Principal Software Development Engineer, Trading Systems - twentyAI : Job Details

This role offers the chance to work with cutting-edge technology in a collaborative, close-knit team environment, where your expertise will directly impact real-time trading execution. You'll tackle complex engineering challenges, optimize mission-critical systems, and be part of a culture that values innovation, problem-solving, and technical excellence. If you're passionate about building next-generation trading platforms that execute in microseconds and want to work in a fast-paced, rewarding environment, this is the opportunity for you.

Job Title: Principal Software Engineer – Trading Systems

Location: Hybrid – New York, NY

Employment Type: Full-Time, Direct Hire

Key Responsibilities:

• Collaborate with teams across trading, quantitative research, product management, and compliance.
• Design and implement high-performance, Java-based trading applications.
• Work with operations and support teams to improve system stability and scalability.
• Define best practices for performance monitoring, fault tolerance, and system efficiency.
• Develop well-structured, maintainable code with comprehensive testing strategies.

Qualifications

• Extensive experience in Java programming, data structures, and modern software engineering principles.
• 10+ years of experience building low-latency, high-throughput distributed systems.
• Strong understanding of multithreading, concurrency, and Java memory management.
• Ability to write efficient unit tests and integration tests for complex applications.
• Exceptional analytical and debugging skills, with a focus on optimizing system performance.
• Experience with financial or trading platforms, with a solid understanding of reliability and performance requirements.

Preferred Skills

• Background in trading, fintech, or large-scale distributed applications.
• Knowledge of messaging and event-driven architectures (e.g., Kafka, JMS, ActiveMQ, Aeron).
• Experience with containerization and cloud-based infrastructure (Docker, Kubernetes, AWS).
• Familiarity with FIX protocol and high-performance market data processing.
• Strong expertise in databases (PostgreSQL, NoSQL) and distributed tracing tools (e.g., Prometheus, Grafana).

Candidates must be authorized to work in the U.S.; visa sponsorship is not available for this role.