SURFscz/SBS
May 2021 – Mar 2026
18 Months active
Languages Used
JavaScriptPythonMarkdownSCSSSQLYAMLCSSXML
Technical Skills
API developmentNode.jsReactfull stack developmentAPI DesignAPI Development
Okke Harsta
PROFILE
Okke Harsta
Over 18 months, contributed to the SURFscz/SBS repository by delivering 126 features and resolving 104 bugs, focusing on authentication, API development, and robust testing. Work included building multi-factor authentication flows, enhancing API security, and modernizing deployment and CI/CD pipelines. Leveraged Python, React, and SQLAlchemy to implement features such as organization-scoped user management, real-time notifications, and distributed locking. Improved system reliability through dependency upgrades, code refactoring, and expanded test coverage. Addressed both backend and frontend challenges, optimizing database interactions and refining UI/UX. Maintained high code quality with continuous integration, linting, and documentation, supporting secure, maintainable, and scalable releases.
Overall Statistics
Feature vs Bugs
55%Features
Repository Contributions
410Total
Bugs
104
Commits
410
Features
126
Lines of code
297,695
Activity Months18
Your Network
11 peopleShared Repositories
11
Bas ZoetekouwMember
Eric van SchaikMember
Eric van SchaikMember
Floris FokkingaMember
Harry KoddenMember
harrykoddenMember
Logan AyliffeMember
Martin van EsMember
Ricardo van der HeijdenMember
Work History
March 2026
23 Commits • 7 Features
Mar 1, 2026March 2026 performance summary for SURFscz/SBS: Delivered core groundwork for issue #2258 with typing, parsing improvements, and expanded test coverage, including new tests and snapshot compatibility. Introduced type hints across the codebase and enforced code quality with Flake8. Upgraded dependencies (socket.io-client 4.8.3, minimatch) to improve compatibility and security. Refactored the PLSC endpoint to reduce the number of queries, enhancing query efficiency. Migrated the client build from CRA to Vite, aligning build outputs and dist handling for smoother deployments. Implemented a distributed lock table for #2213 to enable robust concurrency. Fixed multiple defects (issues #2299, #2301, #2245) and completed maintenance tasks (node_modules cleanup, merge conflict resolution, BSR-related changes). Overall impact: more reliable deployments, faster builds, improved test coverage, and a cleaner, safer codebase with measurable business value.
23 Commits • 7 Features
Mar 1, 2026March 2026 performance summary for SURFscz/SBS: Delivered core groundwork for issue #2258 with typing, parsing improvements, and expanded test coverage, including new tests and snapshot compatibility. Introduced type hints across the codebase and enforced code quality with Flake8. Upgraded dependencies (socket.io-client 4.8.3, minimatch) to improve compatibility and security. Refactored the PLSC endpoint to reduce the number of queries, enhancing query efficiency. Migrated the client build from CRA to Vite, aligning build outputs and dist handling for smoother deployments. Implemented a distributed lock table for #2213 to enable robust concurrency. Fixed multiple defects (issues #2299, #2301, #2245) and completed maintenance tasks (node_modules cleanup, merge conflict resolution, BSR-related changes). Overall impact: more reliable deployments, faster builds, improved test coverage, and a cleaner, safer codebase with measurable business value.
March 2026
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 (2026-02) for SURFscz/SBS: Key delivery focused on client state management reliability through an Immer upgrade to 11.1.3, completed via Dependabot PR #2223 (commit 524f66b5a02b60044a1ba32a4321b6857c728900). No major bugs documented this month. Impact: more robust, maintainable client state handling, enabling smoother UI flows and easier future enhancements. Technologies/skills: Immer 11.x, dependency management, PR automation, and client-side state patterns in JavaScript/TypeScript.
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 (2026-02) for SURFscz/SBS: Key delivery focused on client state management reliability through an Immer upgrade to 11.1.3, completed via Dependabot PR #2223 (commit 524f66b5a02b60044a1ba32a4321b6857c728900). No major bugs documented this month. Impact: more robust, maintainable client state handling, enabling smoother UI flows and easier future enhancements. Technologies/skills: Immer 11.x, dependency management, PR automation, and client-side state patterns in JavaScript/TypeScript.
January 2026
3 Commits
Jan 1, 2026January 2026 performance summary for SURFscz/SBS focused on security-conscious maintenance, reliability enhancements, and validation improvements that enable safer onboarding workflows. The work delivered strengthens the foundation for upcoming features and reduces risk in production by updating dependencies and tightening invitation validation.
