I am a Software Engineer and Consultant with 15 years of experience specialized in building deterministic automation, data pipelines, and reliable systems under real-world constraints.

As the founder of 99codes, I partner with agencies and enterprises to conduct deep technical audits, optimize core operations, and build high-scale integrations that turn messy workflows into robust software architecture.

My work spans the backend, frontend, and platform layers, with a strict emphasis on:

• System Correctness & Data Integrity: Designing bulletproof ETL pipelines and batch workflows that eliminate manual data entry.
• Performance & Predictable Behavior: Evolving legacy infrastructures and scaling applications without breaking production.
• Web Standards, Privacy, & Security: Auditing digital tracking compliance, scrapers, bot management, and resource optimization.

I build production-ready reference implementations, custom crawlers, and analysis pipelines designed to solve concrete operational problems:

• Privacy Signals & Request Inspection: Authored an advanced browser extension to analyze third-party tracking behavior, resource consumption, and client-side digital privacy patterns.
• LinkedIn Chrome Extension Probing Analysis: Documented and reconstructed a dataset analyzing client-side routines that probe over 4,200+ browser extensions, developing custom scrapers and report generators to evaluate passive fingerprinting risks.
• Bot Compliance & Robots.txt Parsing: Developed a high-performance open-source PHP library for parsing and debugging robots.txt files, optimizing bot management and search compliance.
• Typography & Performance Pipelines: Engineered self-hosting pipelines and metadata extraction tooling to enforce web standards and predict typography fallbacks in production environments.

When production constraints expose gaps in modern frameworks or documentation, I contribute directly back to the core tools the industry relies on:

• Google Chrome / Lighthouse: Contributed performance and architecture fixes identified through real-world technical auditing workflows.
• Google / robotstxt (C++): Authored documentation and behavior corrections to align core CLI outputs with actual parser behavior.
• Tighten / Jigsaw: Authored the core upstream implementation allowing dynamic collection definitions via functions in the static-site generator.
• Spatie / laravel-csp: Contributed fixes and behavioral improvements to Content Security Policy enforcement in the Laravel ecosystem.
• PHP.net: Fixed accessibility, layout responsiveness, and rendering issues across the official global documentation site.

Every system I build incorporates a practical, battle-tested approach to:

• Concurrency control and safe async processing.
• Data caching, parsing accuracy, and strict idempotency.
• Predictable failure handling in massive, multi-merchant environments.

I am most effective where requirements are fluid, constraints are real, and systems must stay 100% online while they evolve.

Positioned for select consulting engagements, data intelligence architecture, and technical audits via 99codes.

Let's talk engineering efficiency:

• LinkedIn: https://www.linkedin.com/in/leopoletto/
• Email: hello@leopoletto.dev