Yannick Mermet

Senior Full Stack Engineer

Frontend-first, full-stack-capable, on-call-resistant.

Based in the Cayman Islands · Available for opportunities

About

I'm a senior engineer with 10+ years shipping production React and Next.js applications, including 4 years in fintech and Web3. I work across the full stack but I'm frontend-first: I care about interfaces that are fast, clear, and trustworthy.

For the past 2 years I've led frontend delivery on an institutional digital asset custody platform at io.finnet: design system, real-time transaction interfaces, tokenisation, and a React Native signing app. Based in the Cayman Islands. Bilingual English/French, certified Scrum Master.

Side Projects

TypeScriptNext.jsSolidityFoundryClaude AIBullMQSupabasePlaywright

Contract Guard: Autonomous Bug Bounty Hunter

24/7 automated smart contract vulnerability detection and PoC generation for Immunefi bug bounties. Monitors top programs, classifies vulnerabilities (V01–V13+), generates Foundry-based PoCs, verifies exploits on mainnet forks, and sends Telegram alerts. Fully autonomous.

View on GitHub

Technologies I work with

TypeScript

React

Next.js

Node.js

Tailwind CSS

SCSS

GraphQL

Apollo Client

TanStack Query

Zod

Vitest

Testing Library

Expo

Solidity

Ethereum

Solana

AWS

Docker

Terraform

Vercel

Cloudflare

Sentry

PostgreSQL

DynamoDB

Elasticsearch

Git

GitHub Actions

Let's Work Together

Open to senior engineering roles and contract engagements. Based in the Cayman Islands, available globally and async-first.

Get In Touch