Senior C/C++ Software Developer

Position Description:

We are seeking a Senior Software Developer – Electronic Trading Systems with 5–10 years of relevant industry experience to design, develop, enhance, and support high performance trading applications. The successful candidate will work closely with traders, quantitative researchers, Market Access, Infrastructure, Operations, and Compliance teams to deliver reliable, low latency, and scalable trading solutions. This role requires strong C/C++ and Java development experience, excellent troubleshooting abilities, and a solid understanding of Linux, networking, databases, multithreading, and modern DevOps practices.

Location: Montréal Work mode: On site

Your future duties and responsibilities:

• Designed, developed, and maintained high-performance electronic trading applications in collaboration with traders and quantitative researchers.

• Analyzed business and technical requirements to deliver new trading features, algorithms, and enhancements to existing applications.

• Optimized trading platforms for performance, low latency, scalability, stability, and reliability.

• Provided production support by monitoring trading systems, troubleshooting critical production issues, and implementing automation to improve platform stability and reduce operational risk.

• Collaborated with Market Access, IT Infrastructure, Operations, Back Office, and Compliance teams to ensure reliable market data delivery, order routing, infrastructure availability, and regulatory compliance.

• Implemented trading functionality in accordance with financial market regulations, including Reg NMS, Reg SHO, and other applicable compliance requirements.

• Contributed to the continuous improvement of electronic trading platforms by enhancing system resilience, availability, and operational efficiency.

• Technical Environment

Required qualifications to be successful in this role:

Minimum Required Qualifications

• 5–10 years of relevant software development or financial technology experience.

• Bachelor's degree in Computer Science, Software Engineering, or a related discipline.

• Good knowledge of French and English*

• Strong technical, analytical, and troubleshooting skills.

• Ability to diagnose and resolve complex production issues quickly under pressure.

• Strong experience with:

• C/C++

• Java and Spring Boot

• Object oriented programming and design

• Real time and multi threaded programming

• Linux systems and low level Linux concepts

• Network programming, including sockets, TCP/IP, and multicast/UDP technologies

• SQL and Oracle PL/SQL

• Python and Bash scripting

• DevOps and Continuous Delivery practices

• Jenkins, JUnit, Gradle, and Git

• Code quality, performance profiling, debugging, and optimization tools

• Excellent verbal communication and collaboration skills.

Preferred Qualifications

• Master's degree in Computer Science, Engineering, or a related discipline.

• Experience or knowledge of financial markets and electronic trading is an asset but not required.

• Understanding of multi core architectures and performance optimization.

• Experience with libraries and technologies such as Boost, Qt, Onload, and VMA.

• Experience with NoSQL and in memory technologies such as Redis and Memcached.

Java • C# • SQL • Linux/Unix • Git • CI/CD • Electronic Trading Platforms • Market Data • Market Access • Trading Algorithms • Production Support • Databases • Networking • Automation

Location: Montréal Work mode: 4 days/week On site

*Ability to communicate in English, both orally and in writing, is a requirement as the person in this position will need to collaborate regularly with colleagues and partners in Canada and the United States.

CGI is providing a reasonable estimate of the pay range for this role. The determination of this range includes factors such as skill set level, geographic market, experience and training, and licenses and certifications. Compensation decisions depend on the facts and circumstances of each case. A reasonable estimate of the current range is $70,000–$135,000. This role is an existing vacancy.

#LI-AR1 Bilingualism (French and English) is required for this position due to the nature of the role requiring interaction with national and global clients.

Skills:

• C++

• DevOps

• French

• Java

• Linux

• Spring Boot

What you can expect from us:

Together, as owners, let’s turn meaningful insights into action.

Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

At CGI, we value the strength that diversity brings and are committed to fostering a workplace where everyone belongs. We collaborate with our clients to build more inclusive communities and empower all CGI partners to thrive. As an equal-opportunity employer, being able to perform your best during the recruitment process is important to us. If you require an accommodation, please inform your recruiter.

That same commitment to fairness extends to how we use technology. To support our recruitment team, AI tools may be used to help assess applications though they never replace human judgement. All hiring decisions remain entirely in the hands of our recruitment professionals.

To learn more about accessibility at CGI, contact us via email. Please note that this email is strictly for accessibility requests and cannot be used for application status inquiries.

Come join our team—one of the largest IT and business consulting services firms in the world.