Free AWS practice exams: how to actually use them well
Most of us have wasted at least one practice exam. You sit down, blast through 65 questions, glance at the score, feel either great or terrible, and…
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Moving Lambda Logs to a Centralized Location [S3]
Moving Lambda Logs to a Centralized Location[S3] AWS Lambda gives you logs out of the box, but once an application starts growing, the real question…
A professional-grade website for under $5 a month
How I run my wife's clinic website https://naturlaskin.clinic on AWS with security, automation and the Well-Architected Framework built in from day…
Hands-On AWS: Spin Up IAM, S3 and a Jenkins Server on EC2 (and Fix What Breaks)
A step-by-step AWS lab with lots screenshots: create and delete an IAM user, host a site on S3, launch an EC2 server and run Jenkins on it, includin…
Athena read my timestamps as UTC. It didn’t tell me.
Nobody gets an error. Somebody gets blamed. I built a fake metal fab plant to find this kind of bug before a real customer does. Last week it caught…
AWS Lambda Web Functions: your HTTP server on Lambda, with real concurrency and active-CPU billing
On October 12, AWS launched Lambda Web Functions , and it's the biggest change to Lambda's programming model in years. Instead of writing a handler…
Dockerized Mail Capture for AWS CI Pipelines
Email verification tests become unreliable when every CI job reads from the same inbox. A message from a previous run can look valid, a retry can co…
Temporal Policies in AgentCore: 98 Denied Deploys and a 409 That Never Came
I asked a Strands agent for something reasonable: “run the tests and deploy.” It issued run_tests and deploy in the same turn, and the Gateway rejec…
I built a customer support agent on Amazon Bedrock AgentCore — and it refused to say my name
I spent ten years in asset management, most of it translating what portfolio managers and quants built into something clients could actually follow.…
One Glue Job, Zero Orchestrators — My First Spark Declarative Pipeline on AWS Glue
Disclaimer This is an independent, personal write-up — not official AWS content, and not endorsed by or affiliated with AWS. It documents a hobby pr…
AWS Launches Serverless AI Runtime: No Code, Just Compute
Amazon Web Services (AWS) has officially unveiled its new Serverless AI Runtime, a major update to its cloud computing service that promises to elim…
AWS Certified AI Practitioner AIF C01 Study Notes
A practical revision guide for choosing AWS AI and ML services, approaches, and controls I made these notes to revise the choices the exam repeatedl…
AWS Test Mailboxes Need a Cost and TTL Budget
An AWS test mailbox is a cloud resource, not just a test detail. Give each run a lease, a TTL, and a cleanup owner before CI starts creating disposa…
From Finance to AI Engineering: 6 lessons I learned building a Multi-Agent Support system on Amazon Bedrock AgentCore
After ten years in asset management, I started a full-stack developer path in 2024 and spent my time between blockchain and AI. Becoming an AI engin…
Optimizing Kubernetes Cluster Costs: Spot Instances, Autoscaling, and Resource Quotas
Introduction & Industry Context In the competitive landscape of 2026, managing cloud infrastructure is no longer merely a system engineering con…
I replaced theoretical study with high-intensity practice — and the result? I passed the AWS Solutions Architect Associate exam.
As I progressed through my AWS learning journey, I went from being familiar with EC2 to working with services like Lambda, IAM, VPC, RDS, DynamoDB,…
Zero-Downtime PostgreSQL Upgrade: RDS Blue/Green from version 13 to version 18
PostgreSQL has been the most popular open source database since 2020 and matured over decades. Many organization have already started migrating thei…
Cut LLM Document-Extraction Cost by 85% Without Losing Accuracy
Most production LLM extraction pipelines route every field through a frontier model, every time. It works, and for a while nobody questions the bill…
Kubernetes 1.34 End of Life: What Actually Happens on EKS, GKE, and AKS
Kubernetes 1.34 reaches end of life upstream on October 27, 2026 . If you run it on EKS, GKE, or AKS, that date by itself changes very little. Each…
I Tested Amazon S3 Vectors' New Pre-Filtering Against Exact Ground Truth
A filtered vector query that asks for 10 results can come back with 2, and nothing errors. AWS's own launch post shows exactly that on a CLASSIC ind…
Hybrid Search and Reranking: What Each One Actually Buys You
Enterprise RAG Engineering — Part 2 of 3 Where Part 1 Left Off Part 1 argued that most enterprise RAG systems fail at the ingestion layer, before a…
The ML you need to operate LLMs, not train them
You do not need to understand backpropagation to run a large language model well in production. You need a smaller, more practical thing: the operat…
I Found a Cost Blind Spot in an Open-Source Agent Framework
I Found a Cost Blind Spot in an Open-Source Agent Framework I was building cost attribution for AI agents on AWS when I ran into a gap in the open-s…
Amazon EKS: More Control Over the Kubernetes Control Plane
Introduction One of the main perks of Amazon EKS is that AWS manages the Kubernetes control plane for you. You do not have to operate components lik…
AWS CI Email Fixtures Need a Promotion Gate
Email fixtures are easy to add to a CI job and surprisingly hard to operate after that job becomes part of a release process. A test can pass while…
tf-nag: offline AWS Solutions checks for Terraform plans
tf-nag is an offline Python CLI that checks Terraform plan or state JSON against the tf-nag AWS Solutions rules. It does not contact AWS. Rule IDs a…
Kubernetes Email Jobs Need a Cleanup Owner
Email fixtures are easy to add to a CI pipeline and surprisingly hard to retire. A test creates a disposable inbox, starts a Kubernetes Job, waits f…
Cutting AWS Storage Costs: S3 Tables vs. S3 Express One Zone
Last year, my team was fighting the "small file problem" in a standard S3 bucket. We were running massive Glue jobs that spent 40% of their executio…
Data transfer is the AWS line item everyone underestimates
Data transfer costs are the most consistently underestimated line item in AWS They're not the biggest cost in most accounts. But they're the one tha…
Serverless vs Containers: A Cost Analysis with Real Numbers
September 2026 | ~16 min read The $12,400 Surprise We ran the same REST API on both Lambda and ECS Fargate for 3 months. Lambda cost $87/month at lo…