otavanopisto/muikku
Nov 2024 – Mar 2026
17 Months active
Languages Used
CSSHTMLJavaScriptReactSCSSTypeScriptYAMLtsx
Technical Skills
API DesignAPI DocumentationAPI IntegrationBackend DevelopmentCSSCode Refactoring
Tero Tanttu
PROFILE
Tero Tanttu
Tero Tanttu led the ongoing development of otavanopisto/muikku, delivering robust frontend and full-stack features that modernized study planning, evaluation, and exam workflows. He architected scalable state management using React, Redux, and Jotai, refactored core UI components for maintainability, and integrated real-time collaboration and localization across multilingual contexts. Tero implemented advanced drag-and-drop planning, dynamic curriculum matrix views, and secure authentication flows, while aligning frontend logic with evolving backend APIs. His work included rigorous code cleanup, build tooling upgrades with TypeScript and Webpack, and accessibility improvements, resulting in a resilient, maintainable codebase that accelerated feature delivery and improved user experience.
Overall Statistics
Feature vs Bugs
63%Features
Repository Contributions
568Total
Bugs
125
Commits
568
Features
212
Lines of code
258,402
Activity Months17
Your Network
14 peopleSame Organization
@otavanopisto.fi5
Shared Repositories
9
aMember
Antti UkkonenMember
aviljakaineMember
Jari LankinenMember
pkukkonMember
petja-laitilaMember
petjaMember
saaralepistoMember
salarMember
Work History
March 2026
2 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for otavanopisto/muikku. Focused on maintainability and data accuracy improvements in the UI layer. Key changes include cleanup of the CurrentDependant interface and a bug fix in Study History data flow to ensure correct data is passed to RecordsListing, improving reliability for end users and reducing future maintenance risk.
2 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for otavanopisto/muikku. Focused on maintainability and data accuracy improvements in the UI layer. Key changes include cleanup of the CurrentDependant interface and a bug fix in Study History data flow to ensure correct data is passed to RecordsListing, improving reliability for end users and reducing future maintenance risk.
March 2026
February 2026
33 Commits • 8 Features
Feb 1, 2026February 2026 monthly summary for otavanopisto/muikku: Delivered foundational matrix view for CourseMatrix with workspace organization and semantic component restructuring, enabling scalable course/matrix visualization and easier maintenance. Completed major filtering and search enhancements to improve data discovery and user workflows. Refactored Guardian Redux state and routing (Guardian/Hops) to improve stability and maintainability, alongside frontend UX refinements (exam-timer, assessment components). Implemented broad quality and reliability improvements, including stylelint fixes, null safety checks, and accessibility/readiness fixes for unauthenticated users. These changes collectively boost business value by reducing toil, accelerating feature delivery, and improving user productivity in course planning and guardian experiences.
February 2026
33 Commits • 8 Features
Feb 1, 2026February 2026 monthly summary for otavanopisto/muikku: Delivered foundational matrix view for CourseMatrix with workspace organization and semantic component restructuring, enabling scalable course/matrix visualization and easier maintenance. Completed major filtering and search enhancements to improve data discovery and user workflows. Refactored Guardian Redux state and routing (Guardian/Hops) to improve stability and maintainability, alongside frontend UX refinements (exam-timer, assessment components). Implemented broad quality and reliability improvements, including stylelint fixes, null safety checks, and accessibility/readiness fixes for unauthenticated users. These changes collectively boost business value by reducing toil, accelerating feature delivery, and improving user productivity in course planning and guardian experiences.
January 2026
33 Commits • 10 Features
Jan 1, 2026January 2026 (2026-01) monthly summary for otavanopisto/muikku: Focused on delivering high-impact features, hardening data models, and improving tooling and stability. Key business outcomes include faster build iterations, more reliable real-time and exam flows, and cleaner, testable code paths that reduce maintenance costs.
33 Commits • 10 Features
Jan 1, 2026January 2026 (2026-01) monthly summary for otavanopisto/muikku: Focused on delivering high-impact features, hardening data models, and improving tooling and stability. Key business outcomes include faster build iterations, more reliable real-time and exam flows, and cleaner, testable code paths that reduce maintenance costs.
