AWS on Lonfo Blog

Daily Actions: Read your data back with a DynamoDB Query behind GET /actions

Tue, 20 Oct 2026 09:00:00 +0200

Daily Actions: Read your data back with a DynamoDB Query behind GET /actions

In the previous article, our users learned to write: a signed-in user sends an action to POST /actions, a Lambda stores it in DynamoDB, and anonymous requests are rejected. But if you add a task and refresh the /todo page, the list stays empty. Nothing reads the data back.

In this article we add the missing half: a GET /actions endpoint that returns only the actions of the signed-in user, using a DynamoDB Query.

Daily Actions: Save data in DynamoDB through an API Gateway and Lambda secured by Cognito

Tue, 13 Oct 2026 09:00:00 +0200

Daily Actions: Save data in DynamoDB through an API Gateway and Lambda secured by Cognito

In the previous article, our static Next.js application learned to authenticate users with Amazon Cognito. But a login page protects nothing by itself: as long as our backend accepts anonymous requests, anyone can write into our database.

In this article we connect the pieces. The signed-in user will send a new action to an API Gateway endpoint, a Lambda function will insert it into DynamoDB, and only requests carrying a valid Cognito token will get through.

Daily Actions: Secure your Next.js application with AWS Cognito and CDK

Fri, 25 Sep 2026 08:15:36 +0200

Daily Actions: Secure your Next.js application with AWS Cognito and CDK

Now that our Next.js application is live on S3 and CloudFront, it’s time to add an essential component: authentication. With a static export architecture, traditional server-based solutions (like NextAuth.js with Node.js API routes) do not work directly.

We will use AWS Cognito to manage our users (User Pool) and integrate the AWS SDK (or Amplify) on the front-end to connect our static application securely. CDK handles all the infrastructure configuration.

How to Design a High-Performance DynamoDB Table

Mon, 14 Sep 2026 12:25:40 +0100

How to Design a High-Performance DynamoDB Table?

Introduction

If you are coming into the world of DynamoDB with a relational background (PostgreSQL, MySQL, Oracle), forget everything you know. The first mistake 90% of developers make is designing a NoSQL database like a SQL database: creating tables per entity, excessively normalizing, and hoping to run clean JOIN later.

Result? It is a guaranteed crash in production: collapsing performance, exploding AWS costs, and impossible queries.

Daily Actions: Next.js on AWS (Static Export): S3 + CloudFront in minutes with CDK

Sun, 05 Apr 2026 10:00:00 +0100

Next.js on AWS (Static Export): S3 + CloudFront in minutes with CDK

Hosting a Next.js app statically on AWS uses the same building blocks: a private S3 bucket for files, CloudFront for global delivery, and OAC to restrict direct S3 access. We automate everything with the AWS CDK in TypeScript, without depending on Route 53.

This guide scaffolds a Next.js app (static export), then deploys the exported output (out/) to S3 behind CloudFront in one command.

Angular Deployment on AWS: The Ultimate S3 + CloudFront Guide with CDK

Sat, 17 Jan 2026 09:42:26 +0100

Angular Deployment on AWS: The Ultimate S3 + CloudFront Guide with CDK

Deploying an Angular Single Page Application (SPA) on AWS doesn’t have to be complicated. Forget manual console configuration; we are going to build a Serverless infrastructure, secured by OAC and optimized by CloudFront, all without depending on Route 53.

Tutorial Objectives

Organize a global project structure (Frontend + Infra).
Create a private S3 bucket for storage.
CConfigure CloudFront for HTTPS and Angular routing.
Deploy everything with a single command.

Prerequisites

Before starting, you will need:

Give memory to your API: Build a complete CRUD with DynamoDB and CDK

Fri, 14 Nov 2025 12:25:40 +0100

Give memory to your API: Build a complete CRUD with DynamoDB and CDK

In the previous articles, we gradually introduced you to serverless, starting with the creation and deployment of a Lambda function in the first article, followed by the addition of an API Gateway to trigger the Lambda in the second article. In both cases, the returned data consisted of simple mock responses. You have therefore acquired a solid foundation to move on to the next level: data persistence. As stated in the title, we will use DynamoDB and remain within the same approach: the discovery of AWS CDK.

Build your first serverless API with API Gateway and Lambda function using CDK and TypeScript

Thu, 23 Oct 2025 20:35:01 +0100

Build your first serverless API with API Gateway and Lambda function using CDK and TypeScript

Serverless is one of the most powerful approaches for building fast ,scalable and cost effective applications . In this article, I will walk you through building a simple API with two endpoints in under 10 minutes . We will leverage AWS lambda and Amazon API Gateway, deploying the entire infrastructure using AWS CDK with TypeScript.

Hello World Serverless : Deploy an AWS Lambda Function with CDK and TypeScript

Mon, 06 Oct 2025 20:59:13 +0100

Hello World Serverless : Deploy an AWS Lambda Function with CDK and TypeScript

Serverless has become one of the most popular approaches for building fast, scalable and cost-effective applications. With AWS Lambda you only focus on writing code and AWS takes care of everything else: scaling, servers and availability.

But there is a tool taht makes the experiences even better : AWS CDK. It allows you to define your infrastructure using familiar programming languages such as TypeScript, Java, Python,C# or Go, instead of writing raw of CloudFormation template.