Devansh Jethmalani is a software engineer based in Mumbai with eight years of hands-on experience building front-end systems and contributing to open source. He combines freelance and hobbyist work with professional roles, recently joining LightBox after front-end positions at IV Consultancy and internships at grofleX and Servify. Devansh has a strong TypeScript and React focus—his notable open-source contributions include fixes and devtools improvements to popular projects like Zustand and type-safety work in DefinitelyTyped for Jest and Express. Comfortable across the full front-end stack, he’s skilled at refactoring, resolving deprecations, and tightening type definitions to make libraries safer for downstream users. His background as a long-term independent contributor adds an entrepreneurial, user-focused mindset to team-based product work.
8 years of coding experience
1 year of employment as a software developer
Bachelor of Engineering - BE, Computer Science, Bachelor of Engineering - BE, Computer Science at Thadomal Shahani Engineering College
Contributions:196 reviews, 25 commits, 33 PRs in 11 months
Contributions summary:Devansh primarily focused on enhancing the `devtools` middleware within the Zustand library, a state management solution for React. Their work involved refactoring the `devtools` implementation, addressing deprecation warnings, and ensuring compatibility. They also fixed bugs, incorporated new features, and updated the codebase to align with the latest changes and best practices of the library. Further contributions include fixing TypeScript types and addressing issues in context-related features.
The repository for high quality TypeScript type definitions.
Role in this project:
QA Engineer / Test Automation Engineer
Contributions:11 reviews, 7 commits, 9 PRs in 2 years 5 months
Contributions summary:Devansh contributed to the `DefinitelyTyped` repository, primarily focusing on improvements and fixes related to type definitions for the Jest testing framework and express.js. The user made changes to the type definitions, updated test files, and addressed issues related to generics, response types, and ensuring type safety in various scenarios. The contributions highlight a focus on maintaining the accuracy and completeness of type definitions within the project.
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Devansh Jethmalani - Software Engineer at Self-employed