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Maciej Barelkowski

PROFILE

Maciej Barelkowski

Over a 19-month period, contributed to core Camunda and bpmn-io repositories, building and maintaining features such as BPMN modeling enhancements, element template validation, and release automation. In camunda-modeler, delivered improvements like Task Testing, connection management, and secure artifact signing, while ensuring stability through dependency management and robust CI/CD workflows. Enhanced user experience by refining the properties panel and integrating Monaco for code editing. Leveraged JavaScript, TypeScript, and JSON Schema to implement dynamic BPMN task outputs, template validation, and UI updates. Prioritized maintainability and test reliability, coordinating cross-repo releases and documentation updates to support scalable, production-ready process automation tooling.

Overall Statistics

Feature vs Bugs

69%Features

Repository Contributions

368Total
Bugs
61
Commits
368
Features
135
Lines of code
85,750
Activity Months19

Work History

April 2026

2 Commits • 1 Features

Apr 1, 2026

April 2026: Focused maintenance and enhancement of bpmn-js-element-templates. Key outcomes include a robust validation messaging experience and alignment with upstream releases through a dependency upgrade. These changes improve modeler reliability and reduce user confusion when labels are missing.

March 2026

10 Commits • 6 Features

Mar 1, 2026

March 2026 monthly performance summary: delivered stability and reliability enhancements across core Camunda Modeler and BPMN tooling, expanded test coverage for template correlations and dynamic BPMN task outputs, upgraded key dependencies to improve stability, and strengthened CI/CD workflows. These efforts reduced flaky behavior, improved maintainability, and accelerated secure release cycles, delivering measurable business value through more robust tooling and faster iteration cycles.

February 2026

5 Commits • 2 Features

Feb 1, 2026

February 2026 monthly summary focused on feature delivery, stability and release engineering for the BPMN.js Properties Panel, with two releases and alignment efforts for Camunda Modeler integration. Key outcomes: - Delivered v5.52.0 with dependency bumps to @bpmn-io/properties-panel@3.36.0 and 3.40.0; fixed peerDependencies alignment to support component introduced in #1176; updated changelog and version. - Delivered major v6.0.0 of the BPMN.js Properties Panel (potential new features/improvements) with commit fc6f62171f7285cd221d78dbcd40317ba289c647. - Repository coordination and release hygiene: changelog maintenance, semantic versioning, and preparation for Modeler compatibility; camunda-modeler repo saw no code changes this month. - Technologies and skills demonstrated: dependency management, release engineering, changelog discipline, semantic versioning, and cross-repo collaboration.

January 2026

14 Commits • 7 Features

Jan 1, 2026

January 2026 monthly summary: Delivered targeted features, stability improvements, and testing enhancements across four repositories (camunda-modeler, bpmn-js-properties-panel, diagram-js, bpmnlint-plugin-camunda-compat). Highlights include streamlining release notes, enabling the properties panel by default for better accessibility, a crash fix via dependency upgrade, and new editing capabilities with cut shapes. Also improved test reliability with a macOS-specific test skip mechanism and a mock for the isMac global.

December 2025

19 Commits • 13 Features

Dec 1, 2025

December 2025 across the bpmn-io and Camunda codebases delivered meaningful business value through test stabilization, feature expansion for element templates, linting improvements, and substantial Modeler improvements. The work reduced release risk, improved user workflow, and strengthened model integrity while showcasing advanced tooling and collaboration across multiple repositories.

November 2025

15 Commits • 5 Features

Nov 1, 2025

November 2025 monthly summary: Stabilized development and release readiness through test reliability improvements, UX enhancements, and dependency maintenance across key Camunda BPM tooling. Focus areas included strengthening test pipelines, refining tooltip interactions, enabling signal-event templating, and aligning schemas with the latest Zeebe releases to reduce integration risk and accelerate delivery.

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

Correctness95.8%
Maintainability95.6%
Architecture93.6%
Performance93.2%
AI Usage20.2%

Skills & Technologies

Programming Languages

CSSHTMLJSONJavaJavaScriptMarkdownN/AShellTextTypeScript

Technical Skills

API DevelopmentAPI IntegrationApplication DevelopmentAzureBPMNBPMN LintingBPMN ModelingBPMN modelingBackend DevelopmentBug FixesBug FixingBuild ToolsCI/CDCSSCamunda

Repositories Contributed To

9 repos

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

camunda/camunda-modeler

Oct 2024 Mar 2026
17 Months active

Languages Used

YAMLCSSHTMLJavaScriptMarkdownN/ATypeScriptShell

Technical Skills

CI/CDGitHub ActionsBug FixesBuild ToolsCamunda ModelerChangelog Management

bpmn-io/bpmn-js-properties-panel

Nov 2024 Feb 2026
15 Months active

Languages Used

JavaScriptMarkdownYAMLN/AJSON

Technical Skills

Front-end DevelopmentJavaScriptDependency ManagementDocumentationNode.jsRelease Management

bpmn-io/bpmn-js-element-templates

Jan 2025 Apr 2026
11 Months active

Languages Used

JavaScriptMarkdownXMLTypeScriptJSON

Technical Skills

BPMNCode CleanupDocumentationFEELJavaScriptRefactoring

camunda/bpmnlint-plugin-camunda-compat

Nov 2024 Jan 2026
11 Months active

Languages Used

JavaScriptMarkdownN/AXMLJSON

Technical Skills

BPMNBPMN LintingCamundaDocumentationJavaScriptLinting

camunda/element-templates-json-schema

Jan 2025 Mar 2026
8 Months active

Languages Used

JavaScriptMarkdownShellJSONN/A

Technical Skills

Backend DevelopmentDocumentationPackage ManagementRelease ManagementSchema ValidationVersion Control

bpmn-io/diagram-js

Nov 2024 Mar 2026
6 Months active

Languages Used

JavaScriptMarkdownYAMLJSON

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