Jose Miguel Herrera

Staff Ethereum Engineer

SEP 2025 - AUG 2026 · 1 year

1) Increased Ethereum transaction landing rates from 95% to 99%, cutting failures from 5% to 1%—an 80% relative reduction—and saving thousands of support hours through improvements to gas estimation, fees, nonces, replacements, simulation, and observability. 2) Led the greenfield Hyperliquid/HyperCore integration as a native Exodus wallet experience, architecting a multi-package stack for Arbitrum USDC bridging, native BTC/ETH/SOL deposits, HIP-3 collateral assets, spot transfers, withdrawals, and perpetuals trading. Designed its per-account activation and fee-settlement model—including first-outbound activation, rail-specific fee handling, and activation-state caching—alongside EIP-712/msgpack signing, custom-token routing, live market feeds, and optimistic history reconciliation without conventional transaction hashes. 3) Architected a plugin-driven, cross-chain security framework covering EIP-7702 delegation detection, stablecoin blacklists, lost permissions, early risk hydration, recovery workflows, and diagnostics across mobile, desktop, and headless clients. 4) Led Exodus’s end-to-end ADI Network and ERC-20 integration across asset libraries and apps, supporting the ecosystem behind ADI Predictstreet, the first-ever Official Prediction Market Partner of the FIFA World Cup 2026. Analyzed 21,000+ Ethereum failure events to separate retry noise from user-facing failures and uncover systemic issues across gas, nonces, swaps, staking, replacements, and EIP-1559 send-all behavior. 5) Hardened WalletConnect and dApp approvals against misleading simulations by surfacing immutable signed facts—including native value and destination—when simulated balance changes were missing or inconsistent. Improved Clarity indexer and staking reliability by resolving wallet-sync timestamp corruption, reflection-token balance inflation, ERC-20 spam, RPC tracing gaps, staking preflight failures, nonce issues, and UI stalls.

Staff Engineer

SEP 2025 - SEP 2026 · 1.1 years

Led the greenfield Hyperliquid integration for Exodus, architecting support for bridging, native deposits, perpetuals, EIP-712 signing, custom routing, market feeds, and optimistic transaction reconciliation. Architected a plugin-driven, cross-chain security framework covering EIP-7702 delegation detection, stablecoin blacklists, lost permissions, early risk hydration, recovery workflows, and diagnostics across mobile, desktop, and headless clients. Increased Ethereum transaction landing rates from 95% to 99%, cutting failures from 5% to 1% — an 80% relative reduction — and saving thousands of support hours through improvements to gas estimation, fees, nonces, replacements, simulation, and observability. Led Exodus's end-to-end ADI Network and ERC-20 integration across asset libraries and apps, supporting the ecosystem behind ADI Predictstreet, the first-ever Official Prediction Market Partner of the FIFA World Cup 2026. Hardened WalletConnect and dApp approvals against misleading simulations by surfacing immutable signed facts. Improved Clarity indexer and staking reliability. Departed amid a company-wide restructuring (~25% reduction) during the pivot to payments, which primarily impacted crypto-focused roles.

Senior Software Engineer

JUN 2024 - JUL 2025 · 1.2 years

• Interpreted and analyzed the company's requirements for an AI-driven investment fund powered by modern defi standards. • Wrote detailed planning documents outlining the protocol's algorithms, data structures, user stories, and general software architecture. • Implemented the Fractality defi protocol using the latest solidity best practices, implementing quant strategies. • Created a comprehensive unit test suite using forge, code coverage, and static analysis. • Closely worked with auditors to polish the protocol for launch. • Wrote strategies for the launch and the migration of existing investors to ensure integrity and prevent losses. • Wrote supporting scalable microservices and data pipelines in TypeScript to power the Fractality product, including creating subgraphs for the front end to consume. • Spearheaded the protocol's move from Arbitrum to Hyperliquid, ensuring safety and consistence for all token holders of $Y2K -> $FRCT. Done with a combintion of smart contracts and offchain typescript microservices. • Implemented points system to reward participants in the protocol. • Created Telegram bot that allowed users to interact with the Fractality ecosystem.

Lead Solidity Engineer & Software Architect

JUN 2024 - JUN 2025 · 1.1 years

Architected and implemented a delta-neutral DeFi protocol (TVL ATH ~$3M) using the latest Solidity best practices, including the first EIP-7540 implementation processing over $7M USDT. Wrote detailed planning documents defining the protocol's algorithms, data structures, user stories, and software architecture, inspired by Ethena and Morpho. Coordinated with external auditors to ensure protocol safety standards, delivering a flawless mainnet launch. Spearheaded the protocol's move from Arbitrum to Hyperliquid, safely migrating millions of dollars of $Y2K → $FRCT tokens to Hyperliquid L1 & HyperEVM. Built a comprehensive Forge test suite with coverage and static analysis, plus TypeScript microservices and subgraphs powering the product. Implemented points system to reward participants in the protocol.

Senior Software Engineer (Web3/Solidity Protocol)

MAR 2022 - MAY 2024 · 2.3 years

Implemented the design for the 4K protocol as a set of Solidity smart contracts, including complex features such as rewards, governance, insurance, and DePIN features. At its peak, safely stored ~2 million dollars worth of luxury items. Helped design the logic, tokenomics, user experience and governance of the 4K protocol. Created a fully on-chain DAO for the 4K protocol's governance. Implemented a custom token reward system to incentivize user engagement within the protocol. Implemented a full-coverage testing suite of the 4K protocol smart contracts (Hardhat/Foundry). Created internal tools to help all steps of the blockchain development lifecycle, including testing, deployments, monitoring, and contract upgrading.

