I am an AWS certified solution architect. I can write lambdas in node as needed.
Your project does not define the complexity of the lambda needed. Hope we can chat so I can understand better the task required!
Regarding myself, I have greeat experience with lambda functions. I previously wrote lambdas for website authentication or to connect to a database and get/update values or connect to an API to perform a certain function, or image formatting. Anything is possible.
Hope we can chat and u let me know more about your project