SlipstreamJobs tracks this role from the company's public career site. Apply directly on the employer's site.
Salary: USD 200,000 - 350,000 / annual
Clear Street is modernizing the brokerage ecosystem with a cloud-native clearing and custody platform supporting billions in daily trading volume. The Algorithmic Execution Services team is building the next generation of electronic trading infrastructure from the ground up — replacing fragmented, vendor-dependent solutions with a single, modular, low-latency platform.
This is a core infrastructure role on a small, focused team. You will be one of the foundational engineers shaping and building the new execution platform, a C++-based system with client-facing FIX connectivity, institutional-grade risk controls, and deep integration across U.S. exchanges and dark venues.
Key responsibilities include:
• Client-facing FIX gateway — design and harden the FIX acceptor serving as the primary inbound order entry point for institutional clients; own the full order lifecycle including order entry, fills, ACKs, rejects, and outbound sequencing
• Market data infrastructure — build and maintain production-grade feed handlers for exchange protocols (ITCH, OUCH, binary) across major U.S. exchanges and ATSs, replacing legacy market data dependencies with proprietary, low-latency infrastructure
• Execution and venue connectivity — build and optimize the venue connectivity layer; own latency profiling and hot-path analysis from order receipt through exchange acknowledgment
• Pre-trade risk controls — architect and implement real-time risk checks with clear understanding of critical-path placement; balance correctness guarantees with microsecond-level latency budgets
• Platform infrastructure — contribute to configuration and command & control architecture, normalized internal message representation, and audit-trail logging systems
• Algorithmic strategy migration — help move existing algorithmic strategies off legacy infrastructure onto the new platform, component by component
As the core platform stabilizes over 12–24 months, you will have opportunities to contribute to a broader roadmap including research and backtesting environments, expansion into options, futures, FX, and crypto, and support for international markets including Europe and Canada.
The role is hybrid (4 days in office) based in New York, NY or Lisle, IL.
**Requirements:**
• 7+ years of experience building high-performance, low-latency systems in C++ in a production environment
• Deep knowledge of FIX protocol (4.2/4.4) and the full order lifecycle — 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 — kernel bypass, lock-free data structures, CPU affinity, memory layout, and hot-path profiling
• Experience with multicast messaging (Aeron, LBM, or equivalent publish/subscribe transport)
• Solid grasp of U.S. equity market structure: 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 a related STEM field
**Nice to haves:**
• 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 — 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
• Experience with fractionalization and/or internalization
• Proficiency in Python for internal tooling and test infrastructure
• Familiarity with containerization and Kubernetes-based deployment
