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Jarek Danielak

PROFILE

Jarek Danielak

Over 20 months, this developer delivered core features and stability improvements across the Camunda Modeler and BPMN tooling ecosystem, including repositories like camunda-modeler and bpmn-js-element-templates. They engineered extensible plugin APIs, modernized testing by migrating to React Testing Library, and enhanced UI/UX with direction-aware resizing and accessibility updates. Their work included robust API development, schema validation, and integration of AI agent promotion, using JavaScript, React, and JSON Schema. By focusing on configuration management, error handling, and release automation, they improved developer velocity and product reliability, while maintaining comprehensive documentation and test coverage to support evolving business and user needs.

Overall Statistics

Feature vs Bugs

78%Features

Repository Contributions

307Total
Bugs
31
Commits
307
Features
112
Lines of code
563,966
Activity Months20

Work History

April 2026

4 Commits • 1 Features

Apr 1, 2026

April 2026 monthly summary focusing on delivering business value across two core BPMN tooling repos: bpmn-js-element-templates and diagram-js. Key outcomes include stability improvements for FEEL input behavior, and UX enhancements with direction-aware shape resizing. Work included test coverage, dependency updates, and release-oriented changes to reflect new features.

March 2026

12 Commits • 2 Features

Mar 1, 2026

March 2026 monthly summary: - Focused on UI polish, test reliability, and maintainability for camunda-modeler. Key features delivered include: (1) Side Panel UI/UX Improvements and Behavior with header alignment, icon sizing, docs-link icon, panel handle visibility, and active tab behavior, supported by tests; (2) Task Testing Enhancements and Zeebe API Testing, including updates to task-testing to 3.0.0-0, adaptation for breaking changes, and expanded test coverage for Zeebe API; (3) Codebase Maintenance: isPlane Refactor to remove backwards-compatibility code for bpmJS<8, simplifying logic and improving maintainability. - Major bugs fixed include ensuring side panel does not close when clicking the active tab and improving panel visibility rules, contributing to a more stable UX and maintainable codebase. - Overall impact: improved user experience for panel interactions, stronger test coverage and reliability around UI and Zeebe API surfaces, and a cleaner, more maintainable codebase that reduces regression risk and accelerates future work. - Technologies/skills demonstrated: front-end UI polish and behavior, test-driven development, test infrastructure upgrade, dependency management, and targeted refactoring for compatibility and maintainability.

February 2026

80 Commits • 23 Features

Feb 1, 2026

February 2026: Delivered major BPMN modeling enhancements, stability improvements, and modernization across the Camunda Modeler ecosystem. Focused on enabling flexible event handling, improving template integrity, and upgrading testing and dependencies to accelerate releases with better reliability and documentation.

January 2026

16 Commits • 5 Features

Jan 1, 2026

January 2026 – This month focused on strengthening conditional logic handling, easing maintenance, and enabling Camunda 8.9+ compatibility across BPMN tooling. Delivered new tests and utilities to improve robustness, added/adjusted validation rules to prevent misconfigurations, and performed targeted dependency upgrades to improve stability and performance. These efforts reduce runtime/workflow errors, improve UX in the properties panel, and enable safer templating and JSON schema evolution.

December 2025

17 Commits • 7 Features

Dec 1, 2025

December 2025: Delivered customer-focused enhancements and stability improvements across Camunda Modeler and related BPMN tooling. Key features enable more flexible process initiation, richer modeling capabilities for Camunda 8, and modernized testing practices, while dependency upgrades and FEEL/schema improvements boost stability and maintainability. Highlights include processDefinitionKey-based starts, Conditional Start Events support for Camunda 8, and a move to React Testing Library.

November 2025

22 Commits • 8 Features

Nov 1, 2025

November 2025 performance highlights across Camunda docs, Modeler, connectors, and BPMN tooling. Delivered Camunda Modeler 5.41.0 release with updated app/client packages and dependencies; completed a comprehensive third-party library upgrade across the project. Migrated the test framework from Enzyme to Testing Library, improving reliability and test coverage, and implemented accessibility and UX enhancements (ARIA role updates, privacy modal suppression, and file/provider UX). Updated documentation and platform compatibility (Web/Desktop Task Testing deprecation, macOS 26 support) to reduce user friction and ensure maintainability. Demonstrated cross-repo collaboration, release discipline, and a strong focus on quality and business value.

October 2025

25 Commits • 3 Features

Oct 1, 2025

October 2025 monthly summary focused on delivering business value through robust Task Testing UX, deployment reliability, and documentation improvements across camunda-modeler and camunda-docs. Highlights include UI/UX enhancements, stability fixes, responsive design adjustments, and comprehensive task-testing documentation updates.

