Mar 10, 2026 • 5 min read
The death of the full-width container
Why modern web design is moving away from edge-to-edge layouts and embracing intentional negative space.
Available for work
Hey, I'm Juan
Sheinix 👋
Engineer. Creator. Builder in crypto, web3, and AI. I ship real products that solve real problems — and this is where I share the work, the ideas, and the journey. Argentine roots, New Zealand based.
What I'm doing right now
Last updated: Mar 15, 26
The GitGazette
AI-powered newsroom for open-source repos. Paste any GitHub URL and get satirical-but-informative coverage from five fictional columnists — drama, code reviews, shipping forecasts, and more.
Content Creation
Crypto, blockchain, and DeFi content in Spanish on YouTube for 70k+ subscribers. Breaking down complex web3 and AI topics so anyone can understand them.
Holdii
A programmable coordination layer for digital wealth. Set rules for when and how your crypto assets release — inheritance, vesting, milestones — all on-chain, no middlemen. Multi-chain across Ethereum, Base, Polygon, and more.
Selected Works
Products and tools I've built — shipping real things that solve real problems.
CRYPTOSOLIDITYDEFI
Holdii
A programmable coordination layer for digital wealth. Set rules for when and how your crypto assets release — inheritance, vesting, milestones — all on-chain, no middlemen. Multi-chain across Ethereum, Base, Polygon, and more.
LiveVisit →
AIOPEN SOURCENEXTJS
The GitGazette
AI-powered newsroom for open-source repos. Paste any GitHub URL and get satirical-but-informative coverage from five fictional columnists — drama, code reviews, shipping forecasts, and more.
LiveVisit →
⚡
[portfolio-rebalancer]
SOLIDITYDEFICHAINLINK
Portfolio Rebalancer
A modular, upgradeable smart contract system for creating per-user portfolio rebalancing vaults on EVM-compatible blockchains. Each user deploys their own vault with a custom basket of ERC-20 tokens and target allocations, auto-rebalancing via Uniswap V3 and Chainlink Automation.
In Development
Archived
CRYPTONEXTJSPOLYMARKET
SignalBoard
UMA resolution risk tracker for Polymarket. Identified high-risk markets before they disputed. A great learning experience building real-time data products — no longer maintained.
ArchivedVisit →
Experience
15+ years building software across mobile, blockchain, data, and web — from Oracle databases to multichain wallets.
Skills & Tech Stack
BlockchainSoliditySmart ContractsDeFi / Web3MPC WalletsHardhatAI / LLMsiOS / SwiftReact NativeTypeScriptObjective-CRustPL/SQLJavaNext.jsReactNode.jsREST APIsCI/CDETLOracle BPMSQL ServerUX/UI DesignSoftware ArchitectureContent CreationCommunity BuildingProduct
Digital Garden
A collection of semi-organized notes, sketches, and philosophical musings on the web and beyond.
Enter the grove🌳Feb 28, 2026 • 8 min read
Why we need more 'Cozy' interfaces
Exploring the intersection of developer tools aesthetics and human-centered design.
Feb 15, 2026 • 6 min read
Designing with intent vs. designing with trends
How to build design systems that age gracefully by focusing on principles over patterns.
Products & Links I Use
Tools and services I actually use and recommend. Some links are referral codes — full transparency.
👻💳🛡️🔒⚔️🔐🔑⚡🔶🦈🦁
Aave Wallet
DeFi lending & borrowing protocol wallet
RedotPay
Crypto-to-fiat card for everyday spending
Ledger Nano
Secure hardware wallet for cold storage
Trezor Safe3
Open-source hardware wallet
Cypherock X1
Shamir-based MPC hardware wallet
HashWallet
Biometric hardware wallet — code: SHEINIX2024
OneKey Classic
Affordable hardware wallet
Bitget
Crypto exchange with copy trading
Binance
Leading crypto exchange
SurfShark VPN
Privacy VPN — 30 days free
Brave Browser
Privacy-focused browser with ad blocking
Let's Stay in Touch
Always open to interesting conversations about crypto, AI, design systems, or just geeking out over good coffee.
