Onchain protocols · Quantitative DeFi · Risk monitoring · Cross-chain yield optimization
_{Madrid, Spain}

Software Engineer at Bending Spoons, on the WeTransfer team (since Aug 2026).

Lead Engineer at Sail — open-source infrastructure for onchain separately managed accounts. I founded the intelligence layer from a blank page, and since March 2026 I own technical direction across the whole stack: Solidity protocol, TypeScript SDK/CLI, Python services, docs.

• Sail Protocol — a minimal account-abstraction primitive for SMAs. Capital stays in a self-custodial Safe; a mandate is a set of user-deployed IPermission contracts, and the kernel evaluates the named permission via staticcall under a fixed gas cap, forwarding to the Safe only on true. Reentrancy and state mutation are structurally impossible; every failure mode is fail-closed. Trusted core ~1,022 nSLOC, reviewed by Octane across three analyses, deployed at identical CREATE2 addresses on 12 chains.
• Sailor — the open-source harness that turns any AI coding agent into a builder and operator of DeFi agents. SDK (encrypted keyring, EIP-712 signing, dispatch submission), CLI, local dashboard, and 22 agent skills. Shipped on npm as @sail.money/sailor — MIT.
• Cross-chain optimization engine — constrained MDP formulation, simulated annealing with Metropolis-Hastings acceptance, CNN meta-controller predicting hyperparameters from APY/TVL history (3-5× search-space reduction). Energy-aware cost model covering execution, slippage, and TVL-dependent price impact.
• Sonar (risk monitoring) — z-score anomaly detection over multi-horizon baselines (1d / 7d / 30d), dual-mode SPIKE/TREND scoring, tier-based execution cycles, financial-inertia mechanism that cut unnecessary portfolio churn by 43 %.

I also defined the database schema, built the first user-facing UIs, and represented the intelligence layer to venture investors during fundraising rounds and the CEO during roadmap discussions.

The full mathematical framework is documented in two public research papers I authored (sole author).

First six months in production: ~$700M of volume routed for ~200 users at ~$600k TVL.

All returns net of every fee in the cost model.

Sonar suspended user exposure ahead of two publicly confirmed exploits — detection happened before public confirmation in both cases:

• Moonwell oracle exploit · Feb 15, 2026 — $1.78M bad debt, 181 borrowers harmed.
• Resolv Protocol exploit · Mar 22, 2026 — ~$80M minted via a compromised AWS KMS key, ~$25M extracted.

All sole-author work.

• ✍️ Quant Mentality: How We Use Convolutional Networks to Outyield DeFi · long-form · May 2026
• 📄 Cross-Chain Optimization Engine V2 — Smart Spike Framework · paper · Jan 2026
• 📄 Cross-Chain Optimization Engine V1 · paper · Oct 2025
• 📊 Sail Agent Performance Analysis — Q4 2025 · report · Jan 2026
• 📊 Sail Agent Performance Analysis — Q1 2026 · report · Apr 2026

B.S. Computer Science — Universidad Politécnica de Madrid · 2019 – 2023 GPA 8.56 / 10. Matrículas de Honor in Operating Systems, Compilers, Semantic Web & Knowledge Graphs, Art of Programming, Prolog, Programming Project, Data Center Project.

 alonso.miguel.alvaro1@gmail.com

 alvaro-alonso-miguel