Senior Software Engineer (Fintech)

TL;DR

Senior Software Engineer (Fintech): Building and optimizing ultra-low-latency, high-throughput systems for a global B2B FinTech company with an accent on Java-based services, performance optimization, and reliability. Focus on designing scalable microservices architecture, troubleshooting production issues, and ensuring mission-critical system resilience.

Location: Hybrid/On-Site in New York, NY. Applicants must be authorized to work for any employer in the United States. Sponsorship is not available for this role.

Salary: $160,000 – $190,000 USD

Company

Our client is a global B2B FinTech company building modern infrastructure that powers investing and trading experiences worldwide through an API-first platform.

What you will do

• Partner cross-functionally with trading desks, quantitative teams, product, risk, and compliance to support and enhance trading systems.
• Lead technical design and delivery of greenfield and existing Java-based services using modern best practices.
• Analyze engine latency and throughput, identifying opportunities to optimize performance across different scenarios.
• Monitor production systems and analyze operational data to troubleshoot issues and resolve them quickly.
• Contribute to building highly available, resilient backend services that operate in real-time environments.

Requirements

• Strong Java fundamentals, data structures, and modern software engineering best practices.
• 5+ years of experience working on low-latency, high-throughput distributed systems.
• Experience with multithreading and concurrency in Java.
• Solid understanding of Java Garbage Collection and performance tuning.
• Experience writing effective unit and integration tests.
• Strong communication, analytical, and problem-solving skills, with knowledge of operating systems and networking fundamentals.

Nice to have

• Experience in brokerage, trading systems, fintech, or other high-transaction environments.
• Knowledge of message brokers and messaging libraries such as JMS, Kafka, ActiveMQ, or Aeron.
• Experience with containerization tools such as Docker or Podman.
• Experience with the FIX messaging protocol.
• Experience with PostgreSQL.
• Experience with AWS and Linux shell scripting.

Culture & Benefits

• Competitive medical, dental, and vision insurance with mental health resources.
• Generous paid time off and observed holidays, plus paid parental leave.
• Annual budget for professional development and continued education.
• Annual fitness and wellness reimbursement.
• Pre-tax commuter benefits (U.S.).
• Employer 401(k) match (U.S.).