kwaji is CTO of Chubbicorns, audits smart contracts, and trades the markets on his own time. He was the smart contract engineer and built the MVP for Shibuya, and contributed to DefiLlama.
CTO
Jarren built the sales bot for Chubbicorns’ original team. When the original artists formed a new team, he joined them as CTO and facilitated and managed the transition of the project’s smart contracts.
He is still Chubbicorns’ go-to person for engineering and growth, including its 11B+ impressions on GIPHY.
Crypto payment rails
Jarren added crypto payment rails to WannaText, the creator monetization platform he builds and runs as its sole engineer.
Built for the Sui Foundation
Jarren built Walrus Photo Booth for the Sui Foundation on Walrus, the decentralized storage network on Sui. It debuted at one of the Sui Foundation’s official events at ETHDenver 2025.
Security review
Jarren has audited smart contracts for projects including 24/7 Comics and The Ninja Kingdom by Kyosei.
Instant mint-outs
Jarren helped music entertainment company CaliStar launch its NFTs, which minted out instantly. Weaxels, another launch he helped with, also minted out instantly on Base L2.
NFT Wiki and Goblin Translator
Jarren and John built NFT Wiki, where people can create custom landing pages. They also created Goblin Translator.
SO-COL and Jebus
SO-COL (IreneDAO) hired Jarren to build out its website. He also built a dive bar concept landing page for Jebus’s meme.
Smart contract engineer
Jarren was Shibuya’s smart contract engineer and led the team, including two engineers, to Shibuya’s April 2025 MVP launch.
He is also credited as a developer on White Rabbit, a 2025 Webby nominee for Best Community Engagement. The Shibuya project also won a 2025 Emmy for innovation in emerging media programming.
Open source DeFi analytics
Jarren’s merged PRs to DefiLlama’s Next.js app cover table sorting, filter handling, mobile navigation, and accessibility fixes.
Solana Mobile community web app
Jarren launched checkphone, a web app for the Solana Mobile community. It captured 100k views in its first month after launch, and even more Twitter impressions.
He’s active in the markets himself, where tastes and trends get tested with real money. His onchain activity is ridiculous, and so is his GitHub activity.
Schedule 30 minutes for a walkthrough of the smart contract, product, and market work that make him a fit for your crypto team.
Or write directly: sanjose.jarren@gmail.com