open-formulieren/open-forms
Jul 2025 – Apr 2026
9 Months active
Languages Used
HTMLJavaScriptPythonRSTRstrstDjangoYAML
Technical Skills
API IntegrationBackend DevelopmentDjangoDocumentationFrontend DevelopmentPayment Gateway Integration
Sonny Bakker
PROFILE
Sonny Bakker
Sonny contributed to the open-formulieren/open-forms repository by developing and enhancing payment integrations, form management APIs, and validation workflows. He implemented features such as the Worldline payment plugin and migration tools, improved form data integrity, and expanded API endpoints for form creation and updates. Using Django, Python, and React, Sonny focused on backend reliability, frontend consistency, and robust testing, addressing issues like duplicate notifications and validation accuracy. His work included security updates, CI/CD improvements, and localization, resulting in more maintainable releases and streamlined onboarding. The depth of his contributions strengthened data quality, user experience, and long-term maintainability across the project.
Overall Statistics
Feature vs Bugs
82%Features
Repository Contributions
79Total
Bugs
6
Commits
79
Features
27
Lines of code
733,883
Activity Months9
Your Network
37 peopleShared Repositories
17
Work History
April 2026
1 Commits
Apr 1, 2026April 2026 monthly summary for open-formulieren/open-forms: Delivered a targeted bug fix to improve form submission validation accuracy, aligning backend validation with frontend error display and eliminating incorrect errors on the submission overview. Implemented automated tests to cover validation behavior and prevent regressions. The changes enhance UX for complex forms, reduce user confusion, and improve reliability in submission workflows. Key commit 113c8b648db586d769439ee05568d55f2f4b5bc4 addresses issue #5924.
1 Commits
Apr 1, 2026April 2026 monthly summary for open-formulieren/open-forms: Delivered a targeted bug fix to improve form submission validation accuracy, aligning backend validation with frontend error display and eliminating incorrect errors on the submission overview. Implemented automated tests to cover validation behavior and prevent regressions. The changes enhance UX for complex forms, reduce user confusion, and improve reliability in submission workflows. Key commit 113c8b648db586d769439ee05568d55f2f4b5bc4 addresses issue #5924.
April 2026
March 2026
5 Commits • 1 Features
Mar 1, 2026March 2026 focused on delivering V3 Form Endpoint enhancements and reliability improvements across email notifications and DigiD OIDC error handling. Key commits underpinning the work included 0f2b224cb7f553d0e46d542aeb2cb5b8f672259d, aef21cc32ce797181efaf6a1fe2a051671d91426, 96ed4a855e13ddbda170d2a6eb4355979485f510, 9547bf742e319a3dd57568694b256f755af090b0, and 39b2d8ce5c5a9ebca371f12043b2515046b5337d. These changes implement: (1) confirmation_email_template on the v3 form endpoint, (2) registration_backends support for multiple registration backends, and (3) payment-related fields for forms on the v3 endpoint; (4) prevention of duplicate email notifications when payment status updates occur without configured email addresses; and (5) improved DigiD OIDC error handling by mapping Signicat error codes to Open Forms error codes to better report user cancellations. Business impact includes improved customer communications, flexible backend integration, reduced duplicate notifications, clearer error reporting, and a smoother user journey with lower support load.
March 2026
5 Commits • 1 Features
Mar 1, 2026March 2026 focused on delivering V3 Form Endpoint enhancements and reliability improvements across email notifications and DigiD OIDC error handling. Key commits underpinning the work included 0f2b224cb7f553d0e46d542aeb2cb5b8f672259d, aef21cc32ce797181efaf6a1fe2a051671d91426, 96ed4a855e13ddbda170d2a6eb4355979485f510, 9547bf742e319a3dd57568694b256f755af090b0, and 39b2d8ce5c5a9ebca371f12043b2515046b5337d. These changes implement: (1) confirmation_email_template on the v3 form endpoint, (2) registration_backends support for multiple registration backends, and (3) payment-related fields for forms on the v3 endpoint; (4) prevention of duplicate email notifications when payment status updates occur without configured email addresses; and (5) improved DigiD OIDC error handling by mapping Signicat error codes to Open Forms error codes to better report user cancellations. Business impact includes improved customer communications, flexible backend integration, reduced duplicate notifications, clearer error reporting, and a smoother user journey with lower support load.
