Senior Software Engineer – Low Latency Trading / Core Java

Job Summary We are seeking a Senior Core Java Engineer with recent, hands-on experience developing low- or ultra-low-latency electronic trading systems . The ideal candidate will have a strong understanding of actual trading workflows and experience building performance-sensitive backend systems.

Location: Chicago, IL – Hybrid (2 days onsite required) Type: Long-term Contract

Preferred Background Candidates with experience in the following areas are highly preferred: Matching engines

Order books

Market data processing

Exchange connectivity

Order routing

Trading gateways

Other performance-sensitive backend trading systems

Experience within trading firms, banks, or exchanges

Required Skills & Experience Strong expertise in Core Java

Recent hands-on experience with low-latency or ultra-low-latency electronic trading

Strong understanding of market data, order books, and trading logic

Excellent knowledge of multithreading and concurrency

Experience with TCP/UDP networking

Strong Linux experience

Proven experience with production performance and latency troubleshooting

Experience developing performance-sensitive backend trading systems

Important Candidate Requirements Candidates must have actual low-latency trading development experience . Financial-services experience alone is not sufficient.