Staff Software Engineer, Infrastructure

Decagon is seeking a Staff Infrastructure Engineer to design, build, and operate production infrastructure for high-scale, low-latency systems. You’ll own critical services end-to-end, improve reliability, and create paved paths that let every Decagon engineer ship confidently.

What youll do

• Design and implement critical infrastructure services with strong SLOs, clear runbooks, and actionable telemetry.
• Partner with research and product teams to architect solutions, set up prototypes, evaluate performance, and scale new features.
• Tune service latencies: optimize networking paths, apply smart caching/queuing, and tune CPU/memory/I/O for tight p95/p99s.
• Evolve CI/CD, golden paths, and self‑service tooling to improve developer velocity and safety.
• Support various deployment architectures for customers with robust observability and upgrade paths.
• Lead infrastructure‑as‑code (Terraform) and GitOps practices; reduce drift with reusable modules and policy‑as‑code.
• Participate in on‑call and drive down toil through automation and elimination of recurring issues.

What Decagon is looking for

• 8+ years building and operating production infrastructure at scale.
• Strong CS fundamentals; deep expertise in at least one area across Core/Data/AI‑ML/Platform/Voice, with curiosity to learn the rest.
• Proven track record meeting high availability and low latency targets (owning SLOs, p95/p99, and load testing).
• Proficiency in Python; excellent observability and incident response skills (OpenTelemetry, Prometheus/Grafana, Datadog; PagerDuty; SLO/error budgets).
• Clear written communication and the ability to turn ambiguous requirements into simple, reliable designs.
• Strong Kubernetes experience (GKE/EKS/AKS) and multi‑cloud experience (GCP, AWS, Azure).
• Experience with infrastructure‑as‑code using Terraform and GitOps practices.
• Experience with customer‑managed deployments.
• Willing to work on‑site in San Francisco 5 days a week.