Senior engineer — JS

Design and ship the $CSM token smart contracts and marketplace logic;

Build the web3 frontend: wallet connect, transactions, NFT viewing;

Integrate the in-game economy with on-chain assets via secure APIs;

Audit-prep: write Foundry/Hardhat tests with 90%+ coverage;

Maintain the Cosmical 2049 web frontend (Next.js, React, TypeScript);

Implement marketplace search, filtering and bidding flows;

Work with the security team on threat modeling and incident response;

Document SDKs and APIs for partner integrations;

4+ years TypeScript and 2+ years Solidity in production;

Shipped at least one mainnet contract handling real value;

Strong with ethers.js / viem / wagmi and EVM tooling;

Familiar with EIP standards (ERC-20, 721, 1155, 2981);

React / Next.js experience for the dApp side;

Understanding of attack vectors (reentrancy, oracle, MEV);

Bonus: experience with Layer 2s (Arbitrum, Base, Optimism);

English: B2+ written and spoken.