Mid/Senior Smart Contract Engineer jobs in United States
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LI.FI · 1 month ago

Mid/Senior Smart Contract Engineer

LI.FI is simplifying multi-chain DeFi for traditional financial institutions and fintechs by offering a unified API to access on-chain liquidity. They are seeking a mid-level Smart Contract Engineer to join their API Expansion Team, focusing on integrating new chains and writing smart contracts while ensuring security and optimal performance.

BlockchainFinanceFinancial ServicesFinTechInformation TechnologySoftware

Responsibilities

Contribute to development and configuration of our 1200+ production smart contracts, ensuring security and optimal (gas) performance
Collaborate with external auditors, resolve audit findings and file audit reports to ensure full audit traceability of our codebase
Create and improve scripts (typescript and bash) that help us to get our work done most efficiently
Deploy staging and production contracts to many chains simultaneously, ensuring contracts are verified
Create, review and sign multisig proposals in production environment
Maintain and improve our CI/CD pipeline on Github
Review and respond to bug bounty submissions
Write demo scripts that showcase how our contracts function and have to be interacted with
Help our customer support team to analyze failing transactions and provide easy-to-digest explanations for our partners and clients
Take an active role in our smart contract chapter (e.g. with knowledge sharing presentations)
Bring your own ideas and help us to grow every single day

Qualification

SolidityTypeScriptEVM networksYUL/AssemblyCI/CD pipelineCommunication skillsProblem-solvingTeam collaboration

Required

At least 5 years of software development experience with a focus on Solidity (at least 3, ideally 5 years) and solid experience in TypeScript (at least 3 years)
Proficiency in YUL/Assembly and experience deploying smart contracts to multiple EVM networks
Meticulous and quality-driven, you ensure high-quality outputs in all aspects of your work
Strong written and verbal communication skills for effective interaction within a cross-cultural team and with external stakeholders

Preferred

Experience working with/for a major DeFi protocol, especially a bridge or cross-chain protocol is a plus
Contributions to Ethereum Improvement Proposals (EIPs) or other public blockchain initiatives are a plus
A degree in computer science or a related field is a plus

Benefits

Annual team offsites (Thailand in 2023 and Vietnam in 2024 were a blast, Marrakech in March 2025 was blast-ier; let’s see what happens in 2026!)
30 days of PTO
Flexible remote days
Flexible working hours
Equity participation from day 1
Entitlement to work computer (choice of equipment)
An annual 1,000€ personal development budget once you have worked 6+ months (pro-rated the first year)
A one-time 1,000€ remote budget to use on coworking, office setup, etc.

Company

LI.FI

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LI.FI builds a multi-chain DeFi middleware for the application layer.

Funding

Current Stage
Growth Stage
Total Funding
$52M
Key Investors
1kx
2025-12-11Series A· $29M
2023-03-30Series A· $17.5M
2022-07-11Series Unknown· $5.5M

Leadership Team

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Philipp Zentner
CEO, Founder
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Max Klenk
Chief Technology Officer
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