Senior Platform Engineer/ High Growth

A high-growth technology organization building mission-critical reliability and incident-response software is looking for a Senior Platform Engineer to help scale the infrastructure behind its platform.
This is a software-engineering-focused infrastructure role for someone who enjoys solving reliability, performance, scalability, and developer experience challenges through production-grade code and automation.
You'll have significant ownership across cloud infrastructure, observability, CI/CD, incident response, and platform architecture while partnering closely with product engineering teams. The environment includes AWS, Terraform, Ruby, Go, PostgreSQL, Redis, Kafka, DynamoDB, and serverless technologies. This role follows a hybrid model with 3 days per week onsite in Downtown Toronto.
Required Skills & Experience

• 5+ years of experience across Platform Engineering, SRE, DevOps, or Infrastructure Engineering, combined with significant production software development experience and the ability to build maintainable tooling beyond shell-based automation.
• Strong hands-on experience with AWS cloud infrastructure and Infrastructure as Code using Terraform, with a solid understanding of distributed systems, production web or RPC services, scalability, and reliability engineering.
• Deep knowledge of observability, monitoring, incident response, CI/CD, performance optimization, SLOs, error budgets, and the operational practices required to support highly available production environments.

Desired Skills & Experience

• Experience building production software or infrastructure tooling with Ruby and/or Go, ideally while working directly within product engineering teams.
• Experience operating distributed data and messaging technologies such as Kafka, PostgreSQL, Redis, DynamoDB, and AWS Lambda in production environments.
• Strong capacity-planning and systems architecture experience, with the ability to identify cross-platform performance, resilience, and scaling risks before they become production issues.

Daily Responsibilities

• Hands-On Engineering: 70%
• Team Collaboration & Cross-Functional Work: 30%
  You will receive the following benefits:
  Medical, Dental, and Vision Insurance
  Vacation Time
  Current Vacancy: Yes
  Use of AI in Hiring: No
  Applicants must be currently authorized to work in Canada on a full-time basis now and in the future.
  Accommodation will be provided in all parts of the hiring process as required under Motion Recruitment's Employment Accommodation policy. Applicants need to make their needs known in advance.
  #LI-AC1