Senior / Staff Software Engineer — Algorithmic Execution Platform

What You'll Do

• Design and harden the FIX acceptor gateway serving as the primary inbound order entry point for institutional clients, owning the full order lifecycle including order entry, fills, ACKs, rejects, and outbound sequencing
• Build and maintain production-grade feed handlers for exchange protocols (ITCH, OUCH, binary formats) across major U.S. exchanges and ATSs, replacing legacy market data dependencies with proprietary low-latency infrastructure
• Build and optimize the venue connectivity layer, owning latency profiling and hot-path analysis from order receipt through exchange acknowledgment
• Architect and implement real-time pre-trade risk checks with microsecond-level latency budgets, balancing correctness guarantees with performance requirements
• Contribute to platform infrastructure including configuration, command and control architecture, normalized internal message representation, and audit-trail logging systems

What You Need

• 7+ years of experience building high-performance, low-latency systems in C++ in production environments
• Deep knowledge of FIX protocol (4.2/4.4) and the full order lifecycle including entry, routing, execution, cancellation, and reporting
• Experience with exchange market data protocols (ITCH, OUCH, binary feed formats) and building production-grade feed handlers
• Strong understanding of low-latency architecture including kernel bypass, lock-free data structures, CPU affinity, memory layout, and hot-path profiling
• Experience with multicast messaging systems (Aeron, LBM, or equivalent publish/subscribe transport)
• Solid grasp of U.S. equity market structure including order types, Reg NMS, venue routing, lit and dark pools
• Comfortable working in Linux, including performance tuning at the OS level
• Bachelor's degree or higher in Computer Science, Engineering, Mathematics, or related STEM field

Nice to Have

• Experience building algorithmic execution or SOR infrastructure at a broker-dealer, prop firm, or exchange
• Familiarity with options or futures execution infrastructure
• Experience with pre-trade risk system design including firm-level and account-level controls
• Knowledge of CAT reporting requirements and how they shape system design
• Experience building platforms designed to service multiple asset classes from a shared execution layer
• Exposure to international markets and cross-region system design
• Proficiency in Python for internal tooling and test infrastructure
• Familiarity with containerization and Kubernetes-based deployment

Base salary $200,000–$350,000, plus competitive compensation packages including company equity, 401k matching, gender-neutral parental leave, and full medical, dental, and vision insurance. In-office benefits include lunch stipends, fully stocked kitchens, happy hours.