Yannick Mermet
Senior Frontend Engineer
Frontend-first with fullstack ownership.
Grand Cayman (UTC-5, US Eastern hours) · Open to contract or Employer of Record (EOR) roles
About
I'm a Senior Frontend Engineer with 10+ years in software engineering, including 4 years building institutional crypto custody at io.finnet. Frontend-first with fullstack ownership and an AI-native workflow in Claude Code.
Since August 2022 I've been responsible for all frontend delivery across web and mobile at io.finnet: I led and architected the full platform redesign, built the 90+ component library as its sole maintainer, and shipped multi-chain tokenization and Solana signing end to end in React, Next.js, and TypeScript. Based in Grand Cayman. Bilingual English/French, certified Scrum Master.
10+
Years experience
4
Companies
EN/FR
Bilingual
Tool402
ETHOnline 2026, team of two. A Hedera Testnet marketplace prototype where AI agents discover APIs and pay per request via x402, with tokenized funding for tool builders and MetaMask wallet signing. Owned the Next.js 16, React, and Tailwind CSS frontend.
Skills
- Languages
- TypeScriptJavaScriptHTMLCSSSCSSSolidity
- Frontend
- ReactNext.js (App Router)React NativeExpoTailwind CSSshadcn/ui
- State Management
- TanStack Query (React Query)React Hook FormZod
- Automated Testing
- VitestReact Testing LibraryPlaywright (E2E)TDD
- Web3
- EthereumSolanaBitcoinTronWalletConnectsmart contractsMPC custodytokenization
- APIs and Cloud
- GraphQLRESTOpenAPINode.jsAWS (AppSync, Lambda, DynamoDB, S3)Serverless FrameworkPostgreSQLElasticsearchVercelDockerTerraform
- Tooling
- FigmaGitHub ActionsCI/CDTurbopackSentryClerkGitAgile
- AI Development
- Claude Code (agentic workflows)Claude Design (design system)
Let's Work Together
Open to contract or Employer of Record (EOR) roles. Grand Cayman (UTC-5, US Eastern hours).