Senior C++ Software Engineer

Phaxis; Chicago (IL); On-site; USD 150,000 - 210,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k) with company match

Unlimited PTO

Job summary

Phaxis is seeking an experienced C++ Engineer for a proprietary trading firm in Chicago. You will join a technology team building automated, scalable trading systems and ultra-low latency infrastructure supporting trading strategies and execution.

You will work closely with traders and engineers to optimize performance, translate trading ideas into production code, and push for continuous improvements in latency, throughput, and reliability.

Qualifications

• 5+ years in an options market-making or electronic trading firm.
• Advanced proficiency in modern C++.
• Strong knowledge of Linux and system-level programming.

Responsibilities

• Design, develop, and optimize low-latency C++ applications supporting electronic trading strategies.
• Partner with traders and engineers to turn ideas into production-ready systems.
• Analyze system performance to identify bottlenecks and prioritize improvements.
• Enhance interactions between applications and system components in a controlled environment.
• Migrate and rewrite complex Java applications into C++.
• Optimize production systems for latency, throughput, reliability, and scalability.
• Debug and profile performance-critical applications in a Linux environment.

Skills

C++

Linux

Data structures

Concurrency

Performance optimization

Tools

Profiling tools

Job description

A proprietary trading firm specializing in electronic options market making is seeking an experienced C++ Engineer to join its technology team. The firm takes a highly quantitative and technology-driven approach, building automated, scalable trading systems designed to provide liquidity across financial markets.

This role works closely with traders and engineers to develop and optimize the low-latency infrastructure supporting trading strategies and execution.

What You'll Do

A proprietary trading firm specializing in electronic options market making is seeking an experienced C++ Engineer to join its technology team. The firm takes a highly quantitative and technology-driven approach, building automated, scalable trading systems designed to provide liquidity across financial markets.

This role works closely with traders and engineers to develop and optimize the low-latency infrastructure supporting trading strategies and execution.

• Design, develop, and optimize low-latency C++ applications supporting electronic trading strategies.
• Partner directly with traders and engineers to turn trading ideas into reliable, production-ready systems.
• Analyze system performance and data to identify bottlenecks and prioritize improvements.
• Enhance interactions between applications and system components in a controlled and testable environment.
• Migrate and rewrite complex Java applications into C++.
• Optimize production systems for latency, throughput, reliability, and scalability.
• Debug and profile performance-critical applications in a Linux environment.

Qualifications

• 5+ years of experience within an options market-making or electronic trading firm.
• Advanced proficiency in modern C++.
• Strong understanding of data structures, algorithms, concurrency, and computer science fundamentals.
• Experience with debugging, profiling, and performance optimization.
• Strong knowledge of Linux and system-level programming.
• Ability to make sound technical decisions around system behaviors and configuration.
• Proven ability to translate trading and business requirements into scalable production code.

Why Join

• Work within a small, highly collaborative team with direct exposure to senior leadership.
• Take meaningful ownership of technology that directly impacts trading performance.
• Build and improve proprietary low-latency trading systems and quantitative infrastructure.
• Work closely with traders in an environment with fast feedback and development cycles.
• Join a Chicago-based team within one of the country\'s leading electronic trading markets.

Benefits

• Medical, dental, and vision insurance with employee premiums fully covered.
• 401(k) with a 4% company match.
• Unlimited PTO and sick leave.
• Complimentary lunch, coffee, drinks, and snacks.
• Commuter benefits.
• Regular team events and company outings.