Blog — Page 10 of 53
Browsing page 10 of 53 — 634 articles and counting.
How the Node.js Event Loop Actually Works: Phases, Microtasks, and Production Implications
A deep dive into the six phases of the Node.js event loop, the microtask queue, how I/O interacts with the poll phase, and what all of this means for production TypeScript applications.
The Strangler Fig Pattern: Incrementally Replacing Legacy Systems Without Stopping Feature Development
A practical guide to migrating legacy systems using the strangler fig pattern: routing proxies, anti-corruption layers, dual-write data strategies, CDC with Debezium, and a TypeScript implementation of an incremental traffic-shifting proxy.
Vector Clocks and Causal Ordering: How Distributed Systems Track What Happened Before What
A production-oriented explanation of why physical clocks fail in distributed systems, how Lamport timestamps and vector clocks solve causal ordering, and how version vectors and dotted version vectors handle conflict detection in replicated stores.
Frontend Observability in Production: Real User Monitoring, Error Tracking, and Performance Instrumentation with OpenTelemetry
Most teams have solid backend observability but no visibility into what users actually experience in the browser. This guide covers Real User Monitoring with Core Web Vitals, client-side error tracking with source map resolution, distributed tracing via OpenTelemetry JS SDK, and a build-vs-buy comparison for frontend observability tooling.
Designing a Distributed Counter: Sharded Writes, Approximate Reads, and Consistency Trade-offs at Scale
A deep technical walkthrough of distributed counter system design: why single atomic counters collapse under load, sharded write paths with rollup aggregation, CRDT-based G-Counters and PN-Counters, probabilistic structures like Count-Min Sketch and HyperLogLog, read-your-writes consistency, hot-key mitigation, and a tradeoffs table across accuracy, throughput, latency, and storage cost dimensions.
Designing a Presence System: Heartbeat Protocols, Distributed Session Tracking, and Scalable Online Status for Collaborative Applications
A deep technical walkthrough of production presence system design: heartbeat protocol tuning, Redis-backed distributed session tracking, pub/sub fanout across server instances, multi-device merging, last-seen computation, privacy controls, client-side batching to avoid render storms, and sharding to millions of concurrent users.
Designing an Error Tracking System: Exception Grouping, Stack Trace Fingerprinting, and Intelligent Alerting at Scale
How production error tracking systems work under the hood: event ingestion pipelines, stack trace parsing with source map resolution, fingerprinting algorithms that group thousands of identical exceptions, release-aware regression detection, and intelligent alerting with spike detection.
Designing a Durable Execution Engine: Workflow Replay, Checkpointing, and Failure Recovery for Long-Running Distributed Processes
A deep dive into the replay-based execution model used by durable execution frameworks. Covers event sourcing of workflow steps, deterministic constraints, checkpointing strategies, saga compensation, and exactly-once side effects with TypeScript examples.
Designing a Recommendation Engine: Collaborative Filtering, Content-Based Ranking, and Real-Time Personalization at Scale
A production architecture guide covering collaborative filtering, content-based ranking, hybrid pipelines, embedding-based ANN search, cold-start strategies, and low-latency serving for recommendation systems at scale.
Building AI-Powered User Interfaces in React: Streaming Responses, Tool Call Rendering, and Progressive Enhancement with the Vercel AI SDK
A production-focused guide to building AI chat and copilot interfaces in React. Covers streaming token rendering with useChat and useCompletion, real-time tool call rendering, message persistence, progressive enhancement when AI is unavailable, and performance patterns for high-frequency re-renders.
Designing a Real-Time Chat System: Message Ordering, Delivery Guarantees, and Presence Management at Scale
A deep dive into the engineering decisions behind real-time chat systems, covering message ordering with hybrid logical clocks, at-least-once delivery with client-side deduplication, presence detection, group chat fan-out, and WebSocket routing across distributed server instances.
Designing a Social Graph: Storage Models, Traversal Queries, and Mutual Connection Discovery at Scale
A deep dive into social graph system design covering adjacency list storage in relational vs graph databases, bidirectional vs unidirectional edges, efficient mutual-friend and friend-of-friend queries, hot-path caching for recommendations, and fan-out implications for feeds and notifications.