Senior Site Reliability Engineer, Infrastructure

Fleetio is a modern SaaS platform that helps thousands of organizations worldwide manage their fleet of vehicles and equipment. Founded in 2012, they raised a Series D in 2025 with $450M, serving 6k+ customers and achieving $65M+ ARR with 350+ employees and a 4.5 Glassdoor rating. Fleetio is a proud founding member of the Rails Foundation and has been remote-first since 2012.

We’re looking for a Senior Site Reliability Engineer to join our growing Platform Engineering team. This role will have a direct impact on our customers, our engineers, and our business by ensuring our applications are highly available, scalable, and performant.

Who You Are Our ideal candidate is an Infrastructure Engineer experienced in scaling Ruby on Rails applications, with a passion for optimization and performance improvements. You bring a strong background in Site Reliability and Infrastructure Engineering for Rails applications. You follow Agile and DevOps principles, can effectively influence teams to achieve goals, and demonstrate excellent problem-solving skills in our fast-paced environment.

Your Impact Manage cloud infrastructure using Infrastructure as Code. Manage and scale a Ruby on Rails stack. Implement monitoring tools to improve observability. Perform code review of new features to ensure they meet performance requirements. Debug production issues across all levels of the stack. Plan for the growth of, optimize, and automate Fleetio’s Infrastructure.

Your Experience 5+ years of AWS Experience. 3+ years Kubernetes Experience. Experience with Ruby on Rails or an equivalent web application framework. Expert at profiling and benchmarking source code. Effective at code review, and identifying potential performance problems before they reach production. Experience with Datadog or other APM tools. Excellent written and verbal communication skills. Be sure to mention “coffee” in your application so we know you actually read this. Considered a Plus Infrastructure as Code tools (Terraform). Deep understanding of cloud network fundamentals (routing, firewalls, load balancers, CDNs, VPCs, etc.). Experience with distributed event and data stores, such as Kafka, Redis, Elasticsearch, Memcached, and TimescaleDB. You know a thing or two about the fleet management industry.