Smart contract engineer specialized in stablecoin and payment infrastructure across EVM and Solana, shipping end-to-end blockchain protocols and researching security in competitive audit contests. Active security researcher building AI-assisted audit workflows and reproducible exploit proof-of-concepts on forked mainnet, with regulatory/financial crypto knowledge (MiCA, accounting and compliance) supporting production-grade deployments.

Martín Casais

Smart contract engineer specialized in stablecoin and payment infrastructure across EVM and Solana, shipping end-to-end blockchain protocols and researching security in competitive audit contests. Active security researcher building AI-assisted audit workflows and reproducible exploit proof-of-concepts on forked mainnet, with regulatory/financial crypto knowledge (MiCA, accounting and compliance) supporting production-grade deployments.

Available to hire

Smart contract engineer specialized in stablecoin and payment infrastructure across EVM and Solana, shipping end-to-end blockchain protocols and researching security in competitive audit contests.

Active security researcher building AI-assisted audit workflows and reproducible exploit proof-of-concepts on forked mainnet, with regulatory/financial crypto knowledge (MiCA, accounting and compliance) supporting production-grade deployments.

See more

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert

Language

English
Advanced
Spanish; Castilian
Fluent
Galician
Fluent

Work Experience

Product Engineer (AI & Automation) at PYH Global Services Holding
March 23, 2026 - July 27, 2026
Shipped AI-assisted automation and internal tooling for legal, administrative and grant/tender workflows. Owned features end to end, from requirements to production, in a small high-ownership team.

Education

B.S. Business & Technology at Universidade de Santiago de Compostela
September 17, 2020 - July 15, 2026
Thesis: machine learning based media sentiment analysis applied to Solana price behavior (Python, NLP).
Higher Technician, Administration & Finance at Liceo la Paz
September 17, 2018 - June 17, 2020
Accounting, financial mathematics, advanced Excel.

Qualifications

Ethereum Developer Bootcamp (Alchemy University)
January 1, 2025 - January 1, 2025
Solana Builder (HackQuest × Solana Foundation on-chain credential)
January 1, 2025 - January 1, 2025

Industry Experience

Financial Services, Software & Internet, Professional Services, Education
    AutonomiX: Payment Infrastructure for AI Agents

    Payment rails for autonomous AI agents on Base. An ERC-8004 identity registry with on-chain reputation, plus x402 USDC micropayments gating API access through the HTTP 402 flow.

    Built the full stack: Solidity contracts, TypeScript backend and frontend. The payment gateway verifies on-chain settlement before releasing the API response.

    Verified contract: https://www.twine.net/signin
    Repo: https://www.twine.net/signin

    StableGuard: Modular Stablecoin Protocol

    A collateralized stablecoin protocol (CDP): core ERC-20 plus 8 composable modules including a price oracle with fallback feeds, Dutch auction liquidations with commit-reveal for MEV resistance, a repeg engine and a rate limiter.

    Gas-optimized hot paths, with unit, integration and invariant test suites in Foundry. Whitepaper included.

    Repo: https://www.twine.net/signin

Hire a Blockchain Developer

We have the best blockchain developer experts on Twine. Hire a blockchain developer today.