iO Associates
Senior Java Developer
Skills
4 days ago
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Important information
Contract type:
Permanent
Location:
New York, NY, USA
Work mode:
Onsite
Published on:
18 October 2026
What they need
Senior Java Developer (e-Trading)
iO Associates are currently partnered with a leading financial services firm that is building and enhancing a proprietary, high-performance Fixed Income electronic trading platform spanning Credit and Rates products. This is a front-office engineering role partnering directly with traders and quantitative teams to deliver real-time trading applications used for electronic execution across multiple venues.
What you will do
- Design and develop a high-throughput Fixed Income e-trading platform (Credit and Rates)
- Build real-time trading workflows covering axes, RFQs, and dealer-to-client execution
- Integrate and execute orders electronically across multiple ECNs and liquidity venues
- Enhance and support existing trading infrastructure and applications across a mixed technology stack
- Drive architecture and implementation with focus on high availability, scalability, and reusable components
- Collaborate with other Fixed Income front-office teams to promote shared frameworks and common tooling
- Champion best-practice SDLC, including test-driven development and strong engineering governance
- Balance time-to-market delivery with compliance, audit, and control requirements
- Mentor and support junior developers
Required experience
- 5+ years' experience within financial services (front office preferred)
- Strong communication skills and confidence working directly with the trading desk
- Strong software engineering fundamentals: design, coding, testing, debugging
- Deep experience in front-office trading systems, specifically e-trading
- Expert Java development (10+ years); Python is a plus
- Solid understanding of Fixed Income pricing and analytics
- Strong multithreaded / concurrent programming experience
- Understanding of Credit market structure across buy-side and sell-side
- FIX protocol knowledge is a plus
- Experience with ION or Broadway API is a plus
- Strong KDB+/q knowledge is a significant plus
Education
- BS/MS in Computer Science, Engineering, or a related field (or equivalent experience)
This role is based in NYC (Hybrid). Sponsorship is not available for this position.
Get in touch to apply
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