Java Software Development Engineer

Our Toronto based client is looking for a Full Stack Engineer – Java / Capital Markets to join their growing team.
Work Model: Hybrid – 3 days/week in office
12 month contract
Are you a hands-on Java Engineer who thrives in high-performance, low-latency environments?
Our client is looking for a Full Stack Engineer with deep Core Java expertise and Cash Equities / Front-Office Trading experience to join their team in Toronto.
You'll help build, enhance, optimize, and support highly automated, scalable, and performance-critical trading technology.
Important: This is a Hands-On Coding Role
You must be actively coding in your current/recent role.
The team is specifically looking for engineers with strong, hands-on Core Java expertise. Candidates should expect to demonstrate their coding and problem-solving abilities during the technical interview process through live coding and working with existing code.

3 days per week in the office in downtown Toronto
Depending on the rotation, working hours may begin as early as 7:00 a.m. The team provides coverage for early-morning trading activity and production releases.
Occasional work on Canadian holidays may be required to support global operations.
Candidates should expect 2–3 technical interview rounds, with the potential for:
Live coding
Technical problem-solving and debugging scenarios
The technical interviews are designed to assess how you actually approach and solve problems, not simply what technologies appear on your resume.
You'll have the opportunity to work on mission-critical electronic trading technology within a global Capital Markets organization, contributing to systems where scalability, performance, reliability, and engineering quality directly matter.
If you're a hands-on Java engineer with genuine Cash Equities/front-office trading experience and want to work on challenging, high-performance technology, we'd love to hear from you.
Design, develop, test, and deploy enhancements to a global electronic trading platform.
Develop and optimize highly performant, low-latency Java applications.
Troubleshoot complex technical and production issues.
Analyze and improve application performance using data-driven optimization techniques.
Collaborate with software engineers, traders, and technology teams across Canada, Mexico, New York, and Asia.
Strong Core Java expertise – non-negotiable
Cash Equities / Front-Office Trading experience – non-negotiable.
Extensive hands-on Java development experience.
Garbage collection
Performance optimization
Experience developing low-latency and/or high-performance applications.
Experience working directly with traders or front-office stakeholders.
Good command of Linux/UNIX command-line environments.
Demonstrated experience coding on a daily basis.
Profiling and metrics-based performance optimization.
Experience using agentic AI/AI tools for software maintenance and development.
React or other front-end experience.
Don't Have React? Despite the Full Stack Engineer title, extensive front-end experience is not required for this role.
The priority is deep Java/backend engineering expertise and capital markets/trading experience. React experience is considered an asset but is not a requirement.
Java Engineer
Senior Java Developer
Low-Latency Java Engineer
Front-Office Developer
Cash Equities Developer
You should be someone who enjoys solving difficult technical problems, understands what happens under the hood of a Java application, and is comfortable working in an environment where performance, reliability, and speed matter.
The original requirement calls for 10+ years of software engineering experience, particularly in low-latency or real-time systems.
Candidates with approximately 5+ years of highly relevant experience may be considered where they demonstrate exceptional Core Java, Cash Equities, and front-office trading expertise.
Relevant technical depth matters more than simply counting years of experience.
If you're still coding every day, understand high-performance Java, and have worked in a front-office trading environment, this could be an excellent opportunity to take on a high-impact role in global electronic trading.
Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.
Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to View email address on randstad.com.