Lambda supports Java, JavaScript, C#, and Python directly. If you really must use some other code in another language, there’s a good chance that it can be emulated by JavaScript or Java.

AWS has unveiled Lambda SnapStart for Python and .NET, enhancing serverless app performance by reducing cold start latency. This feature builds on the success of Lambda SnapStart for Java ...

AWS today announced Lambda SnapStart, a new feature of its serverless platform that virtually eliminates cold start times.