About JR Alonso | Contra JR Alonso

JR Alonso

Web and Blockchain developer

Ready for work

JR is ready for their next project!

Madrid, Spain

Work Services About

Madrid, Spain

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.

Identity verifiedVetted for secure and trusted collaboration.

Featured on

Best Spanish-speaking freelance Solidity Engineers to hire in 2026 Best Next.js freelancers to hire in Community of Madrid 2026 Best OpenZeppelin freelancers to hire in 2026

Rate

$25 - $50/hr

Skills and tools

Solidity Engineer Software Engineer

Details

Madrid, Spain

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

Fluent in Spanish • Professional Working Proficiency in English

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JR Alonso

Web and Blockchain developer

Ready for work

JR is ready for their next project!

Madrid, Spain

Work Services About

Madrid, Spain

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.

Identity verifiedVetted for secure and trusted collaboration.

Featured on

Best Spanish-speaking freelance Solidity Engineers to hire in 2026 Best Next.js freelancers to hire in Community of Madrid 2026 Best OpenZeppelin freelancers to hire in 2026