February 2026
5 Commits • 4 Features
Feb 1, 2026February 2026 monthly summary focusing on delivering robust form management, improved user experience for KvK-based organizations, enhanced payment resilience, and strengthened development governance across the open-forms repository.
5 Commits • 4 Features
Feb 1, 2026February 2026 monthly summary focusing on delivering robust form management, improved user experience for KvK-based organizations, enhanced payment resilience, and strengthened development governance across the open-forms repository.
February 2026
January 2026
16 Commits • 3 Features
Jan 1, 2026January 2026 (open-forms) delivered stability, data quality, and maintainability improvements in open-formulieren/open-forms. Key outcomes include hardening form data integrity and conditional configuration, enabling branch-based prefill for plugins, and strengthening testing/migration workflows. These changes reduce data inconsistencies, remove incorrect defaults, and streamline QA and migrations, driving better user experiences and lower support costs.
January 2026
16 Commits • 3 Features
Jan 1, 2026January 2026 (open-forms) delivered stability, data quality, and maintainability improvements in open-formulieren/open-forms. Key outcomes include hardening form data integrity and conditional configuration, enabling branch-based prefill for plugins, and strengthening testing/migration workflows. These changes reduce data inconsistencies, remove incorrect defaults, and streamline QA and migrations, driving better user experiences and lower support costs.
December 2025
3 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for open-formulieren/open-forms: Strengthened observability, ensured submission integrity, and improved UI consistency across versions. Delivered key features and fixes that enhance reliability, data integrity, and maintainability, aligning with business goals for traceability, user experience, and developer productivity.
3 Commits • 2 Features
Dec 1, 2025December 2025 monthly summary for open-formulieren/open-forms: Strengthened observability, ensured submission integrity, and improved UI consistency across versions. Delivered key features and fixes that enhance reliability, data integrity, and maintainability, aligning with business goals for traceability, user experience, and developer productivity.
December 2025
October 2025
3 Commits • 2 Features
Oct 1, 2025October 2025 — open-formulieren/open-forms: Delivered security and deployment improvements with measurable business impact. Key updates included the Django security patch (4.2.25) applied via dependency management, added configurability for session cookie domain, and updated Docker Hub supported versions configuration to reflect current targets.
October 2025
3 Commits • 2 Features
Oct 1, 2025October 2025 — open-formulieren/open-forms: Delivered security and deployment improvements with measurable business impact. Key updates included the Django security patch (4.2.25) applied via dependency management, added configurability for session cookie domain, and updated Docker Hub supported versions configuration to reflect current targets.
September 2025
33 Commits • 9 Features
Sep 1, 2025September 2025 monthly summary for open-forms: Focused on reliability, data integrity, and localization across Worldline and Ogone payment flows. Key deliverables include Worldline migration and admin improvements (data migration, admin form enhancements, synchronization of payment IDs, upgrade checks, validation to prevent changes to completed payments, merchant reference generation, and provider_payment_id logging), Changelog maintenance for Worldline-related changes and 4879/5619 updates, and translations updates (backend and frontend). Additional impact came from Ogone payment integration improvements and CI updates (payment selection improvements, upgraded CI simulation, SDK release notes, and new cassette-based tests), as well as tests and resilience improvements (mimetype detection for MSG files with override tests, descriptor tests for special characters). Documentation updates include Worldline descriptor/helptext updates and updated Worldline payments docs. Bug fix: small typo in batch 2."
