S. Borjas
Blockchain & Digital-Assets Engineer · Institutional Settlement (Canton / Daml) · Java · Spring Boot · Solidity
Professional Summary
Blockchain engineer specializing in institutional digital-asset settlement, with a markets background and a 96-claim patent filing. Most recently built CrossDesk — a full-stack settlement desk on the Canton Network: Daml smart contracts, a Java / Spring Boot service over the Ledger API, and a React front end, with atomic delivery-versus-payment (DvP) and per-party privacy — the exact institutional pattern behind platforms like JPMorgan's Kinexys. Previously built Dina Network, a Layer-1 blockchain from scratch in Rust (BFT consensus, WASM VM), and Banco El Tesoro, a LATAM stablecoin neobank. Ex-equities & derivatives trader ($250M+ volume, Bookmap/Java, opening & closing auctions, index rebalancing) who went deep on the settlement rails. Also pioneered on-chain USDC escrow and pay-per-visit stablecoin payments across Base and Circle's Arc. Google Cloud Partner & Google AI Innovate (inaugural cohort); Jason Calacanis Incubator graduate; Circle Alliance early-access builder. Incorporated in Delaware (Lucilla, Inc.) and Canada.
Key Accomplishments
CrossDesk — Best Financial Application, HackCanton Season 2
Sealed closing auction, K-of-N committee-attested NAV and atomic in-kind create/redeem for tokenised funds — Daml + Java/Spring Boot (Ledger API) + React. Live on the shared Canton participant; 30 templates, 213 ledger tests.
Dina Network — Layer-1 in Rust
Built an L1 from scratch: TurboBFT (Tendermint-family) consensus with ~100ms hard finality, WASM VM, libp2p; live 3-validator testnet
Ex-Equities Trader (Java, $250M+)
Built modules in Java on Bookmap (pro order-flow / market-depth platform); traded $250M+ institutional volume across NA & EU markets
96-Claim Patent Filing (11 clusters)
Pay-per-visit stablecoin payments, on-chain escrow, multi-sensor proof, voice AI agent, creator monetization
On-Chain USDC Escrow & CCTP
Upgradeable Solidity escrow (create/join/settle/refund, atomic multi-winner payouts) + CCTP V2 burn-and-mint across Base and Circle's Arc
Google & Circle Programs
Google Cloud Partner + AI Innovate (inaugural cohort); Jason Calacanis Incubator; Circle Alliance / Arc early-access builder
Technical Skills
Blockchain / Digital Assets
Daml · Canton · Ledger API (gRPC) · DvP / Atomic Settlement · Solidity / Hardhat / OpenZeppelin · UUPS Proxy / AccessControl / ReentrancyGuard · Circle USDC / CCTP / Modular & UCW Wallets · On-Chain Escrow / ERC-20 / Base L2 · Chainlink Oracles · Wormhole / Stargate / LayerZero Bridges · Rust · BFT Consensus · WASM · Smart-Contract Security
Markets / Trading
Market Microstructure · Opening/Closing Auctions · Index Rebalancing · Merger-Arbitrage · Order Flow (BBO / MBO) · Options & Derivatives · Historical Backtesting · Limit-Order-Book Data (LOBSTER) · Bloomberg / Reuters / Koyfin / Barchart · Polygon / AlphaVantage / ThetaData · Binance / Deribit / BitMEX / Coinbase
Backend / Cloud
Java / Spring Boot · TypeScript / Node.js (600+ Cloud Functions) · Python · Docker / Kubernetes / Helm (GKE) · GCP (BigQuery, Pub/Sub, Secret Mgr, Cloud Run) · Firebase / Firestore · Apache Kafka / Redis · REST / gRPC · TDD
Frontend / Mobile
React / Next.js / TypeScript · Flutter / Dart (1,155 files) · React Native (Expo)
AI / ML / Agents
Google ADK / Multi-Agent Orchestration · Gemini / Vertex AI / Claude · NLP-to-Transaction pipelines · BigQuery ML / Bandit Optimization · XGBoost / LSTM / TFT (trading) · H3 Geospatial / Sensor Fusion
Experience
Founder, CEO & Sole Engineer — Lucilla, Inc.
Jan 2025 – Present
Architected and wrote the entire stack solo — 1.4M+ lines: 5 Solidity contracts (1,866 lines), 600+ Cloud Functions, 1,155 Dart files. Dual-chain (Base + Circle's Arc). Incorporated in Delaware + Canada; 96-claim patent filed.
Blockchain, Stablecoins & Smart Contracts
- Architected and shipped 5 upgradeable Solidity contracts (UUPS proxy, AccessControl, ReentrancyGuard) for on-chain escrow, payments, creator monetization, and an agent registry — deployed and verified on Base and Circle's Arc.
- Engineered on-chain USDC escrow for real-money competitions — full lifecycle (create, join, settle, refund) with configurable fees, atomic multi-winner payouts, and anti-replay protection.
- Implemented cross-chain CCTP V2 bridging (burn-and-mint) between Base and Arc, with atomic on-chain fee splitting; among the first builders on Circle's Arc with direct product-team engagement.
- Built the advertiser-funded reward-pool contract that autonomously pays USDC to wallets on cryptographically verified physical presence — a first-of-its-kind pay-per-visit model.
Agentic Wallets & AI / Data
- Built a 4,676-line agentic wallet executor — an AI agent parsing natural-language commands into on-chain transactions (65+ tool functions: send USDC, escrow, claims) via Gemini function calling; programmable spending-rule wallets with per-tx limits and daily caps.
