Senior Rust Engineer · AI Systems Architect · Blockchain Infrastructure Engineer
São Paulo, Brazil · Remote-first since 2016 · 🌍 ~70 countries visited
Senior Rust engineer with 3+ years of production Rust at 300K-user scale, built on 22+ years of systems engineering. Since 2017, exclusively focused on Blockchain infrastructure and Artificial Intelligence — a rare combination of deep protocol-level engineering, production AI platform architecture, and enterprise-grade payment systems.
Languages: 🇬🇧 English (Full Professional) · 🇧🇷 Portuguese (Native) · 🇪🇸 Spanish (Full Professional) · 🇫🇷 French (Limited)
Blockchain & Protocol Engineering
Languages & Runtimes
Rust
Node.js
Go
C#
Python
Platform & Infrastructure
Linux
MacOS
Docker
Databases
MySQL
PostgreSQL
MongoDB
Redis
SQLite
MS SQL Server
🔧 Co-Founder & Technical Lead — Aizzy.ai (2023–2025)
São Paulo, Brazil (Remote) — Privacy-first AI workspace grown to 300K+ users with Stripe + PIX subscription billing and real-time WebSocket streaming.
- Designed the full AI architecture from scratch: browser-native RAG pipeline (ONNX WASM + IndexedDB/Dexie + Web Workers), 3-tier memory system (recent → summarized → semantic via ONNX embeddings), 5-category intent classification, and custom multi-agent system in Rust (tokio::spawn + join_all + cost aggregation).
- Built a multi-modal AI runtime (ai.worker.ts) running Whisper-tiny (audio), ViT-GPT2 (vision), Xenova embeddings (text), and tesseract.js (OCR) — all compiled to WASM, all in dedicated Web Workers with zero-copy ArrayBuffer messaging.
- Integrated 6 embedding providers (OpenAI Ada-002, Jina, Gemini, Cohere, Voyage AI, Xenova ONNX) and 4 vector stores (pgvector, Pinecone, Supabase Vector, IndexedDB).
- Built a Skills system with YAML frontmatter-driven LLM tool injection and AGENTS.md discovery service for context-aware system prompts.
- Evolved architecture from server-side LangChain/Python + pgvector/Pinecone → browser-first inference with zero server AI cost — a pioneering approach that eliminated server-side embedding and inference expenses entirely.
Tech stack: Rust (Axum, SQLx, Moka, tokio), Go (Fiber, pgxpool), TypeScript/React (Vite, Zustand, Dexie, TanStack Query), PostgreSQL + pgvector, MongoDB, Redis, Docker Swarm, Cloudflare Pages/Tunnel, Datadog, Dynatrace.
🔐 Core Developer — Vultisig (2024–2026)
Remote (Global) — Core contributor to an open-source, non-custodial MPC wallet with ECDSA + EdDSA Threshold Signatures across iOS, desktop, browser extension, and server.
- vultisig-ios: Swift, 7,510 commits, 135 releases — production MPC wallet for 10+ chains.
- vultisig-windows: TypeScript/Go/Wails, 6,423 commits, 65 releases — desktop app + Chrome extension (public-key-only security).
- vultiserver: Go, Docker, Redis — TSS Keygen/Keysign/Reshare/Migrate (GG20→DKLS). Production at api.vultisig.com.
- commondata: Protobuf schemas (buf-managed), Swift + Go codegen for all Vultisig projects.
- Wallet Core (Trust Wallet): Contributed Rust components alongside C++ core — blockchain integrations, transaction signing, address derivation, THORChain upstream support.
- Worked at the implementation level of MPC cryptography, directly interfacing with TSS protocol internals.
🪙 CTO — SmartCash (2017–2021)
Remote (Global) — CTO of a layer-1 blockchain ecosystem (65 repositories, 4 years): Core protocol, decentralized wallet layer, block explorers, mobile/desktop wallets, SDKs, payment plugins, governance, community infrastructure.
- Contributed to Core-Smart (C++, Bitcoin Core fork) — consensus-level protocol engineering, Keccak mining variant implementation.
- Architected the SAPI decentralized wallet layer — wallet infrastructure running on SmartNodes without full chain sync (light-client architecture).
