#Architecture
— 32 posts
Flowchart Diagrams: A Practical Guide to Every Symbol and When to Use It
A structural, symbol-by-symbol guide to flowcharts — ANSI/ISO 5807 shapes with real meanings, when each one applies, how to lay out process, swim-lane, and data-flow diagrams, and ready-to-copy Mermaid examples.
Security Attacks Every Engineer Should Know: A Field Guide to the Techniques Attackers Actually Use
A structural, named-technique-by-named-technique walkthrough of the attacks a modern web application has to defend against — injection, authentication flaws, XSS, CSRF, IDOR, SSRF, deserialization, race conditions, supply-chain attacks, and more — with how each works and what to do about it.
SOLID Principles Explained for Working Developers
Five principles that separate code you can still touch in six months from code that becomes a minefield. Each principle explained in plain English with before/after code in TypeScript, Java, Python, and C#.
Testing Strategy for Production Systems
Unit, integration, contract, and e2e — when each actually pays off, the modern test pyramid, and a practical policy for flaky tests. Concrete advice for a service that ships.
Zero-Downtime Database Migrations: The Expand/Contract Playbook
How to change a production schema without taking traffic down — expand/contract, backfills, dual-writes, online DDL, and the migrations that always bite you.
Feature Flags and Progressive Delivery in Production
From kill switches to percentage rollouts — how to decouple deploy from release, evaluate self-hosted vs SaaS flag platforms, and keep flag debt from eating your codebase.
Caching Strategies Beyond 'Just Add Redis'
Cache-aside, write-through, write-behind, read-replicas, edge caches, HTTP ETags, and stale-while-revalidate — how to pick the right caching pattern and how to invalidate without tears.
Building a Production RAG System: Beyond the Demo
Chunking, embeddings, hybrid retrieval, reranking, citation, and evaluation — a practical guide to building a RAG pipeline that survives real traffic and messy documents.
Monorepo Strategy in 2026: pnpm, Turborepo, Nx, and Friends
When a monorepo pays off, which toolchain to pick, and what a sensible layout looks like for a small-to-mid team — pnpm workspaces, Turborepo, Nx, and the newer options.
CQRS and Event Sourcing: The Real Trade-offs
When CQRS pays off, when Event Sourcing makes it worse, and when plain CRUD is the right call. With TypeScript examples and the anti-patterns to avoid.
The Strangler Fig Pattern: Migrating a Legacy Monolith Without the Big-Bang Rewrite
A realistic playbook for replacing a legacy system in place — routing, dual-write, shared data, team slicing, and the order of operations that actually ships.
Designing RESTful API Endpoints: Best Practices for HTTP Methods and URL Structure
A comprehensive guide to RESTful API endpoint design — covering HTTP methods (GET, POST, PUT, PATCH, DELETE), URL structure, status codes, pagination patterns, error handling with RFC 7807, and real-world implementations in TypeScript, Java, Python, and C#.
Database Diagrams: A Practical Guide to Schema Design and Documentation
A comprehensive guide to database diagrams — covering ERD notations (Chen, Crow's Foot, UML), drawing with Mermaid and PlantUML, real-world schema examples, and best practices for documenting database designs.
JWT for Service-to-Service Authentication : Server-to-Server Authentication in Microservices
A comprehensive implementation guide to JWT for service-to-service authentication — covering signed JWTs between services, asymmetric keys (RS256/ES256) for distributed verification, token propagation patterns, and Node.js implementation.
Service Mesh Identity (SPIFFE/SPIRE) : Server-to-Server Authentication in Microservices
A comprehensive guide to SPIFFE/SPIRE for workload identity in microservices — covering SPIFFE ID format, SVIDs, SPIRE architecture and components, Istio/Envoy integration, and zero-trust networking patterns.
OAuth 2.0 Client Credentials Grant : Server-to-Server Authentication in Microservices
A comprehensive implementation guide to OAuth 2.0 Client Credentials Grant for machine-to-machine authentication — covering the client credentials flow, token caching and refresh, scope and audience validation, and Node.js implementation with multiple identity providers.
