Software Engineer | $200k+

Feldspar & Flint LLC is a Recruiting & Staffing firm that specializes in operational strategy across core business functions.

Were seeking a Backend Systems Engineer with production Rust experience to build the infrastructure powering a real-time trading platform in New York City. This hands-on opportunity offers direct ownership of high-performance trading, risk, and settlement systems.

Responsibilities

• Design and develop high-performance backend infrastructure using Rust to support real-time trading operations.
• Build and maintain risk management and liquidation engines that protect trading operations and improve capital efficiency.
• Engineer blockchain state machines supporting trading execution, settlement, and risk management.
• Develop distributed services that maintain consistent state across asynchronous processes using consensus and coordination mechanisms.
• Build systems that process live market data and coordinate time-sensitive activities across multiple trading venues.
• Design and optimize REST and WebSocket APIs to deliver millisecond-level response times for trading applications.
• Develop concurrent, asynchronous services using Rust and Tokio, emphasizing throughput, reliability, and performance.
• Identify performance bottlenecks, optimize backend architecture, and contribute directly to the evolution of trading infrastructure.

Qualifications

• Production experience developing backend applications in Rust, with strong systems-level programming expertise.
• Demonstrated experience building real-time, high-throughput backend services, including asynchronous programming, concurrency, and performance optimization.
• Genuine interest in trading and financial markets, demonstrated through professional experience, technical projects, or independent market involvement.
• Experience in startup environments or similarly hands-on engineering teams, ideally working on performance-sensitive applications.
• Familiarity with distributed systems, REST and WebSocket APIs, and relational, time-series, or key-value databases.
• Independent engineering projects, particularly in Rust or C, with GitHub contributions or other demonstrable examples of technical proficiency.