Top Software Engineer Jobs in Montreal

Design and develop backend features for Affirm’s underwriting platform, supporting merchants and consumers across Affirm Card, e-commerce, and app interfaces. Collaborate with product, design, analytics, and credit risk teams; implement reliable distributed systems; monitor metrics and availability; participate in on-call support, code reviews, debugging, interviewing, and engineering growth activities.

Lead the technical direction and implementation of large-scale SaaS product features. Build secure, reliable, maintainable, well-tested software; evaluate architectural trade-offs; debug team inefficiencies; and contribute to code reviews, documentation, and complex bug fixes. Collaborate across product, design, and engineering, influence strategy, identify organizational blockers, mentor engineers, and improve engineering practices around testing, performance, security, privacy, and reliability.

Build and launch full-stack customer-facing features and backend services for Affirm Card. Collaborate with product, design, analytics, and engineering teams; design scalable APIs, support distributed systems, monitor service reliability, participate in on-call operations, review code, and contribute to technical planning and team development.

Build and operate high-throughput backend services for AI agent orchestration, calendar systems, real-time infrastructure, APIs, and data pipelines. Design scalable platform services, infrastructure as code, and highly available production systems using Go, PostgreSQL, Kubernetes, and cloud platforms. Collaborate with AI, product, and frontend teams to deliver AI-powered features, contribute to reliability and testing practices, and mentor junior engineers.

Leads the technical direction and implementation of large-scale product features. Builds secure, reliable, maintainable, and well-tested full-stack software; evaluates technical trade-offs; collaborates with product and design teams; resolves production issues; contributes to reviews and documentation; and mentors junior engineers.

Design, build, and maintain customer-facing React frontend systems for search, catalog navigation, data lineage, dashboards, and AI-assisted analysis. Improve performance across large trees, tables, and streaming interfaces; shape product and UX decisions with design and product partners; raise engineering quality through reviews, documentation, complex bug resolution, and mentorship.

Build and operate Block’s data platform, including warehousing, orchestration, business intelligence, governance, and agentic workflows. Develop reliable Python services, developer tools, and Terraform infrastructure for petabyte-scale data. Partner with data practitioners and product teams, establish engineering standards, provide technical direction, and mentor engineers while ensuring security, reliability, observability, usability, and data governance.

Build and operate a scalable data platform supporting warehousing, orchestration, business intelligence, governance, and agentic workflows. Develop Python services, Terraform infrastructure, and developer tools for petabyte-scale data. Partner with data practitioners and product teams, establish security and reliability patterns, set technical direction, improve engineering standards, and mentor engineers.

Designs, builds, and operates scalable full-stack content platform services and user interfaces. Responsibilities include API and system design, data modeling, coding, testing, deployment, monitoring, support, performance optimization, and incident response. The role owns end-to-end feature delivery, uses metrics and experimentation to improve systems, and integrates AI/ML solutions safely. Collaboration across teams is required to develop reusable, extensible content components and platforms.

Build and operate end-to-end full-stack features for Loom billing, subscriptions, integrations, and platform migrations. Develop responsive React interfaces, scalable backend APIs and microservices, payment and identity integrations, and reliable cloud-based systems. Responsibilities include observability, monitoring, testing, code reviews, documentation, security, performance optimization, and participation in Agile ceremonies and technical design reviews.

Build REST APIs, customer-facing React components, backend monitoring, CI/CD pipelines, and content-management integrations. Collaborate with engineering, UX, and visual design teams while developing full-stack solutions using JavaScript or TypeScript, React, Node.js, server technologies, and cloud platforms. The role is fully remote but limited to candidates located in Canada within the PST or MT time zones.

Lead complex backend engineering projects from design through launch, solve architecture and high-risk technical problems, conduct code reviews, develop scalable microservices and distributed systems, mentor engineers, and collaborate across teams. The role requires strong experience with backend applications, prominent programming languages, public cloud platforms, databases, software architecture, agile development, and performance trade-offs. Candidates must be located in Canada within the PST or MT time zones.

Build and ship scalable backend features and services in a distributed environment. Responsibilities include developing RESTful microservices, reviewing code, monitoring service performance, improving reliability and security, participating in Agile development, and mentoring teammates. The role requires proficiency in a modern object-oriented language, database experience, cloud knowledge, and familiarity with scalable architecture patterns.

