@sv3n

Sven Esser

@sv3nJoined October 2026

Full-stack developer | Rust, Node.js, React | Lead dev at DexMarketCap

About

Hi, I’m Sven (Sv3n), a freelance full-stack developer with 7 years of experience. I write about Rust, blockchain and DeFi data, Ethereum tooling and building real-world apps with Node.js, React and Flutter. I’m the lead developer at DexMarketCap, a DEX analytics platform. Portfolio: sv3n.dev | GitHub: github.com/Sv3nskie

Available for

Freelance work, blockchain and DeFi development, full-stack web and mobile projects, and technical writing.

Sven Esser's blogs

Sv3nsv3n.hashnode.dev2 posts

Two Ethereum Scam Schemes Exposed

Two Ethereum Scam Schemes Exposed I build DexMarketCap, a DEX analytics tool with a wallet tracker. The part that matters for this story is how the PnL works: instead of computing a wallet's profit wh

19h ago · 10 min readsv3n.hashnode.dev

Build an Ethereum Wallet PnL Tracker in Node.js (20 minutes, no dependencies)

Want to know whether a wallet is actually profitable? Most explorers show balances, but not profit and loss per token. In this tutorial you'll build a small Node.js script that takes any Ethereum wall

21d ago · 5 min readsv3n.hashnode.dev

Sven Esser

About

Available for

Sven Esser's blogs

Two Ethereum Scam Schemes Exposed

Build an Ethereum Wallet PnL Tracker in Node.js (20 minutes, no dependencies)

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Sven Esser

About

Available for

Sven Esser's blogs

Two Ethereum Scam Schemes Exposed

Build an Ethereum Wallet PnL Tracker in Node.js (20 minutes, no dependencies)