September 2025

25 Commits • 10 Features

Sep 1, 2025

September 2025 performance highlights: delivered core self-hosted deployment improvements, enhanced task testing reliability, and strengthened observability across Camunda Modeler and supporting repos. Key features include adding an Operate URL field to self-managed deployment configurations, a programmatic open-deployment action, and StartInstanceConfig enhancements for optional startInstructions, runtimeInstructions, and variables, enabling more flexible runtime scenarios. We centralized TaskTestingApi and add getOperateUrl logic to support both Camunda Cloud and self-hosted endpoints, and introduced telemetry for task testing to track start/finish events. We improved error handling for gRPC scenarios (rejecting unsupported runtimeInstructions and surfacing gRPC errors with guidance to REST), added logging for TaskTestingApi, and refined deployment visuals and a context flag to identify TaskTesting-origin deployments. Documentation improvements were published to guide task testing, prerequisites, and troubleshooting. Overall impact: faster onboarding for self-hosted deployments, more reliable task testing workflows, and better operational visibility for product decisions.

August 2025

6 Commits • 3 Features

Aug 1, 2025

August 2025 monthly highlights for camunda-modeler: Delivered user-facing feature to promote AI agents on the Welcome Page with an icon and a link to the AI agent docs, aligning styling with the existing design system. Refactored Panel Component tests to boost coverage while simplifying test logic, removing test-specific attributes such as testid and consolidating setup for easier maintenance. Completed dependency management and release hygiene by updating THIRD_PARTY_NOTICES and shipping the v5.38.0 release. These efforts collectively improved onboarding experience, code quality, and release readiness.

July 2025

10 Commits • 4 Features

Jul 1, 2025

Month: 2025-07 — Summary of work on camunda-modeler focusing on plugin extensibility, test quality, styling pipeline, and release readiness. Emphasizes business value, stability, and contributed features.

June 2025

4 Commits • 3 Features

Jun 1, 2025

June 2025 monthly summary focused on delivering key features, addressing reliability gaps, and improving developer workflow across two repos: camunda-modeler and camunda-docs. The work emphasized business value, system stability, and faster developer velocity, with strong traceability to commits and concrete outcomes.

May 2025

11 Commits • 7 Features

May 1, 2025

May 2025 highlights: cross-repo delivery of Zeebe binding support in element templates, deployment overlay enhancements for self-managed deployments, and stable package releases with updated validations. The effort strengthened configuration fidelity, improved modeler UX, and set the stage for broader template capabilities, backed by tests, changelogs, and documentation updates.

April 2025

6 Commits • 5 Features

Apr 1, 2025

April 2025 monthly summary for Camunda engineering focusing on delivering business value through modernization, standardization, and integration improvements across three repositories. The work emphasizes build reliability, secure and maintainable tooling, UI consistency, and closer alignment with Camunda Cloud workflows.

March 2025

8 Commits • 4 Features

Mar 1, 2025

March 2025 monthly summary focused on delivering a centralized, persistent settings framework across Camunda Modeler and aligning documentation visuals with the latest product UI. Key architectural improvements established a foundation for scalable configuration management and plug-in customization, while restart mechanics were enhanced to improve resilience during state resets.

February 2025

25 Commits • 10 Features

Feb 1, 2025

February 2025 monthly summary focusing on key accomplishments, featuring multi-repo delivery, reliability improvements, and release-readiness across the Camunda and BPMN ecosystems. Highlights include version-aware removal enhancements, expanded testing infrastructure, UI/UX quality improvements, and CI/tooling modernization that underpin a robust, scalable modeler and linting platform. Key outcomes: - Feature delivery and maintenance across repositories with traceable changes and well-scoped commits. - Reliability and test coverage improvements enabling safer changes to element templates, modeling components, and lint rules. - Preparation for Camunda 8.8 compatibility and 5.33.0 release readiness with improved validation and developer tooling. - Streamlined dependency management and modernized CI/CD pipelines to reduce risk in future releases. Business value: These efforts reduce risk in removal of element templates, improve developer productivity through mocks and better tests, enable faster iteration with modern tooling, and ensure compatibility with latest Camunda 8.x diagrams and features.

January 2025

15 Commits • 5 Features

Jan 1, 2025

January 2025 Performance Summary: Across Camunda’s open-source suite, delivered cross-repo features, UI polish, accessibility improvements, and preparatory release work that strengthen runtime compatibility, UX consistency, and developer experience. Key initiatives targeted documentation clarity, ad-hoc subprocess support, and UI/styling normalization to future-proof workflows and reduce maintenance costs. Business value highlights include improved documentation for engine-based compatibility (reducing onboarding time for modelers and integrators), enhanced accessibility and readability for actionable templates, and up-to-date linting and properties support for Camunda 8.7+ workflows, enabling more reliable model validation and deployment readiness. Overall, the month established a stronger alignment between tooling, runtime versions, and user experience, while laying groundwork for smoother releases and broader coverage of AdHoc SubProcess scenarios.

