Multiplier.finance: web app and backend for a multi-chain DeFi lending protocol
I was Lead Web Developer at BlockDevs from 2019 to 2022 on Multiplier.finance, an AAVE-style lending protocol across chains: lending, wallet integration, staking, the Express APIs and PostgreSQL behind them, and the Vue 2 to Vue 3 migration.
Multiplier.finance is a multi-chain DeFi liquidity protocol - AAVE-style lending across chains. It was formerly called PawnHub. I was Lead Web Developer on it at BlockDevs, 2019-2022, owning everything outside the smart contracts: backend, web app, and the integration between them.
What I shipped
A multi-chain liquidity protocol, AAVE-style lending across chains. I developed the core features - lending, wallet integration, and staking - and built the Express APIs, auth and sessions, and the PostgreSQL schema and queries behind them, plus The Graph subgraphs and GraphQL queries for on-chain indexing.
The migration
I led the migration from Vue v2.x class-based syntax to Vue v3.x Composition API.
How I worked
I developed core features, maintained platform stability and resolved UI issues, and conducted code reviews while facilitating knowledge sharing among the team.
Stack
Node.js, Express, PostgreSQL, GraphQL, The Graph (subgraphs), Vue v2.x, Vue v3.x, Antd, Vuetify, TailwindCSS / UnoCSS, ESLint, SCSS, Figma, AdobeXD, WalletConnect, Web3.js, Ethers.js, Vue-i18n. Wallet integration: MetaMask, TrustWallet, Safepal, Solflare, Onto. Utilities: bignumber.js, cleave.js, dayjs, iconify.