Provides technical leadership for Expedia Group’s content platforms, defining backend and full-stack architecture for scalable content acquisition, enrichment, curation, and delivery. Designs AWS cloud-native systems, REST and gRPC APIs, data models, and distributed services. Establishes engineering standards for testing, deployment, reliability, observability, and operational excellence across multiple teams. Guides cross-functional architecture decisions and the safe production integration of AI and machine learning capabilities. Requires 10+ years of experience and French-English bilingualism.

Principal Full Stack Software Engineer responsible for guiding technical direction, designing large-scale SaaS features, and building secure, reliable distributed systems. The role involves collaborating across product, design, and engineering; evaluating technical trade-offs; debugging team inefficiencies; contributing to code reviews and complex fixes; mentoring engineers; and improving engineering practices around testing, performance, security, privacy, and service operations.

Provides technical leadership on complex, high-impact engineering projects from design through launch. The role involves architecture, company-wide initiatives, engineering excellence, mentoring technical leaders, and establishing standards for scalable, reliable, secure, observable systems. The engineer will collaborate across teams, communicate complex technical topics, and apply customer-focused decision-making and A/B testing techniques.

Participate in a 15-week full-time software engineering internship in Vancouver, Burnaby, or Richmond. Build and ship product features, contribute code to Atlassian products, apply data structures and algorithms, and learn full-lifecycle development through mentorship and collaboration with senior engineers. Work may involve cloud initiatives and AI-driven features.

Develop and ship web, mobile, and API features for Affirm’s card acquisition experience. Break projects into deliverable phases, collaborate with product, design, and analytics, write tested and extensible code, support production availability through metrics and on-call activities, review code, and contribute to interviewing and team development.

Develop and maintain modern C++ components for Eaton’s CYME desktop application, focused on electricity distribution network and renewable energy modeling. Responsibilities include code design, pull request reviews, unit testing, technology evaluation, and GitHub workflow automation. The role also supports integrating CYME calculation engines into Eaton’s Advanced Distribution Planning System. Candidates must have a software engineering or computer science degree, modern C++ experience, Jira and GitHub experience, bilingual English and French fluency, Canadian work authorization without sponsorship, and residence within 80 km of Brossard.

Contribute to fullstack search engineering projects, developing and launching scalable backend systems and user-facing solutions. Collaborate with teammates and stakeholders, balance speed and quality, protect system reliability, navigate large codebases, debug code, participate in reviews, and communicate effectively. The role supports growth through feedback and development activities.

Twelve-month software development program for new graduates at Unity. Participants complete a technical bootcamp and rotate through two engineering teams working on the Unity engine, rendering, production tools, documentation, quality, or graphics. The role provides mentorship, structured feedback, hands-on C++ and performance optimization experience, and exposure to real production code. Candidates must demonstrate programming ability, curiosity, collaboration, and interest in building software.

Designs, develops, tests, documents, and enhances software for Zebra’s Aurora Imaging Library machine vision SDK. Evaluates and optimizes performance on ARM systems using profiling, benchmarking, SIMD, parallel processing, and Arm NEON. Participates in code reviews, system integration, technical problem-solving, quality processes, and methodology improvements. The role also supports less experienced engineers and requires hybrid work in Montreal at least three days per week.

Lead technical strategy and execution for a full-stack card experiences team. Design and launch scalable backend systems and web or mobile applications, collaborate with product, design, analytics, risk, and operations, and own features from problem definition through production monitoring. Improve reliability, on-call operations, code quality, and technical standards while mentoring engineers and applying AI thoughtfully.

Lead the creation of Babylist’s in-house search platform from zero to production. Own architecture for indexing, retrieval, ranking, query understanding, personalization, quality measurement, and conversational search. Set technical and product direction, drive cross-team initiatives, build scalable platforms, partner with product, design, data, and AI teams, and coach senior engineers. The role requires hands-on production search experience, strong system design, user-focused experimentation, and ownership of measurable customer and business outcomes.

Build and ship full-stack web applications and scalable APIs for Affirm’s advertising platform. Break projects into deliverable phases, collaborate with product, design, and analytics partners, write tested and extensible code, monitor service metrics, support on-call operations, review code, and contribute to engineering growth and hiring activities.