Member of Technical Staff, Infrastructure

Vapi

The numbers: 1 billion calls. 1 million developers. 10x enterprise ARR growth

The customers: Amazon Ring, ServiceTitan, New York Life, Intuit, Kavak, and thousands more, from YC startups to the Fortune 500

The news: a $50M Series B led by Peak XV Partners, with Bessemer Venture Partners, Kleiner Perkins, M12 (Microsoft's Venture Fund), Y Combinator, and our earlier backers. Total raised: $72M

Why We’re Hiring

This Role

• Ramp on the cell-based architecture, the regional EKS clusters (backend / networking / persistence / monitoring / models / kafka), and the Pulumi stacks.
• Shadow oncall, walk recent incidents (Envoy response flags, conntrack drops, cross-zone LB target resets), and own a first scoped infra change end-to-end.
• Take ownership of one core domain — e.g., multi-region MSK (regional topic naming, Pulumi drift, compliance constraints), the Postgres/Neon consolidation path, or programmatic cluster creation via Cluster API.
• Ship a control-plane improvement in Go and drive a measurable reliability or capacity win.
• Lead a roadmap pillar of the cell-based build-out: a new region, a stateful workload migration, or unblocking the SIP gateway SPOF.
• Operate as the infra owner other teams pull in for design reviews, and set the standards (runbooks, failure-domain modeling, capacity targets) the next infra hires inherit.

Who You Are

• Ran multi-cluster Kubernetes on EKS in production — backend, networking, persistence, monitoring, models, and kafka clusters per region — and used Cluster API or similar for programmatic cluster creation.
• Operated a stateful data plane (Postgres, Redis, Kafka, Temporal, etcd, ClickHouse) at scale — sharded it, migrated data between instances, and lived with the consequences.
• Fluent in Envoy and Cilium/eBPF. Comfortable debugging Envoy response flags, conntrack drops, and cross-zone LB behavior. VPC/NAT/Cloudflare alone isn’t enough.
• Ran multi-region Kafka on MSK in production — not just Kafka. Dealt with regional topic naming, MSK Pulumi drift, and compliance constraints.
• Write Go for control-plane services. Vapi’s cluster-manager, traffic-control-plane, and environment-manager are all Go, and comfortable owning code in that stack.
• Bonus: SIP / RTP / telephony background. The Nov 7 SIP gateway SPOF is still unsolved, and a telephony-savvy infra hire unblocks that roadmap item.
• Bonus: cell-based / shard architecture experience — Shopify pods, AWS cell-based reference arch, Slack shards, or equivalent. Microservices experience alone isn’t the same.
• You likely come from one of: a company that ran cell-based in prod (Shopify, AWS service teams, Slack); a distributed systems shop (Cockroach, MongoDB, Confluent, Temporal, Redpanda, ClickHouse Inc.); a voice/video/CPaaS company (Twilio, Plivo, Bandwidth, Vonage, LiveKit, Daily.co, Dialpad); an Envoy/service-mesh org (Lyft, Stripe, Airbnb, Pinterest, Isovalent/Cilium); or a streaming-infra team (Confluent, Uber, LinkedIn, Datadog) that ran MSK/Kafka multi-region.

What You’ll Do

• 30 Day: Ramp on the cell-based architecture, the regional EKS clusters (backend / networking / persistence / monitoring / models / kafka), and the Pulumi stacks.
• Shadow oncall, walk recent incidents (Envoy response flags, conntrack drops, cross-zone LB target resets), and own a first scoped infra change end-to-end.
• 60 Day: Take ownership of one core domain — e.g., multi-region MSK (regional topic naming, Pulumi drift, compliance constraints), the Postgres/Neon consolidation path, or programmatic cluster creation via Cluster API.
• Ship a control-plane improvement in Go and drive a measurable reliability or capacity win.
• 90 Day: Lead a roadmap pillar of the cell-based build-out: a new region, a stateful workload migration, or unblocking the SIP gateway SPOF.
• Operate as the infra owner other teams pull in for design reviews, and set the standards (runbooks, failure-domain modeling, capacity targets) the next infra hires inherit.

Why Vapi

Generational impact: Build the human interface for every business

Ownership culture: 70% of the company are previous founders

Kind team: The founders, Jordan and Nikhil, are Canadians

Tier-1 Investors: YC, KP seed, Bessemer Series A

What We Offer

• Real stake: We offer a competitive salary and excellent equity ownership
• Comprehensive health coverage: medical, dental, and vision plans
• Team love: We love hanging out, and we do quarterly off-sites
• Flexible time off: take what you need
• More: catered meals, transportation, gym, and a $10k annual L&D budget