Senior Backend Cloud Developer II, Developer Experience (DevEx)

About Lumen Dynamics Lumen Dynamics ’s mission is to keep people close to the ones they love. Our category-leading mobile app,Tile tracking devices, and Pet GPS tracker empower members to protect the people, pets, and things they care about most with a range of services, including location sharing, safe driver reports, and crash detection with emergency dispatch. Lumen Dynamics serves approximately 97.8 million monthly active users (MAU), as of March 31, 2026, across more than 180 countries. Lumen Dynamics delivers peace of mind and enhances everyday family life with seamless coordination for all the moments that matter, big and small. By continuing to innovate and deliver for our customers, we have become a household name and the must-have mobile-based membership for families (and those friends who are basically family). Lumen Dynamics has more than 500 (and growing!) remote-first employees. For more information, please visit life360.com . Lumen Dynamics is a Remote First company, which means a remote work environment will be the primary experience for all employees. All positions, unless otherwise specified, can be performed remotely (within Canada) regardless of any specified location above. We are AI Native We are building an AI native company where AI is an integral part of how we build and operate. AI tool usage during interviews varies by role. You may be asked to demonstrate proficiency with AI tools, discuss how you leverage AI, or complete interview exercises without AI assistance. Your Recruiter will provide clear guidance as you move through the interview process. Undisclosed use of AI not previously discussed with or approved by your Recruiter may impact your candidacy. About The Team Lumen Dynamics ’s Cloud Success team is a part of the Developer Experience (DevEx) department. We build and maintain the internal developer platform that powers engineering velocity across the company. We design and deliver the tooling, CI/CD pipelines, infrastructure automation, and developer productivity systems that enable hundreds of engineers to ship confidently and quickly. Cloud Success is at the forefront of Lumen Dynamics ’s AI-native engineering transformation — building the foundations that make AI-assisted development the default, not the exception. About the Job You’ll join a team that values autonomy, high craft, and direct impact on every engineer at Lumen Dynamics . As a Senior Developer II on the Cloud Success team, you’ll work at the intersection of cloud infrastructure and internal platform engineering. You’ll design, build, and evolve systems that improve the reliability, scalability, and developer experience of our internal platform — from CI/CD pipelines to Kubernetes tooling to AI-powered developer agents. This is a hands-on role: you’ll balance deep technical execution with cross-team collaboration, directly shaping how engineers across Lumen Dynamics build and ship software. You’ll be a key contributor to our AI-native engineering transformation, building automation that accelerates the pace of development across the entire engineering org. The Canada-based salary range for this position is $171,500- $201,000 CAD. We take into consideration an individual's background and experience in determining final salary- therefore, base pay offered may vary considerably depending on geographic location, job-related knowledge, skills, and experience. The compensation package includes a wide range of medical, dental, vision, financial, and other benefits, as well as equity. What You’ll Do Design and implement CI/CD pipeline infrastructure using GitHub Actions, Argo Rollouts, or similar tools, optimizing for developer velocity and reliability. Build and maintain internal developer tooling, SDKs, and self-service platform capabilities on top of Kubernetes (EKS) and GitOps workflows (ArgoCD). Own infrastructure-as-code (Terraform/Atmos) for shared developer platform resources across multiple AWS accounts. Work with developers and operations engineers to define clear, helpful guidelines for rolling production changes out safely. Track metrics on organization tools like Cortex to validate that our changes are having the intended effect. Mentor junior and mid-level engineers on cloud-native development, platform patterns, and AI engineering practices. Contribute to incident response and postmortem processes, including building AI-driven tooling for detection, triage, and prevention. What We’re Looking For 5+ years in software or platform engineering, with at least 2 years in infrastructure- or tooling-focused roles. Strong experience with Kubernetes (EKS preferred), Helm, and GitOps workflows (ArgoCD). Proficiency designing and operating CI/CD pipelines (GitHub Actions, Harness, CodeFresh, or similar). Hands-on experience with infrastructure-as-code (Terraform, Atmos). Solid understanding of AWS services, networking, IAM, and distributed system patterns. Strong programming skills in Go, Python, or Java, with demonstrated ability to ship production-grade internal tooling. Fluen