January 2026
December 2025
17 Commits • 9 Features
Dec 1, 2025December 2025 performance for otavanopisto/muikku focused on delivering high-value user-facing improvements, strengthening collaboration features, and stabilizing build and localization processes. Key features introduced include Study Planning Drag-and-Drop improvements with robust state handling, Course Availability UI enhancements using a matrix availability flag and new not-available treatments, Real-time Editing Indicators to show who is editing in HOPS and pedagogy forms, Guardian Records: Course Credits Display for clearer data, and Build Output Cleanup plus Print/Layout refinements for cleaner deliverables. Notable bug fixes include Sync Error Notifications Localization improvements, Help Materials crash prevention when copying material assignments, and Multiselect Validation Fix to ensure accuracy when selecting correct answers. These changes collectively improve user productivity, reduce confusion, and increase system reliability across multilingual contexts.
December 2025
17 Commits • 9 Features
Dec 1, 2025December 2025 performance for otavanopisto/muikku focused on delivering high-value user-facing improvements, strengthening collaboration features, and stabilizing build and localization processes. Key features introduced include Study Planning Drag-and-Drop improvements with robust state handling, Course Availability UI enhancements using a matrix availability flag and new not-available treatments, Real-time Editing Indicators to show who is editing in HOPS and pedagogy forms, Guardian Records: Course Credits Display for clearer data, and Build Output Cleanup plus Print/Layout refinements for cleaner deliverables. Notable bug fixes include Sync Error Notifications Localization improvements, Help Materials crash prevention when copying material assignments, and Multiselect Validation Fix to ensure accuracy when selecting correct answers. These changes collectively improve user productivity, reduce confusion, and increase system reliability across multilingual contexts.
November 2025
4 Commits • 1 Features
Nov 1, 2025November 2025: For otavanopisto/muikku, delivered a major Curriculum Matrix upgrade and stability fixes. The team migrated to SchoolCurriculumMatrix, refactored matrix.subjectsTable access, and updated getHighestCourseNumber to operate on the full matrix, enhancing consistency and future scalability. Implemented null-safety guards to prevent runtime errors when matrix or subjectsTable is absent in study progress components. Resolved a UI display issue in the Course dropdown by fixing syntax and ensuring correct credit formatting in the display string. These changes improve data reliability, user-facing accuracy, and developer maintainability, reducing support tickets and facilitating smoother curricula management. Key commits include 7f0a55b9aa94b1878b23a1a28f967a9851c0151a; b1ef1beedc8b76b2230abe1cd4fa26e3b052d10e; ac92e13c1b7e09678ed00af9cb6c22b75f62fdb7; f9904538bcb91a3eab4a175951f34082c4d64329.
4 Commits • 1 Features
Nov 1, 2025November 2025: For otavanopisto/muikku, delivered a major Curriculum Matrix upgrade and stability fixes. The team migrated to SchoolCurriculumMatrix, refactored matrix.subjectsTable access, and updated getHighestCourseNumber to operate on the full matrix, enhancing consistency and future scalability. Implemented null-safety guards to prevent runtime errors when matrix or subjectsTable is absent in study progress components. Resolved a UI display issue in the Course dropdown by fixing syntax and ensuring correct credit formatting in the display string. These changes improve data reliability, user-facing accuracy, and developer maintainability, reducing support tickets and facilitating smoother curricula management. Key commits include 7f0a55b9aa94b1878b23a1a28f967a9851c0151a; b1ef1beedc8b76b2230abe1cd4fa26e3b052d10e; ac92e13c1b7e09678ed00af9cb6c22b75f62fdb7; f9904538bcb91a3eab4a175951f34082c4d64329.
November 2025
October 2025
60 Commits • 25 Features
Oct 1, 20252025-10 monthly summary for otavanopisto/muikku: Key frontend refinements and backend-aligned improvements that enhance navigation, material/exam workflows, data integrity, and system resilience. Business value delivered includes faster, more reliable access to materials and exams, clearer permission boundaries, and reduced downtime through websocket improvements and build/lint/audit fixes. Technical achievements demonstrate advanced frontend architecture (Tanstack, Jotai, React Router), improved theming, and scalable material loading capabilities.
