Senior C++ Software Engineer

Fionics

Chicago (IL)

On-site

USD 140,000 - 210,000

Full time

3 days ago

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Job summary

Fionics in Chicago, IL is seeking a Senior C++ Software Developer to design and optimize low-latency systems powering automated options market making. You will work directly with traders and engineers to move ideas from concept to production.

The role requires 5+ years in an options market making firm, strong modern C++ and Linux programming, and deep CS fundamentals. Expect hands-on debugging, profiling, and performance tuning in a fast-paced environment.

Qualifications

5+ years at an options market making firm.
Strong modern C++ and Linux system programming.
Solid CS fundamentals — data structures, algorithms, concurrency.
Excellent debugging, profiling, and performance tuning.

Responsibilities

Design and optimize low-latency C++ systems for automated options market making.
Collaborate with traders and engineers to move ideas from concept to production.
Rewrite legacy Java into C++ and tune for throughput.
Perform diagnostic analysis to maximize system throughput.

Skills

C++

Linux

Concurrency

Performance tuning

Debugging

Profiling

Tools

Low-latency systems

Profiling tools

Java migration

Job description

Senior C++ Software Developer — Options Market Making

Chicago, IL | Full-time | On-site

Hiring for a fast-growing electronic options market maker in Chicago. Small team, flat structure, real ownership from day one.

The Role

Design and optimize low-latency C++ systems powering automated options market making. Work directly with traders and engineers to take ideas from concept to production. Includes rewriting legacy Java into C++, diagnostic analysis, and tuning for maximum throughput.

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