3 Commits
Jan 1, 2026January 2026 performance summary for SURFscz/SBS focused on security-conscious maintenance, reliability enhancements, and validation improvements that enable safer onboarding workflows. The work delivered strengthens the foundation for upcoming features and reduces risk in production by updating dependencies and tightening invitation validation.
January 2026
December 2025
6 Commits • 3 Features
Dec 1, 2025Month: 2025-12 — This concise monthly summary highlights business value and technical achievements for SURFscz/SBS. It focuses on delivered features, critical fixes, overall impact, and demonstrated technologies/skills.
December 2025
6 Commits • 3 Features
Dec 1, 2025Month: 2025-12 — This concise monthly summary highlights business value and technical achievements for SURFscz/SBS. It focuses on delivered features, critical fixes, overall impact, and demonstrated technologies/skills.
November 2025
18 Commits • 4 Features
Nov 1, 2025November 2025 (SURFscz/SBS) focused on security, compatibility, and reliability through broad runtime/dependency modernization, improved service management, UX improvements for authentication flows, and CI/python stability fixes. The team delivered a cohesive upgrade cycle aimed at reducing risk, speeding deployments, and improving user experience, while laying groundwork for future maintainability and performance optimizations.
18 Commits • 4 Features
Nov 1, 2025November 2025 (SURFscz/SBS) focused on security, compatibility, and reliability through broad runtime/dependency modernization, improved service management, UX improvements for authentication flows, and CI/python stability fixes. The team delivered a cohesive upgrade cycle aimed at reducing risk, speeding deployments, and improving user experience, while laying groundwork for future maintainability and performance optimizations.
November 2025
October 2025
12 Commits • 5 Features
Oct 1, 2025October 2025 — SURFscz/SBS monthly performance highlights: Delivered user-centric authentication and UI improvements, modernized the design system, and strengthened CI and dependency maintenance. Key features and enhancements were applied to MFA reset token eligibility, identity provider hint (idpHints) support in the authorization flow, and the invite-with-link UI, complemented by a Surf Design System (SDS) upgrade with corresponding UI test regeneration. Notable bug fixes included enhanced service access control gating (schac_home must match the service CRM) and improved CroppedImageDialog error handling. The combined work improves security, reduces friction in login and invitation flows, and increases build reliability and test coverage.
October 2025
12 Commits • 5 Features
Oct 1, 2025October 2025 — SURFscz/SBS monthly performance highlights: Delivered user-centric authentication and UI improvements, modernized the design system, and strengthened CI and dependency maintenance. Key features and enhancements were applied to MFA reset token eligibility, identity provider hint (idpHints) support in the authorization flow, and the invite-with-link UI, complemented by a Surf Design System (SDS) upgrade with corresponding UI test regeneration. Notable bug fixes included enhanced service access control gating (schac_home must match the service CRM) and improved CroppedImageDialog error handling. The combined work improves security, reduces friction in login and invitation flows, and increases build reliability and test coverage.
September 2025
34 Commits • 11 Features
Sep 1, 2025September 2025 (SURFscz/SBS) delivered security, stability, and quality improvements with tangible business value. Key features such as OIDC client secret generation were implemented to enhance secure client integrations, alongside database cleanliness through schema cleanup. Build reliability and CI stability were strengthened via targeted build fixes, unused variable removal, and client build updates. Test quality was boosted through snapshot regeneration, expanded coverage, and linting (Flake8/ESLint) to reduce regressions. Dependency hygiene was improved with upgrades and a Yarn-based install workflow. The work lays groundwork for the BSR feature and preserves system performance with a tuned file size limit. Overall, these changes reduce risk, accelerate safe deployments, and improve maintainability and developer velocity.
34 Commits • 11 Features
Sep 1, 2025September 2025 (SURFscz/SBS) delivered security, stability, and quality improvements with tangible business value. Key features such as OIDC client secret generation were implemented to enhance secure client integrations, alongside database cleanliness through schema cleanup. Build reliability and CI stability were strengthened via targeted build fixes, unused variable removal, and client build updates. Test quality was boosted through snapshot regeneration, expanded coverage, and linting (Flake8/ESLint) to reduce regressions. Dependency hygiene was improved with upgrades and a Yarn-based install workflow. The work lays groundwork for the BSR feature and preserves system performance with a tuned file size limit. Overall, these changes reduce risk, accelerate safe deployments, and improve maintainability and developer velocity.
