# Could Someone Give me Advice for Integrating SST with an Existing Serverless Application?

**URL:** <https://discourse.sst.dev/t/could-someone-give-me-advice-for-integrating-sst-with-an-existing-serverless-application/2969>\
**Category:** General\
**Created:** [August 28, 2024, 7:09am UTC](https://discourse.sst.dev/t/could-someone-give-me-advice-for-integrating-sst-with-an-existing-serverless-application/2969 "2024-08-28T07:09:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![roberrttt](https://yyz2.discourse-cdn.com/flex032/user_avatar/discourse.sst.dev/roberrttt/32/1554_2.png) [@roberrttt](https://discourse.sst.dev/u/roberrttt)\
**Post date:** [August 28, 2024, 7:09am UTC](https://discourse.sst.dev/t/could-someone-give-me-advice-for-integrating-sst-with-an-existing-serverless-application/2969/1 "2024-08-28T07:09:58Z")

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Hello there,

I am working on integrating SST into an existing serverless application and could use some guidance on best practices. My application is built on AWS; utilizing Lambda; DynamoDB; API Gateway; and S3; with a deployment pipeline already set up using CI/CD. I have read through the SST documentation; but there are a few areas where I’m hoping to get some insights from those with experience in this domain.

My current application has a standard serverless.yml setup. How should I approach restructuring my project to incorporate SST? Should I migrate everything into SST at once; or is there a way to incrementally adopt SST? 🤔

One of the key reasons I am exploring SST is for its live Lambda debugging capabilities. Could anyone share their experiences with this feature; especially in terms of how it integrates with existing testing frameworks like Jest or Mocha? Are there any pitfalls I should be aware of? 🤔

My application is deployed across multiple environments. How does SST handle environment-specific configurations; especially when it comes to managing secrets and environment variables? 🤔

Also, I have gone through this post; [https://discourse.sst.dev/t/provide-sst-construct-for-api-gateway-integration-](https://discourse.sst.dev/t/provide-sst-construct-for-api-gateway-integration/2699)[mlops/](https://www.igmguru.com/machine-learning-ai/mlops-course-certification) which definitely helped me out a lot.

I am particularly interested in hearing about real world experiences and any lessons learned during the migration process.

Thank you in advance for your help and assistance. 😇