October 2025
60 Commits • 25 Features
Oct 1, 20252025-10 monthly summary for otavanopisto/muikku: Key frontend refinements and backend-aligned improvements that enhance navigation, material/exam workflows, data integrity, and system resilience. Business value delivered includes faster, more reliable access to materials and exams, clearer permission boundaries, and reduced downtime through websocket improvements and build/lint/audit fixes. Technical achievements demonstrate advanced frontend architecture (Tanstack, Jotai, React Router), improved theming, and scalable material loading capabilities.
September 2025
93 Commits • 39 Features
Sep 1, 2025September 2025 (Muikku repository otavanopisto/muikku) focused on delivering business-value features for the exam lifecycle, expanding evaluation capabilities, and modernizing the frontend architecture. The work enhances user experience for exam creation and evaluation, strengthens reliability of evaluation data, and establishes a scalable frontend foundation to support future iterations and localization.
93 Commits • 39 Features
Sep 1, 2025September 2025 (Muikku repository otavanopisto/muikku) focused on delivering business-value features for the exam lifecycle, expanding evaluation capabilities, and modernizing the frontend architecture. The work enhances user experience for exam creation and evaluation, strengthens reliability of evaluation data, and establishes a scalable frontend foundation to support future iterations and localization.
September 2025
August 2025
42 Commits • 17 Features
Aug 1, 2025In August 2025, the muikku frontend work delivered foundational state management improvements, UI refinements, and scalability enhancements that underpin more reliable pedagogy and course planning experiences. The work focused on maintainability, mobile usability, localization, and smoother integration with exam/material workflows, setting up the platform for faster feature delivery and more resilient UX.
August 2025
42 Commits • 17 Features
Aug 1, 2025In August 2025, the muikku frontend work delivered foundational state management improvements, UI refinements, and scalability enhancements that underpin more reliable pedagogy and course planning experiences. The work focused on maintainability, mobile usability, localization, and smoother integration with exam/material workflows, setting up the platform for faster feature delivery and more resilient UX.
July 2025
16 Commits • 1 Features
Jul 1, 2025In July 2025, the Muikku project delivered a major modernization of the pedagogy form and publishing workflow for otavanopisto/muikku, with improvements spanning UI/architecture, localization, and end-to-end data flow. The work enables a more reliable publishing process across guardian and teacher roles, aligns API interactions with backend endpoints, and lays groundwork for future enhancements in forms and reporting.
16 Commits • 1 Features
Jul 1, 2025In July 2025, the Muikku project delivered a major modernization of the pedagogy form and publishing workflow for otavanopisto/muikku, with improvements spanning UI/architecture, localization, and end-to-end data flow. The work enables a more reliable publishing process across guardian and teacher roles, aligns API interactions with backend endpoints, and lays groundwork for future enhancements in forms and reporting.
July 2025
June 2025
10 Commits • 4 Features
Jun 1, 2025June 2025: Key front-end deliverables across otavanopisto/muikku focused on security, reliability, and policy alignment. Implemented Ceepos authentication hardening and enhanced error handling, stabilized mobile navigation, refined MaterialLoader visibility logic, and updated curriculum hours to 28 per course. These changes reduce user friction and support load, improve error visibility and incident response, and ensure compliance with updated curriculum policy. Demonstrated expertise in modern Router-based navigation, robust error messaging, and dynamic UI state management across components.
June 2025
10 Commits • 4 Features
Jun 1, 2025June 2025: Key front-end deliverables across otavanopisto/muikku focused on security, reliability, and policy alignment. Implemented Ceepos authentication hardening and enhanced error handling, stabilized mobile navigation, refined MaterialLoader visibility logic, and updated curriculum hours to 28 per course. These changes reduce user friction and support load, improve error visibility and incident response, and ensure compliance with updated curriculum policy. Demonstrated expertise in modern Router-based navigation, robust error messaging, and dynamic UI state management across components.
May 2025
24 Commits • 8 Features
May 1, 2025May 2025 performance summary for otavanopisto/muikku: Successful overhaul of evaluation and lock management, localization completion, and UX robustness across the evaluation workflow. Delivered a cohesive set of frontend improvements with strong business value, improved reliability, and better developer experience.
