About the role
Infrastructure Engineer
We move terabytes of campaign and engagement data, and you'd own the foundation it all runs on.
About JustAI
We're a YC-backed team building the AI platform that runs marketing for the world's best companies. Marketers describe a campaign in plain language, and our platform turns it into running code that generates, tests, and executes personalized messaging across email and push at scale.
The founders
We were at X during the Elon takeover. I had to rewrite the backend infrastructure that now powers the core user and tweet services. You'll get to work closely with us.
The role
You'll own the foundation everything runs on: the large-scale data pipelines that feed our analytics and models, the compute and storage substrate, and the reliability, observability, and cost of the whole system. This is an early, high-ownership role. You'll be building a lot from 0→1 and owning it end to end as we scale.
What you'll do
- Own and scale our data infrastructure, including large-scale batch and streaming pipelines, warehouse design, and the storage layer behind them.
- Run and harden our compute platform: orchestration, autoscaling, resource isolation, and deployment of containerized workloads.
- Own the observability and reliability backbone (metrics, tracing, alerting, SLOs) and drive down both incidents and cost.
- Tackle the lowest-level scaling problems: data partitioning, throughput, query and scan cost, and distributed-systems failures at volume.
- Accelerate how quickly other engineers can ship code safely.
What we're looking for
- 5+ years in infrastructure, SRE, or data platform roles, with hands-on experience building and operating large-scale systems at a low level.
