Marcio Cunha

Technical Articles

Practical articles, in-depth tutorials, and architectural insights on software engineering, AI, and systems.

All categoriesArquiteturaAutomaçãoBackendCarreiraDevOpsEletrônicaEngenhariaFrontendHardwareIANegóciosProdutividadeRedes
BackendArquitetura•12 min

SQLite in Production: Guide to Litestream, Turso, and Local-First Architectures

Learn how to scale SQLite in production using WAL mode, Litestream replication to S3/R2, and distributed edge databases with Turso, removing traditional database complexity.

NegóciosCarreira•12 min

Working Remotely for Overseas Companies as a Dev: PJ Taxation, Fator R, Contracts, and FX

Definitive guide for Brazilian software engineers working remotely for foreign companies as a PJ. Master Simples Nacional, Fator R, tax exemptions, and FX.

IABackend•12 min

Structured Outputs with AI: Ensuring Strict Zod Schemas Without JSON Hallucinations

Learn how to move away from fragile JSON prompts in AI and implement strict Structured Outputs using Constrained Decoding and Zod in production.

DevOpsProdutividade•14 min

Practical Git Guide: Worktrees, Interactive Rebase, Bisect, and Cherry-Pick

Master advanced Git techniques with git worktrees for parallelism, bisect for binary regression hunting, interactive rebase for clean history, and precise cherry-pick strategies in high-performance enterprise environments.

BackendArquitetura•14 min

Cloudflare Workers and R2: How to Host Global Full-Stack Apps at Near-Zero Cost

Learn how to architect and build ultra-scalable full-stack applications at the edge using Cloudflare Workers and R2, eliminating egress fees and ensuring minimal global latency.

BackendArquitetura•14 min

Redis Beyond Cache: BullMQ Queues, Streams, and Distributed Rate Limiting Under High Concurrency

Discover how to scale Node.js applications using Redis beyond basic caching. Implement asynchronous queues with BullMQ, distributed rate limiting with Token Bucket, and lightweight messaging with Redis Streams.

IABackend•12 min

RAG: Hybrid Search (BM25 + Vectors) and Cross-Encoder Reranking

Learn how to overcome pure vector similarity limitations by implementing hybrid search with BM25, Reciprocal Rank Fusion, and Cross-Encoders to optimize enterprise RAG systems.

BackendArquitetura•15 min

Laravel 13: Architecture, Performance, and the Future of the PHP Ecosystem

Laravel 13 reinvents PHP backend architecture by combining high-performance runtimes, pre-compiled dependency injection, and native asynchronous concurrency. This version bridges the gap between rapid development and enterprise-grade scalability.

BackendArquitetura•12 min

Programming in PHP in 2026: Paradigms, Native Performance, and Enterprise Architecture

Modern PHP in 2026 has transformed into a high-performance powerhouse featuring strict typing, native concurrency, and robust enterprise architecture. Software teams can now build fast, resilient, and scalable distributed systems without abandoning the language's core web roots.

CarreiraArquitetura•14 min

Guide to Top Microsoft Certifications: From Engineering to Cloud Architecture

Microsoft Azure cloud certifications offer a structured path for senior engineers and architects to design resilient, secure, and cost-efficient distributed systems. Mastering these exams validates pragmatic technical competence rather than mere syntax memorization in hyperscale ecosystems.