API Keys & HMAC Signatures : Server-to-Server Authentication in Microservices
A comprehensive implementation guide to API key and HMAC signature authentication — covering API key generation and storage, HMAC request signing inspired by AWS Signature V4, Node.js implementation, rate limiting, and key rotation strategies.
Mutual TLS (mTLS) Authentication : Server-to-Server Authentication in Microservices
A comprehensive implementation guide to Mutual TLS (mTLS) for service-to-service authentication — covering certificate chains, CA setup, certificate rotation, Node.js and Go implementations, Kubernetes cert-manager integration, and production patterns.
Server-to-Server Authentication in Microservices
A high-level comparison of five authentication patterns for service-to-service communication — mTLS, API Keys & HMAC, OAuth 2.0 Client Credentials, Service Mesh Identity (SPIFFE/SPIRE), and JWT — covering when to use each, trade-offs, and real-world examples.
WebSocket and SSE Communication : Server-to-Server Communication Technologies
A comprehensive guide to WebSocket and Server-Sent Events for real-time communication — covering the WebSocket protocol, SSE, scaling persistent connections, heartbeats, reconnection, and production patterns.
GraphQL Federation : Server-to-Server Communication Technologies
A comprehensive guide to GraphQL Federation for server-to-server communication — covering schema composition, subgraph design, entity resolution, the gateway router, performance optimization, and production deployment.
Event Streaming with Kafka : Server-to-Server Communication Technologies
A comprehensive guide to event streaming with Apache Kafka — covering topics, partitions, consumer groups, exactly-once semantics, Schema Registry, Kafka Streams, and production deployment patterns.
Message Queue Communication : Server-to-Server Communication Technologies
A comprehensive guide to message queues for server-to-server communication — covering RabbitMQ, Amazon SQS, delivery guarantees, dead-letter queues, backpressure, and production patterns.
gRPC Communication : Server-to-Server Communication Technologies
A comprehensive guide to gRPC for server-to-server communication — covering Protocol Buffers, service definitions, streaming patterns, interceptors, error handling, load balancing, and production deployment.
REST API Communication : Server-to-Server Communication Technologies
A comprehensive guide to REST API for server-to-server communication — covering API design principles, HTTP semantics, authentication patterns, error handling, rate limiting, circuit breakers, and production best practices.
Server-to-Server Communication Technologies
A high-level comparison of server-to-server communication patterns — REST, gRPC, Message Queues, Event Streaming, GraphQL Federation, and WebSocket/SSE — covering when to use each, trade-offs, and real-world use cases.
Authentication Strategies for Modern Web Applications
A high-level comparison of modern authentication approaches — Session-based, JWT, OAuth 2.0, Passwordless, and MFA — covering when to use each, trade-offs, and real-world use cases.
System Design Patterns Every Senior Engineer Should Know
Essential system design patterns for senior engineers, covering load balancing, caching strategies, database sharding, message queues, rate limiting, circuit breaker, CQRS, and event sourcing with practical architectural examples.
TypeScript Patterns for Large Codebases
TypeScript at scale requires different patterns than TypeScript for a side project. Here are the type patterns and architectural decisions that keep large codebases maintainable, based on managing 200K+ line TypeScript projects.
Integrating AI into Production Applications: A Practical Guide
A comprehensive guide to integrating LLMs and AI models into production applications, covering architecture patterns, cost optimization, fallback strategies, prompt engineering, RAG systems, monitoring, and critical considerations.
Building Scalable B2B Platforms with Microservices
After shipping three B2B SaaS platforms from scratch, I've learned that microservices aren't a silver bullet — but applied correctly, they let small teams move fast without stepping on each other. Here's the architecture playbook I return to again and again.
State Management in React: What Actually Works in 2025
The React state management landscape has matured significantly. After evaluating every major solution across multiple production apps, here's a pragmatic guide to choosing the right tool — and why you probably need less than you think.