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We Replaced Jest With node:test in 12 Services — Here's What Broke and What Didn't

After months of using Jest for unit testing, we decided to take the plunge and migrate to the built-in node:test runner. The results were surprising, …

nodetestinglambdajest
Dev.to May 29, 2026, 06:39 UTC
EN

Building a Production Serverless URL Shortener on AWS — 21 Articles, Every Test Run for Real

Most serverless tutorials stop at a hello-world Lambda behind API Gateway. I wanted the opposite: build one real product end to end, run every command…

serverlesslambdaawsdevops
Dev.to May 26, 2026, 00:40 UTC
EN

S3 Files Killed My Least Favorite Lambda Pattern

Every Lambda function I have written that touches S3 has the same three lines of plumbing: s3 . download_file ( bucket , key , " /tmp/input.csv " ) pr…

awss3lambdacloud
Dev.to May 21, 2026, 10:26 UTC
EN

Lambda Execution Roles Are Quietly Breaking Your Least Privilege Policy

Who This Is For If you are using AWS Lambda to build serverless applications and you have never stopped to look closely at the IAM roles attached to y…

awsserverlesslambdasecurity
Dev.to May 21, 2026, 05:26 UTC
EN

Building a Low-Cost Image Converter on AWS With Rust Lambda

Project demo link : https://image-ignite.vercel.app/ This started as a hobby project. I was thinking about a simple image conversion service for resiz…

lambdarustcargo
Dev.to May 17, 2026, 18:24 UTC
EN

Automatically Healing CloudFormation Drift with Durable Functions

This article is a machine translation of the contents of the following URL, which I wrote in Japanese: Durable Functions を用いて CloudFormation のドリフトを自動修…

awslambdacloudformation
Dev.to May 17, 2026, 02:34 UTC
RU

Как работают lambda-функции в Python: замыкания, позднее связывание и антипаттерны

Вы всё ещё используете map и filter с лямбдами в 2026 году? Подготовил большой гайд по анонимным функциям в Python: от самого первого lambda x для нов…

lambdapythonpython3python 3python для начинающихpython tutor
Habr May 16, 2026, 13:37 UTC
EN

The Truth About Serverless APIs Nobody Mentions

I've noticed serverless conversations tend to split into two camps: People who think it solves everything, and people who think it's a mistake. The re…

awsserverlesslambdaarchitecture
Dev.to May 14, 2026, 19:11 UTC
EN

Bun on Lambda Is Faster Than Node.js 22 — But Is It Production Ready?

After running Bun on Lambda for 60 days, we discovered it's 3x faster than Node.js 22. However, the transition wasn't without its surprises. Here's wh…

lambdabunjsnodeserverless
Dev.to May 13, 2026, 02:05 UTC
EN

Build your own daily notification bot on AWS Free Tier

A Lambda function checks the forecast, Bedrock tells you what to wear, and ntfy.sh pushes it to your phone before you get ready for the day, and it's …

beginnerslambdaeventbridgetutorial
Dev.to May 8, 2026, 02:04 UTC
EN

Self-Hosted Vessel Email Alerts with AWS Lambda and SES

The thing you actually want is an email. Not a dashboard you have to remember to open. Not a webhook you have to write a server for. An email — the ki…

awslambdaseswebhooks
Dev.to May 6, 2026, 12:29 UTC

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