Senior Software Engineer

MAR 2022 - APR 2024 · 2.2 years

- Implemented the design for the 4K protocol as a set of Solidity smart contracts, including complex features such as rewards, governance, insurance, and dePIN features. - Helped design the logic, tokenomics, user experience and governance of the 4K protocol. - Created a fully on-chain DAO for the 4K protocol's governance. - Implemented a custom token reward system to incentivize user engagement within the protocol. - Implemented a full coverage testing suite of the 4K protocol smart contracts. - Created internal tools to help all steps of the blockchain development lifecycle, including testing, deployments, monitoring, and contract upgrading. - Worked alongside the frontend and dapp team to deliver a top notch web3 experience.

Blockchain Advisor

AUG 2021 - JAN 2024 · 2.5 years

- Led the design of Productshare technical infrastructure - Created microservices to power Productshare's blockchain capabilities. - Created smart contracts and maintained them on multiple blockchain networks. - Led the technical effort in the token sale, creating a token sale portal and a bespoke token sale contract while using third party tools (Hedgey) for vesting. - Helped manage the multisig company treasury using Gnosis SAFE and cold storage. - Set up DAO for onchain governance.

Technical Advisor

AUG 2021 - MAR 2024 · 2.7 years

Built multi-chain smart contracts, token sale infrastructure, treasury management, and DAO governance for ProductShare. Integrated the Stripe API to create a financial reserve connection backing the ProductShare stablecoin.

Software Engineer

NOV 2020 - FEB 2022 · 1.3 years

Helping build Triple Point Liquidity's advanced platform for complex private equity transactions, which uses blockchain to facilitate and ledger the transaction of private and illiquid assets. Touching the full stack: TypeScript, Node.js, Loopback, Hyperledger Fabric, mongoDB, couchDB, Docker, React, Webpack, CI/CD, NGINX, x-state, mocha. Create and maintain technical documentation and unit test suites. Software engineering work within a fully remote, high communication, and motivated team.

Lead Engineer

AUG 2018 - OCT 2020 · 2.3 years

Lead full stack developer of all Novera products. Reporting directly to the CTO. Developed decentralized financial derivatives and scalable distributed systems. - Designing all software architecture according to business requirements before coding them. - Using solidity, web3js, react, ganache, mythril, truffle, and meadowsuite for ethereum blockchain product development. Additional experience with bitshares infrastructure and assets. - Developing private fund software (backend: NodeJS, MongoDB) for maximum scalability and performance. - Own devops and cloud infrustructure processes (Azure, AWS, Heroku) - Helping implement organizational and infrastructure cybersecurity. - Built a distributed HSM system using state of the art encryption/cybersecurity for blockchain operations. - Showed leadership by aiding in the hiring process to grow and train the engineering team. Working with frontend developers and contractors to create fully functional products.

Lead Software Engineer

AUG 2018 - OCT 2020 · 2.3 years

Led full-stack development of all Novera products, reporting directly to the CTO. Developed decentralized financial derivatives and scalable distributed systems. Developed detailed software architectural plans framed around specific business prerequisites, enabling effective project implementation. Used Solidity, web3.js, React, Ganache, Mythril, Truffle, and Meadow Suite for Ethereum blockchain product development. Developed private fund software (backend: Node.js, MongoDB) for maximum scalability and performance. Built a distributed HSM key management system using state-of-the-art encryption/cybersecurity for blockchain operations, which was sold to a banking group for 1 million USD per year.

Software Engineer Intern

JUL 2018 - SEP 2018 · 3 months

Helped bring the Polymath dApp to mainnet. Shipped version 1.3 with new features. Used Solidity, Web3.js, React, Redux, Ganache.

Software Engineer / Developer

JUN 2018 - AUG 2018 · 3 months

Helped bring the Polymath Dapp to main net. Shipped version 1.3 with new features (see link for details). -Solidity -Web3js -react -redux -ganache

Software Engineer

JAN 2018 - JUN 2018 · 6 months

-Creating custom full stack software to increase Bitcoin adoption in Canada, specially in regards of banking/regulatory compliance. KYC/AML. -Using statistical predictive analysis to make Bitcoin mining more profitable. -Automatization of Bitcoin related tax accounting.

Next36 Selection Weekend Finalist

NOV 2017 - DEC 2017 · 2 months

Blockchain Technology Advisor / Blockchain (Solidiy) Engineer

AUG 2017 - DEC 2017 · 5 months

Adappcity identifies and develops blockchain solutions that are socially and economically valuable. Independent contractor: -Created software architecture for a decentralized art market based on ethereum. -Assisted with digital marketing, strategy, and web development. -Provided blockchain expertise services.

Software Developer Internship

MAY 2017 - AUG 2017 · 4 months

-Architected and implemented a scalable software project to automate marketing science activities (NodeJS/GraphQL/MongoDB) -Worked on the Travel Alberta account (web development) -Created a React Native application for internal use. -Participated in the Citi FinTech CitiBlue reboot challenge. UI/UX/technical feasibility/fintech research/requirement analysis

Software Developer Intern

MAY 2017 - AUG 2017 · 4 months

Architected and implemented a scalable software project to automate marketing science activities (Node.js/GraphQL/MongoDB).

Business Process Management Developer Intern

MAY 2015 - AUG 2016 · 1.3 years

Developed, maintained, and tested IBM's Business Process Management software.