https://ahmadx.dev/posts/Recent content in Posts on Ahmad Hassanhttps://ahmadx.dev/assets/opengraph.webphttps://ahmadx.dev/assets/opengraph.webpHugo -- 0.140.2en-usAhmad HassanSun, 15 Feb 2026 00:00:00 +0000https://ahmadx.dev/posts/cap-theorem/Sun, 15 Feb 2026 00:00:00 +0000https://ahmadx.dev/posts/cap-theorem/<p><img alt="|715x436" decoding="async" loading="lazy" src="https://ahmadx.dev/posts/assets/img-6.webp"></p> <p>CAP theorem is one of those ideas everyone knows, but very few actually design with. And that’s because it’s usually taught as a formula, not as a pressure situation.</p> <p>So let’s do this the system designer way.</p> <p>Assume you’re building a distributed system. Not a single server, not a single database. Multiple nodes, multiple machines, talking over a network. The moment you distribute a system, one thing becomes inevitable: things will fail. Machines crash. Networks slow down. Packets get lost. You don’t get to opt out of this.</p>https://ahmadx.dev/posts/event-driven-architecture/Sun, 15 Feb 2026 00:00:00 +0000https://ahmadx.dev/posts/event-driven-architecture/<p><img alt="|715x288" decoding="async" loading="lazy" src="https://ahmadx.dev/posts/assets/img-4.webp"></p> <p>Let’s talk about Event Driven Architecture.</p> <p>Imagine you are building an e-commerce platform. A customer places an order. What all should happen? Payment should be processed. Inventory should be updated. Email confirmation should be sent. Analytics should record the purchase. Maybe fraud detection should run.</p> <p>Now tell me honestly, should Order Service directly call all these services one by one? What happens if Email Service is down? Should order placement fail? What if Analytics is slow? Should customer wait? This is where tight coupling starts hurting.</p>https://ahmadx.dev/posts/microservice-architecture/Sun, 15 Feb 2026 00:00:00 +0000https://ahmadx.dev/posts/microservice-architecture/<p><img alt="|715x402" decoding="async" loading="lazy" src="https://ahmadx.dev/posts/assets/img-5.webp"></p> <p>Let’s talk about microservice architecture</p> <p>Look at the diagram first. Don’t read labels yet. Just observe the flow.</p> <p>A client sends a request. That request does not directly hit business logic. It first goes through an API Gateway. From there, the request fans out to multiple independent services, and those services interact with the database.</p> <p>That structure itself tells a story. Now let’s rewind and start from the problem.</p>https://ahmadx.dev/posts/aws-ccp-other-services/Sat, 31 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-other-services/AWS Certified Cloud Practitioner notes on Other Serviceshttps://ahmadx.dev/posts/aws-ccp-advanced-identity/Fri, 30 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-advanced-identity/AWS Certified Cloud Practitioner notes on Advanced Identityhttps://ahmadx.dev/posts/aws-ccp-account-management-billing-support/Thu, 29 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-account-management-billing-support/AWS Certified Cloud Practitioner notes on Account Management, Billing &amp; Supporthttps://ahmadx.dev/posts/aws-ccp-machine-learning/Wed, 28 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-machine-learning/AWS Certified Cloud Practitioner notes on Machine Learninghttps://ahmadx.dev/posts/aws-ccp-security-compliance/Tue, 27 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-security-compliance/AWS Certified Cloud Practitioner notes on Security &amp; Compliancehttps://ahmadx.dev/posts/aws-ccp-vpc-networking/Mon, 26 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-vpc-networking/AWS Certified Cloud Practitioner notes on VPC &amp; Networkinghttps://ahmadx.dev/posts/aws-ccp-cloud-monitoring/Sun, 25 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-cloud-monitoring/AWS Certified Cloud Practitioner notes on Cloud Monitoringhttps://ahmadx.dev/posts/aws-ccp-cloud-integrations/Sat, 24 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-cloud-integrations/AWS Certified Cloud Practitioner notes on Cloud Integrationshttps://ahmadx.dev/posts/aws-ccp-leveraging-the-aws-global-infrastructure/Fri, 23 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-leveraging-the-aws-global-infrastructure/AWS Certified Cloud Practitioner notes on Leveraging the AWS Global Infrastructurehttps://ahmadx.dev/posts/aws-ccp-deployments-managing-infrastructure-at-scale/Thu, 22 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-deployments-managing-infrastructure-at-scale/AWS Certified Cloud Practitioner notes on Deployments &amp; Managing Infrastructure at Scalehttps://ahmadx.dev/posts/aws-ccp-other-compute-services-ecs-lambda-batch-lightsail/Wed, 21 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-other-compute-services-ecs-lambda-batch-lightsail/AWS Certified Cloud Practitioner notes on Other Compute Services ECS, Lambda, Batch, Lightsailhttps://ahmadx.dev/posts/aws-ccp-databases-analytics/Tue, 20 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-databases-analytics/AWS Certified Cloud Practitioner notes on Databases &amp; Analyticshttps://ahmadx.dev/posts/aws-ccp-amazon-s3/Mon, 19 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-amazon-s3/AWS Certified Cloud Practitioner notes on Amazon S3https://ahmadx.dev/posts/aws-ccp-elb-asg-elastic-load-balancing-auto-scaling-groups/Sun, 18 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-elb-asg-elastic-load-balancing-auto-scaling-groups/AWS Certified Cloud Practitioner notes on ELB &amp; ASG - Elastic Load Balancing &amp; Auto Scaling Groupshttps://ahmadx.dev/posts/aws-ccp-ec2-instance-storage/Sat, 17 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-ec2-instance-storage/AWS Certified Cloud Practitioner notes on EC2 - Instance Storagehttps://ahmadx.dev/posts/aws-ccp-ec2-elastic-compute-cloud/Fri, 16 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-ec2-elastic-compute-cloud/AWS Certified Cloud Practitioner notes on EC2 - Elastic Compute Cloudhttps://ahmadx.dev/posts/aws-ccp-iam-identity-and-access-management/Thu, 15 Jan 2026 00:00:00 +0000https://ahmadx.dev/posts/aws-ccp-iam-identity-and-access-management/AWS Certified Cloud Practitioner notes on IAM (Identity and Access Management)