Senior Software Engineer – Low Latency & Realtime Systems Ontario

Overview

The Low Latency Platform and Realtime Technology teams build and maintain the core infrastructure that powers GTS's electronic trading systems. Our software is responsible for the reliable movement, processing, and distribution of market data and trading events across a globally distributed, high-performance environment where latency, throughput, and resiliency are critical.

This role is focused on designing and developing the foundational systems that enable real-time trading  will work on low-latency services, messaging infrastructure, distributed systems, and performance-critical applications that support some of the most demanding workloads in financial markets. The position is ideal for developers who enjoy solving complex systems problems, optimizing software for performance and reliability, and working close to the interaction between hardware, networking, and software.

GTS is a collection of financial services companies spanning a wide array of asset classes and investment approaches, all powered by the combination of market expertise with innovative, proprietary technology. With roots as a quantitative trading firm continually building for the future, the GTS family of companies are able to leverage the latest in artificial intelligence systems and sophisticated pricing models to bring consistency, efficiency, and transparency to today's financial markets.

GTS's electronic market maker GTS Securities accounts for 3-5% of daily cash equities volume in the U.S. and is a leading Designated Market Maker (DMM) at the New York Stock Exchange, responsible for nearly $13 trillion of market capitalization. For more information on GTS, please visit

• Design, develop, and maintain high-performance C++ software that powers GTS's real-time trading infrastructure
• Build and enhance low-latency messaging, market data, and event distribution systems used across the firm
• Analyze, profile, and optimize application performance across software, operating system, and network layers
• Collaborate with trading, infrastructure, and other engineering teams to deliver robust solutions for mission-critical production environments

• Significant professional experience designing and building production software systems in C++ (typically 5-10+ years of experience)
• BS/MS degree in Computer Science, Computer Engineering, or related technical field
• Strong proficiency in modern C++ and systems-level software development
• Demonstrated ability to effectively leverage modern AI-assisted software development tools to build high-quality software efficiently while maintaining strong engineering standards
• Experience developing software on Linux platforms
• Strong understanding of concurrent programming, multithreading, and performance-oriented system design
• Experience building distributed systems, real-time applications, or low-latency infrastructure
• Solid understanding of networking concepts and protocols (TCP/IP, UDP, multicast)
• Experience diagnosing and optimizing application performance in production environments
• Strong communication skills and ability to collaborate effectively across technical and non-technical teams
• Ability to work independently and as part of a highly collaborative engineering organization

• Experience in electronic trading, market data, or financial systems
• Experience with time-series or relational database technologies

Daily Meal Allowance, Equinox Corporate Membership Rate, Snacks, Casual Dress.

4 Days a Week in office, Fridays can be worked from home.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, age, national origin, or protected veteran status, and will not be discriminated against on the basis of disability.