The AWS Node.js execution runtime still uses Node 4.3, and many modern ES6 features are not available there (notably, imports and async/await). You can use Babel to transpile more modern ES6 code into ES2015.
This example shows how to create a trivial transpiled project and deploy it using Claudia.
The transpilation output folder (in this case bin) is excluded from version control in .gitignore, but explicitly listed in the files section of package.json, so it will be deployed by Claudia.