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Simple SST App - Serverless-stack Typing CST Test
Simple SST App — Serverless-stack Code
A simple SST app creating an API and Lambda function.
# sst/demo/app.ts
import * as sst from '@serverless-stack/resources';
export default class MyStack extends sst.Stack {
constructor(scope, id, props) {
super(scope, id, props);
const api = new sst.Api(this, 'Api', {
routes: {
'GET /hello': new sst.Function(this, 'Lambda', {
handler: 'functions/hello.main'
})
}
});
this.addOutputs({
ApiEndpoint: api.url
});
}
}Serverless-stack Language Guide
Serverless Stack (SST) is an open-source framework for building full-stack serverless applications on AWS. It provides a development environment with Live Lambda Reloading, infrastructure-as-code using SST constructs (powered by AWS CDK), and seamless integrations for APIs, databases, authentication, and frontends.
Primary Use Cases
- ▸Building serverless APIs
- ▸Full-stack apps using AWS Lambda + DynamoDB
- ▸Event-driven architectures using SQS, SNS, EventBridge
- ▸Real-time apps using WebSocket or API Gateway
- ▸Deploying React/Next.js frontends with backend integration
Notable Features
- ▸Live Lambda Reloading
- ▸SST Constructs built on AWS CDK
- ▸Cross-stack references simplified
- ▸Built-in frontend hosting
- ▸Strong TypeScript support
Origin & Creator
Created by SST Inc. (initially by the team behind Seed.run) as an evolution of CDK-based serverless tooling.
Industrial Note
SST is used in high-scale serverless architectures where rapid iteration, cost efficiency, and fully managed AWS components are essential.
Quick Explain
- ▸SST simplifies serverless development by pairing CDK infrastructure with a high-productivity local dev environment.
- ▸Live Lambda Reloading lets developers instantly test Lambda changes without redeploying.
- ▸Provides opinionated yet extensible constructs for API, storage, queues, auth, and more.
- ▸Works seamlessly with React, Next.js, SvelteKit, Astro, and static frontends.
- ▸Ideal for modern cloud-native, scalable, pay-per-use applications.
Core Features
- ▸Infrastructure as code (CDK)
- ▸Lambda-based backend services
- ▸DynamoDB/Postgres guides and helpers
- ▸Auth constructs (Cognito, Auth0, custom)
- ▸Static site + Next.js deployments
Learning Path
- ▸Learn basics of AWS Lambda and API Gateway
- ▸Understand CDK constructs
- ▸Build simple SST APIs
- ▸Add DB + auth
- ▸Deploy full-stack app across environments
Practical Examples
- ▸CRUD API with DynamoDB
- ▸Next.js app with serverless backend
- ▸Real-time chat using WebSockets
- ▸ETL workflows with EventBridge + Lambda
- ▸Image upload pipeline using S3 + Lambda
Comparisons
- ▸SST vs AWS SAM - SST offers richer full-stack features
- ▸SST vs Serverless Framework - SST has Live Lambda + CDK power
- ▸SST vs Pulumi - SST is optimized for AWS serverless
- ▸SST vs CDK alone - SST provides higher-level constructs
- ▸SST vs Amplify - SST is more flexible and backend-centric
Strengths
- ▸Fast feedback loop with Live Lambda
- ▸Full-stack support (backend + frontend)
- ▸Strong TypeScript ecosystem
- ▸Simplifies complex AWS CDK patterns
- ▸Great documentation and community
Limitations
- ▸AWS-only (no multi-cloud)
- ▸CDK learning curve for beginners
- ▸Live Lambda mode not ideal for every workflow
- ▸Deployment speed still depends on CloudFormation
- ▸Not suited for extremely latency-sensitive workloads
When NOT to Use
- ▸If deploying to Google Cloud or Azure
- ▸If app needs <1ms latency
- ▸If fully offline/edge-only environment
- ▸If you want Kubernetes-based systems
- ▸If infrastructure must avoid CloudFormation
Cheat Sheet
- ▸sst dev - local development
- ▸sst deploy - production/stage deploy
- ▸Function -> SST Lambda wrapper
- ▸Api -> Create API Gateway endpoints
- ▸Table -> DynamoDB construct
FAQ
- ▸Can SST be used with Next.js? -> Yes, officially supported.
- ▸Do I need CDK knowledge? -> Basic understanding helps.
- ▸Is SST free? -> Yes, fully open-source.
- ▸Can I use SST without frontend? -> Yes, backend-only is common.
- ▸Does SST support monorepos? -> Yes, very well.
30-Day Skill Plan
- ▸Week 1: SST fundamentals + Lambdas
- ▸Week 2: Storage (S3, DynamoDB, RDS)
- ▸Week 3: Event-driven apps
- ▸Week 4: Frontend integration + auth
- ▸Week 5: Multi-stage deployments + IaC mastery
Final Summary
- ▸SST is a powerful framework for AWS serverless development.
- ▸Combines CDK infrastructure with fast development via Live Lambda.
- ▸Supports APIs, databases, authentication, and full-stack apps.
- ▸Ideal for cost-effective, scalable, cloud-native workloads.
- ▸Strong community and ecosystem support.
Project Structure
- ▸sst.config.ts (entry point)
- ▸packages/functions (Lambda code)
- ▸packages/core (shared utilities)
- ▸stacks/ (infrastructure)
- ▸frontend/ for UI frameworks
Monetization
- ▸Build SaaS on serverless
- ▸Use pay-per-use economics
- ▸Offer API-based products
- ▸Sell serverless consulting
- ▸Create automation tools
Productivity Tips
- ▸Use `sst dev` extensively
- ▸Split stacks logically
- ▸Use SST Console during debugging
- ▸Leverage CDK patterns
- ▸Bundle shared libraries with esbuild
Basic Concepts
- ▸Stacks and constructs
- ▸Live Lambda Reloading environment
- ▸Function, API, Table, Bucket constructs
- ▸Cross-stack linking
- ▸Deployment stages
Official Docs
- ▸https://docs.sst.dev/
- ▸AWS CDK documentation
- ▸Lambda & API Gateway best practices