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Emil Gunnarsson

PROFILE

Emil Gunnarsson

Emil Gunnarsson contributed to the SciCatProject repositories by building and refining both backend and frontend features with a focus on API reliability and user experience. He enhanced the scicat-backend-next API by aligning DTO validation with schema contracts, introducing partial update support for datasets, and automating documentation using OpenAPI tooling and TypeScript. Emil also resolved MongoDB pagination issues by restructuring aggregation pipelines for accurate data retrieval. On the frontend, he implemented robust pagination for proposal datasets in the Angular-based SciCatProject/frontend, improving state management with RxJS and Redux patterns. His work demonstrated depth in API design, backend development, and frontend integration.

Overall Statistics

Feature vs Bugs

60%Features

Repository Contributions

6Total
Bugs
2
Commits
6
Features
3
Lines of code
582
Activity Months5

Work History

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

Correctness81.6%
Maintainability86.6%
Architecture80.0%
Performance73.4%
AI Usage20.0%

Skills & Technologies

Programming Languages

JavaScriptTypeScript

Technical Skills

API DesignAPI DevelopmentAngularBackend DevelopmentDatabase ManagementFrontend DevelopmentMongoDBNestJSOpenAPIRxJSState ManagementTestingTypeScript

Repositories Contributed To

2 repos

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

SciCatProject/scicat-backend-next

Dec 2024 Mar 2025
4 Months active

Languages Used

TypeScriptJavaScript

Technical Skills

API DesignBackend DevelopmentTypeScriptAPI DevelopmentNestJSOpenAPI

SciCatProject/frontend

Sep 2025 Sep 2025
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

AngularFrontend DevelopmentRxJSState Management

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