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Software engineer with 9 years of software engineering experience and 5 years in blockchain, specializing in full-stack DeFi engineering. Builds end-to-end backends and custom indexers for high-throughput real-time on-chain data services using PostgreSQL with TypeScript or Rust, paired with Next.js/React frontends. Works across both protocol and application layers, including high-performance MEV searcher systems, LST/vault integrations, and governance interfaces. Has shipped production systems for MEV searchers, indexers, on-chain execution components, governance platforms, and NFT marketplaces.…Software engineer with 9 years of software engineering experience and 5 years in blockchain, specializing in full-stack DeFi engineering. Builds end-to-end backends and custom indexers for high-throughput real-time on-chain data services using PostgreSQL with TypeScript or Rust, paired with Next.js/React frontends. Works across both protocol and application layers, including high-performance MEV searcher systems, LST/vault integrations, and governance interfaces. Has shipped production systems for MEV searchers, indexers, on-chain execution components, governance platforms, and NFT marketplaces.

Fernando Rodriguez Hervias

Full Stack Developer, Back-End Developer, Front-End Developer, +4

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Software engineer with 9 years of software engineering experience and 5 years in blockchain, specializing in full-stack DeFi engineering. Builds end-to-end backends and custom indexers for high-throughput real-time on-chain data services using PostgreSQL with TypeScript or Rust, paired with Next.js/React frontends. Works across both protocol and application layers, including high-performance MEV searcher systems, LST/vault integrations, and governance interfaces. Has shipped production systems for MEV searchers, indexers, on-chain execution components, governance platforms, and NFT marketplaces.…Software engineer with 9 years of software engineering experience and 5 years in blockchain, specializing in full-stack DeFi engineering. Builds end-to-end backends and custom indexers for high-throughput real-time on-chain data services using PostgreSQL with TypeScript or Rust, paired with Next.js/React frontends. Works across both protocol and application layers, including high-performance MEV searcher systems, LST/vault integrations, and governance interfaces. Has shipped production systems for MEV searchers, indexers, on-chain execution components, governance platforms, and NFT marketplaces.

Available to hire

Software engineer with 9 years of software engineering experience and 5 years in blockchain, specializing in full-stack DeFi engineering. Builds end-to-end backends and custom indexers for high-throughput real-time on-chain data services using PostgreSQL with TypeScript or Rust, paired with Next.js/React frontends.

Works across both protocol and application layers, including high-performance MEV searcher systems, LST/vault integrations, and governance interfaces. Has shipped production systems for MEV searchers, indexers, on-chain execution components, governance platforms, and NFT marketplaces.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

MEV arbitrage bot developer

September 1, 2025 - May 1, 2026

Built an atomic MEV arbitrage searcher on Base in Rust using off-chain cycle discovery (BFS). Detects profitable paths in under a millisecond by mirroring Uniswap math and tick-offs-chain; supports v2/v3/v4 and competitor venues. Uses Flashbots and deploys a Base Reth node on AWS to accelerate simulations.

Senior Software Engineer at Hydrogen Labs

May 1, 2024 - Present

Lead developer on Monad-related LST and vault work (e.g., Magma and Rove r), designing and shipping an ERC-7540 asynchronous vault integrating Monad staking precompile and an LidoV3-style vault. Built MEV client design research, evaluated PB S-style approaches and JIT off-chain bundle auctions with revert protection. Implemented the Envio indexer and PostgreSQL/TypeScript backend to ingest 10M+ on-chain events and serve leaderboard/referral/partner integrations; shipped frontend in Next.js/React/Wagmi.

Senior Full Stack Engineer at Hydrogen Labs

May 1, 2024 - Present

Led development of Magma on Monad LST (staking precompile integration) and Rover; shipped v1/v2 contracts; designed MEV-focused client logic; enabled 10M+ on-chain events in near real-time using Envio, PostgreSQL, and TypeScript.

Senior Software Engineer at Agora

November 1, 2023 - April 30, 2024

Built Optimism’s governance UI—the canonical voting interface for on-chain governance—using Next.js, React, and PostgreSQL.

Founder at Pra gmaLayer

August 1, 2023 - July 1, 2025

Founded a Web3 studio across DeFi, NFTs, and developer tools. Notable engagements include fxhash (website + $FXH token and artworks on Hasura/PostgreSQL/Next.js/React), Coinbase (UX research for Coinbase Developer Platform), Delo re an Exchange (implemented APY indexing for competitor protocols), and ManapuaFace (shipped a 10,000 NFT collection with Merkle allowlist phased mint, per-wallet mint caps, and on-chain provenance hash).

Founder at PragmaLayer

August 1, 2023 - July 31, 2025

Founded a Web3 studio working across DeFi, NFTs, and developer tools; shipped token deployments and tooling for the space; led design and product direction.

Hackathon participant at ETHGlobal Lisbon

May 1, 2023 - Present

Built a transparent public-good dApp integrating Worldcoin proof-of-personhood (Filecoin/FVM storage), The Graph indexing, and Polygon account abstraction.

Hackathon participant at ETHDenver

March 1, 2023 - Present

Built Royalty Loyalty, a proposed ERC-2981 extension defining standardized royalty payment events and an on-chain payment hook. Shipped a reference NFT marketplace deployed via CREATE3 across 6 EVM testnets, a subgraph for indexing royalty events, and a creator dashboard with Lens integration.

Founder at Open Beats

October 1, 2022 - July 1, 2023

Built OpenBeats ERC-1155 smart contracts where every playlist is a tokenized asset, with 100% unit test coverage in Foundry. Shipped a Spotify-style media player across web (React/Next.js), desktop (Electron), and iOS/Android (Capacitor) with a backend integrating the YouTube API.

Founder at OpenBeats

October 1, 2022 - July 31, 2023

Established an NFT/Music tech project; shipped an ERC-1155 smart-contract-based asset set; delivered a Spotify-like music player across web/desktop/mobile with backend integration.

Founder at RentalPlus

May 1, 2019 - May 31, 2022

Bootstrapped a Spanish car rental business to €3M annual revenue; scaled to 2,000 customers across 75 offices with a 50-vehicle fleet; built end-to-end MERN stack with payments integration.

CTO at Ocasio n Plus

July 1, 2018 - May 1, 2022

Migrated the legacy PHP website to a MongoDB/Express/React/Next.js/Node.js stack while serving ~2.5M visits/month eight years later. Scaled to ~€1B revenue and 1,700 employees. Led a 10-person technical team across frontend/backend/infrastructure; brought third-party services in-house on AWS (ECS/EC2/S3) reducing technical debt and improving backend media API response times to under 200ms.

CTO at Occasion Plus

July 1, 2018 - May 31, 2022

Migrated legacy PHP site to MERN stack (MongoDB, Express, React, Node.js); scaled to millions of visits; built a MERN-based booking and pricing engine; led a 10-person team.