Ingénieur.e Backend Senior | Senior Backend Engineer

Matador•Laval, QC

11h•CA$140,000 - CA$160,000•Hybrid

About The Position

We’re seeking a Senior Backend Engineer to help scale and evolve our AI-powered communication platform. This role involves far more than shipping features—you’ll architect and build backend systems that power thousands of real-time interactions across distributed, event-driven systems. You’ll also help us improve performance, scalability, and resilience across our platform as we continue our fast-paced growth.

Requirements

5+ years of backend development experience, ideally in fast-paced or high-growth environments
3+ years of hands-on experience with Node.js and TypeScript in production environments, having built (not just consumed) services
In-depth experience with MongoDB and Redis in real-world use cases
Proven experience with AWS services including ECS, Lambda, SQS, and API Gateway
Hands-on experience with event streaming and message brokers (Kafka and AWS SQS), and a track record of building scalable, event-driven systems
Strong understanding of microservices architecture, distributed system design, async workflows, reliability, and architecture
Track record of building scalable systems and improving performance under high load
Experience working in complex codebases, with examples of successfully implemented refactoring initiatives
Ability to explain technical trade-offs and decisions clearly to both technical and non-technical team members
Experience collaborating with cross-functional teams, mentoring and leading engineers, and providing senior technical leadership on architecture decisions and scaling complex systems

Nice To Haves

Kubernetes and container orchestration in production
Broader AWS infrastructure experience (networking, infrastructure-as-code,observability, cost optimization)
Experience with relational databases such as PostgreSQL alongside our core data stores

Responsibilities

Architect and develop scalable backend services and REST APIs using Node.js (Express) and TypeScript
Optimize data interactions using MongoDB (schema design, indexing, performance tuning) and Redis (caching, pub/sub)
Deploy and manage services using AWS (ECS, Lambda, SQS, API Gateway)
Design and operate event-driven services and asynchronous messaging pipelines using Kafka and AWS SQS
Lead the design of high-scale, distributed microservices and event-driven systems built with concurrency, async workflows, and eventual consistency in mind
Write highly efficient, optimized code that minimizes latency and memory usage
Troubleshoot performance issues and implement improvements across the backend stack
Proactively manage and refactor legacy code to reduce technical debt
Collaborate with cross-functional teams—AI, product, frontend, QA, and DevOps—to align tech decisions with business needs
Participate in code reviews, technical planning, and mentoring junior engineers