Senior Software Engineer – Low Latency

Job Title: Senior Software Engineer Low Latency

Location: Chicago IL (Primary) / New York NY
Work Schedule: Hybrid 2 days onsite per week
Duration: 6-Month Contract

We are seeking a Senior Software Engineer Low Latency to engineer secure scalable and reliable technology solutions that support critical business operations and risk management initiatives. This role requires minimal supervision and focuses on building high-performance low-latency systems while driving architecture efficiency code optimization and system reliability.

• Design and develop secure scalable and reliable technology solutions.
• Focus on architecture and solution efficiencies while balancing performance capacity reliability and core system functionality.
• Identify opportunities for code optimization and performance improvements.
• Participate in code reviews and assist with environment builds deployments release notes and build notices.
• Proactively identify and mitigate code defects and troubleshoot application issues.
• Develop optimized application modules and unit tests with minimal guidance.
• Interpret low-level designs and integrate them into larger application architectures.
• Communicate and share design ideas using system design tools.
• Utilize low-level diagnostic tools such as packet captures and hardware performance counters.
• Tune applications and systems for high throughput and low latency using modern multi-processor architecture concepts.
• Apply software design patterns and contribute to engineering best practices and process improvements.

• Strong understanding of algorithm analysis and data structure selection based on performance constraints.
• Expertise in:
  • Multithreading
  • Concurrent data structures
  • Shared memory
  • Asynchronous programming
  • JNI (Java Native Interface)
  • Java NIO
  • HashMap and related collections
• Strong understanding of queue theory and queue implementation strategies.
• Experience with networking protocols including TCP and UDP.
• Knowledge of redundancy and fault-tolerance techniques.
• Strong understanding of JVM internals and garbage collection tuning.
• Advanced knowledge of Linux OS and Linux kernel internals.
• Experience tuning applications for high-performance low-latency environments.

• Experience with EFVI JNI and Solarflare Onload Extension APIs.
• Knowledge of:
  • Thread pinning
  • Interrupt handling
  • Core isolation
  • Jitter reduction techniques
  • NUMA architecture
  • TLB caches
• Experience working in ultra-low latency or high-frequency transaction processing environments.

Contract Duration: 6 Months
Location: Chicago IL (Primary) or New York NY
Work Arrangement: Hybrid (2 days onsite per week)