Principal Engineer (Trading Systems)

Principal Engineer (Trading Systems)
Chicago or Remote
We are looking for a highly skilled and experienced Principal Engineer to join our Trading Services
team. In this pivotal role, you will be responsible for designing, evolving, and optimizing our core
trading infrastructure. You will help scale and enhance our highly scalable, low-latency trading system,
ensuring that it meets the highest standards of performance, scalability, and reliability. Your work will
directly impact our ability to support rapid growth in the retail futures trading space.

In this role, you will:
• Design, develop, and optimize our Scala based trading services for high-volume, low-latency,
24x7 environments.
• Lead architectural strategy for future-state scalability and performance optimization.
• Mentor and guide junior engineers, promoting best practices and technical excellence.
• Collaborate cross-functionally with product, engineering, operations, and security teams to
translate business requirements into robust and secure technical solutions.
• Optimize system performance, with focus on JVM tuning for Scala/Akka based distributed
system.
• Enhance monitoring and observability of services for real-time trade execution and
operational transparency.
• Ensure compliance with security policies, regulatory standards, and industry best practices.
Key Position Requirements:
• Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent
experience).
• Extensive experience with high-performance, high-concurrency distributed trading systems.
• Proven expertise in JVM and performance tuning for high-performance environments.
• Experience supporting 24/7 production systems, ideally in trading environments.
• Deep knowledge of networking, and protocols (HTTP/HTTPS, WebSockets, DNS, TCP/IP).
• Experience with CI/CD tools (Jenkins, GitHub Actions).
• Strong troubleshooting and debugging skills in high-pressure, real-time conditions.
• Excellent communication skills, capable of clearly articulating technical concepts to diverse
stakeholders.
• Experience in Java/Scala/Rust/C++ or functional programming languages within
exchange/trading environments.
Preferred Qualifications:
• Experience in low-latency, lock-free development and design.
• Strong experience with multithreading and concurrency in high-performance environments.

• Familiarity with binary or custom trading protocols.
• Strong knowledge of messaging frameworks (Kafka, RabbitMQ) and network protocols (UDP,
TCP).
• Hands-on experience implementing HTTP/WebSockets, REST APIs, OAuth, gRPC, and Redis
APIs.
• Deep understanding of order handling/matching engines.
• Extensive experience with FIX or other market data/order-entry protocols.
• Practical hands-on experience with cloud-native technologies (Kubernetes and Docker).
• Solid grasp of network communications,