24 Commits • 8 Features
May 1, 2025May 2025 performance summary for otavanopisto/muikku: Successful overhaul of evaluation and lock management, localization completion, and UX robustness across the evaluation workflow. Delivered a cohesive set of frontend improvements with strong business value, improved reliability, and better developer experience.
May 2025
April 2025
15 Commits • 2 Features
Apr 1, 2025April 2025 (2025-04) — Delivered a focused set of front-end improvements and stability fixes in otavanopisto/muikku, with an emphasis on study planning UX, localization, and matriculation workflows. Key outcomes include broadened Sami language support in the matriculation form, stabilized enrollment behavior, and a robust HOPS study planning experience featuring drag-and-drop planning, graduation goals, and localized inputs. Targeted bug fixes improved accuracy of completion estimates and evaluation rendering, reducing user friction and enabling smoother class allocations and matriculation processing.
April 2025
15 Commits • 2 Features
Apr 1, 2025April 2025 (2025-04) — Delivered a focused set of front-end improvements and stability fixes in otavanopisto/muikku, with an emphasis on study planning UX, localization, and matriculation workflows. Key outcomes include broadened Sami language support in the matriculation form, stabilized enrollment behavior, and a robust HOPS study planning experience featuring drag-and-drop planning, graduation goals, and localized inputs. Targeted bug fixes improved accuracy of completion estimates and evaluation rendering, reducing user friction and enabling smoother class allocations and matriculation processing.
March 2025
49 Commits • 14 Features
Mar 1, 2025March 2025 summary for otavanopisto/muikku focused on delivering a robust modernization of the build and bundling stack, targeted UI/UX enhancements, and improved reliability and localization. The month combined substantial build tooling improvements with UI refinements and robust error handling to reduce production risk, speed up development cycles, and improve user satisfaction across Guider/Records workflows and planner-related features.
49 Commits • 14 Features
Mar 1, 2025March 2025 summary for otavanopisto/muikku focused on delivering a robust modernization of the build and bundling stack, targeted UI/UX enhancements, and improved reliability and localization. The month combined substantial build tooling improvements with UI refinements and robust error handling to reduce production risk, speed up development cycles, and improve user satisfaction across Guider/Records workflows and planner-related features.
March 2025
February 2025
46 Commits • 24 Features
Feb 1, 2025February 2025 (Month: 2025-02) performance summary for otavanopisto/muikku. Focused on strengthening maintainability, UX stability, and data reliability while delivering impactful frontend features. Highlights include comprehensive code cleanup, UX improvements in timeline and guardian/student workflows, and aligned OpenAPI/frontend tooling for future scalability.
February 2025
46 Commits • 24 Features
Feb 1, 2025February 2025 (Month: 2025-02) performance summary for otavanopisto/muikku. Focused on strengthening maintainability, UX stability, and data reliability while delivering impactful frontend features. Highlights include comprehensive code cleanup, UX improvements in timeline and guardian/student workflows, and aligned OpenAPI/frontend tooling for future scalability.
January 2025
36 Commits • 15 Features
Jan 1, 2025January 2025 monthly summary for otavanopisto/muikku: Delivered core curriculum configuration and compulsory education planning to improve study planner dependencies, added PlanStatus placeholder, and enhanced study options/status visibility. Refactored course selection and study activity to reduce duplicate network calls and improve filtering. Implemented mobile-first UI/layout improvements and period UI/animation refinements to boost usability on both mobile and desktop. Introduced guardian-facing study progress view and upper secondary statistics, with related planStatistic testing. Expanded API surface and docs with CurriculumName in UserWithSchoolData and Swagger/API model updates. Addressed critical bugs across profile routing (null checks), hops workflow (onchange, history, scroll, onClose, matriculation loading), and workspace instance handling, improving stability and user experience. These changes collectively drive faster interactions, more accurate planning data, and better analytics visibility.
