Lucas Barcelos

AI Fullstack Engineer · Blockchain · Multi-Agent Systems

luqalabs@gmail.com · t.me/lucxsweb3 · github.com/lucxsdev2

Summary

Engineer with ten years in blockchain and protocol development and six years building regulated financial infrastructure in Banking as a Service. Over the last four years my work has focused on production LLM applications: agent runtimes, multi-agent systems, AI SDKs, and autonomous workflows.

Experience

LLM Applications and Agent Infrastructure

Last 4 years

Architecture for production LLM applications, agent runtimes, and autonomous workflows.
Context engineering, tool calling, and structured outputs.
Multi-agent systems and the coordination layer between agents.
Evaluation infrastructure and semantic retrieval.
AI SDKs and developer tooling.
Blockchain AI applications supporting autonomous agents on Solana, Ethereum, NEAR, Sui, and Cardano.

Blockchain and Protocol Engineering

10 years

EVM layer 1 networks: chain configuration, node operation, and the contract layer above it.
EVM layer 2 networks, including bridging, fee, and settlement behavior.
Non-EVM chains with different account, execution, and fee models.
Bitcoin forks: consensus parameters, node builds, and supporting tooling.
AMMs and DeFi primitives: pricing, liquidity, routing, and position accounting.

Fullstack Engineering, Banking as a Service

6 years

Banking as a Service platforms built on core banking rails.
Backend services for accounts, payments, and transaction flows.
Customer-facing and internal interfaces over those flows.
Auditability, idempotency, and reconciliation in regulated financial systems.

Technical skills

Stack: Solidity, TypeScript, React/Next.js, Rust, Node.js, GraphQL, Hardhat, Foundry, Web3.js, Ethers.js, Wagmi/Viem
AI engineering: Context engineering, tool calling, structured outputs, agent harnesses, evaluation infrastructure, semantic retrieval, multi-agent orchestration
Networks: Ethereum, BSC, Polygon, Arbitrum, Optimism, Avalanche, Base, Solana, TON, Fantom, Matchain

Education

Systems Analysis and Development

Technologist degree