Starkflow is seeking a Rust Proof Systems Integration Engineer with 5+ years of backend systems experience (C#, C++, Go, Java) and 1-2 years of hands-on Rust experience, including exposure to Zero Knowledge technologies (ZK-rollup, zkVM, and bridge). The role involves integrating proof systems in Rust, enhancing existing integrations (adding CUDA support, multi-machine proof generation orchestration), and writing clean, efficient, and testable code. Responsibilities include working on backend systems (networking, infrastructure, node software, client software) and contributing to protocol design.