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Senior Software Engineer, Java/FIX

Company:
Harris Allied
Location:
Manhattan, NY, 10261
Posted:
January 06, 2026
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Description:

Senior Software Engineer/Java, FIX

Industry leading fintech with unparalleled expertise delivering highly liquid, scalable trading solutions for the global derivatives market has an immediate need for a Senior Software Engineer to join their growing team in a full-time role. This is an opportunity to design and implement a global, real-time interactive trading system for the interdealer marketplace. In this hands on, lead role, you will develop the connectivity layer of the application leveraging Java and FIX using QuickFix/J on a low code platform. You will be responsible for the development of new software products and enhancements to existing products for the global market.

Responsibilities

Design and develop the connectivity engine in FIX

Triage critical production issues and provide rapid response during trading system incidents as part of the level 3 response team

Writing clean, high-quality, high-performance, maintainable code

Develop and support software including applications, database integration, interfaces, and new functionality enhancements.

Collaborate with cross-functional teams to ensure project meets business objectives and compliance standards.

Support test and deployment of new products and features.

Participating in code reviews Qualifications

5+ years developing production software in Java.

3+ years developing electronic trading technology software.

Experience with low latency trading, market structure, FIX protocol, and related data.

Design and develop efficient, defect-free code under tight time constraints.

Exceptional analysis and triage of real-time production systems

Clear, concise, and accurate written communication skills

Strong work ethic and an entrepreneurial spirit; thrive in a high-pressure environment.

Willingness to learn and desire to implement AI solutions that increase developer productivity.

Expertise with Object Oriented Design, Database Design, and XML Schema

Experience with Agile or Scrum software development methodologies

Ability to multi-task, organize, and prioritize work.

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