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Large Companies Are Switching to TypeScript: The Trend of 2025
2025 has become a turning point for the web development ecosystem. If just a few years ago TypeScript was perceived as an "add-on for enthusiasts," today it is a mandatory standard for corporate projects. Leading tech giants — from Microsoft and Google to Meta and Airbnb — have either fully converted their codebases to TypeScript or are in the final stages of migration. Let's break down why this is happening now and what it means for developers.
Why Are Companies Choosing TypeScript?
The main reason is scalability. In 2025, the complexity of frontend and backend systems has peaked: monolithic applications have given way to microservices, and the number of lines of code in large projects exceeds millions. JavaScript, with its dynamic typing, becomes a bottleneck: errors only appear at runtime, leading to costly incidents in production.
TypeScript solves this problem at its root:
- Static typing — 80% of typical bugs are caught at the compilation stage, not during application runtime.
- Better documentation — interfaces and types serve as a living code specification, simplifying onboarding for new developers.
- Integration with modern frameworks — React, Next.js, NestJS, and Angular are already optimized for TypeScript "out of the box."
- Faster refactoring — the IDE understands the project structure, allowing safe variable renaming and architecture changes in minutes, not days.
Who Has Already Switched?
The trend is set not only by IT giants. According to the State of JS 2024 report, 89% of professional developers use TypeScript in at least one project. In 2025, the following have joined this list:
- Stripe — rewrote its core payment engine from JavaScript to TypeScript, reducing production errors by 63%.
- Airbnb — completed a three-year migration of its server-side code, noting a 30% reduction in code review time.
- Microsoft — the language's developers are actively converting internal tools to TypeScript, including the VS Code editor and new Azure modules.
How Does This Affect the Job Market?
Demand for TypeScript developers in 2025 has grown by 45% compared to 2023. The average salary of a specialist proficient in TypeScript is 20-25% higher than that of a "pure" JavaScript developer. Moreover, employers increasingly list TypeScript knowledge as a mandatory requirement, not a "plus." Entering the market without this skill is becoming risky.
What's Next?
Experts predict that by 2027, TypeScript will become the de facto standard for all serious commercial development. JavaScript will remain for small scripts, prototypes, and educational projects, but the corporate world will fully transition to strict types.
Advice for developers: if you haven't learned TypeScript yet, now is the time to start. Even on PythonLib.ru, we notice that more and more readers are interested in comparing TypeScript with Python for backend development and typing tools. The trend of 2025 is not a fad, but the new reality of the industry.
Stay tuned for updates on PythonLib.ru — we continue to cover the most important
