updates ensured a smoother release with updated dependencies, versioning, and CI enhancements. Documentation improvements in Element Templates and TTL visuals improved discoverability and configuration usability. Fixture/CI tests expanded to verify subprocess icon integration and exporter compatibility, strengthening test coverage and quality assurance. Technologies leveraged include TypeScript/JavaScript, CI/CD automation, documentation standards, and cross-repo collaboration.

March 2025

23 Commits • 9 Features

Mar 1, 2025

March 2025 performance summary: Delivered release-process stabilization, security hardening, and resource management improvements across camunda-modeler and related repositories. Implemented UI/Rendering enhancements and reinforced test reliability, while laying groundwork for BPMN workflow flexibility in ad-hoc subprocess scenarios. Coordinated RC readiness, changelog updates, and tooling stabilization to accelerate safe releases and reduce risk in production deployments.

February 2025

18 Commits • 4 Features

Feb 1, 2025

Concise February 2025 monthly summary across repositories: camunda/camunda-docs, camunda/camunda-modeler, bpmn-io/bpmn-js-properties-panel, camunda/bpmnlint-plugin-camunda-compat. Focus on business value and technical achievements with concrete deliveries and commit references.

January 2025

35 Commits • 14 Features

Jan 1, 2025

January 2025 monthly review: Delivered a set of features, stability improvements, and foundational enhancements across Camunda Modeler and related documentation repos. Focused on upgrading workflows to Camunda 8, enhancing documentation and release processes, and strengthening CI/CD and template ecosystems. The work reduces upgrade friction, improves developer UX, and accelerates time-to-value for users.

December 2024

24 Commits • 7 Features

Dec 1, 2024

December 2024 monthly performance: reliability, release-readiness, and business impact across Camunda Modeler and related tooling. Key features include dependencies upgrades and user task enhancements in Camunda Modeler, the 5.31.0 release with element template runtime, FEEL improvements, and a document preview component; automated Slack release notifications; and release governance improvements (RC marking, release checklist, and notices). Major bugs fixed include enabling CI milestone creation via GH_TOKEN, correcting the run instance link in the Operate UI, FEEL parsing fixes with camunda-bpmn-js, and documentation consistency across changelogs and release notes; audit warnings addressed. Business impact: faster, more reliable releases; improved developer experience and navigation; stronger security/maintainability; clearer stakeholder communications. Technologies demonstrated: GitHub Actions, CI/CD, Node.js dependency management, Camunda BPMN-JS/FEEL parsing, release automation, and documentation governance.

November 2024

34 Commits • 8 Features

Nov 1, 2024

November 2024 monthly summary focused on delivering business value through targeted features, stability fixes, enhanced CI/CD automation, and comprehensive release/documentation work across BPMN tooling. The work spanned bpmn-js-properties-panel, diagram-js, camunda-modeler, camunda-docs, and bpmnlint-plugin-camunda-compat, driving reliability, faster releases, and clearer user guidance.

October 2024

1 Commits

Oct 1, 2024

Monthly work summary focusing on key accomplishments for 2024-10; primarily a critical CI/CD reliability fix in camunda/camunda-modeler.

Activity

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Quality Metrics

Correctness95.0%
Maintainability95.2%
Architecture92.8%
Performance92.2%
AI Usage20.2%

Skills & Technologies

Programming Languages

CSSHTMLJSONJavaJavaScriptMarkdownN/AShellTextTypeScript

Technical Skills

API DevelopmentAPI IntegrationApplication DevelopmentAzureBPMNBPMN LintingBPMN ModelingBackend DevelopmentBug FixesBug FixingBuild ToolsCI/CDCSSCamundaCamunda BPMN

Repositories Contributed To

9 repos

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

camunda/camunda-modeler

Oct 2024 Oct 2025
12 Months active

Languages Used

YAMLCSSHTMLJavaScriptMarkdownN/ATypeScriptShell

Technical Skills

CI/CDGitHub ActionsBug FixesBuild ToolsCamunda ModelerChangelog Management

bpmn-io/bpmn-js-properties-panel

Nov 2024 Oct 2025
11 Months active

Languages Used

JavaScriptMarkdownYAMLN/A

Technical Skills

Front-end DevelopmentJavaScriptDependency ManagementDocumentationNode.jsRelease Management

camunda/bpmnlint-plugin-camunda-compat

Nov 2024 Oct 2025
9 Months active

Languages Used

JavaScriptMarkdownN/AXML

Technical Skills

BPMNBPMN LintingCamundaDocumentationJavaScriptLinting

bpmn-io/bpmn-js-element-templates

Jan 2025 Sep 2025
7 Months active

Languages Used

JavaScriptMarkdownXMLTypeScript

Technical Skills

BPMNCode CleanupDocumentationFEELJavaScriptRefactoring

camunda/element-templates-json-schema

Jan 2025 Oct 2025
5 Months active

Languages Used

JavaScriptMarkdownShellJSONN/A

Technical Skills

Backend DevelopmentDocumentationPackage ManagementRelease ManagementSchema ValidationVersion Control

bpmn-io/diagram-js

Nov 2024 Sep 2025
2 Months active

Languages Used

JavaScriptMarkdownYAML

Technical Skills

CI/CDDocumentationGitHub ActionsJavaScriptRegular ExpressionsSVG Path

camunda/camunda-docs-manual

Jan 2025 Oct 2025
5 Months active

Languages Used

Markdown

Technical Skills

DocumentationContent RestructuringTechnical Writing

camunda/camunda-docs

Nov 2024 Jul 2025
4 Months active

Languages Used

Markdown

Technical Skills

Documentationdocumentation managementTechnical Writing

camunda/camunda-docs-static

Jan 2025 Oct 2025
3 Months active

Languages Used

No languages

Technical Skills

documentationDocumentation

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