Blockchain Engineer
Designs and implements smart contracts and on-chain integrations, working with backend and product teams to ship secure, gas-efficient Web3 and RWA systems — including tests, deployment scripts, security review, and transaction monitoring. Core stack: Solidity, Hardhat/Foundry, EVM/L2s, ethers.js, Node.js, PostgreSQL.
- Compensation
- Not disclosed
- Location
- Zug
- Work setup
- Remote
- Seniority
- Not specified
- Employment
- Contract
- Experience
- 3+ years
- Category
- Blockchain
- Posted
Skills
Must have
- 3+ years of software engineering experience
- Strong Solidity or equivalent smart contract experience
- Understanding of EVM fundamentals and common patterns
- Experience with Hardhat / Foundry (or similar)
- Ability to reason about security and edge cases
- Comfort collaborating with backend and product teams
Nice to have
- Audit experience or formal verification exposure
- L2 networks (Polygon, Arbitrum, Optimism)
- ethers.js / web3.js integrations
- RWA, DeFi, or fintech product experience
Full description
The role
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.
What you'll do
- Design and implement smart contracts
- Integrate on-chain systems with backend and frontend services
- Write tests, deployment scripts, and upgrade paths
- Review contract security and operational risks
- Support indexing, events, and transaction monitoring
- Collaborate on token, custody, and market flows
What we're looking for
Must-have experience and skills for this role.
- 3+ years of software engineering experience
- Strong Solidity or equivalent smart contract experience
- Understanding of EVM fundamentals and common patterns
- Experience with Hardhat / Foundry (or similar)
- Ability to reason about security and edge cases
- Comfort collaborating with backend and product teams
Nice to have
- Audit experience or formal verification exposure
- L2 networks (Polygon, Arbitrum, Optimism)
- ethers.js / web3.js integrations
- RWA, DeFi, or fintech product experience
Tech stack
Solidity
Hardhat / Foundry
Ethereum · L2s
ethers.js
Node.js
PostgreSQL
Why join
- Work on modern Web3, RWA, and digital products
- High ownership and visible product impact
- Close collaboration with engineering, product, and design
- Fast-paced environment with real production systems
- Remote-friendly across global time zones
Hiring process
- Application review
- Technical interview
- Final discussion
How to apply
We review every relevant profile. Keep it concise and concrete.
Resume or LinkedIn
GitHub profile or portfolio (preferred)
Examples of relevant work you're proud of