Sr. Backend Engineer

Location: Montreal, Canada

Type: Full-time

About Coverstar

Coverstar is building the first safe, creative, AI-native social platform for Gen Alpha. We’ve built a COPPA-compliant community where kids can create, collaborate, and grow safely.

We’re backed by top investors like a16z, moving fast, and hiring a mission-aligned Backend Engineer to help us power the next generation of personalized content and community.

What You’ll Do

As a Sr. Backend Engineer, you’ll maintain, optimize, and scale Coverstar’s backend systems to ensure they’re secure, reliable, and high-performing. You’ll lead efforts in infrastructure, monitoring, and incident response while partnering with backend, data, and AI teams. Your work keeps every feature, feed, and livestream running smoothly and safely for our community.

As an Sr. Backend Engineer, you’ll:

Backend & Cloud Expertise

• Hands-on backend development experience, with deep proficiency in AWS services (EC2, Lambda, S3, ECS, RDS, DynamoDB, SQS, and more)
• Strong command of Node.js and Python for production systems; ideally familiarity with C/C++ or Rust for performance-critical components
• Senior-level SQL skills with experience in both relational databases (PostgreSQL) and NoSQL solutions (DynamoDB, Redis), including performance optimization and scaling strategies
• Drive proactive capacity planning and long-term infrastructure improvements.
• Experience building CI/CD pipelines is a plus.

AI/ML Infrastructure Support

• Partner with AI/ML engineers to build and scale model training and inference pipelines.
• Design and maintain data pipelines for preprocessing, labeling automation, and model integration.
• Optimize compute and storage architecture for efficient training and deployment.