September 2025
July 2025
3 Commits • 2 Features
Jul 1, 2025July 2025 monthly summary for SURFscz/SBS. Key accomplishments include: 1) Two-Factor Authentication Setup Flow Enhancement delivering a more robust 2FA configuration experience; 2) Swagger API Authorization Header Naming Fix ensuring the Bearer authentication is parsed correctly across endpoints; 3) Service Overview UI Improvement: Refresh Token Checkbox repositioning for clearer grouping with no behavioral changes. The changes improve security, reliability, and developer UX, delivering measurable impact on authentication flow, API consistency, and UI clarity. Maintained code quality and maintainability throughout.
July 2025
3 Commits • 2 Features
Jul 1, 2025July 2025 monthly summary for SURFscz/SBS. Key accomplishments include: 1) Two-Factor Authentication Setup Flow Enhancement delivering a more robust 2FA configuration experience; 2) Swagger API Authorization Header Naming Fix ensuring the Bearer authentication is parsed correctly across endpoints; 3) Service Overview UI Improvement: Refresh Token Checkbox repositioning for clearer grouping with no behavioral changes. The changes improve security, reliability, and developer UX, delivering measurable impact on authentication flow, API consistency, and UI clarity. Maintained code quality and maintainability throughout.
June 2025
26 Commits • 10 Features
Jun 1, 2025June 2025 (SURFscz/SBS) delivered significant security, UX, and stability improvements across the platform, with a strong emphasis on hardening access control, refining service protocols, and improving data handling. Key features delivered include: a Service Protocol Refactor and Cleanup (typo cleanup during refactor) and OIDC/SAML UI Access Control Toggles; SAML Metadata ACS Locations; Sanitize Grant Types; and sensible defaults for Services synced to Manage. Additional work included maintenance tasks (Browserslist update and endpoints cleanup), UX safeguards (prevent Multi-String Autoformat), and safeguards to avoid unintended metadata parsing when uploads are cleared. The month also encompassed broad bug fixes and quality enhancements across issues #1845, #1942, #1950, #1958, and #1974, plus tests improvements and code quality improvements (Flake8). Impact: improved security posture, safer and more intuitive admin UX, reduced risk of regressions, and better maintainability through dependency updates and Python 3.9 compatibility adjustments.
26 Commits • 10 Features
Jun 1, 2025June 2025 (SURFscz/SBS) delivered significant security, UX, and stability improvements across the platform, with a strong emphasis on hardening access control, refining service protocols, and improving data handling. Key features delivered include: a Service Protocol Refactor and Cleanup (typo cleanup during refactor) and OIDC/SAML UI Access Control Toggles; SAML Metadata ACS Locations; Sanitize Grant Types; and sensible defaults for Services synced to Manage. Additional work included maintenance tasks (Browserslist update and endpoints cleanup), UX safeguards (prevent Multi-String Autoformat), and safeguards to avoid unintended metadata parsing when uploads are cleared. The month also encompassed broad bug fixes and quality enhancements across issues #1845, #1942, #1950, #1958, and #1974, plus tests improvements and code quality improvements (Flake8). Impact: improved security posture, safer and more intuitive admin UX, reduced risk of regressions, and better maintainability through dependency updates and Python 3.9 compatibility adjustments.
June 2025
May 2025
25 Commits • 10 Features
May 1, 2025May 2025 focused on stabilizing SBS with targeted bug fixes, security-conscious UI changes, expanded test coverage, and foundational environment improvements. Deliveries enhanced reliability, developer experience, and API clarity, driving business value through reduced production risk and faster delivery.
May 2025
25 Commits • 10 Features
May 1, 2025May 2025 focused on stabilizing SBS with targeted bug fixes, security-conscious UI changes, expanded test coverage, and foundational environment improvements. Deliveries enhanced reliability, developer experience, and API clarity, driving business value through reduced production risk and faster delivery.
April 2025
84 Commits • 24 Features
Apr 1, 2025April 2025 — SURFscz/SBS: Strengthened data accuracy, security, and deployment stability. Delivered a new #1692 lookup flow (using user_id) with attribute alignment, hardened interrupt/redirect handling, and expanded test coverage. Cleaned up legacy code by removing April’s Fool logic. Implemented SSH conversion for #502 with tests and UI hints, and invested in maintainability through constants refactor and improved logging. Upgraded dependencies, streamlined environment setup (Yarn), and enhanced documentation. Overall, these improvements reduce risk, accelerate releases, and improve observability and developer productivity.
