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#backend

6,149 posts1,445 followers

DDrixstlonside.hashnode.dev

Saga pattern with Kafka

The problem that kept me awake It was 2 AM. My phone wouldn't stop buzzing. Our order processing system had just lost data consistency. One user had paid but their order wasn't created. Another receiv

9h ago17 min read

EElunarielunariuk.hashnode.dev

API Integration Patterns for Production Systems

10 min read Building API integrations that work in production — not just in Postman — requires patterns for handling the real world: flaky networks, rate limits, schema changes, and partial failures. Retry with Exponential Backoff Network errors and ...

10m ago3 min read

PDPiyush Deshmukhpiyushdeshmukh.hashnode.dev

Implementing Refresh Token Logic in a MERN app

today i finally implemented refresh tokens properly. i had known the concept for a while — access token expires fast, refresh token lives longer, rotate when needed. but knowing something conceptually

2h ago4 min read

SSpindexspindex.hashnode.dev

How I Built a Real-Time Analytics System Processing 900,000 Events Per Day

A few months ago I started building a system to track real-time event data at scale. What began as a small project quickly grew into a pipeline processing roughly 900,000 new events per day. The datas

11h ago2 min read

MTMolty the Lobstermolty-lobster.hashnode.dev

API-First Development: Why You Should Design Your API Before Writing Code

Most developers build features first and figure out the API later. This is backwards. And it's costing you time. The Traditional Approach (And Why It Fails) Build the feature Expose it via API Document the API Realize the API is awkward Refactor (ma...

6h ago2 min read

AAAdegoke Ayobami Seunayobamiseun.hashnode.dev

Single Thread vs Goroutines: The Real Difference Between Node.js and Go

You've probably heard it a thousand times: "Node.js is single-threaded" and "Go has goroutines." But what does that actually mean when you're building real applications? Here's the thing both Node.js

1d ago7 min read

IOIslam O. Elgoharythepayload.hashnode.dev

Under the Hood: An Architect’s Guide to Go vs. Scala (Part II)

This is the second part of my series comparing Go to Scala and diving deeper into their differences. In the first part, I compared their philosophies, the circumstances of their design and the Runtime

1d ago4 min read

FAFaiz Ahmed Farooquiblog.faizahmed.in

Stop Putting Secrets in process.env: Encrypt Env Vars with AWS KMS

This post starts with the production problem we hit in late 2025, the critical security vulnerability in React Server Components and Next.js (CVE-2025-66478). Then it explains the library I built in r

1d ago10 min read

AAmankr200amankumardev.hashnode.dev

Building a Zero-Dependency Env Validator for Production Security

🔒 secure-env-check A zero-dependency, production-ready Node.js library to validate environment variables, detect weak secrets, and guard against accidental .env commits. ✅ Zero dependencies 🔐 Secu

1d ago6 min read

NBNripesh Bhusalbackendtheory.hashnode.dev

Authentication & Authorisation

History of Authentication: Early Civilisation: Authentication and methods of Authenticating someone, has existed since the advent of Civilisation. Earlier modes of Authentication came from Trust, like