ccolorado

Blockchain Engineer & Smart Contract Developer

Senior Blockchain Engineer with 8+ years of experience in smart contract development on Ethereum and EVM-compatible chains. Expert in Solidity, security auditing, and optimization. Specialized in DeFi protocol development, staking mechanisms, and cross-chain solutions. Proven track record of reducing gas costs by up to 60% and implementing enterprise-grade security measures. Experienced team leader and mentor with a focus on delivering scalable blockchain architectures.

Experience: 5 years

Yearly salary: $150,000

Hourly rate: $80

Nationality: 🇲🇽 Mexico

Residency: 🇲🇽 Mexico


Experience

Sr. Software Engineer — AI Engineer (Contract)
DRW
2025 - 2026
Designed and deployed multi-agent orchestration systems using LLM-driven workflows, implementing orchestrator/executor patterns to parallelize agentic task execution across isolated context windows. Built a production-grade persistent memory system for AI agents using structured markdown as a second brain — a retrospective skill analyzed agent communications to surface lessons learned and failure patterns, auto-generating indexed knowledge documents that reduced redundant context and optimized token consumption. Architected and delivered an OTC trading system MVP using DAML on the Canton Network, securing executive approval and transitioning into active production development. Implemented adversarial code review agents that autonomously identified implementation gaps and fed issues back into the orchestrator's task queue, closing the feedback loop without human intervention. Developed postmortem agents that extracted heuristics from technical lead PR feedback, continuously hydrating agent skills and improving workflow performance over time. Contributed to the Canton App Platform — hosted infrastructure combining AWS deployment with an app store model for real-world asset tokenization. Enforced e2e testing via Playwright as a hard prerequisite gate before review tasks could proceed, ensuring production-grade quality standards.
Lead Smart Contract Engineer
Compound Finance
2022 - 2022
Developed the core Solidity implementation for a next-generation decentralized protocol enabling N-to-N cross-chain communication, allowing seamless transfer of assets, data, and smart contracts. Designed and optimized modular, composable smart contracts, improving protocol flexibility and interoperability with existing DeFi and NFT standards. Enhanced security by conducting rigorous code audits and integrating automated testing frameworks, proactively identifying vulnerabilities and maintaining enterprise-grade security.
Lead Blockchain Engineer
Bridgemutual.io
2021 - 2022
Engineered and deployed a decentralized insurance protocol for the DeFi industry, supporting staking, yield farming, and DAO governance. Implemented multichain deployments across Ethereum, Solana, and Polygon, ensuring seamless cross-chain interoperability and scalability. Developed and optimized smart contracts with ERC-721 and ERC-1155 NFT standards, enabling flexible asset management and unique token functionality. Integrated IPFS for decentralized, efficient, and secure off-chain data storage. Integrated with leading DeFi protocols (Compound, Aave, Yearn) to drive interoperability and expand protocol capabilities. Enhanced smart contract architecture by implementing upgradability features and mitigating size limitations. Integrated multiple token types, including stablecoins like DAI and USDT, ensuring broad liquidity and ecosystem compatibility. Established front-end implementation guidelines, aligning the user interface with protocol functionality and blockchain interactions. Optimized gas efficiency, reducing transaction costs and frequency to improve protocol performance and user experience. Conducted public chain testing and debugging, ensuring robust performance and reliability across multiple networks.
Sr. Blockchain Engineer
Bloksports.com
2020 - 2021
Developed and deployed a fully decentralized sports betting platform, eliminating the need for a centralized 'house' and enabling users to set their own odds in an open betting market. Implemented multichain support on Ethereum and BSC, enhancing scalability and cross-chain interoperability. Designed and optimized smart contracts using ERC-721 and ERC-1155 NFT standards to support unique digital assets and betting mechanisms. Integrated IPFS for decentralized data storage, ensuring tamper-proof and efficient off-chain data management. Built upgradable smart contracts, allowing seamless protocol evolution while mitigating size limitations. Integrated multiple token types, including stablecoins like DAI and USDT, ensuring broad liquidity and versatile betting options. Established front-end implementation guidelines, aligning user interface functionality with complex blockchain interactions. Optimized gas costs and transaction efficiency, reducing fees and frequency to improve platform performance and user experience. Conducted thorough public chain testing and debugging, ensuring robust performance and reliability across multiple networks.
Lead Blockchain Engineer & Project Manager
BC4NB-NOB
2019 - 2020
Sourced and led a cross-functional development team, overseeing the full project lifecycle — from planning and architecture to deployment and maintenance. Defined project scope, timelines, and milestones, ensuring on-time delivery through effective task prioritization and Agile methodologies. Designed and implemented core smart contracts to manage insurance policies, enabling transparent and immutable transactions on the Ethereum blockchain. Developed a token staking system, allowing users to earn passive income by staking tokens and supporting ecosystem growth. Integrated decentralized services into a seamless, user-friendly ecosystem, enhancing adoption and accessibility. Collaborated with stakeholders to align technical development with business objectives, ensuring a balance between functionality and long-term vision.
Lead Blockchain Engineer
Real Estatr & Wealth Mgmt.
2018 - 2019
Led the end-to-end development of a fully on-chain real estate crowdfunding platform, enabling secure and transparent investment opportunities in real estate projects. Designed and implemented ERC-20 tokens for real estate investments, ensuring interoperability, security, and compliance with Ethereum standards. Developed a dynamic token sale mechanism, allowing real-time adjustments to token distributions based on evolving funding goals and project timelines. Collaborated closely with stakeholders, translating business requirements into robust blockchain solutions and aligning technical architecture with strategic objectives. Ensured smart contract reliability through rigorous unit and integration testing, leveraging OpenZeppelin libraries and best practices for security and efficiency. Optimized gas costs and performance, ensuring cost-efficient transactions without sacrificing protocol functionality.

Skills

ethereum
evm
zk-snark
solidity
english
spanish