Senior Blockchain Engineer - Solidity

As a Senior Blockchain Engineer specializing in Solidity, you will be tasked with developing secure and efficient smart contracts for our Real-World Asset (RWA) protocol. This includes writing comprehensive tests, auditing, and optimizing smart contracts to enhance security. You'll also build client libraries for easy integration, collaborate with backend and product teams, and remain current with developments in EVM technologies and security practices.

To apply for the Senior Blockchain Engineer role, you should possess at least 3 years of experience in developing EVM-based smart contracts. Strong proficiency in Solidity, Hardhat, and Foundry is essential. Additionally, experience with DeFi projects, understanding of gas optimizations, and familiarity with ERC standards would be beneficial for this position.

In the Senior Blockchain Engineer role, you will work with a variety of technologies including Solidity for smart contract development, Hardhat and Foundry for testing, and libraries like ethers.js and web3.js. Familiarity with security practices such as gas optimizations and standards like EIP-3009 will also be crucial to your success in this position.

The Senior Blockchain Engineer plays a critical role in integrating DeFi functionalities into our protocol. By developing smart contracts for staking mechanisms, liquidity management, and DAO governance, you will help us enhance our platform's capabilities and user experience in the DeFi ecosystem.

In addition to core competencies in Solidity and smart contract development, having experience with bridges and Layer 2 scaling solutions, as well as knowledge of cross-chain communication and on-chain KYC mechanisms, will be seen as valuable assets for a Senior Blockchain Engineer at our company.

The smart contract development lifecycle includes requirement analysis, design, implementation, testing, and deployment. As a Senior Blockchain Engineer, it's crucial to not only write the contract in Solidity but also ensure thorough testing and optimization before deployment to prevent vulnerabilities.

Common security best practices include using well-audited libraries like OpenZeppelin, adhering to design principles such as minimizing external calls, implementing proper access control mechanisms, and ensuring that your contracts are gas-efficient to prevent front-running attacks.

I approach gas optimization by analyzing contract functions for efficiency, using fewer state variables, avoiding loops where appropriate, and employing optimized algorithms. Regularly reviewing EIP standards can also provide ideas for reducing gas costs.

I have extensive experience working on various DeFi projects focused on building staking mechanisms, liquidity pools, and governance DAOs. I understand the specific requirements and challenges associated with these projects, including compliance with financial regulations.

I prioritize documentation by using descriptive comments within the code, creating external documentation detailing functions and their usage, and maintaining examples of how to interact with the contracts. This not only aids team collaboration but also assists in future code audits.

Once, I encountered a reentrancy bug that was exploited during execution. I resolved it by implementing the Checks-Effects-Interactions pattern and using mutexes to prevent overlapping execution. Post-fix, I introduced additional tests to catch similar issues early.

I prefer using Hardhat and Foundry for testing due to their flexibility and comprehensive support for Solidity. They offer excellent debugging features and integration with testing frameworks like Mocha and Chai, allowing for robust test scenarios.

ERC standards define common rules and protocols for Ethereum token implementations, such as ERC-20 for fungible tokens and ERC-721 for non-fungible tokens. They are important because they ensure interoperability and compatibility across different platforms and applications in the Ethereum ecosystem.

Gasless transactions allow users to perform transactions without the need to hold Ether to pay for gas. This is typically implemented through EIP-3009, which enables relayers to cover the transaction costs on behalf of the user, enhancing user experience and accessibility.

I stay updated by following influential blockchain publications, participating in forums, attending conferences, and continuously taking online courses. Engaging with the community through GitHub and Discord also helps me remain informed about the latest trends and security vulnerabilities.