Sr Software Engineer (low latency)

Geval6 is seeking a Senior Software Engineer who concentrates on low-latency systems and thrives in a hybrid Chicago environment. This contract role centers on delivering secure, scalable, and reliable technology to support global risk management, with minimal mentoring required. The team values disciplined architecture, performance tuning, and practical, hands-on design and implementation.

Below is a detailed view of responsibilities, qualifications, and the surrounding context for this opportunity.

Responsibilities

• Prioritize architecture and solution efficiency to optimize design and delivery.
• Balance performance, capacity, and reliability with core system functionality.
• Identify opportunities to optimize code and improve overall efficiency.
• Contribute to code reviews and support environment builds, release notes, and build notices.
• Review code to proactively identify defects, trace their sources, and aid in troubleshooting various issues.
• Develop optimized application modules and unit tests with minimal guidance.
• Understand low-level designs and how to integrate them into the broader application.
• Utilize design tools to regularly share and discuss design ideas for large systems.
• Comfortably use low-level inspection tools such as packet capture and hardware counters.
• Apply knowledge of modern multi-processor architectures to tune for high throughput and low latency.
• Employ established patterns to advance best practices and drive process improvements.

Requirements

• Ability to assess algorithmic and data-structure characteristics under constraints.
• Proficiency in multi-threading, concurrent data structures, shared memory, asynchronous programming, JNI, NIO, and HashMap.
• Understanding of queue theory and various designs to enhance system performance.
• Experience with networking protocols such as UDP and TCP.
• Familiarity with redundancy and fault tolerance techniques.
• Preferred experience with EF_VI, JNI, and On-load Solar Flare extension APIs.
• Awareness of thread pinning, interrupts, core isolation, jitter, NUMA nodes, and TLB caches; added value if demonstrated.
• Familiarity with JVM internals and garbage collection tuning.
• Advanced knowledge of Linux kernel and OS internals.

Technologies

• Java
• JNI
• NIO
• EF_VI
• On-load Solar Flare extension APIs
• Solarflare/OpenOnload
• Linux
• UDP
• TCP
• Packet capture

Benefits

• 401(k)
• Dental insurance
• Health insurance

Description

This position engineers secure, scalable, and reliable technology solutions with minimal mentoring to advance the client in the global marketplace and address risk-management needs for customers worldwide.

Pay

$80.00 - $82.00 per hour

Application Question(s)

• How many years of experience do you have developing low-latency or high-performance Java applications on Linux?
• Do you have hands-on experience optimizing applications for low latency, including thread pinning, NUMA, CPU affinity, interrupt handling, or latency/jitter reduction?
• Have you worked with any low-latency networking technologies or frameworks such as Solarflare/OpenOnload, EF_VI, shared memory, or high-performance messaging systems?
• How many years of experience do you have with multithreading, concurrent programming, JNI, NIO, and TCP/UDP networking in Java applications?

Work Location

Hybrid remote in Chicago, IL 60606