---
title: "reliability"
lang: "en"
author: "Mohammad Abu Mattar"
canonical: https://mkabumattar.com/case-studies/categories/reliability
---

[Home](/)›[All Case Studies](/case-studies)›[All Categories](/case-studies/categories)›[Reliability](/case-studies/categories/reliability)

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3Case Studies

# Reliability

CategoryAllDevOps (9)Cloud Computing (5)Architecture (4)Cloud Native (4)Reliability (3)Security (2)Cloud (1)Cloud Architecture (1)Databases (1)Management (1)Performance (1)Platform Engineering (1)TagAllKubernetes (5)AWS (3)EKS (3)Observability (3)Argo CD (2)GitOps (2)Idempotency (2)SLSA (2)Supply Chain Security (2)Active Active (1)Alerting (1)Argo Rollouts (1)ArtifactHub (1)Backstage (1)Cache Invalidation (1)Caching (1)Canary (1)CDN (1)CI/CD (1)Containers (1)Cosign (1)Cost Optimization (1)Cutover (1)Database Migration (1)Error Budget (1)Event Driven (1)EventBridge (1)Failover (1)FinOps (1)Golden Paths (1)Helm (1)High Availability (1)Internal Developer Platform (1)Istio (1)Latency (1)Logical Replication (1)Microservices (1)Migration (1)MTLS (1)Multi Region (1)On Call (1)P99 (1)Payments (1)Performance (1)PostgreSQL (1)Prometheus (1)Provenance (1)RDS (1)Redis (1)Rollback (1)RPO (1)RTO (1)Savings Plans (1)Self Service (1)Service Mesh (1)Sigstore (1)SLO (1)SQS (1)SRE (1)Step Functions (1)Strangler Pattern (1)Terraform (1)Traffic Shifting (1)Trivy (1)Wolfi (1)Zero Downtime (1)SortNewest firstOldest firstA to ZShortest read first

[![Replacing Cron Chaos with an Event-Driven Pipeline](/_astro/hero.Dm63yRWp_Z1lGdiN.webp)](/case-studies/post/cron-to-event-driven-pipeline)

## [Replacing Cron Chaos with an Event-Driven Pipeline](/case-studies/post/cron-to-event-driven-pipeline)

-   [Cloud Architecture](/case-studies/categories/cloud-architecture)
-   [DevOps](/case-studies/categories/devops)
-   06 Oct 2026
-   10 Mins read

The handover note said "check the pipeline runs" and nothing else. Behind that sentence were 41 cron jobs spread across 6 EC2 hosts, some chained by sleep 900 because someone had once needed job B t

[#Event Driven](/case-studies/tags/event-driven)[#AWS](/case-studies/tags/aws)[#EventBridge](/case-studies/tags/eventbridge)+4 tags

[Read Case Study](/case-studies/post/cron-to-event-driven-pipeline)

[![Taming a 3am Pager: SLOs and Error Budgets That Stuck](/_astro/hero.an3xFV8m_q9tWb.webp)](/case-studies/post/slo-error-budget-rollout-case-study)

## [Taming a 3am Pager: SLOs and Error Budgets That Stuck](/case-studies/post/slo-error-budget-rollout-case-study)

-   [Reliability](/case-studies/categories/reliability)
-   [DevOps](/case-studies/categories/devops)
-   29 Aug 2026
-   07 Mins read

A platform team was losing people to burnout, and the cause was the pager. On-call meant a phone that went off day and night with alerts about CPU, memory, and pod restarts, the overwhelming majority

[#SLO](/case-studies/tags/slo)[#Error Budget](/case-studies/tags/error-budget)[#SRE](/case-studies/tags/sre)+4 tags

[Read Case Study](/case-studies/post/slo-error-budget-rollout-case-study)

[![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)