JR Alonso

Web and Blockchain developer

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Madrid, Spain

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Meet JR

Web and web3 Developer. In blockchain communities since the end of 2021. Solidity and React developer, contributor to some web3 projects. Former Java developer.

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Best Spanish-speaking freelance Solidity Engineers to hire in 2025Best Next.js freelancers to hire in Community of Madrid 2025Best OpenZeppelin freelancers to hire in 2025
Rate

$25 - $50/hr

Skills and tools
Solidity EngineerSoftware EngineerReactSolidityNext.jsOpenZeppelinHardhatTailwind CSS
Details

Madrid, Spain

(GMT-5) Eastern Standard Time (EST), ±2 hours

Fluent in Spanish • Professional Working Proficiency in English