The world of technology is moving fast – artificial intelligence, cloud computing, mobile app development, and distributed systems are changing how we build software. In such a dynamic environment, it’s important to know which programming languages are most valued today and which offer the best career growth opportunities.
Based on the latest data from the TIOBE Index and industry trends, we’ve created a list of the TOP 10 most popular programming languages in 2025. See which technologies are leading the market and why you should learn them!
Enjoy the read.
The most popular programming languages in 2025
In 2025, programming trends reflect a balance of proven stability and modern innovation. Python leads the pack with its dominance in AI, automation, and backend development. JavaScript and TypeScript remain essential for web development, while Java, C#, and SQL continues to power enterprise and data systems.
Rising stars like Rust and Go gain traction in system and cloud-native development, and Kotlin and Swift dominate mobile platforms.
Top 10 programming languages in 2025:
- Python
- JavaScript
- TypeScript
- Java
- Rust
- Go
- C#
- SQL
- Kotlin
- Swift
Discover the top 10 programming languages in 2025
Are you curious which programming languages are the most popular in 2025? And is your favorite still in the top spots?
With AI and cloud tech evolving fast, it’s important to stay up to date with the tools developers use most.
Based on the June 2025 TIOBE index, we’ve put together a list of the top 10 most popular programming languages this year.
Top 10 programming languages in 2025
1. Python
Use cases: AI/ML, backend, automation – overall leader
Python remains the top language in our ranking once again. Although it was created over 30 years ago, it still plays a key role in building some of the world’s most popular apps – from YouTube and Instagram to Spotify and Pinterest.
Thanks to its simplicity, versatility, and huge ecosystem, Python is one of the most in-demand languages for both companies and IT recruiters. In the June 2025 TIOBE Index, it took first place again, clearly ahead of the competition.
According to data from our latest report, IT specialists working with Python earn in Poland between 6,970 PLN and 32,820 PLN, depending on their experience level.
Want to learn more about IT salaries in Poland? Download our latest report.
2. JavaScript
Use cases: Frontend + backend (Node.js) – web dominance
JavaScript is a key programming language widely used to create interactive websites, apps, and games. Popular frameworks like React and Angular have made it the foundation of modern, complex user interfaces.
With strong community support and a rich library ecosystem, working with JavaScript is fast and efficient. Its versatility keeps the demand for JavaScript experts high.
3. TypeScript
Use cases: Modern, typed JS – growing in large projects
TypeScript is a modern extension of JavaScript that adds static typing and extra tools to help build bigger, more complex apps. It works with JavaScript and helps catch errors while coding, making it very popular for large projects.
It’s especially valued in frontend development – frameworks like Angular, React, and Vue are increasingly built with TypeScript in mind. Using it helps organize code better, improve safety, and make apps easier to scale.
4. Java
Use cases: Reliable choice for enterprise and Android
Java is one of the oldest and most proven programming languages. For years, it has been the foundation of many corporate systems, mobile apps (especially Android), and backend solutions. Its main strengths are reliability, cross-platform support (“write once, run anywhere”), and a large ecosystem of tools and libraries.
Thanks to regular updates and strong community support, Java remains the top choice for many companies in finance, e-commerce, and telecommunications. Its stability and maturity make Java developers consistently valued in the job market.
According to our latest report on developer recruitment, polish IT specialists working with Java earn between 7,330 PLN and 34,911 PLN, depending on their experience level.
5. Rust
Use cases: Growing in systems, memory safety
Rust is a modern programming language gaining popularity for its focus on memory safety and high performance. Designed for building reliable and fast system software, Rust avoids common issues like memory management problems often found in languages like C and C++.
Thanks to its speed and safety, Rust is increasingly used in operating systems, data processing, as well as modern cloud and blockchain applications. Its rising popularity means Rust developers are in high demand today.
6. GO (Golang)
Use cases: Backend, microservices, DevOps – simplicity and scalability
Go (Golang) is a simple, efficient language created by Google, perfect for building fast, scalable apps—especially in the cloud and microservices. It combines high performance with clear code, making it popular in DevOps, backend, and system tools. With built-in support for concurrency and a fast compiler, Go is gaining more recognition among software engineers.
7. C#
Use cases: Games (Unity), .NET, desktop/web apps
C# is a modern programming language created by Microsoft, widely used for building desktop apps, web apps, and games (mainly with the Unity engine). It combines clear syntax with powerful features and offers a rich ecosystem and tools through the .NET platform.
Thanks to continuous development and Microsoft’s support, C# remains a popular choice in corporate environments and the gaming industry, with strong demand for C# developers.
8. SQL
Use cases: Key in data analysis and databases
SQL (Structured Query Language) is a query language used to manage and analyze data in relational databases. It allows filtering, sorting, joining tables, and creating complex reports.
It’s an essential tool for data analysts, database administrators, and backend developers – anywhere access to well-organized data is crucial.
9. Kotlin
Use cases: Mobile (Android), modern alternative to Java
Kotlin is a modern JVM-based language valued for its conciseness, clarity, and easy code maintenance. It’s fully compatible with Java, and its smart compiler helps developers work faster.
With official Google support, Kotlin has become the default language for Android app development. If you’re planning to focus on mobile, Kotlin is a great choice.
10. Swift
Use cases: Building efficient apps for iOS, macOS, watchOS, and tvOS in the Apple ecosystem
Swift is a modern programming language created by Apple for developing apps on iOS, macOS, watchOS, and tvOS. It combines high performance with simple, readable syntax, making it friendly for both beginners and experienced developers.
With strong support from Apple and the growing popularity of mobile apps, Swift is now the main tool for developers working in the Apple ecosystem.
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