Senior DevOps Engineer

Tenna is a company focused on revolutionizing construction equipment fleet operations through innovative solutions. They are seeking a Senior DevOps Engineer to take ownership of the infrastructure for their platform, ensuring reliability and cost-efficiency while shaping the DevOps function towards a better developer experience.

Responsibilities:

• Build and evolve the platform function rather than just keep it running by taking on the reconstruction and platform work already scoped, bringing more of the environment under code and under clear ownership, and shaping how DevOps grows toward platform and developer experience
• Own the uptime of our production platform. Lead incident response when systems degrade or fail, drive root cause analysis, and follow through with the fixes and safeguards that keep the same failure from recurring, including on-call practices, runbooks, and blameless postmortems
• Own metrics, monitoring, alerting, and tracing across the stack so the system surfaces problems before customers feel them
• Build dashboards and alerts that are actionable rather than noisy, and extend coverage as new services ship
• Manage, improve, and extend our AWS environment, anchored on EKS, RDS/Aurora, and networking
• Operate our AWS environment with sound judgment regarding scalability, redundancy, cost, and fault tolerance, and keeps it secure
• Operate and upgrade our EKS clusters. Deploy and scale workloads, manage version upgrades, tune for reliability and cost, and troubleshoot cluster and workload issues
• Keep our databases and messaging layer healthy and performant, including PostgreSQL on RDS/Aurora and our message broker
• Diagnose degraded performance across data, messaging, and network paths
• Define and manage infrastructure as code so every change is repeatable and reviewable. We build with AWS CDK in JavaScript/TypeScript; you will extend the existing stacks and bring more of the environment under code over time
• Own the pipelines engineers rely on, primarily in GitHub Actions. Find and remove bottlenecks that slow engineering down, whether slow deploys, flaky pipelines, or scaling chokepoints, and build tooling engineers actually trust
• Own how tracker data moves from equipment in the field through cellular tunnels and our AWS networking into the platform. Ensure pathways are reliable, secure, and observable
• Monitor and analyze AWS spend, identify savings opportunities, and bring clear recommendations and trade-offs to engineering leadership on a regular cadence
• Document the systems you own and distribute that knowledge across the team so the function never depends on one person

Requirements:

• 5+ years in platform, infrastructure, DevOps, or SRE roles, including recent experience as a senior individual contributor who has owned production systems end to end
• Substantial hands-on experience running production infrastructure on AWS
• Hands-on production experience operating container-orchestrated workloads: deploying, scaling, upgrading, and troubleshooting them
• Experience operating managed relational databases in production, including diagnosing and resolving performance problems
• A solid grasp of VPCs, subnets, routing, and DNS, and how traffic actually flows between systems
• Proficiency writing infrastructure as code and the automation around it. You write your infrastructure rather than click it
• A proven ability to ramp quickly on unfamiliar systems and reach a working understanding without step-by-step direction
• Genuine curiosity about how systems work, down to the underlying mechanics rather than treating them as black boxes
• A strong sense of ownership: you understand, improve, and stand behind the systems in your care
• Communicates risks, decisions, and progress proactively, and can make technical and cost trade-offs clear to people who are not infrastructure experts
• Documents while building and shares knowledge, so no single person, including you, becomes a point of failure
• Sound judgment about change safety: moves quickly on work that is safe and reversible, and vets larger or riskier changes before making them
• A bachelor's degree in a relevant field, or equivalent hands-on experience is required
• Experience with AWS CDK in JavaScript/TypeScript, GitHub Actions, distributed messaging, caching, or search is preferred