Location: Montreal - Hybrid
About Us We build mission-critical fiber monitoring and network visibility platforms used by leading telecommunications operators and data center providers worldwide. Our solutions enable real-time monitoring of fiber networks, including fault detection and localization, signal degradation analysis, and service assurance, across outside plant (OSP), data centers, and DCI environments. Our software platform is based on a containerized microservices architecture, runs primarily on Linux, and is deployed in on-premises, cloud, and hybrid environments. Reliability, scalability, performance, and operational excellence are at the core of what we do.
The Role We are looking for a Senior Backend Software Developer (5–10 years of experience) to design, develop, and evolve the backend services at the heart of our fiber monitoring platforms. You will work on distributed systems, API-driven services, and high-throughput data pipelines in a domain where software interfaces directly with real-world network and hardware infrastructure. This role is ideal for someone who is curious, autonomous, and detail-oriented, and who enjoys understanding complex systems end-to-end and seeing their work running in production at scale.
Key Responsibilities Design, develop, and maintain backend services and microservices with a strong focus on performance, reliability, and resilience
Develop backend services primarily using Java, Node.js, and Go (Golang)
Design, document, and maintain robust and versioned RESTful APIs
Contribute to the evolution of a microservices architecture deployed in containerized environments
Package and deploy applications using Docker
Collaborate closely with DevOps teams to operate services in production (monitoring, logging, alerting)
Participate in architecture discussions, design reviews, and code reviews
Troubleshoot and resolve complex issues in production distributed systems
Contribute to CI/CD pipelines, automated testing, and engineering best practices




Work closely with Product, QA, and other engineers to deliver reliable and valuable features
Required Technical Skills 5–10 years of professional backend software development experience
Strong experience developing backend services using Java, Node.js, and Go (Golang) in production environments
Solid understanding of microservices architectures, including: Service boundaries and ownership Inter-service communication patterns API design, versioning, and governance Scalability, resiliency, and fault-tolerance concepts
Proven hands-on experience with Docker and containerized applications
Experience designing and consuming REST APIs
Comfortable working in Linux environments
Proficiency with Git and collaborative development workflows
Good understanding of concurrency, networking, and performance considerations in backend systems
Observability & Operations Experience with logging, monitoring, and alerting in production environments Familiarity with observability concepts and tools (metrics, distributed tracing, logs) Ability to diagnose and analyze issues across multiple services, containers, and infrastructure layers
Assets / Nice to Have Experience working with embedded systems or systems close to hardware
Knowledge of the C# language, particularly in system-level tools, utilities, or backend integrations
Background in telecommunications, network monitoring, or fiber-optic networks
Familiarity with event-driven architectures and real-time or near-real-time distributed systems
Experience with iOS and/or Android mobile development, particularly for visualization, diagnostics, or control applications,



is considered an asset
Understanding or practical experience with AI coding assistants and agent-based development tools (e.g., Cursor or similar)
Soft Skills & Mindset Naturally curious and motivated to deeply understand how systems behave in production
Self-driven and autonomous, able to own features from design through deployment
Strong analytical and problem-solving skills
Clear communicator, comfortable collaborating across teams
High standards for quality and a strong sense of ownership for production systems
Team-oriented with a proactive attitude
Requirements Bachelor’s degree in Software Engineering, Computer Science, or equivalent professional experience
Working or fluent English required (French is a strong asset)
Legal authorization to work in Canada
What We Offer Competitive salary and comprehensive benefits package
Hybrid and flexible work environment
Opportunity to work on real-world infrastructure at global scale
Collaborative, pragmatic engineering culture
Long-term product roadmap with meaningful technical challenges
Continuous learning and qualified growth opportunities
Legal & Equal Opportunity Statement EXFO is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.
Company Background EXFO develops intelligent software and hardware solutions to test, monitor and analyze the performance of telecommunications networks. Established in 1985, we are trusted advisors for fiber optic, 5G and cloud-native deployments. With operations in 25+ countries-and counting!—we serve the world’s leading mobile network operators, hyperscalers and transceiver manufacturers. Our team welcomes new members with all kinds of skillsets and backgrounds. That’s how we accomplish our mission: to ensure the connected world meets the highest expectations, to bring together people, communities and businesses.

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📌 Développeur Logiciel Backend (Quebec City)
🏢 EXFO
📍 Quebec City