JayΒ Welsh
Web3 Developer at Propy Inc.
Western Cape, South Africa
Summary
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Seniorπ
Top SchoolJay Welsh is a Web3 developer with 10 years of software engineering experience, specialising in Solidity development, auditing and on-chain optimisation, and building full-stack interfaces for Ethereum-based apps. Currently at Propy, he combines Solidity and TypeScript expertise with practical experience implementing Web3 standards and performant on-chain logic. He transitioned from traditional full-stack roles into focused blockchain work at seen.haus and VALR, bringing production-grade backend and frontend skills (React, Vue, Node) to decentralised systems. Self-taught since 2012, Jay prefers open-source freelance work and has a persistent, never-give-up mindset that drives meticulous audits and pragmatic optimisations.
10 years of coding experience
7 years of employment as a software developer
Did not go to university. Self-taught post-matric., Did not go to university. Self-taught post-matric. at The Internet
English, Afrikaans
Stackoverflow
496reputation
19kreached
32answers
13questions
Github Skills (162)
dependency-management10
python10
doh10
svg10
visx10
zksync10
doi10
python-packaging10
toast10
firefox10
api10
usedapp10
data-visualization10
walletconnect10
dependency-manager10
Programming languages (12)
Github contributions (5)
Propy/Propy.Web3Portal
Nov 2023 - Oct 2025
Contributions:564 PRs, 481 pushes, 28 branches in 2 years
JayWelsh/coronamap
Mar 2020 - Aug 2020
Regional Coronavirus Data Visualisations for South Africa
Contributions:15 commits, 14 pushes, 1 branch in 4 months
data-visualisationdata-visualizationdata-visualizations
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