Mid & Sr. Systems Engineer

Mid & Sr. Systems Engineer

Chicago – Onsite

About The Role:

Join our Chicago-based Infrastructure team as a Mid- or Senior-Level Systems Engineer. You’ll design, build, and scale the systems that power our trading platform—tackling tough performance challenges and optimizing how software meets hardware. Expect to work across messaging, monitoring, and high-throughput systems alongside talented engineers in a fast-moving, collaborative environment. This role reports to the Head of Infrastructure.

What You’ll Do:

• Design, build, maintain high-throughput, low-latency systems software.
• Debug and resolve complex distributed systems issues.
• Scale and tune infrastructure for peak performance.
• Work autonomously on tough technical challenges with sound judgment on when to escalate.
• Collaborate with application and DevOps teams to deliver reliable trading infrastructure.
• Apply systems-level insight to guide architecture and design choices.

What We’re Looking For:

• Bachelor’s degree in Computer Science, Mathematics, Business, or related field (or equivalent experience)
• Senior: 4–5 years’ experience writing system-level code in C#, C++, or similar
• Mid: 1–3 years’ experience writing system-level code in C#, C++, or similar
• Strong grasp of OS internals (Windows or Linux) and networking fundamentals
• Experience with distributed, high-throughput systems
• Skilled at diagnosing and resolving complex technical issues
• Track record of problem-solving in fast-paced environments
• Hands-on mindset with the judgment to know when to collaborate
• Experience with kernel bypass, performance tuning, allocations, and GC highly valued
• Curiosity about how software interacts with hardware at a low level
• Excellent communication and teamwork skills
• Highly organized, detail-oriented, and proactive
• Must work onsite in our Chicago office

OOJ-1452G