You still don’t know TypeScript? Good luck getting hired.

TypeScript isn’t "bonus" anymore. It’s the default for every stack that scales. And yet, most devs still skip it.

TS is the new JS

In 2025, calling yourself a JavaScript developer without TypeScript is like calling yourself a race car driver because you own a bicycle. Yes, technically you’re on the same road—but no one's giving you the keys to the enterprise engine.

According to the 2024 State of JS survey, 78% of developers now use or plan to adopt TypeScript. GitHub's annual Octoverse report shows TypeScript is one of the top 5 fastest-growing languages globally, consistently climbing the charts over the last five years. Google, Microsoft, Slack, Airbnb, and Stripe are all using TypeScript as standard in production. So the real question isn't "Should I learn TypeScript?" It's: "What am I actually doing if I haven't already?"

At Kaz Software, we adopted TypeScript early not because it was trendy but because it saved our developers' sanity. When you're dealing with multiple teams working across shared codebases, type safety becomes a necessity, not a luxury. It catches bugs before they reach QA. It makes onboarding smoother. It adds self-documentation that saves hours every week. The gap between "I can code" and "I can ship clean, production-ready features" is TypeScript. In our interviews, when a candidate says they're comfortable writing TypeScript, it's more than a skill—it's a signal. A signal they think ahead. That they care about code quality. That they want to work on teams that scale.

The web may run on JavaScript, but teams, products, and companies now run on TypeScript. If you're still resisting, it’s not a tech choice—it's career sabotage.

Errors caught = time saved = promotions

Every developer knows this: the earlier a bug is caught, the cheaper it is to fix. But in 2025, TypeScript doesn't just catch bugs early. It prevents the kind of mistakes that derail releases, delay sprints, and burn out teams. A 2025 GitHub Engineering Pulse study reported a 38% decrease in post-merge production issues for teams using TypeScript over plain JavaScript. Why? Because types create guardrails. You don't wonder what a function takes. You don't guess what a response returns. You know. The compiler enforces it.

In Kaz Software's dev teams, TypeScript became our sanity layer. We don’t ship code wondering if it'll break in integration. We trust our types to expose edge cases during PRs instead of during hotfixes. The result? Happier QA, smoother sprint planning, and a faster dev cycle overall.

Beyond code stability, TypeScript also becomes your second brain. New devs onboard faster because the types explain the code. Seniors write less documentation because types serve as inline guidance. And when you’re maintaining a project 8 months later? Type annotations feel like your past self leaving breadcrumbs through a forest of logic. Promotions don’t come from how many lines of code you write. They come from how little chaos you introduce into the system. TypeScript makes that your default.

So if you're still arguing it's "extra work," you're thinking small. TypeScript doesn’t slow you down. It prevents you from being the reason your team gets stuck. In a competitive dev market, that’s the kind of invisible value that gets you noticed—and moved up.

Why every "nice stack" has TypeScript in it

Let’s look at the real-world tech stacks in 2025. You’ll notice something fast: the stacks that make devs smile all run on TypeScript. React with TypeScript. Next.js with TS configs out-of-the-box. NestJS built TypeScript-first. tRPC? Type inference from back to front. Even Deno launched with TypeScript at its core. These aren't coincidences. These are engineering trends driven by scale, complexity, and the demand for reliability. Whether you’re working on a hobby SaaS or a fintech platform—type-safe code lets teams move fast without breaking everything. That’s why TypeScript is part of the modern dev stack.

At Kaz Software, TypeScript is in nearly every project we scale. From enterprise APIs built in NestJS to cross-platform apps integrating React Native, the shared thread is TypeScript. It helps us keep velocity without sacrificing quality—something we care deeply about.

Here’s the thing: tools come and go. Frameworks get replaced. But when a language becomes the foundation for multiple successful ecosystems, that’s not a trend. That’s a shift. TypeScript is that shift. If you’re learning frameworks and skipping TypeScript, you’re building speed on sand. And hiring managers can tell. They don’t care that you know 14 libraries. They care whether you can build something that lasts. TypeScript is not the future because it's flashy. It's the future because it's boring in the best way: predictable, scalable, readable. And when you're working on code with 5 other devs across 6 time zones—that’s exactly what you want.