backend developer in Web3

Innowise is a professional software development company that has implemented more than 1,600 cases for clients worldwide.

• Develop Solidity smart contracts;
• Customize and extend ERC-20, ERC-721, ERC-1155, and EIP-712 standards;
• Use Hardhat and/or Foundry for deployment scripting, environment configuration, and testing;
• Use OpenZeppelin Contracts with secure inheritance, customization, and proven design patterns;
• Implement proxy patterns such as Transparent Proxy and UUPS;
• Mitigate common smart contract vulnerabilities;
• Write unit tests and use static analysis tools such as Slither and Solhint;
• Deploy contracts to testnets and mainnets;
• Work with RPC providers such as Alchemy, Infura, and similar services;
• Optimize gas usage through storage layout optimization, variable packing, calldata versus memory usage, and elimination of redundant operations;
• Integrate smart contracts with backend or frontend applications using ethers.js, viem, web3.js, or similar libraries.

• 2–4 Years of commercial experience in Solidity smart contract development;
• Strong knowledge and practical application of ERC-20, ERC-721, ERC-1155, and EIP-712;
• Experience with Hardhat and/or Foundry;
• Hands-on experience with OpenZeppelin Contracts;
• Understanding of Transparent Proxy and UUPS patterns;
• Knowledge of reentrancy, access control issues, front-running, integer overflow/underflow, and mitigation techniques;
• Experience writing smart contract unit tests;
• Basic experience with static analysis tools such as Slither and Solhint;
• Experience deploying contracts to testnets and mainnets;
• Understanding of gas optimization techniques;
• Basic experience with ethers.js, viem, web3.js, or similar libraries;
• English proficiency at B2 level or higher, including technical documentation and communication within an engineering team;
• Nice to have: experience with DeFi protocols, staking mechanisms and tokenomics models, on-chain randomness solutions, oracle solutions, RWA tokenization, ERC-3643, DAO governance, fuzz testing, smart contract audits and security reviews, Node.js, TypeScript.

• Flexible work schedule;
• Experience working with clients all over the world;
• Financial assistance;
• Medical insurance.