84 Commits • 24 Features
Apr 1, 2025April 2025 — SURFscz/SBS: Strengthened data accuracy, security, and deployment stability. Delivered a new #1692 lookup flow (using user_id) with attribute alignment, hardened interrupt/redirect handling, and expanded test coverage. Cleaned up legacy code by removing April’s Fool logic. Implemented SSH conversion for #502 with tests and UI hints, and invested in maintainability through constants refactor and improved logging. Upgraded dependencies, streamlined environment setup (Yarn), and enhanced documentation. Overall, these improvements reduce risk, accelerate releases, and improve observability and developer productivity.
April 2025
March 2025
74 Commits • 15 Features
Mar 1, 2025March 2025 (2025-03) monthly summary for SURFscz/SBS: delivered UI refinements, bug fixes, and stability improvements across the batch to boost reliability, developer productivity, and release confidence. Focused on UI behavior, error visibility, and local/development workflows, with a strong emphasis on test stability and code quality.
March 2025
74 Commits • 15 Features
Mar 1, 2025March 2025 (2025-03) monthly summary for SURFscz/SBS: delivered UI refinements, bug fixes, and stability improvements across the batch to boost reliability, developer productivity, and release confidence. Focused on UI behavior, error visibility, and local/development workflows, with a strong emphasis on test stability and code quality.
February 2025
26 Commits • 9 Features
Feb 1, 2025February 2025 monthly summary for SURFscz/SBS. Focused on stabilizing core platform, expanding capabilities, and strengthening test quality. The month delivered important feature capabilities, resolved a number of high-severity bugs, and significantly improved testing, linting, and security posture. This combination reduces production risk and accelerates future release cycles.
26 Commits • 9 Features
Feb 1, 2025February 2025 monthly summary for SURFscz/SBS. Focused on stabilizing core platform, expanding capabilities, and strengthening test quality. The month delivered important feature capabilities, resolved a number of high-severity bugs, and significantly improved testing, linting, and security posture. This combination reduces production risk and accelerates future release cycles.
February 2025
January 2025
43 Commits • 9 Features
Jan 1, 2025January 2025 (SURFscz/SBS) delivered robust testing, API enhancements, real-time capabilities, and quality improvements that collectively reduce risk and unlock business value. Key work spanned EB Flow testing and coverage, a new collaboration units API endpoint with server-side token checks, real-time notifications via Socket.IO, a migration to modern SQLAlchemy syntax with improved error handling, and ongoing maintenance/bug fixes across critical issues.
January 2025
43 Commits • 9 Features
Jan 1, 2025January 2025 (SURFscz/SBS) delivered robust testing, API enhancements, real-time capabilities, and quality improvements that collectively reduce risk and unlock business value. Key work spanned EB Flow testing and coverage, a new collaboration units API endpoint with server-side token checks, real-time notifications via Socket.IO, a migration to modern SQLAlchemy syntax with improved error handling, and ongoing maintenance/bug fixes across critical issues.
December 2024
7 Commits • 5 Features
Dec 1, 2024December 2024 monthly summary for SURFscz/SBS: Delivered robustness and UX improvements across authentication, session handling, and testing infrastructure. Fixed a critical interruption flow bug and added data integrity tests; modernized server-side certificate handling in the proxy login flow; introduced a Mock EngineBlock flow to enable end-to-end testing of EB interrupt flow; strengthened AUP/2FA redirects with per-redirect state and improved session storage across user switches; upgraded SDS library to 0.0.120 and refreshed the lockfile; performed locale cleanup to remove unused English and Dutch strings for UI clarity. These changes improved reliability, security, and developer productivity, with broader test coverage and clearer UI.
7 Commits • 5 Features
Dec 1, 2024December 2024 monthly summary for SURFscz/SBS: Delivered robustness and UX improvements across authentication, session handling, and testing infrastructure. Fixed a critical interruption flow bug and added data integrity tests; modernized server-side certificate handling in the proxy login flow; introduced a Mock EngineBlock flow to enable end-to-end testing of EB interrupt flow; strengthened AUP/2FA redirects with per-redirect state and improved session storage across user switches; upgraded SDS library to 0.0.120 and refreshed the lockfile; performed locale cleanup to remove unused English and Dutch strings for UI clarity. These changes improved reliability, security, and developer productivity, with broader test coverage and clearer UI.
