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Senior C++ Software Engineer

Job

Fionics

Wood Dale, IL (In Person)

Full-Time

Posted 4 days ago (Updated 1 day ago) • Actively hiring

Expires 6/12/2026

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Job Description

Senior C++ Software Engineer at Fionics Senior C++ Software Engineer at Fionics in Wood Dale, Illinois Posted in about 5 hours ago.
Type:
full-time
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. You 5+ years at an options market making firm Strong modern C++ and system-level Linux programming Deep CS fundamentals - data structures, algorithms, concurrency Strong debugging, profiling, and performance-tuning skills Why Here Direct access to founders from day one Proprietary low-latency systems built in-house Real P&L impact within your first year Chicago-based, strong trading community All applications confidential

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