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