Senior Software Engineer with 15+ years in web development, currently specializing in
AI Engineering, Autonomous AI Agents, Blockchain Infrastructure, and Smart Contract Security.

I work at the intersection of AI systems and decentralized infrastructure, building secure, intelligent, and scalable applications that operate across on-chain and off-chain environments.

• AI Engineering and Autonomous AI Agents
• Smart Contracts on Sui, Near,Solana and EVM-based chains
• Blockchain and Web Security
• Secure on-chain automation and protocol design

Languages

• JavaScript / TypeScript (Core expertise)
• Rust, Move, Solidity (Active specialization)
• PHP, C#, Python, Java, Kotlin, Dart (Previous production experience)

Web & App

• Node.js, Bun, Elysia.js
• Next.js, Vue, Angular, Svelte, React
• React Native

Blockchain

• Smart Contracts (Sui, Near, Solana, EVM)
• Security, auditing, and attack surface analysis
• AI-driven on-chain and off-chain automation

• rubenmarcus.sol
• rubenmarcus.sui
• rubenmarcus.eth
• rub3n.near