Ferran Borreguero
Senior Back End Developer at Flashbots
Greater Valencia Metropolitan Area Spain
Summary
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Rockstar🎓
Top SchoolFerran Borreguero is a Senior Back End Developer with 8 years of experience building performant blockchain infrastructure and distributed systems, currently contributing at Flashbots after a staff engineering role at Polygon Labs. He has deep hands-on expertise in Go, having improved core components of the Polygon client (downloader, txpool, CLI, Heimdall integration) and streamlined Ethereum tooling in the ethgo project by removing heavy dependencies and integrating the Solidity compiler. A former founder and CEO, he blends product-minded leadership with low-level engineering, shipping protocol-critical changes in high-stakes open-source projects. Trained in parallel and distributed computing at UPV, Ferran brings an uncommon combination of academic grounding and practical blockchain protocol work from contributions to well-known repositories in the Polygon and Ethereum ecosystems.
8 years of coding experience
5 years of employment as a software developer
Hong Kong University of Science and Technology (HKUST)Politecnico di MilanoUniversitat Politècnica de València
Stackoverflow
1reputation
0reached
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Github Skills (12)
compiler10
compiler-compiler10
go10
solidity10
api10
borsh10
back-end-development10
ethereum10
blockchain10
command-line9
cli9
command-line-interface9
Programming languages (11)
Github contributions (5)
umbracle/ethgo
Mar 2019 - Jan 2023
Ethereum Golang API
Role in this project:
Back-end Developer
Back-end DeveloperContributions:35 reviews, 277 commits, 307 PRs in 3 years 11 months
Contributions summary:Ferran's commits primarily focused on adding and modifying code related to the Solidity compiler and Ethereum API for the ethgo project. The contributions involved downloading and integrating the Solidity compiler, which is central to interacting with Ethereum smart contracts. Further, the changes included removing dependencies on geth and restructuring the code to remove minimal types and dependencies, demonstrating a focus on reducing dependencies and enhancing the efficiency of the Ethereum Golang API.
golangapietherscanethereumabi
maticnetwork/bor
Sep 2021 - May 2022
Official repository for the Polygon Blockchain
Role in this project:Back-end Developer
Back-end DeveloperContributions:108 reviews, 126 commits, 26 PRs in 7 months
Contributions summary:Ferran focused on implementing and modifying core backend functionalities of the Polygon blockchain project. They made changes to the downloader component, specifically concerning binary search optimization. Additionally, the user contributed to the development of a new command-line interface for the project. Furthermore, they added configurations and flags for server operations, including Heimdall integration, and made changes to the core txpool component.
stakingborethereumblockchainmatic
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