Senior Staff Systems Engineer, Rust Eng.

Sequen AI is leading the charge for building frontier ranking models for search and recommendations. They are seeking a Core Systems Engineer with a deep mastery of Rust to design, build, and optimize their underlying model serving infrastructure and real-time performance engines.

Responsibilities:

• Optimize Real-Time Infrastructure: Write high-performance, memory-safe, and concurrent production code in Rust. Optimize model serving infrastructure to achieve ultra-low inference latency under heavy concurrent request loads. Build low-latency data ingestion systems, microservices, and network protocols to process real-time behavioral streams
• Develop Core Architectural Tooling: Design and maintain robust, high-throughput backend APIs and SDKs. Implement customized abstractions, caching layers, and memory management profiles to maximize hardware efficiency. Migrate data-heavy bottlenecks from higher-overhead languages into highly optimized Rust components
• Ensure Reliability and Scale: Own the end-to-end lifecycle of core backend infrastructure components. Debug complex distributed system deadlocks, race conditions, and production bottlenecks across cloud environments. Establish rigorous performance benchmarking, regression testing, and real-time system monitoring
• Collaborate on Product Evolution: Partner directly with Applied Scientists to translate recent neural network and ranking model breakthroughs into highly scalable runtime realities. Define best practices for building secure, scalable, and deterministic system architectures across our entire engineering organization