Every guide
in one place

The full Refactix archive. Hands-on writing on AI-driven development, cloud infrastructure, and modern software architecture.

AI Development

2025-08-15

Building Agentic AI Systems with LangChain

How to build autonomous AI agents with LangChain: agent architecture, tool integration, memory, and what holds up when you actually deploy them.

AWS Cost Anomaly Detection: Catching Bill Spikes Before They Hit

Catch unexpected AWS spend before it hits the bill with AWS Cost Anomaly Detection. How to set up monitors, alerts, and tagging that make the reports actually useful.

SaaS Churn Reduction with Activation Data and Lifecycle Campaigns

Cut SaaS churn with product analytics, activation milestones, and automated lifecycle campaigns. A working framework and the implementation notes that go with it.

Real-time E-commerce Fraud Detection: Rules, ML, and Webhooks

How to wire deterministic rules and an ML scorer together via webhooks to cut chargebacks. Architecture, the five rules that catch most fraud, and the deployment gotchas.

E-commerce Backends Under Black Friday Load: What Actually Holds Up

How to prepare an e-commerce backend for Black Friday: caching layers, queue-based order processing, inventory locking, and the failure modes you only see at 10x traffic.

n8n Pagination and Rate Limits: Syncs That Don't Lose Records

Cursor and page pagination in n8n, retries with backoff, batching, and the patterns that keep large data syncs from quietly dropping rows.

Hardening n8n Webhooks: Patterns for Production Traffic

Idempotency, retries, rate limiting, and signature checks for n8n webhooks. Working code for the failure modes you hit at real traffic.

Zero Downtime Deployments: A Pipeline That Actually Holds Up

Blue-green deployments, rolling updates, and automated rollback. A working deployment pipeline that lets you ship to production without a maintenance window.

Constructive code reviews: feedback that helps people get better

How to run code reviews that improve code without damaging the team. Practical guidelines, templates, and the habits that separate gatekeeping from collaboration.

11 minutes

Intermediate

Every guidein one place

Building Agentic AI Systems with LangChain

AWS Cost Anomaly Detection: Catching Bill Spikes Before They Hit

SaaS Churn Reduction with Activation Data and Lifecycle Campaigns

Real-time E-commerce Fraud Detection: Rules, ML, and Webhooks

E-commerce Backends Under Black Friday Load: What Actually Holds Up

n8n Pagination and Rate Limits: Syncs That Don't Lose Records

Hardening n8n Webhooks: Patterns for Production Traffic

Zero Downtime Deployments: A Pipeline That Actually Holds Up

Constructive code reviews: feedback that helps people get better

Every guide
in one place