- Engineered a location-intelligence + BigQuery ML pipeline (real-time analytics, predictive modeling, self-optimizing campaigns) and patent-pending multi-sensor presence verification.
Equities & Derivatives Trader — Proprietary Trading Firm
2019 – 2023
- Traded $250M+ in size across North American and European markets — opening/closing auctions, index add/delete rebalancing, merger-arbitrage & buyouts, small-cap, and mean-reversion / trend-following strategies; also traded Canadian, Brazilian, and Mexican markets.
- Order-flow & market-microstructure trading on Bookmap (BBO & MBO — market-by-order), building automated / systematic trading algorithms and Java modules on streaming market-depth data; options & derivatives analysis with historical backtesting.
- Built research & execution data pipelines in Python + Apache Kafka — market data from Polygon, AlphaVantage, ThetaData, storage on Amazon S3; research across Koyfin, Barchart, Bloomberg, Reuters & CNBC, plus earnings/filings and economic-calendar event trades.
- Traded crypto & derivatives across Binance, Deribit, BitMEX, Bitget, Coinbase; hands-on with DeFi (Uniswap, MetaMask / Phantom / Base App), Circle Console, Chainlink oracles, and cross-chain bridges (Wormhole, Stargate, LayerZero).
Full-Stack Developer — Freelance
2019 – Present
- Delivered 10+ production mobile & web apps (Flutter + Firebase / React Native) with secure payment integrations (Stripe, Plaid), analytics, and PCI-DSS-aware flows.
Featured Projects
CrossDesk — Price Discovery, Attested NAV & Settlement on Canton
Winner — Best Financial Application, HackCanton Season 2 Grand Final. A trading venue and valuation engine for tokenised funds on the Canton Network: Daml smart contracts, a Java / Spring Boot service over the Ledger API (gRPC), and a React/TypeScript desk. A sealed closing auction that discovers a uniform price, a K-of-N committee that attests a valuation recipe so the ledger keeps deriving NAV between strikes, atomic in-kind creation and redemption, a continuous order book, and cash-settled perpetuals. The resting book is invisible even to the auditor while every fill prints to an anonymous public tape. Real BitSafe cBTC claimed via the CIP-56 registry flow. 30 templates, ~15,700 lines of Daml, 213 ledger tests asserting cash conservation on every settlement path. Live on the shared Canton participant.
Daml · Canton · Ledger API · Java · Spring Boot · React/TS · Sealed auction · K-of-N attestation · Atomic DvP · Perpetuals · CIP-56
Dina Network — Layer-1 Blockchain (Rust)
Built a Layer-1 blockchain from scratch in Rust: TurboBFT (Tendermint-family) consensus with ~100ms hard finality, a WASM smart-contract VM, and libp2p networking (~100K LOC). Live 3-validator testnet with SDKs, explorer, and dev portal.
Rust · BFT Consensus · WASM · libp2p · P2P · USDC-native gas
Banco El Tesoro — LATAM Stablecoin Neobank
Circle-powered · Base / Arc testnet
A stablecoin neobank & remittance app for Latin America: a local-currency stablecoin, P2P send, bank ACH withdrawal, merchant pay, and human-agent cash-in / cash-out. Built on Circle (user-controlled + dev-controlled wallets, challenge→confirm PIN flows) across Base Sepolia and Circle's Arc. Backend Express + Circle; Next.js web; React Native (Expo) mobile.
Circle USDC · UCW / DCW Wallets · Stablecoin (HNLc) · Base / Arc · Express · Next.js · React Native · Remittances
Obol — Pay-Per-Call API Marketplace for AI Agents
MCP-native marketplace where AI agents discover, pay for, and call metered services in USDC — no subscriptions, no API keys. Built on Circle's Arc using x402 and EIP-3009; published on Smithery, npm (@superbigroach/obol-mcp), and the official MCP registry.
Arc / USDC · MCP · x402 · EIP-3009 · Next.js · TypeScript
Lucilla — Stablecoin Fitness & Geo-Ad Platform
First-of-its-kind stablecoin rewards platform: users earn real USDC to move, compete, and show up; businesses fund on-chain campaigns and pay only for GPS-verified, on-chain visits. Cross-chain CCTP bridging, a voice AI agent with 65+ blockchain operations, and creator monetization — built solo from zero.
Flutter · Firebase · Solidity · Circle USDC · Base / Arc · CCTP · Gemini AI · H3 Geospatial
Telamar — Autonomous Trading & Research
24/7 crypto trading bot with a multi-model ML ensemble (XGBoost, LSTM, TFT): self-learning parameter optimization, ATR trailing stops, 22 pairs on Binance Futures. Real-time data pipelines (Apache Kafka), Python/Java.
Python · Java · XGBoost · LSTM · TFT · Kafka
Education & Certifications
Software Development — Mohawk College
2019 – 2020
Business / Commerce — McMaster University
2016 – 2018
Certifications: Technical Solutions Architect — Digital Asset (Daml / Canton, 2026) · Bloomberg Market Concepts · MLOps for Generative AI · Build Generative AI Agents with Vertex AI & Flutter · Gemini for Data Scientists · AI Agent Integration with Flutter
Community & Affiliations
Circle Arc — House Architect · Superteam Canada (Solana) · Agentics Foundation — Active Member (2025) · Builder House — Waterloo (Jesse Rodgers) · HispanoTech — Toronto (Latino tech community) · Senior Companionship (retirement / LTC homes) · Eden Food Bank · Immigrants Working Centre (settlement support)