The developers launched ParovoJSik, a training platform for JavaScript and TypeScript job interviews. The service covers frontend, backend, and full-stack development, addressing a lack of comprehensive Russian-language resources.
The platform currently features 20 tasks focusing on core language concepts and algorithms. Each task includes a problem description, progressive hints, step-by-step solutions, common pitfalls, and automated tests to verify user code.
During development, the team optimized test execution by replacing setTimeout with MessageChannel. This change resolved performance issues caused by browser timer throttling in background tabs, reducing test duration from seconds to milliseconds.
The roadmap for the platform includes adding theoretical modules on event loops, closures, prototypes, and TypeScript types. Future updates will introduce system design topics and expanded tasks for Node.js, HTTP, and data handling.
