Pedro Fernandes

Full-Stack Engineer
Building systems that connect code, machines and cryptography with precision and design.

hitice@github:~$ whoami

role:        Full-stack engineer
ships:       Multi-tenant SaaS, payments, ERP integrations
designs:     ADRs, row-level security, idempotent webhooks
also:        CNC machines, RPA, GPU cryptography research

hitice@github:~$ stack --core

• C# and .NET for APIs, workers and real-time with SignalR
• TypeScript and React for dashboards and installable mobile apps
• Java for libraries, command line tools and JavaFX desktop apps, published with Maven
• PHP and Laravel for the platform that runs Avalia in production
• PostgreSQL with tenant isolation, advisory locks and additive migrations
• Python for automation, RPA and research
• Bitcoin script, Taproot and secp256k1, from vault design to GPU key search in CUDA and Go

hitice@github:~$ git log --stat --since=forever | languages

hitice@github:~$ stack --also

hitice@github:~$ ls ~/projects --featured

• Avalia Sales · Reseller network for QR Code and NFC plates: white label, payment split, commissions, renewals and contracts. Tenant isolation by row-level security, 30+ ADRs, 600+ tests.
  _{C# · .NET · React · PostgreSQL · Docker}
• Lanhouse Digital · Storefront of digital services for walk-in customers: PIX payments, AI contract and resume review, ABNT formatting and local PDF generation.
  _{Next.js · TypeScript · Supabase · Asaas · Anthropic}
• Kids Wallet · Open concept for a Bitcoin vault that only the child can open, at 18, with an AI tutor that grows with them. Working timelock vault, eight public RFCs and a live demo.
  _{TypeScript · React · bitcoinjs-lib · Taproot}
• pix-brcode-java · Generate, parse and validate PIX QR codes, with a command line tool that draws the QR in the terminal. Zero-dependency core, every key type including the 2026 alphanumeric CNPJ, official manual examples reproduced byte for byte.
  _{Java 21 · Maven · ZXing}
• cnc-gcode-simulator · Check a CNC program before it reaches the machine: RS274NGC interpreter, cycle time with an acceleration model, soft-limit and safety warnings with the line number, and a 3D viewer that plays the toolpath.
  _{Java 21 · JavaFX · picocli}

- **[secp256k1 GPU search](https://github.com/Hitice/Matrix-Search)** · GPU engine for secp256k1 key search with checkpointing, a controller and a live telemetry dashboard.
_{CUDA · C++ · Go} - **[Bitcoin Puzzle analysis](https://github.com/Hitice/BTC-Puzzle-laces)** · Research on the 2015 Bitcoin Puzzle: key generation hypotheses and power audits of the detectors.
_Python - **[GreenClean](https://github.com/Hitice/greenclean)** · Chrome extension that cleans Gmail with rules and optional AI, keeping message content on the device.
_{JavaScript · Chrome Extensions · Gmail API}

hitice@github:~$ git log --graph

hitice@github:~$ echo $MOTTO
> The best code is the one that teaches you something new every time you read it.