Build, maintain, and test high-performance blockchain components for Injective’s Cosmos-SDK protocol, including orderbook, trade execution, order matching, and Layer-2 systems. Develop open-source Go clients and REST/WebSocket APIs for exchange users and programmatic traders. Candidates need strong Go experience, blockchain knowledge, computer science fundamentals, and familiarity with Geth or Erigon. Cosmos-SDK, Tendermint, Ethereum, Solidity, Layer-2, and financial markets experience are preferred.