Senior Software Engineer – Algorithmic Execution Platform

Clear Street

. Design and harden the client-facing FIX acceptor serving as the primary inbound order entry point for institutional clients .

Posted 10/22/2026full-timeUnited StatesSenior💰 $200,000 - $350,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Expertise in building high-performance, low-latency systems using C++, with a strong focus on FIX protocol and exchange market data protocols. Proven ability to optimize venue connectivity and implement real-time risk checks within stringent latency requirements.

Highest-signal resume keywords

C++ DevelopmentFIX Protocol ExpertiseLow-Latency ArchitectureExchange Market Data ProtocolsLinux Performance Tuning

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C++FIX ProtocolLow-Latency SystemsFeed HandlersMulticast MessagingKernel BypassLock-Free Data StructuresHot-Path ProfilingOrder Lifecycle ManagementPerformance Tuning

Tools & Technologies

AeronLBMLinux

Industry Keywords

U.S. Equity Market StructureReg NMSOrder TypesVenue RoutingLit PoolsDark Pools

Tech Stack

Tools & technologies

LinuxC++

About the role

Key responsibilities & impact

Design and harden the client-facing 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
Build and maintain production-grade feed handlers for ITCH, OUCH, and binary exchange protocols across major U.S. exchanges and ATSs
Build and optimize the venue connectivity layer
Own latency profiling and hot-path analysis from order receipt through exchange acknowledgment
Architect and implement real-time pre-trade risk checks within microsecond-level latency budgets
Contribute to configuration and command-and-control architecture, normalized internal messaging, and audit-trail logging
Migrate algorithmic strategies from legacy infrastructure onto the new platform
Contribute to the broader roadmap, including research and backtesting, additional asset classes, and international market support

Requirements

What you’ll need

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

Benefits

Comp & perks

Company equity
401k matching
Gender neutral parental leave
Full medical, dental and vision insurance
Lunch stipends
Fully stocked kitchens
Happy hours
Great location
Amazing views