Job Details

About Decagon

Decagon is the leading conversational AI platform empowering every brand to deliver concierge customer experience. Our AI agents provide intelligent, human-like responses across chat, email, and voice, resolving millions of customer inquiries across every language and at any time.

Since coming out of stealth, Decagon has experienced rapid growth. We partner with industry leaders like Hertz, Eventbrite, Duolingo, Oura, Bilt, Curology, and Samsara to redefine customer experience at scale. We've raised over $200M from Bain Capital Ventures, Accel, a16z, BOND Capital, A*, Elad Gil, and notable angels such as the founders of Box, Airtable, Rippling, Okta, Lattice, and Klaviyo.

We're an in-office company, driven by a shared commitment to excellence and velocity. Our values-customers are everything, relentless momentum, winner's mindset, and stronger together-shape how we work and grow as a team.

About the Team

The Infrastructure team builds and operates the foundations that power Decagon: networking, data, ML serving, developer platform, and realtime voice. We partner closely with product, data, and ML to deliver highscale, lowlatency systems with clear SLOs and great developer ergonomics.

We organize around five focus areas:

• Core Infra: The foundational cloud stack-networking, compute, storage, security, and infrastructureascode-to ensure reliability, scale, and cost efficiency.
• Data Infra: Streaming/batch data platforms powering analytics/BI and customerfacing telemetry, including for customermanaged and onprem environments.
• ML Infra: GPU and modelserving platforms for LLM inference with multiprovider routing and support for onprem/airgapped deployments.
• Platform (DevEx): CI/CD, paved paths, and core services that make shipping fast, safe, and consistent across teams.
• Voice Infra: Telephony/WebRTC stack and observability enabling ultralowlatency, highquality voice experiences.

Our mission is to deliver magical support experiences - AI agents working alongside humans to resolve issues quickly and accurately.
About the Role

We're hiring a Senior Infrastructure Engineer to design, build, and operate production infrastructure for highscale, lowlatency systems. You'll own critical services endtoend, improve reliability and performance, and create pavedpaths that let every Decagon engineer ship confidently.
In this role, you will

• 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 selfservice tooling to improve developer velocity and safety.
• Support various deployment architectures for customers with robust observability and upgrade paths.
• Lead infrastructureascode (Terraform) and GitOps practices; reduce drift with reusable modules and policyascode.
• Participate in oncall and drive down toil through automation and elimination of recurring issues.

Your background looks something like this

• 6+ years building and operating production infrastructure at scale.
• Depth in at least one area across Core/Data/AIML/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).
• Excellent observability chops (OpenTelemetry, Prometheus/Grafana, Datadog) and incident response (PagerDuty, SLO/error budgets).
• Clear written communication and the ability to turn ambiguous requirements into simple, reliable designs.

Even better

• Experience being an early backend/platform/infrastructure engineer at another company
• Strong Kubernetes experience (GKE/EKS/AKS) and experience across multiple cloud providers (GCP, AWS, and Azure)
• Experience with customermanaged deployments

Benefits

• Medical, dental, and vision
• Flexible time off
• Daily lunch/dinner & snacks in the office