José Mazzara
VP Of Engineering at Decentraland
Milan, Lombardy, Argentina
Summary
🤩
Rockstar🎓
Top SchoolJosé Mazzara is a product-oriented VP of Engineering with 12 years of experience leading teams and shipping full-stack and blockchain-enabled products from Milan. He rose through engineering and leadership roles at Decentraland—now serving as VP after managing engineering and previously leading blockchain efforts—bridging smart contract logic, backend systems, and front-end marketplaces. José is an active open-source contributor with practical contributions to high-profile projects like web3.js, Matic Network's PoS bridge, and Decentraland’s NFT marketplace, demonstrating deep familiarity with Ethereum tooling and token transfer semantics. His background spans startup CTO duties to large decentralized product infrastructure, giving him both strategic vision and hands-on coding chops. Colleagues describe him as entrepreneurial and detail-focused, often diving into refactors, event handling, and CI improvements that reduce friction across teams. He holds a Bachelor’s in Computer Analysis from the University of Buenos Aires and combines engineering rigor with a knack for shipping user-focused solutions.
12 years of coding experience
6 years of employment as a software developer
Bachelor’s Degree in Computer Analysis, Bachelor’s Degree in Computer Analysis at University of Buenos Aires
Spanish, English
Stackoverflow
430reputation
16kreached
13answers
3questions
Github Skills (24)
javascript10
solidity10
typescript10
marketplace10
api10
web3js10
nft10
ethereum10
typescript-types10
blockchain10
smart-contracts10
typescripts10
cicd9
react9
gitlab8
Programming languages (15)
Github contributions (5)
decentraland/marketplace
Feb 2020 - May 2022
🏛️ Decentraland's NFT Marketplace
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:47 reviews, 47 commits, 62 PRs in 2 years 3 months
Contributions summary:José contributed to both the front-end and back-end aspects of the marketplace. They fixed issues related to ownership checks within the transfer page, updated the collections data, and added new collections, indicating a focus on improving the NFT marketplace functionality. Furthermore, the user worked on setting up a GitLab CI pipeline and bumping dcl-dapps/dcl-ui, demonstrating involvement in the project's infrastructure and dependencies. These changes indicate involvement across multiple parts of the system.
marketplacereactdappethereumblockchain
maticnetwork/pos-portal
Oct 2020 - Feb 2021
Smart contracts that powers the PoS (proof-of-stake) based bridge mechanism for Matic Network
Role in this project:Backend Developer
Backend DeveloperContributions:6 commits, 3 PRs in 3 months
Contributions summary:José primarily contributed to the smart contracts within the repository, focusing on the logic for exiting tokens from the proof-of-stake bridge. Their work involved modifying predicate contracts for ERC721, ERC1155, ERC20, and Ether tokens. Additionally, the user made changes related to testing the withdrawal process, indicating a focus on ensuring the correct functionality and security of the bridge's core features.
mechanismposmatic-networkstakeethereum
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