The reconnect storm that never touched the broker
There's a particular kind of 2 a.m. that only happens in fleet IoT. A slice of your devices — a few thousand of them — drop off the network at once. B…
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Integrating Lambda Durable Functions into a Step Functions Workflow
At re:Invent 2025, AWS announced Lambda Durable Functions . The feature introduces a checkpoint/replay mechanism that allows Lambda executions to run …
"Error: Cannot find module 'aws-sdk'" on Lambda — migrating to @aws-sdk v3
If you upgraded a Lambda function from nodejs16.x to nodejs18.x (or nodejs20.x / nodejs22.x ) and your logs now show: Runtime.ImportModuleError: Error…
Building a worker-evaluator retry loop in LangGraph (and where it bites you on Lambda)
Most agent demos stop at "the model called a tool and gave an answer." That answer is often wrong, and nothing in the loop notices. I wanted an agent …
Serverless image pipeline with aws lambda+node+wasm: from 11.5mb to 91.2kb
A while back I needed to process thousands of images for an e-commerce platform: multiple versions per product, carousel, thumbnail, invoice miniature…
I Built a Serverless VPN on Lambda MicroVMs — 12 Builds, 5 Dead Ends, 1 Working Architecture
TL;DR I built a personal VPN using AWS Lambda MicroVMs. Your traffic exits from AWS. When you disconnect, the MicroVM terminates — zero cost, nothing …
3- AWS Serverless: REST API vs. HTTP API
There is common point of confusion. what's the different between REST API vs. HTTP API in AWS and what's the different between them and a traditional …
1- AWS Serverless: Designing a serverless API: Order Processing API (E-commerce)
Modern enterprise order processing architectures must decouple synchronous client demands from asynchronous backend dependencies. Here I'll detail a h…
Triggering Lambda Durable Functions from SQS
Lambda durable functions, introduced in re:Invent 2025, are a great fit for long-running workflows that need to wait for external events, callbacks, o…
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…
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…
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…
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…
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…
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 …
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…