- Contributed to blockbook (Go, Trezor fork, 738 ⭐) — address/balance indexer.
- Shipped 4 wallet clients, 6 language SDKs, payment plugins, governance systems, and remittance corridors across Brazil/Switzerland/Portugal.
🎰 CTO — BetVerse / Biteuro (2021–2022)
Switzerland (Remote) — Led 16-person engineering team building a Web3 DeFi/betting platform.
- Forked Uniswap v2 core + interface for BetVerse AMM/DEX.
- Built exchange-api (TypeScript), betverse-wallet-api (C#), betverse-bet-app (React Native).
- Contributed to batm_public (Java, 244 ⭐) — Bitcoin ATM software.
- Designed tokenomics, ICO infrastructure, NFT store.
⚡ Tech Lead — Finstro (2020–2022)
Australia (Remote) — Led B2B payments platform — multi-currency ledger, virtual cards, invoice factoring. Coordinated distributed teams (Philippines, Romania).
🧭 Technical Advisor — compra.ai, Dappier, Replay (2024–Present)
- compra.ai: AI commerce assistant — semantic search via multilingual-e5-small ONNX embeddings, GPT-4o extraction, Redis SmartSearch cache (24h TTL). Rust/Axum + React.
- Dappier: Advised on AI agent architecture (Go + Python), RAG-style flows.
- Replay/Rplay: Token strategy, Base migration from Theta, smart contracts, BigQuery→Ethereum batch pipeline (Go).
📊 View full open source contribution table
| Project | Period | Role | Stack | Evidence |
|---|---|---|---|---|
| vultisig-ios | 2024–26 | Core Developer | Swift, C, ObjC | 7,510 commits · 135 releases · 31 ⭐ · MPC ECDSA+EdDSA |
| vultisig-windows | 2024–26 | Core Developer | TS, Go, Wails | 6,423 commits · 65 releases · 15 ⭐ · Desktop + Chrome ext |
| vultiserver | 2024–26 | Core Developer | Go, Redis, Docker | 184 commits · TSS Keygen/Keysign/Reshare · api.vultisig.com |
| commondata | 2024–26 | Contributor | Protobuf, Swift, Go | 188 commits · Buf-managed · Cross-project contracts |
| Wallet Core | 2024–26 | Contributor | Rust, C++ | Cross-platform wallet lib (Trust Wallet, Exodus, Binance) |
| Core-Smart | 2017–21 | CTO / Core Dev | C++ | 29 ⭐ · Bitcoin Core fork · L1 consensus |
| beehive-desktop | 2017–21 | Architect/Dev | JS, SAPI | 6 ⭐ · Decentralized SAPI wallet |
| blockbook | 2018–21 | Contributor | Go | 738 ⭐ · Trezor fork · SmartCash port |
| smartcashjs-lib-2021 | 2019–21 | Author | JS, BitcoinJS | SmartCash SDK · Tx creation/signing |
| Uniswap v2 Core | 2021–22 | Fork/Custom | Solidity, TS | 3.4K ⭐ upstream · BetVerse AMM |
| Uniswap v2 Interface | 2021–22 | Fork/Custom | TS, React | 5.4K ⭐ upstream · BetVerse DeFi UI |
| batm_public | 2021–22 | Contributor | Java | 244 ⭐ · Bitcoin ATM software |
| BetVerse Token | 2022 | Author | Solidity | Audited & verified ERC-20 |
| rss-feed | 2025–26 | Author | Rust, tokio | LLM news pipeline · OpenRouter |
| EnriCash | 2024 | Author | Solidity, Hardhat | ERC-20 Sepolia testnet |
- Arctic Code Vault Contributor — GitHub archival program.
- 300K+ users on Aizzy.ai — co-founded, scaled production AI platform with browser-native WASM inference, zero server AI cost.
- 200+ repositories across 11 GitHub organizations — personal (94), aizzy-ai (35), SmartCash (65), Vultisig (4), biteuro-io (13), esdigitalLTDA (8), Ateliex-Group (16), betversetoken (2).
- 200+ production releases — 135 Swift iOS, 65 TypeScript/Go desktop, 30+ backend.
