Development Archives - Page 2 of 32 - ITFROMZERO

Processing Parquet Files in Python with PyArrow: Reading, Writing, and Production Optimization Tips

By IT From Zero October 27, 2026

Six months of production experience using PyArrow and Apache Parquet in Python: resolving VPS OOM errors, slashing log storage from 12GB to 1.4GB, and cutting processing time from 18 minutes to 42 seconds.

Development

A Guide to Testcontainers with TypeScript: Production-Grade Dockerized Integration Tests for PostgreSQL and Redis

By IT From Zero October 27, 2026

Integration tests touching databases and caches are notoriously prone to dirty state and port collisions. Testcontainers paired with TypeScript lets you automatically spin up, isolate, and tear down real PostgreSQL and Redis containers directly from your test code.

Development

Building an Event-Driven Microservices System with Apache Kafka and NestJS: From Producer and Consumer to Dead Letter Queue (DLQ)

By IT From Zero October 26, 2026

Master Event-Driven Microservices with Apache Kafka and NestJS. A step-by-step guide to setting up Producers, Consumers, and production-grade Dead Letter Queue (DLQ) strategies.

Python

A Guide to DiskCache in Python: Safe Multi-Process Disk Caching Without Redis

By IT From Zero October 26, 2026

Boost Python performance on low-RAM servers with DiskCache: safe, high-speed multi-process disk caching without installing or managing Redis.

Python

Integrating OpenTelemetry into Python: Practical Microservices Monitoring Strategies

By IT From Zero October 26, 2026

Real-world lessons from 6 months of running OpenTelemetry in production Python microservices: auto-instrumentation, log correlation, and cutting debug time from 45 to under 2 minutes.

Development

Implementing Single Sign-On (SSO) with Keycloak and Next.js: A Complete OpenID Connect (OIDC) Guide

By IT From Zero October 24, 2026

Practical guide to implementing Single Sign-On (SSO) with Keycloak and Next.js. Covers Docker setup, OIDC configuration, middleware-based RBAC, and silent token refresh.

Python

APScheduler in Python: Production-Ready Background Job Scheduling for Backend

By IT From Zero October 24, 2026

Move beyond crude time.sleep loops to a resilient scheduling architecture with APScheduler in Python. Learn how to configure SQLAlchemy JobStore, handle misfires, and integrate cleanly into FastAPI.

Development

How to Back Up SQLite to S3 with Litestream: Real-Time Production Backups

By IT From Zero October 23, 2026

Litestream's Continuous WAL Replication makes SQLite production-ready with real-time backups to S3 and second-accurate Point-in-Time Recovery.

Development

Building Your Own MCP Server with TypeScript: Connect AI Assistants to Internal Systems

By IT From Zero October 22, 2026

A practical guide to building an MCP Server with TypeScript from scratch: connect AI assistants to internal data using Anthropic's open standard.

Development

Mastering TanStack Query v5 in React: Practical Server State Management, Caching, and Optimistic Updates

By IT From Zero October 22, 2026

Real-world experience with TanStack Query v5 in React: ditch useEffect boilerplate, distinguish server state, master staleTime, and achieve smooth UX with optimistic updates.