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Senior Smart Contract Engineer

Building a permissionless shared security primitive for crypto infrastructure networks, focusing on restaking implementation.
London, UKParis, FranceRome, Metropolitan City of Rome Capital, Italy
Backend
Senior Software Engineer
Remote
5+ years of experience
Blockchain · Cybersecurity · Finance
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Description For Senior Smart Contract Engineer

Symbiotic is seeking a Senior Smart Contract Engineer to join their mission of building a permissionless shared security primitive for crypto infrastructure networks. As a backed by Paradigm and CyberFund, Symbiotic is focused on empowering network builders to customize their restaking implementation while minimizing risks.

The role involves working at the cutting edge of blockchain technology, specifically focusing on smart contract development and security. You'll be responsible for developing and maintaining core contracts, extensions, and middleware SDK, while working closely with protocol engineers across L1 and L2 chains. The position requires expertise in Solidity, deep understanding of EVM internals, and strong knowledge of DeFi concepts.

The ideal candidate will bring strong technical expertise in blockchain technology, particularly in areas such as Ethereum architecture, consensus mechanisms, and cryptography. You'll be working with modern tools like Foundry and Hardhat, and contributing to both on-chain and off-chain components of the system.

This is an excellent opportunity for a senior engineer passionate about blockchain infrastructure to join a tight-knit team of experienced professionals at the forefront of crypto infrastructure. The role offers the flexibility of remote work across multiple locations in Europe and the USA, allowing you to contribute to cutting-edge blockchain technology while working with a team that values technical excellence and innovation.

Last updated 5 days ago

Responsibilities For Senior Smart Contract Engineer

  • Work on blockchain protocols and smart contracts development for EVM-based systems
  • Write, optimize, and audit smart contracts in Solidity
  • Build and experiment with staking, DeFi, and protocol-level primitives
  • Use Foundry and Hardhat for development, testing, and deployment
  • Conduct and support security audits
  • Collaborate with protocol engineers for L1 and L2 chain integrations
  • Work with web3 libraries for off-chain contract interactions
  • Contribute to tooling and scripting in Python and TypeScript

Requirements For Senior Smart Contract Engineer

Python
TypeScript
JavaScript
  • Strong understanding of Ethereum L1/L2 architecture and PoS mechanisms
  • Familiar with blockchain primitives including consensus algorithms and cryptography
  • Deep knowledge of EVM internals
  • Expert in Solidity
  • Solid grasp of DeFi concepts
  • Proficient with Foundry, Hardhat, and web3 libraries
  • Strong security mindset
  • Practical coding experience in Python and JavaScript/TypeScript

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