
Rust
Python
Kubernetes
Staff Platform Engineer
Overview
Postscript is the AI messaging platform trusted by 20,000+ Shopify brands — including Brooklinen, Ruggable, True Classic, and Dr. Squatch. With a mission to make SMS your number one revenue driving channel, we built the best-in-class SMS marketing platform and launched revenue-driving AI features not available on any other platform.
Job Description
We are seeking an experienced Staff Platform Engineer to help build and operate Acorn, Postscript's next-generation CDP and messaging platform: ~52 Rust/Python services on EKS, built to run at 500K+ events/sec for 20K+ merchants.
Responsibilities
- - Own infra topology, scaling and blast-radius boundaries, the build/deploy graph, database ownership boundaries, and cost ceilings
- - Build the validation gates, idempotency checks, drift detectors, and runbooks that keep both humans and agents from doing damage
- - Diagnose the novel failures — consumer lag, DLQs, materialized-view chains, consent ordering
- - Own the 500K events/sec target: load testing, Karpenter/HPA tuning, Database sizing, SLOs and alerting
- - Own IAM/IRSA, secret rotation, the auth chain, and what the agent/MCP surface is allowed to do
- - Keep skills, runbooks, and agent context in sync with reality
- - Lead incidents and capture every fix as a new runbook plus regression test
Required Skills
- - 5+ years operating production Kubernetes and cloud infrastructure (AWS) at scale
- - Strong Terraform and GitOps/Kustomize practice, with a bias for making operations idempotent, automated, and self-verifying
- - Real incident-response experience on distributed-systems failures — databases, streaming, consumer lag, data integrity
- - Knowledge of how Postgres, a columnar store, and a log/streaming bus behave under load
- - Comfort working alongside AI agents — writing the guardrails, runbooks, and checks that let automation operate safely
- - Instincts to encode checks rather than relying on memory
Benefits
- - Salary range of USD $190,000 to $230,000 base plus significant equity
- - High growth startup - plenty of room for you to directly impact the company and grow your career!
- - Work from home (or wherever)
- - Fun - We’re passionate and enjoy what we do
- - Competitive compensation and opportunity for equity
- - Flexible paid time off
About the company
Engage with customers wherever they are. Postscript helps you build strong customer relationships across the entire buying experience.
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