CI/CD & Delivery System Designs
Worked CI/CD & Delivery system design walkthroughs: the requirements, the trade-offs, real numbers and the component choices behind each design.
Autoscaling Self-Hosted CI Runner Fleet
Design a cost-efficient, elastic CI runner fleet that scales from zero to hundreds of workers in under 60 seconds, handles job queuing, and survives cloud spot interruptions.
CI/CD & Delivery · advanced · 12 min read
Build Caching and Monorepo CI: Affected-Target Detection and Remote Cache
How to cut CI wall-clock time from 45 min to under 4 min in a large monorepo by combining dependency-graph-based affected-target detection with a shared remote build cache.
CI/CD & Delivery · advanced · 12 min read
CI Pipeline: Runners, Build Matrix, Artifact Caching and Fan-out
Design a production-grade CI pipeline with distributed runners, parallel build matrices, artifact caching, and fan-out job orchestration. Covers architecture, data models, scaling, and failure modes.
CI/CD & Delivery · intermediate · 12 min read
Container Image and Artifact Registry
Design a production-grade registry that stores, versions, and distributes container images and build artifacts at scale, covering storage layout, auth, garbage collection, and global replication.
CI/CD & Delivery · intermediate · 12 min read
Deployment Strategies: Rolling, Blue-Green, Canary, and Shadow Traffic
A deep-dive into four production deployment patterns—when to use each, how to implement them, and the real trade-offs between speed, safety, and infrastructure cost.
CI/CD & Delivery · intermediate · 12 min read
Feature Flag and Progressive Delivery Service
Design a scalable feature flag platform that supports targeting rules, gradual rollouts, A/B experiments, and kill switches with sub-10ms SDK evaluation latency.
CI/CD & Delivery · intermediate · 12 min read
GitOps: Declarative Continuous Delivery with Argo CD and Flux
Design a production-grade GitOps pipeline using Argo CD or Flux to drive declarative, auditable, self-healing Kubernetes deployments from a Git source of truth.
CI/CD & Delivery · intermediate · 12 min read
Release Orchestration Across Many Services: Trains, Gates and Rollback
How to coordinate deployments of dozens of microservices using release trains, automated quality gates, and fast rollback mechanisms without causing cascading failures.
CI/CD & Delivery · advanced · 12 min read
Zero-Downtime Database Schema Migrations: Expand-Contract and Dual Writes
Apply the expand-contract pattern and dual-write strategy to evolve PostgreSQL schemas without downtime, covering every phase from column addition to old-code removal.
CI/CD & Delivery · advanced · 12 min read