December 2024

7 Commits • 3 Features

Dec 1, 2024

December 2024 focused on delivering a robust, template-driven modeling experience across Camunda Modeler and its ecosystem. Key work centered on dynamic element template resolution, runtime compatibility visibility, and a stable release baseline with updated dependencies. The efforts improve modeler reliability, UX feedback around templates, and provide a clear upgrade path for customers.

November 2024

10 Commits • 7 Features

Nov 1, 2024

November 2024: Focused maintenance and UX enhancements across core editor, docs, and components to accelerate onboarding, improve accessibility, and ensure readiness for Desktop Modeler v5.29. Highlights include a maintenance update to diagram-js for compatibility, comprehensive Desktop Modeler v5.29.0 documentation updates (visuals and macOS 15 support), addition of quick-start visuals for v5.29.0, editor usability improvements with keyboard shortcuts and canvas focus exposure, and accessibility improvements to the Properties Panel container along with version maintenance.

October 2024

3 Commits • 2 Features

Oct 1, 2024

Monthly performance summary for 2024-10 for camunda/camunda-modeler. Focused on maintenance, dependency updates, library bumps, and release readiness. Achieved stability and security improvements through dependency bumps and ensured release readiness via version tagging for 5.29.0. No user-facing bugs fixed this month.

September 2024

1 Commits

Sep 1, 2024

Month 2024-09 — Focused on stabilizing UI behavior and test reliability in bpmn-io/diagram-js. Delivered a bug fix for Popup Menu Cursor Position Handling, aligning test expectations with actual UI behavior, reducing UI misalignment risk and improving user experience in diagram editing workflows. This work also strengthened test stability and contributed to higher confidence in regression prevention.

Activity

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Quality Metrics

Correctness96.4%
Maintainability94.6%
Architecture93.4%
Performance92.6%
AI Usage21.4%

Skills & Technologies

Programming Languages

BPMNCSSHTMLImageJSONJavaScriptLESSLessMarkdownN/A

Technical Skills

AI IntegrationAPI DesignAPI DevelopmentAPI IntegrationAPI developmentAPI integrationAccessibilityApplication ConfigurationApplication DevelopmentBPMNBPMN LintingBPMN ModelingBPMN modelingBackend DevelopmentBuild Automation

Repositories Contributed To

10 repos

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

camunda/camunda-modeler

Oct 2024 Mar 2026
17 Months active

Languages Used

N/AMarkdownJavaScriptLESSCSSTextLessJSON

Technical Skills

Dependency ManagementDocumentationFront-end DevelopmentJavaScriptReactCSS

bpmn-io/bpmn-js-element-templates

Dec 2024 Apr 2026
10 Months active

Languages Used

CSSJSONJavaScriptMarkdownXMLTypeScriptYAML

Technical Skills

BPMNCSSDependency ManagementDocumentationFront-end DevelopmentJavaScript

bpmn-io/bpmn-js-properties-panel

Nov 2024 Feb 2026
7 Months active

Languages Used

JavaScriptMarkdownCSSHTMLXMLJSONBPMN

Technical Skills

AccessibilityDocumentationFront End DevelopmentJavaScriptVersion ControlBPMN Modeling

camunda/camunda-docs

Nov 2024 Feb 2026
9 Months active

Languages Used

MarkdownJavaScriptJSON

Technical Skills

DocumentationdocumentationContent ManagementRefactoringTechnical WritingBPMN

camunda/bpmnlint-plugin-camunda-compat

Jan 2025 Feb 2026
4 Months active

Languages Used

JavaScriptMarkdownN/AYAMLJSON

Technical Skills

BPMNDependency ManagementDocumentationJavaScriptLintingN/A

camunda/element-templates-json-schema

Nov 2024 Feb 2026
6 Months active

Languages Used

JavaScriptMarkdownJSONYAML

Technical Skills

JSON SchemaSchema ValidationTestingBackend DevelopmentDocumentationPackage Management

bpmn-io/diagram-js

Sep 2024 Apr 2026
3 Months active

Languages Used

JavaScriptJSONMarkdown

Technical Skills

JavaScriptfront end developmenttestingdocumentationpackage managementversion control

camunda/camunda-docs-static

Nov 2024 Mar 2025
2 Months active

Languages Used

No languages

Technical Skills

documentation

camunda/camunda-docs-manual

Nov 2024 Mar 2025
2 Months active

Languages Used

Image

Technical Skills

Documentation

camunda/connectors

Nov 2025 Nov 2025
1 Month active

Languages Used

JSON

Technical Skills

AI IntegrationConfiguration ManagementTemplate Management