33 Commits • 9 Features
Sep 1, 2025September 2025 monthly summary for open-forms: Focused on reliability, data integrity, and localization across Worldline and Ogone payment flows. Key deliverables include Worldline migration and admin improvements (data migration, admin form enhancements, synchronization of payment IDs, upgrade checks, validation to prevent changes to completed payments, merchant reference generation, and provider_payment_id logging), Changelog maintenance for Worldline-related changes and 4879/5619 updates, and translations updates (backend and frontend). Additional impact came from Ogone payment integration improvements and CI updates (payment selection improvements, upgraded CI simulation, SDK release notes, and new cassette-based tests), as well as tests and resilience improvements (mimetype detection for MSG files with override tests, descriptor tests for special characters). Documentation updates include Worldline descriptor/helptext updates and updated Worldline payments docs. Bug fix: small typo in batch 2."
September 2025
August 2025
7 Commits • 4 Features
Aug 1, 2025Open Forms — August 2025: Focus on enabling Worldline processing while strengthening test coverage and release documentation. Delivered groundwork for Worldline Ogone migration within the payment provider, expanded BRP integration test coverage with additional VCR cassettes, restored Suwinet prefill test data with failure-path coverage, and refined changelog/release notes to cover patch releases and Ogone migration configuration. Results reduce production risk, accelerate Worldline onboarding, and improve test reliability ahead of Open Forms 3.3.0.
August 2025
7 Commits • 4 Features
Aug 1, 2025Open Forms — August 2025: Focus on enabling Worldline processing while strengthening test coverage and release documentation. Delivered groundwork for Worldline Ogone migration within the payment provider, expanded BRP integration test coverage with additional VCR cassettes, restored Suwinet prefill test data with failure-path coverage, and refined changelog/release notes to cover patch releases and Ogone migration configuration. Results reduce production risk, accelerate Worldline onboarding, and improve test reliability ahead of Open Forms 3.3.0.
July 2025
6 Commits • 2 Features
Jul 1, 2025July 2025 (2025-07) monthly summary for open-formulieren/open-forms. Key features delivered: (1) Worldline Payment Plugin to replace Ogone, including API integration, configuration, and frontend components for payment processing to ensure a smooth transition and ongoing support. (2) Documentation and Release Process Improvements: upgrade instructions, polished changelog entries, documented Dutch Nimma features, and standardized release documentation with changelog propagation to master after publishing a release. Notable focus on release engineering and maintainability. No explicit major bugs fixed are recorded in this period based on available data; emphasis was on feature delivery and process improvements to stabilize and accelerate future releases. Overall impact: enhanced payment reliability and vendor transition with clearer, more maintainable release documentation, reducing onboarding time for contributors and customers. Technologies/skills demonstrated: API integration, frontend component development, release engineering, and comprehensive documentation.
6 Commits • 2 Features
Jul 1, 2025July 2025 (2025-07) monthly summary for open-formulieren/open-forms. Key features delivered: (1) Worldline Payment Plugin to replace Ogone, including API integration, configuration, and frontend components for payment processing to ensure a smooth transition and ongoing support. (2) Documentation and Release Process Improvements: upgrade instructions, polished changelog entries, documented Dutch Nimma features, and standardized release documentation with changelog propagation to master after publishing a release. Notable focus on release engineering and maintainability. No explicit major bugs fixed are recorded in this period based on available data; emphasis was on feature delivery and process improvements to stabilize and accelerate future releases. Overall impact: enhanced payment reliability and vendor transition with clearer, more maintainable release documentation, reducing onboarding time for contributors and customers. Technologies/skills demonstrated: API integration, frontend component development, release engineering, and comprehensive documentation.
July 2025
Activity
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Quality Metrics
Correctness94.6%
Maintainability91.4%
Architecture90.4%
Performance88.8%
AI Usage21.0%
Skills & Technologies
Programming Languages
CSSDjangoDockerfileGettextHTMLJavaScriptMarkdownPOPythonRST
Technical Skills
API DevelopmentAPI IntegrationAPI TestingAPI developmentAPI integrationBackend DevelopmentCI/CDCI/CD ConfigurationCSSChangelog ManagementCode CleanupConfiguration ManagementData MigrationData RetrievalDatabase Design
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline