Backend Engineer at Karma3Labs builds scalable backend systems processing large data streams, developing secure smart contracts, optimizing storage, and creating indexing services. Core technologies include Solidity, Go, JavaScript/TypeScript, Python, and cloud infrastructure.
You build scalable backend systems that process, store, and serve large data streams. You develop secure smart contracts, authenticate on-chain and off-chain data, optimize storage, create indexing services and distributed recommendation algorithms, and expose results through external APIs.
Responsibilities
Write extensible and secure smart contracts
Track the latest EIPs
Extract and cryptographically authenticate on-chain and off-chain data streams
Transform data streams into optimized storage solutions
Develop scalable indexing services for compute clusters
Implement distributed algorithms for recommendation and reputation scores
Develop external APIs for third-party applications
Requirements
2+ years of experience in backend systems
Experience with smart contract development
Solidity as a primary language
Proficiency in two or more of Go, JavaScript/TypeScript, and Python
Experience with REST APIs or RPCs
Experience with AWS or Google Cloud infrastructure services