Top Software Engineer Jobs in Montréal, QC

Design, implement, and maintain scalable UE5 gameplay systems for systemic, multiplayer, and user-generated content. Build features for traversal, combat, vehicles, AI interactions, and player-driven mechanics. Support networking, replication, debugging, profiling, and cross-disciplinary collaboration to prototype, iterate, and productionize robust, extensible gameplay frameworks.

Manage and mentor a distributed Engineering Services team (8+ engineers) supporting AAA game co-development, platform optimization, and technical initiatives. Align resources with studio timelines, establish engineering best practices (code review, documentation), build development plans, and contribute hands-on via non-critical coding, technical proofs of concept, and code reviews.

Senior Java developer responsible for designing, building and optimizing enterprise Java applications using Spring and SQL. Apply TDD, write unit/integration tests, implement multithreaded low-latency solutions for financial systems, collaborate with DevOps/QA/product teams, and translate business requirements into technical designs.

Design, build, and maintain highly scalable backend services and APIs for Expedia's content platform. Deliver robust low‑level designs, data models, and well‑tested code; own operational health, observability, and incident response; collaborate with product and cross‑functional teams; and safely integrate AI/ML capabilities to improve content quality and automation.

Build, operate, and extend Affirm's data platform and application tooling to enable self-service data applications at scale. Implement platform features (provisioning, CI/CD, access control), integrations, data governance, automation, observability, and on-call operations. Contribute to roadmap for semantic layers, agentic data tooling, and AI-native workflows while raising engineering and operational standards.

Manage a technical team focused on Git and Git-related infrastructure, balancing upstream open-source work with GitLab priorities. Drive long-horizon scalability, performance, and architectural projects while fostering technical rigor, ownership, mentoring, and strong asynchronous communication across distributed teams.

The Senior Software Engineer will build route planning and tracking systems, develop web applications, and create APIs for logistics and dispatch operations.

Own end-to-end engineering problems across Babylist's Rails monolith and AI-enabled systems. Design, ship, and iterate on features and abstractions, run experiments, harden critical paths, review risky changes, and share AI learnings. Work across backend, frontend, mobile, data and ML infrastructure to improve customer outcomes and platform reliability.

The Senior Solutions Engineer will collaborate with Sales and Account Management to support seller integrations, advise on suitable Square solutions, and offer ongoing support to strategic sellers and partners.

The role involves supporting integration and sales of Square's Developer Platform, collaborating with partners, and advising on solutions for sellers.