Join Ephemera, Build the Future of Onchain Messaging

We are seeking an experienced Staff-level Smart Contracts Engineer to lead the design, development, and maintenance of mission-critical blockchain systems with a focus on tokenomics. You will own the end-to-end lifecycle of smart contracts - from architecture and implementation to audits, deployment, and upgrades.

What You’ll Be Working On

• Writing and deploying smart contracts that govern the economics of the XMTP protocol

• Working with the team to design novel incentive models to reward offchain node operators and collect messaging fees

• Design & Implement Tokenomics Contracts: Lead the development of complex token contracts (ERC-20, staking, governance, vesting, distribution, liquidity management) tailored to evolving protocol needs

• Upgradability & Governance: Architect upgradeable contracts (e.g., via OpenZeppelin proxy patterns) ensuring safe, controlled, and transparent change management

• Security & Audits: Champion security best practices, lead internal reviews, coordinate with third-party auditors, and implement continuous monitoring of deployed contracts

• Production-Grade Operations: Manage large-scale funds in production environments, ensuring availability, integrity, and protection of treasury and user assets

• Cross-Functional Leadership: Partner with economics, product, and legal teams to translate tokenomics know-how into practical, deployable smart contract systems

• Mentorship & Standards: Establish engineering best practices for smart contract development, mentor other engineers, and raise the bar for security, efficiency, and maintainability

Your Experience

• Minimum of 7+ years of professional experience as a software engineer, staff level

• Extensive experience designing, building, and maintaining cryptoeconomic systems

  • Architected and designed complex protocols onchain

  • Experience working with auditors to find vulnerabilities

  • Writing well-tested Solidity code

Qualifications

Technical Expertise

• 5+ years of software engineering experience, with at least 3 years focused on Solidity / EVM-based smart contracts

• Proven track record of deploying and maintaining production-grade contracts managing significant funds

• Deep familiarity with tokenomics mechanisms: staking, bonding curves, vesting, emissions schedules, treasury management

• Strong understanding of EVM internals, gas optimization, and advanced contract design patterns

• Hands-on experience with upgradable contracts, proxy patterns, and governance-controlled upgrade systems

Security Focus

• Prior experience working with formal verification, fuzzing, or static analysis tools

• Contributions to audits, incident response, or security-critical systems

Leadership

• Ability to balance long-term protocol sustainability with near-term delivery needs

Nice-to-Haves

• Experienced simulating economic systems using deterministic and/or stochastic modeling techniques

• Experience working in open source and communicating with the public

• Experience working as an auditor

About You

• You are passionate about decentralized technology and believe in an onchain future

• You love to win and are fueled by solving hard problems

• You are self-directed, see opportunities and are inspired by challenges and helping solve them

• You have a small team mindset and are focused on where you can have the greatest impact

• You love to learn, are not afraid of changing your opinion or being wrong

Benefits

• Competitive compensation package, Base + Equity

• Salary range between $235k–$275k base (depending on experience + location)

• Remote-first environment with semi-yearly gatherings to connect IRL

• Fully paid Medical, Dental, Vision insurance in the US

• Parental Leave

• IT Equipment and WFH setup

• Monthly Wellness and Lifestyle stipend

• Personal assistant

• Unlimited time off

Compensation Range: $235K - $275K