Marcell Toth is a .NET developer and team lead with 12 years of experience building full-stack web applications, specializing in React, TypeScript and Microsoft technologies. Based in Hungary, he blends backend .NET expertise with modern front-end practices, having shipped UI improvements and robust request-handling features for API documentation tools. An active open-source contributor, Marcell has improved TypeScript type definitions in the high-profile DefinitelyTyped repo and enhanced request-maker flows and integration tests in Stoplight’s Elements project. He brings practical experience modernizing codebases to ES2019 standards, adding component stories and strengthening parameter/path resolution. Known for attention to type safety and test coverage, he combines hands-on coding with team leadership to deliver reliable, well-documented developer-facing features.
Build beautiful, interactive API Docs with embeddable React or Web Components, powered by OpenAPI and Markdown.
Role in this project:
Full-stack Developer
Contributions:219 reviews, 7 commits, 142 PRs in 5 days
Contributions summary:Marcell primarily focused on enhancing the request maker functionality within the API documentation project. They refactored code to improve path handling and parameter resolution, fixed bugs related to response status and empty responses, and added integration tests. Furthermore, the user implemented improvements to the UI and updated dependencies to use modern ES2019 features. The user also added stories for the request-maker components.
The repository for high quality TypeScript type definitions.
Role in this project:
Full-stack Developer
Contributions:14 reviews, 6 commits, 9 PRs in 8 months
Contributions summary:Marcell primarily contributed to improving and extending TypeScript type definitions within the repository. They focused on adding and refining type definitions for several libraries, including `parse-prefer-header`, `urijs`, `openapi-sampler`, `json-schema-generator`, and `httpsnippet`, alongside improving the `har-format` types. These contributions involved modifying existing type definitions and creating tests to ensure accuracy, demonstrating a strong understanding of TypeScript and type definition best practices within a project focused on TypeScript type definitions.
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