Backend Dev
Data Mapper vs Active Record in JavaScript ORMs (2026 Guide)
Learn when to choose Data Mapper or Active Record for your JavaScript ORM. Get code examples and key trade‑offs, plus a framework to keep…
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Backend Dev
51 articles
Backend Dev
BullMQ Monitoring & Debugging with Grafana (2026 Guide)
Learn to expose BullMQ metrics with a custom Prometheus exporter, build Grafana dashboards, set alerts, and use correlation IDs to quickly debug stalled jobs.
Backend Dev
JWT vs Session Cookies: Choose the Right Auth Method (2026)
Explore how JWT and session cookies differ for secure authentication, when to pick each, and practical steps to avoid stale tokens and ensure instant…
Backend Dev
Refresh Token Rotation & Reuse Detection Guide (2026)
Secure your OAuth2 app by rotating refresh tokens on use and detecting reuse attacks. Follow this guide to implement token families, hashing, and revocation.
Backend Dev
JWT Token Blacklisting with Redis: Best Practices (2026 Guide)
Use Redis blacklisting for instant JWT revocation. This Node.js guide gives quick, secure patterns to protect tokens, cut breach risk, and keep APIs safe.
AI
How to Run LLMs Locally and Reduce AI Model API Costs
Learn how to run LLMs locally using Ollama, Open WebUI, DeepSeek, Qwen, and VS Code to reduce Claude/OpenAI API costs.
Backend Dev
From PR to Production: How Kubernetes Deployments Actually Work (Single Service + Microservices in the Real World)
Most developers know how to write code. Fewer understand what actually happens after they click “Merge Pull Request.” And even fewer truly understand what…
Backend Dev
Why Your Node.js App Is Fast Locally but Slow in Production
A senior engineer’s deep dive into performance illusions, real bottlenecks, and hard-earned lessons If you’ve shipped a Node.js service to production, you’ve almost certainly…
Backend Dev
Idempotency Explained: How to Design Safe APIs That Don’t Break in Production
Idempotency is one of those topics that looks simple on paper and brutal in production. Most engineers understand the definition. Fewer understand the failure…
Backend Dev
Redis Is Not a Database (Until You Treat It Like One)
Redis has an identity problem—and most teams make it worse. On paper, Redis is simple: an in-memory data store with optional persistence.In practice, Redis…
Backend Dev
20+ Git Commands Every Software Engineer Should Know (And Actually Use in Production)
Most software engineers use Git every single day. And most of us use about five commands. That’s not a problem—until something goes wrong. A…
Backend Dev
Sprite Sheets in Node.js: How Video Platforms Show Fast Hover Previews Without Loading Hundreds of Images
Modern users don’t think in milliseconds — they think in feel. If a UI feels slow, it’s broken. And one of the most obvious…
Backend Dev
Stateless vs Stateful Services (With Real Examples)
If you’ve worked on backend systems long enough, you’ve probably heard this advice: “Make your services stateless.” It sounds simple. It sounds correct. And…
Backend Dev
Why Debugging Skills Matter More Than Writing New Code
Writing new code feels like progress.Debugging feels like damage control. But after enough time in production systems, you learn the uncomfortable truth: the engineers…
Backend Dev
Bloom Filter in Express.js (With Real Example and Dry Run Explained)
🧠 What is a Bloom Filter? A Bloom Filter is a probabilistic data structure used to test whether an element might be present in…
Backend Dev
Designing a Scalable URL Shortener: Snowflake IDs, Base62 Encoding, and Microservices
URL shorteners like Bit.ly or TinyURL are deceptively simple: take a long URL, generate a short one, and redirect. But when you want to…
Backend Dev
Designing a High-Concurrency Flash Sale Stock & Inventory Reservation System with Node.js, Redis, Lua, and MongoDB
Designing a High-Concurrency Flash Sale Stock & Inventory Reservation System with Node.js, Redis, Lua, and MongoDB
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30 Days kubernetes
Day 30:Kubernetes- Recap and Next Steps
Wrapping Up Your 30-Day Kubernetes Journey Congratulations on completing the 30-day Kubernetes learning plan! Over the past month, you have gained a comprehensive understanding…