About the Role
<h2>The role</h2><p>We are hiring a Blockchain Engineer to design and implement smart contracts and chain integrations. You will work closely with backend and product teams to ship secure, production-ready on-chain systems. This is a hands-on role focused on correctness, gas efficiency, and operational safety.</p><h2>What you'll do</h2><ul><li>Design and implement smart contracts</li><li>Integrate on-chain systems with backend and frontend services</li><li>Write tests, deployment scripts, and upgrade paths</li><li>Review contract security and operational risks</li><li>Support indexing, events, and transaction monitoring</li><li>Collaborate on token, custody, and market flows</li></ul><h2>What we're looking for</h2><p>Must-have experience and skills for this role.</p><ul><li>3+ years of software engineering experience</li><li>Strong Solidity or equivalent smart contract experience</li><li>Understanding of EVM fundamentals and common patterns</li><li>Experience with Hardhat / Foundry (or similar)</li><li>Ability to reason about security and edge cases</li><li>Comfort collaborating with backend and product teams</li></ul><h2>Nice to have</h2><ul><li>Audit experience or formal verification exposure</li><li>L2 networks (Polygon, Arbitrum, Optimism)</li><li>ethers.js / web3.js integrations</li><li>RWA, DeFi, or fintech product experience</li></ul><h2>Tech stack</h2><ul><li>Solidity</li><li>Hardhat / Foundry</li><li>Ethereum · L2s</li><li>ethers.js</li><li>Node.js</li><li>PostgreSQL</li></ul><h2>Why join</h2><ul><li>Work on modern Web3, RWA, and digital products</li><li>High ownership and visible product impact</li><li>Close collaboration with engineering, product, and design</li><li>Fast-paced environment with real production systems</li><li>Remote-friendly across global time zones</li></ul><h2>Hiring process</h2><ul><li>Application review</li><li>Technical interview</li><li>Final discussion</li></ul><p>Find more <a href="https://www.arbeitnow.ch/english-speaking-jobs">English Speaking Jobs in Switzerland</a> on Arbeitnow</a>