Base is planning to bring a million developers and a billion users onchain. We need your help to make that happen. We are looking for a Senior Smart Contract Engineer to join the Base team and support the Smart Contract engineering discipline, enabling and accelerating the success of Base. In addition to direct protocol and smart contract work, you’ll be part of the team building and running the infrastructure, ensuring the systems that sustain the Base chain are low-cost, secure, and best-in-class.  What you'll do: * Architect and build secure smart contract protocols and backend services to connect Coinbase users with the crypto ecosystem * Drive standardization in crypto protocols by designing and defining interfaces  * Work closely with the Base leadership and product team to set our onchain strategy and roadmaps * Mentor and train other team members on smart contract engineering best practices What we look for in you: * 2+ years of hands-on Solidity development experience * 1+ years experience deploying smart contracts that have seen public use in Ethereum Mainnet or other EVMs * 3+ years experience with backend/client side development * Demonstrated ability to responsibly use generative AI tools and copilots (e.g., LibreChat, Gemini, Glean) in daily workflows, continuously learn as tools evolve, and apply human‑in‑the‑loop practices to deliver business‑ready outputs and drive measurable improvements in efficiency, cost, and quality * Deep understanding of smart contract best practices and current industry patterns  * Extensive experience with crypto (Ethereum, DeFi etc.) * Interest and passion for contributing to the crypto ecosystem * Interest and passion for building secure, robust, scalable infrastructure Nice to haves: * Experience with Geth/Reth * Experience with zero-knowledge technology P77365 Pay Transparency Notice: Base salary varies by location (see range below). Total compensation may also include equity and bonus eligibility, and benefits (medical, dental, vision, 401(k)).    Annual base salary range (excluding equity and bonus): $186,065—$218,900 USD * Application Limit: Candidates may submit a maximum of 3 applications within a 6-month period. * Equal Opportunity Employer: Coinbase is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or genetic information. Applicants with criminal histories will be considered consistent with applicable federal, state, and local laws. * US Applicants: View Employee Rights, Know Your Rights, and E-Verify Notice of Participation. * Accommodations: If you are an individual with a disability who needs a reasonable accommodation, email us your request and contact info at accommodations[at]coinbase.com. Need screen reading technology? Click here to download a free compatible screen reader and view the tutorial. * Data Privacy & Arbitration: By submitting your application, you agree to our Candidate Privacy Notice. US applicants: By submitting your application, you agree to Arbitration of Disputes. * AI Disclosure: Coinbase is piloting an AI tool based on machine learning technologies to conduct initial screening interviews to qualified applicants. The tool simulates realistic interview scenarios and engages in dynamic conversation.  Coinbase is also piloting an AI interview intelligence platform to transcribe and summarize interview notes, allowing our interviewers to fully focus on you as the candidate. Coinbase will not use AI to make decisions impacting employment.