Senior Software Developer / JVM, Low Latency / Trading System

About the job

A leading global financial technology organization is seeking a Senior Java Software Engineer to join its Core Markets team in Philadelphia. This team is responsible for building and maintaining a real-time, mission-critical derivatives market system that supports high-volume options trading. This is not a traditional web application or cloud microservices position. The role is focused on deep, performance-oriented Java engineering where throughput, latency, reliability, and correctness are critical. You'll work on systems where milliseconds matter and where strong understanding of the JVM and low-level software engineering is highly valued. The Role You will design, develop, optimize, and maintain high-performance Java systems supporting real-time trading. The ideal candidate enjoys working close to the underlying technology and has a strong understanding of topics such as threading, concurrency, memory management, garbage collection, and performance optimization. Key Responsibilities

• Develop high-performance applications using Core Java
• Design and maintain highly scalable, low-latency trading systems
• Optimize application performance, memory usage, and system throughput
• Work extensively with concurrency, multithreading, and JVM internals
• Analyze and troubleshoot complex performance issues
• Write highly reliable, maintainable, and thoroughly tested code
• Collaborate with other engineers to improve system architecture and performance
• Participate in production support for mission-critical trading systems
• Explore AI tools and automation opportunities to improve engineering and quality processes

Required Qualifications

• Strong professional experience with Core Java
• Strong understanding of Java internals and low-level programming concepts
• Experience with multithreading, concurrency, and performance optimization
• Understanding of memory management and garbage collection
• Experience developing high-throughput, low-latency systems
• Strong software engineering and problem-solving skills
• Bachelor's degree in Computer Science or a related field

Preferred Qualifications

• Experience in trading, financial technology, capital markets, or exchange environments
• Experience working on real-time or mission-critical systems
• Experience with JVM performance tuning
• Interest or experience using AI tools for automation, development, or quality engineering
• Experience working in environments where reliability and performance are critical

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