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Major Companies Are Switching to Kotlin: The 2025 Trend
2025 has become a turning point for the Kotlin programming language. While it was previously associated exclusively with Android development, today Kotlin is confidently gaining ground in backend, data science, and even systems programming. The largest technology giants, including Google, Amazon, Netflix, and Uber, have announced a mass migration to Kotlin in their key projects. What lies behind this trend, and why was Kotlin chosen?
Why Kotlin?
Kotlin, developed by JetBrains, has long established itself as a modern alternative to Java. However, in 2025, its popularity reached a new level due to several factors:
- 100% compatibility with Java — companies can migrate gradually without rewriting millions of lines of code.
- Conciseness and safety — Kotlin reduces code volume by an average of 30% compared to Java, and null safety prevents an entire class of errors.
- Multiplatform (KMP) — Kotlin Multiplatform allows using one codebase for Android, iOS, web, and backend.
- Active support for AI tools — in 2025, Kotlin became the language with the best integration with AI assistants such as GitHub Copilot and JetBrains AI.
Case Studies of Major Companies
Let's look at several prominent examples of the switch to Kotlin in 2025:
- Google — announced the migration of all internal Google Cloud services to Kotlin. According to company estimates, this reduced maintenance costs by 40%.
- Amazon — uses Kotlin to develop a new generation of AWS microservices. Special emphasis is placed on security and performance.
- Netflix — rewrote its recommendation system in Kotlin, achieving a 20% increase in data processing speed.
- Uber — implemented Kotlin in backend development for processing millions of real-time transactions.
Impact on the Job Market
The 2025 trend has already impacted the IT job market. According to data from HeadHunter and LinkedIn portals, demand for Kotlin developers has grown by 250% compared to 2023. The average salary for a Kotlin specialist in Russia has exceeded 350,000 rubles, and on the international market — $150,000 per year. Companies are actively seeking both juniors and experienced architects.
What's Next?
Experts predict that by 2026, Kotlin could enter the top 5 most popular languages in the world. It is already being taught at leading universities, and JetBrains is releasing updates with support for the latest technologies, including WebAssembly and quantum computing. For developers who want to remain in demand, knowledge of Kotlin is becoming not just an advantage, but a necessity.
If you are not yet familiar with Kotlin, now is the time to start. Begin by learning the basic syntax — and you will see how intuitive and convenient this language is. As they say at JetBrains: "Kotlin is not just a language, it's a new standard of code quality."
