AWS Lambda supports multiple programming languages, allowing developers to use the language they are most comfortable with. AWS provides native support for some languages and also allows for custom runtimes to support others.
JavaScript (Node.js)
Python
Java
Go
C# (.NET Core)
Ruby
PHP
Rust
C++
Elixir
Swift
Any other language (with proper custom runtime configuration)
With the help of Lambda’s custom runtime feature, you can bring virtually any language to AWS Lambda by implementing the appropriate API interface using the Lambda Runtime API.
Performance requirements
Startup latency (cold start time)
Library and framework availability
Developer expertise
In most cases, Node.js and Python are preferred for their fast startup times and rich ecosystem of libraries, especially for event-driven or API-based workloads.