Senior Solidity Engineer

Chainlink Labs·Remote · Worldwide·Ethereum

About this role

Chainlink Labs is the primary development company behind the Chainlink Network, the industry-standard Web3 services platform that has enabled trillions of dollars in transaction value across DeFi, insurance, gaming, NFTs and other major industries. As a Senior Solidity Engineer you will design, build, and audit the smart contracts that power Chainlink's oracle network.

What you'll do

• Design and implement production-grade Solidity smart contracts for Chainlink's data feeds and oracle infrastructure
• Conduct internal security reviews and collaborate with external auditors on protocol-level code
• Optimise gas efficiency across existing and new contract deployments
• Write comprehensive unit, integration, and fuzz tests using Foundry and Hardhat
• Collaborate closely with protocol designers and researchers to translate specs into code
• Mentor junior engineers and participate in thorough code reviews
• Contribute to open-source Chainlink repositories and developer tooling

Tech stack

Application process

1. 1

   Submit your application with CV and any relevant GitHub/portfolio links

2. 2

   Async technical screen — a short take-home Solidity challenge (2–3 hours)

3. 3

   Technical interview with two senior engineers (60 min)

4. 4

   Final culture & values interview with engineering leadership (45 min)

5. 5

   Offer and onboarding — average time to offer is 2–3 weeks