Senior / Staff Platform Software Engineer

Clear Street is building the core AI platform for a copilot in its new AI-native trading experience. The role focuses on developing reliable, low-latency backend services and safe trading action infrastructure, while partnering with product and frontend teams to deliver AI-native user experiences.

Responsibilities:

• You will build the core AI platform that powers a copilot inside a new, AI-native trading experience
• You will develop a high-performance backend in Rust that supports streaming responses, low-latency tool execution, caching, and reliable orchestration of model + tools
• You will design robust APIs and runtime components for AI capabilities: authentication/authorization, rate limits, auditing, tracing, retries, and fallbacks
• You will build safe action infrastructure for trading workflows: deterministic order previews, confirmation flows, idempotent tool calls, and comprehensive audit logs
• You will partner with product and frontend to enable great AI-native UX patterns (streaming, citations/grounding, “why” explanations, reversible actions)
• You will develop a deep understanding of the business domain and help translate it into secure, resilient platform primitives

Requirements:

• At least Eight (8) years of experience and strong proficiency with any programming language
• Strong knowledge of systems programming fundamentals: concurrency, networking, performance profiling, reliability, and distributed systems patterns
• Experience designing and operating production APIs/services with strong observability, correctness guarantees, and security considerations
• Ability to work with stakeholders to define platform requirements, design the architecture, and deliver it end-to-end
• High degree of self-motivation and willingness to jump into unfamiliar areas to solve problems
• Strong Rust experience in production (Tokio/async, service design, performance tuning)
• Experience building platforms for AI/ML inference, tool execution, streaming, or retrieval/grounding systems
• Experience in trading systems (order lifecycle, execution, risk checks, auditability) or other mission-critical financial infrastructure
• Deep experience with trading across asset classes, margin types, etc
• Experience with Postgres performance and data modeling in high-throughput systems