December 2024
November 2024
23 Commits • 9 Features
Nov 1, 2024November 2024 – SURFscz/SBS: Strengthened reliability, observability, and automation while laying groundwork for upcoming feature work. Key outcomes include enhanced observability with logging for issue #1623; CI/test stabilization through fixes for failing/flaky tests and explicit user handling; automation and security improvements via auto build enablement and dependency upgrades; API and formatting improvements including extending the organisation detail API to include memberships for all COs and formatter enhancements; ongoing work toward issue #1692 with a dedicated feature branch. Regressions and stability efforts were carefully managed, including a revert of a previous fix for #1668 and multiple bug fixes for issues #1622, #1662, #1664, #1668, #1694.
November 2024
23 Commits • 9 Features
Nov 1, 2024November 2024 – SURFscz/SBS: Strengthened reliability, observability, and automation while laying groundwork for upcoming feature work. Key outcomes include enhanced observability with logging for issue #1623; CI/test stabilization through fixes for failing/flaky tests and explicit user handling; automation and security improvements via auto build enablement and dependency upgrades; API and formatting improvements including extending the organisation detail API to include memberships for all COs and formatter enhancements; ongoing work toward issue #1692 with a dedicated feature branch. Regressions and stability efforts were carefully managed, including a revert of a previous fix for #1668 and multiple bug fixes for issues #1622, #1662, #1664, #1668, #1694.
April 2022
1 Commits • 1 Features
Apr 1, 20222022-04 Monthly Summary — Focused on delivering identity enhancements to support organization-scoped user management in SURFscz/SBS. Key feature implemented: User Organisation UID Feature, introducing an organisation UID to the user model to enable organisation-based user identification and management. This work included updates to the user API, database models, and front-end components to accommodate the new UID. The change is traceable to commit c2c833483bbdd2ea1ea02abab4cf2a35806237dd ("Added organisation UID to the user"). Major bugs fixed: No major bugs fixed this month. Overall impact and accomplishments: Establishes a foundation for multi-tenant organization support, improving security, admin efficiency, and data governance by enabling organisation-level access control and streamlined user management. Demonstrated end-to-end delivery across API, database, and frontend layers with a clear, auditable commit history. Provides the groundwork for future analytics and permissions enhancements at the organization level. Technologies/skills demonstrated: Backend API design and updates, relational database modeling, frontend integration, end-to-end feature delivery, and strong version control discipline with a concise commit history.
1 Commits • 1 Features
Apr 1, 20222022-04 Monthly Summary — Focused on delivering identity enhancements to support organization-scoped user management in SURFscz/SBS. Key feature implemented: User Organisation UID Feature, introducing an organisation UID to the user model to enable organisation-based user identification and management. This work included updates to the user API, database models, and front-end components to accommodate the new UID. The change is traceable to commit c2c833483bbdd2ea1ea02abab4cf2a35806237dd ("Added organisation UID to the user"). Major bugs fixed: No major bugs fixed this month. Overall impact and accomplishments: Establishes a foundation for multi-tenant organization support, improving security, admin efficiency, and data governance by enabling organisation-level access control and streamlined user management. Demonstrated end-to-end delivery across API, database, and frontend layers with a clear, auditable commit history. Provides the groundwork for future analytics and permissions enhancements at the organization level. Technologies/skills demonstrated: Backend API design and updates, relational database modeling, frontend integration, end-to-end feature delivery, and strong version control discipline with a concise commit history.
April 2022
May 2021
1 Commits • 1 Features
May 1, 2021May 2021 Monthly Summary — SURFscz/SBS: Delivered a Production Deployment Action to automate and document the deployment workflow for production pushes. This action establishes the deployment process without introducing new user-facing code, setting a foundation for safer, faster releases. Commit ce4f55f4692e06e4b5d920631cd5112803ce29c0 labeled as of deployment force.
May 2021
1 Commits • 1 Features
May 1, 2021May 2021 Monthly Summary — SURFscz/SBS: Delivered a Production Deployment Action to automate and document the deployment workflow for production pushes. This action establishes the deployment process without introducing new user-facing code, setting a foundation for safer, faster releases. Commit ce4f55f4692e06e4b5d920631cd5112803ce29c0 labeled as of deployment force.
Activity
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Quality Metrics
Correctness86.8%
Maintainability86.4%
Architecture80.8%
Performance81.0%
AI Usage20.6%
Skills & Technologies
Programming Languages
BashCSSCSVDockerfileHTMLJSXJavaScriptMarkdownPythonReact
Technical Skills
API DesignAPI DevelopmentAPI DocumentationAPI IntegrationAPI SecurityAPI TestingAPI developmentAPI integrationAccess ControlAlembicAlembic migrationAsset ManagementAuthenticationAuthentication FlowAuthorization
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