Backend Software Developer – Fiber Monitoring & Network Visibility Platforms Location: Montreal – Hybrid Department: Software Engineering Reports To: Engineering Manager / Dev Manager Employment Type: Full‑time 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 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 5–7 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 professional growth opportunities Equal Opportunity Statement EXFO is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. #J-18808-Ljbffr