36 Commits • 15 Features
Jan 1, 2025January 2025 monthly summary for otavanopisto/muikku: Delivered core curriculum configuration and compulsory education planning to improve study planner dependencies, added PlanStatus placeholder, and enhanced study options/status visibility. Refactored course selection and study activity to reduce duplicate network calls and improve filtering. Implemented mobile-first UI/layout improvements and period UI/animation refinements to boost usability on both mobile and desktop. Introduced guardian-facing study progress view and upper secondary statistics, with related planStatistic testing. Expanded API surface and docs with CurriculumName in UserWithSchoolData and Swagger/API model updates. Addressed critical bugs across profile routing (null checks), hops workflow (onchange, history, scroll, onClose, matriculation loading), and workspace instance handling, improving stability and user experience. These changes collectively drive faster interactions, more accurate planning data, and better analytics visibility.
January 2025
December 2024
37 Commits • 17 Features
Dec 1, 2024December 2024 performance highlights for otavanopisto/muikku focused on stabilizing guider workflows, enhancing course planning capabilities, and improving overall reliability. Key UI refinements, architecture improvements, and data-flow hardening reduce user friction and support scalable study planning. Major efforts included Hops UI and Guider UX refinements with onload/router refactor, robust Hops websocket lifecycle fixes and initialization improvements, and a redesigned thunk architecture to simplify initialization and locking. Enhancements to course planning (drag-and-drop, endpoints, and modifiers) and batch persistence improved data reliability and user productivity. Early progress on Studyplan component testing and targeted quality improvements (pendingEditingWarning, error notifications, UI polish, and code cleanup) set the stage for faster delivery and fewer regressions. Technologies demonstrated include React/Redux (thunk), WebSocket lifecycle management, react-dnd drag-and-drop, Framer Motion experimentation, and locale fixes, with ongoing focus on maintainability and business value.
December 2024
37 Commits • 17 Features
Dec 1, 2024December 2024 performance highlights for otavanopisto/muikku focused on stabilizing guider workflows, enhancing course planning capabilities, and improving overall reliability. Key UI refinements, architecture improvements, and data-flow hardening reduce user friction and support scalable study planning. Major efforts included Hops UI and Guider UX refinements with onload/router refactor, robust Hops websocket lifecycle fixes and initialization improvements, and a redesigned thunk architecture to simplify initialization and locking. Enhancements to course planning (drag-and-drop, endpoints, and modifiers) and batch persistence improved data reliability and user productivity. Early progress on Studyplan component testing and targeted quality improvements (pendingEditingWarning, error notifications, UI polish, and code cleanup) set the stage for faster delivery and fewer regressions. Technologies demonstrated include React/Redux (thunk), WebSocket lifecycle management, react-dnd drag-and-drop, Framer Motion experimentation, and locale fixes, with ongoing focus on maintainability and business value.
November 2024
51 Commits • 17 Features
Nov 1, 2024November 2024 monthly summary for otavanopisto/muikku focused on delivering architectural improvements, reliability, and user-facing enhancements that enable faster feature delivery and improved business value. Key outcomes include centralized state management with Redux for Hops, new endpoints and real-time state synchronization, and significant codebase and documentation improvements that streamline onboarding and API usage. Study progress and study-related features were enhanced, while numerous UI, localization, and accessibility fixes improved end-user experience and maintainability.
51 Commits • 17 Features
Nov 1, 2024November 2024 monthly summary for otavanopisto/muikku focused on delivering architectural improvements, reliability, and user-facing enhancements that enable faster feature delivery and improved business value. Key outcomes include centralized state management with Redux for Hops, new endpoints and real-time state synchronization, and significant codebase and documentation improvements that streamline onboarding and API usage. Study progress and study-related features were enhanced, while numerous UI, localization, and accessibility fixes improved end-user experience and maintainability.
November 2024
Activity
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Quality Metrics
Correctness87.6%
Maintainability87.6%
Architecture84.0%
Performance83.0%
AI Usage21.0%
Skills & Technologies
Programming Languages
CSSHTMLJSONJSXJavaScriptReactSCSSSVGSassShell
Technical Skills
API DesignAPI DevelopmentAPI DocumentationAPI IntegrationAPI ManagementAPI designAPI integrationAccessibilityAnimationBackend DevelopmentBrowser APIBuild ConfigurationBuild Process OptimizationBuild Tool ConfigurationBuild Tools
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline