Top C++ Jobs in Montreal

Develop and maintain reusable front-end components for CBC/Radio-Canada’s OTT platforms, including audio and video players. Collaborate with product owners, architects, and technical managers to deliver features, ensure application quality and performance, participate in Agile Scrum ceremonies, develop user stories, conduct code reviews, and support deployments. The role requires C#, ASP.NET Core, WebAPI, REST, Git, SQL Server, and Entity Framework expertise in a bilingual English-French environment.

Implement and ship Storage Encryption Everywhere in Firefox’s Gecko engine. Responsibilities include schema migrations, encrypted data storage, integration testing, Web Platform Tests, Gecko tests, code review, specification clarification, release shepherding, and fixing correctness, performance, and regression issues across Nightly, Beta, and Release channels.

Senior C# developer for CBC/Radio-Canada's OTT team to design, build and maintain reusable backend components (audio/video player APIs), ensure quality and performance, participate in Agile ceremonies, code reviews, deployments, and propose technical solutions. Work in bilingual (EN/FR) environment.

Design and implement core blockchain node software in modern C++, including consensus, privacy-preserving cryptography, and high-performance P2P networking. Optimize transaction processing, enforce memory safety, maintain cross-platform CMake/Bazel builds, and conduct security-focused code reviews. Collaborate with cryptography researchers on zero-knowledge proofs, homomorphic encryption, MPC, and signature systems.

Develop and maintain scalable Java and C++ software for a strategic capital-markets platform. Responsibilities include full-lifecycle development, technical design, testing, deployment, production support, defect investigation, performance improvement, code reviews, architecture collaboration, CI/CD, and Agile delivery. The role requires collaboration with global technology and business teams and supports modernization and operational resilience.

Build and lead high-performance browser features in modern C++ and Chromium, including tracker blocking, subscription integrations, and responsiveness monitoring. Own complex projects from proposal through post-mortem, solve ambiguous technical problems, make architecture decisions, collaborate asynchronously with product and design, and use metrics to evaluate outcomes in a large-scale consumer codebase.

Build and maintain scalable, cloud-native APIs and high-value core system components using .NET and related technologies. Lead software architecture and testing discussions, enhance core offerings, collaborate cross-functionally, and ensure quality through code reviews, unit testing, functional testing, telemetry, and performance tuning. Mentor teammates and contribute to continuous technical and process improvement.

Develop and maintain desktop, web, backend, and cloud software for transit and physical security products. Responsibilities include building C#/.NET and WPF applications, REST APIs, cloud services, integrations, automated tests, and web features using Angular, React, and TypeScript. The role involves troubleshooting distributed applications, contributing to architecture and code quality, participating in reviews and design, and collaborating with QA and support teams throughout the software development lifecycle.

Participate in a rotational engineering program building high-performance, low-latency electronic trading infrastructure. Develop market data, execution, research, simulation, risk management, monitoring, and performance systems using C++. Collaborate with quantitative researchers, traders, and engineers to deploy systematic trading strategies, optimize production systems, and diagnose performance or data issues. Rotate across engineering teams before transitioning to a permanent placement.

Maintain and improve Firefox Graphics code covering rendering, compositing, images, canvas, and WebGL. Diagnose and fix cross-platform graphics issues, resolve bugs and regressions, maintain tests, review code, and manage incoming issues. The role requires strong C++ or Rust skills, graphics framework and GPU architecture knowledge, multithreaded debugging and optimization ability, and independent technical leadership in a mature codebase.

Lead modernization of a 30-year-old Store Management System by reverse engineering EZC file-based platforms, migrating data and applications to PostgreSQL, and developing enterprise C/C++ software. Responsibilities include architecture, systems integration, APIs, ETL, performance optimization, troubleshooting, documentation, and maintaining business continuity. The role also applies AI-assisted development tools for code analysis, documentation, testing, and modernization while mentoring teams and supporting legacy and modern environments.

Develop, test, and maintain C++ applications for ultra-low-latency exchange connectivity in a Linux environment. Participate in design reviews, automation and CI/CD, collaborate with team members, and use Python scripting and modern AI tools to improve workflows and software quality.

Design, develop, and optimize complex C++ applications for safety-critical systems. Define architectures, build UIs and data-processing algorithms, apply TDD/BDD and QtTest/Google Test, perform code reviews, document designs, collaborate with multidisciplinary teams, and support V&V and hardware teams with tooling.

The Software Developer will work on a world-class enterprise video surveillance solution, participating in design, development, and task planning while collaborating with quality assurance members. Responsibilities include developing new features, architecting solutions, and engaging in peer programming.

As a Software Developer, you'll design, develop, and deploy web applications using cutting-edge technologies, collaborating closely with UX designers and other teams to enhance user experience.

Integration Engineer for a high-throughput, real-time trading system. Manage production environment, deploy upgrades, design trading functionality, troubleshoot production issues, script with Perl/Shell, work with Linux-based C++ services and Java/C# front ends, and collaborate with traders and the team.

As a Software Engineer, you will develop and maintain the Tally software stack, enhance robot navigation and autonomy, and support CI/CD processes.

Develop and support high-throughput C++ transaction/event processing software on Linux/UNIX. Implement threading, interprocess communication, and XML-based messaging. Contribute to delivery, debugging, and production support of performance-sensitive systems.

Develop high-performance C++ market-data components (feed handlers, parsers, value-add servers) across asset classes. Optimize for low-latency, handle TCP/multicast, implement multithreading, memory management, and I/O on Linux. Debug and profile with gdb and performance tools. Work quickly in a fast-paced environment and communicate clearly in English.

Design and implement a high-frequency trading platform, optimize for latency, develop market data systems, and create analysis tools.

Develop and maintain modern microservices using C#, ASP.NET, and NoSQL databases. Involve in CI/CD processes and contribute to full-stack development within a collaborative team.

Develop and maintain web application features using C#/ASP.NET Core and TypeScript/Angular. Diagnose and fix bugs, resolve production issues, write automated tests, improve architecture, performance and maintainability, and collaborate with QA and UX teams. Participate in continuous improvement of team practices and complete a foundational programming course during the first year.

Join a team focused on computer vision and machine learning projects as an expert C++ developer, impacting leading global companies.

As a Sr. Software Engineer, you'll design and develop features for a SaaS platform, collaborate with teams, tackle technical problems, and ensure high-quality solutions with an ownership mindset.

Develop and optimize ultra-low-latency, high-performance trading infrastructure in modern C++. Implement and tune order execution, market data connectivity, multi-threaded systems, and risk modules. Profile and benchmark real-time systems, collaborate with quants and traders, and maintain robust, fault-tolerant continuous trading operations.