- Audited & verified ERC-20 token (BetVerse Token).
- Pioneered agent-based AI ~2 years before OpenAI/Google/Anthropic official agent APIs — multi-agent systems, RAG, skills injection from scratch.
- GitHub achievements: Pull Shark ×3, Quickdraw, Pair Extraordinaire.
- Lived/worked in 6+ countries — remote-native since 2016, trilingual.
- 20+ years enterprise payments (Cnova/Via Varejo — PontoFrio, Casas Bahia, Extra) seamlessly extended to crypto rails (PIX, SEPA, stablecoins, remittance).
⛓️ Blockchain Infrastructure
- L1 Protocol Engineering — 4 years maintaining Bitcoin Core C++ fork (Core-Smart), consensus-level code.
- MPC/TSS at Implementation Level — forked tss-go, bnb-tss-lib, tss-rsa-cpp; built vultiserver (Go) for Keygen/Keysign/Reshare/Migrate (GG20→DKLS); dual-ed25519 verification pipeline.
- Wallet Infrastructure — Wallet Core (Trust Wallet, C++/Rust), non-custodial architecture across 10+ chains, HdWalletKit, cross-chain transaction encoding.
- Smart Contracts — ERC-20/721/1155/2771, upgradeable, thirdweb DropERC20, staking, ICO; audited & verified ERC-20 (BetVerse Token).
- DeFi Primitives — DEX/AMM (Uniswap v2 fork), swaps, vault flows, fee logic (EIP-1559, UTXO normalization), liquidity, yield.
- Protocols — Solana (SPL, VersionedTransactions, PDAs, Anchor), EVM (Solidity, Hardhat, ethers.js), SUI, Bitcoin/UTXO, THORChain, MayaChain, Cosmos SDK, Tron.
- Cross-Chain — Ethereum ↔ Theta ↔ Solana bridges, multi-rail payment routing, BigQuery→Ethereum batch writes.
- Tokenomics — $AIZ (1B, 90/7/3, Base→Solana), $ECH, staking economics, agent marketplace economy.
🤖 AI Engineering
- Full RAG Lifecycle — server-side (LangChain Python + pgvector + Pinecone + Supabase Vector + Algolia) → browser-native (ONNX WASM + IndexedDB/Dexie + cosine similarity in Web Workers).
- Embedding Models — OpenAI Ada-002, Jina, Gemini, Cohere, Voyage AI, Xenova/paraphrase-multilingual-MiniLM, Xenova/multilingual-e5-small.
- LLM Orchestration — OpenRouter (primary), custom multi-agent system in Rust (tokio::spawn + join_all + per-agent cost tracking), LangChain (Python/Go/Rust).
- Browser AI Runtime — Whisper-tiny WASM (STT), ViT-GPT2 WASM (vision), Xenova embeddings, tesseract.js OCR — all in dedicated Web Workers, lazy-loaded, Cache API persistence.
- Agent Architecture — 3-tier memory (recent → summarized → semantic), intent classification (5 categories), query expansion, map-reduce summarization, Skills system (YAML→LLM tools), AGENTS.md discovery, Rules engine.
- Production AI at 300K-User Scale — WebSocket streaming, 6K token context budget, Stripe+PIX billing, zero PII architecture.
- Pioneered Agent-Based AI ~2 years before mainstream platform agent APIs (OpenAI Assistants, Anthropic Tools, Google ADK).
- Universidade Estácio de Sá — Bachelor's in Computer Systems Analysis (2015–2016)
- Universidade Paulista — Systems Analysis / IT (2010–2011)
- Certifications: Microsoft SQL, ASP.NET
Outside of work, I have a passion for traveling and exploring new cultures. I have had the opportunity to visit ~70 countries, and I am always planning my next adventure. I believe that my love for traveling has helped me become more adaptable and open-minded, which are essential traits for a blockchain developer working in a fast-paced and ever-changing industry.
I have faced my fair share of challenges in my career, but one of the most significant was navigating the bear market in 2018. Unfortunately, many promising L1 blockchain projects could not survive the market downturn. However, this experience taught me valuable lessons about resilience, adaptability, and the importance of building robust solutions that can withstand market fluctuations.
