---
title: "cloud-computing"
lang: "en"
author: "Mohammad Abu Mattar"
canonical: https://mkabumattar.com/categories/cloud-computing
---

[All Categories](/case-studies/categories)

# Cloud computing

[Home](/)›[All Case Studies](/case-studies)›[All Categories](/case-studies/categories)›[Cloud computing](/case-studies/categories/cloud-computing)

Category

# Cloud computing

CategoryAllDevOps (5)Cloud Native (4)Cloud Computing (3)Architecture (2)Databases (1)Platform Engineering (1)Reliability (1)Security (1)TagAllKubernetes (3)Argo CD (2)EKS (2)GitOps (2)Active Active (1)Argo Rollouts (1)ArtifactHub (1)AWS (1)Backstage (1)Containers (1)Cosign (1)Cost Optimization (1)Cutover (1)Database Migration (1)Failover (1)FinOps (1)Golden Paths (1)Helm (1)High Availability (1)Idempotency (1)Internal Developer Platform (1)Logical Replication (1)Microservices (1)Migration (1)Multi Region (1)Payments (1)PostgreSQL (1)RDS (1)Rollback (1)RPO (1)RTO (1)Savings Plans (1)Self Service (1)SLSA (1)Strangler Pattern (1)Supply Chain Security (1)Terraform (1)Traffic Shifting (1)Trivy (1)Wolfi (1)Zero Downtime (1)SortNewest firstOldest firstA to ZShortest read first

[![Multi-Region Active-Active for a Payments API](/_astro/hero.RPbRRCdE_flG0g.webp)](/case-studies/post/multi-region-active-active-payments)

## [Multi-Region Active-Active for a Payments API](/case-studies/post/multi-region-active-active-payments)

-   [Architecture](/case-studies/categories/architecture)
-   [Cloud Computing](/case-studies/categories/cloud-computing)
-   16 Aug 2026
-   06 Mins read

A payments API that moves real money had been running comfortably in a single AWS region for years. It was reliable until the day it was not: a regional control-plane incident took the whole service o

[#Multi Region](/case-studies/tags/multi-region)[#Active Active](/case-studies/tags/active-active)[#Payments](/case-studies/tags/payments)+5 tags

[Read Case Study](/case-studies/post/multi-region-active-active-payments)

[![Zero-Downtime PostgreSQL Major-Version Upgrade at Scale](/_astro/hero.C03RcOLI_141vsK.webp)](/case-studies/post/zero-downtime-postgres-upgrade)

## [Zero-Downtime PostgreSQL Major-Version Upgrade at Scale](/case-studies/post/zero-downtime-postgres-upgrade)

-   [DevOps](/case-studies/categories/devops)
-   [Databases](/case-studies/categories/databases)
-   25 Jul 2026
-   08 Mins read

A multi-terabyte PostgreSQL 12 database was reaching end of life, and the business ran around the clock, so the usual answer of "schedule a maintenance window" was off the table. We upgraded it to Pos

[#PostgreSQL](/case-studies/tags/postgresql)[#Logical Replication](/case-studies/tags/logical-replication)[#Zero Downtime](/case-studies/tags/zero-downtime)+3 tags

[Read Case Study](/case-studies/post/zero-downtime-postgres-upgrade)

[![Cutting a SaaS AWS Bill 41% Without Slowing Delivery](/_astro/hero.DJTB593d_Z1iASgs.webp)](/case-studies/post/aws-cost-optimization-saas-case-study)

## [Cutting a SaaS AWS Bill 41% Without Slowing Delivery](/case-studies/post/aws-cost-optimization-saas-case-study)

-   [Cloud Computing](/case-studies/categories/cloud-computing)
-   [DevOps](/case-studies/categories/devops)
-   19 Jul 2026
-   10 Mins read

A growing SaaS ran on EKS with a full GitOps pipeline, and it was over its AWS budget nearly every month. The reflex from leadership was the usual one: freeze features until the bill comes down. That

[#AWS](/case-studies/tags/aws)[#EKS](/case-studies/tags/eks)[#Kubernetes](/case-studies/tags/kubernetes)+7 tags

[Read Case Study](/case-studies/post/aws-cost-optimization-saas-case-study)