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Emil Gunnarsson

PROFILE

Emil Gunnarsson

Worked across SciCatProject/scicat-backend-next and SciCatProject/frontend to deliver features and fixes that improved API reliability, data integrity, and user experience. Enhanced backend API contracts and documentation using TypeScript, NestJS, and OpenAPI, introducing partial update support and aligning DTO validation with schema requirements. On the frontend, implemented Angular-based pagination, inline editing, and configurable metadata formatting, while addressing state management and permission-driven UI controls. Addressed MongoDB pagination accuracy and streamlined backend access control logic, ensuring robust data handling. Maintained code quality through ESLint updates and comprehensive testing, resulting in more maintainable, flexible, and user-focused dataset management across both repositories.

Overall Statistics

Feature vs Bugs

58%Features

Repository Contributions

13Total
Bugs
5
Commits
13
Features
7
Lines of code
1,775
Activity Months7

Work History

March 2026

5 Commits • 2 Features

Mar 1, 2026

March 2026 monthly summary: Cross-repo improvements across backend and frontend focusing on permission reliability, URL correctness, UI usability, and display flexibility. Key achievements include backend permission cleanup, DOI landing page URL handling fix, ESLint compatibility formatting fixes, inline editing for dataset table cells, and configurable dataset page size options. Impact: streamlined permission verification, fewer URL errors, improved code quality and maintainability, and enhanced user workflow for dataset management. Technologies demonstrated: TypeScript/JavaScript, ESLint, React, backend refactors, and commit hygiene.

December 2025

2 Commits • 2 Features

Dec 1, 2025

2025-12 Monthly summary for SciCatProject/frontend: Delivered two major features focused on UI usability and data presentation, fixed a critical UI visibility bug, and reinforced maintainability with new formatting services and config-driven behavior. The work emphasizes business value for data editors and data consumers by reducing confusion, ensuring permission-based editing, and improving readability of numeric metadata.

September 2025

1 Commits • 1 Features

Sep 1, 2025

Month: 2025-09 — SciCatProject/frontend: Focused on delivering robust Proposal Datasets pagination and fixing related state handling to improve UX and reduce server load. Implemented frontend pagination flow by persisting skip/limit in datasetFilters, updating Redux actions/reducers, and adjusting component initialization to pass pagination params. This work enables correct server-side paging for proposal datasets and is backed by a clear commit (fc5fb19ba9f986d8be886b0b70f041b713698954).

March 2025

1 Commits

Mar 1, 2025

March 2025: Delivered a critical fix to MongoDB pagination in SciCatProject/scicat-backend-next, ensuring correct page results by applying $skip before $limit in the aggregation pipeline. Updated tests to reflect the corrected item counts. This change enhances data accuracy and reliability in paginated endpoints as data scales, reducing user-visible pagination errors and improving overall system trust.

February 2025

1 Commits • 1 Features

Feb 1, 2025

February 2025: Focused on API contract enhancement for dataset updates. Delivered partial update support to the Dataset API by introducing PartialUpdateDatasetDto in the PATCH v4 endpoint, enabling field-level updates and reducing risk of unintended overwrites. This sets the stage for more granular, efficient client interactions and improves API resilience.

January 2025

2 Commits • 1 Features

Jan 1, 2025

January 2025 performance summary for SciCatProject/scicat-backend-next: Focused on improving API documentation automation through OpenAPI tooling. Delivered OpenAPI-driven documentation enhancements by refactoring DTOs and schema definitions to leverage the OpenAPI CLI plugin, replacing ApiProperty decorators with JSDoc comments to improve automatic API docs generation and cross-module consistency. These changes streamline maintenance, improve API discoverability for clients, and accelerate onboarding for new developers and front-end teams. No major bugs reported this month; activities centered on feature delivery and long-term maintainability.

December 2024

1 Commits

Dec 1, 2024

December 2024 monthly summary for SciCat backend work focused on tight alignment between API schema and dataset DTO validation, delivering a targeted fix that improves data integrity and API contract reliability.

Activity

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Quality Metrics

Correctness91.6%
Maintainability89.2%
Architecture86.2%
Performance83.0%
AI Usage26.2%

Skills & Technologies

Programming Languages

HTMLJSONJavaScriptSCSSTypeScript

Technical Skills

API DesignAPI DevelopmentAngularBackend DevelopmentDatabase ManagementESLintFrontend DevelopmentMongoDBNestJSOpenAPIRxJSState ManagementTestingTypeScriptUI/UX design

Repositories Contributed To

2 repos

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

SciCatProject/scicat-backend-next

Dec 2024 Mar 2026
5 Months active

Languages Used

TypeScriptJavaScript

Technical Skills

API DesignBackend DevelopmentTypeScriptAPI DevelopmentNestJSOpenAPI

SciCatProject/frontend

Sep 2025 Mar 2026
3 Months active

Languages Used

JavaScriptTypeScriptHTMLJSONSCSS

Technical Skills

AngularFrontend DevelopmentRxJSState ManagementTypeScriptfront end development