About the role
We are looking for a Senior Software Engineer (Infrastructure) with 6+ years of experience to own the application code that controls Motion's cloud infrastructure – specifically the always-on, per-customer virtual environments that power our AI agent platform. This is not a traditional DevOps or SRE role – we need a developer-first engineer who is 60% backend and 40% infrastructure, someone who fell into infra because they were the first engineer at a startup and owned everything. You'll be joining two intense, high-output engineers building something novel – persistent cloud environments at scale with no real playbook. The ideal candidate is deeply passionate about AI, has shipped production code end-to-end at early-stage startups, and thrives in a high-bar, high-ownership environment.
What you will be doing
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Writing the application code that manages VM lifecycle, container updates, queues, observability, and security for Motion's always-on customer environments – scaling from ~500 to 2,000–3,000 environments in the coming weeks
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Designing and shipping reliable abstractions around messaging queues, locks, background tasks, and service bus mechanics that product engineers can build on
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Evolving infrastructure-as-code patterns in Pulumi – defining standards other engineers follow
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Working deep in Linux systems, containers, networking, persistent storage, permissions, and runtime debugging
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Collaborating on a small, high-ownership cross-functional team with weekly shipping cycles – moving fast on a problem with no existing playbook
