Senior Infrastructure Engineer - AI

Senior Infrastructure Engineer Location: On-site, San Francisco, CA (3 days/week in office) Salary: $150k - $200k + equity Industry: AI, Cloud Infrastructure What You'll Drive Join a fast-growing AI startup backed by $65M from top VCs (Scale Venture Partners, Y Combinator, Emergence, and founders of Twilio, Affirm, ElevenLabs). As a Senior Infrastructure Engineer, you'll architect and scale distributed systems that power millions of real-time, AI-driven phone conversations for major brands and enterprises. Your work will directly impact platform reliability, ML inference performance, and the future of enterprise telephony. You'll tackle challenges at the intersection of cloud infrastructure, telephony, and machine learning - building systems that handle high-throughput, low-latency workloads and integrating with enterprise-grade voice and video systems. This is a high-impact role with direct influence on product, technology, and company trajectory. What You'll Focus On Architect and build distributed systems using Kubernetes and AWS for real-time voice processing Design and optimize ML infrastructure for training and inference across multiple regions Integrate with complex telephony systems (SIP, VOIP, WebRTC) and enterprise phone networks Ensure reliability through robust monitoring, alerting, and incident response (Datadog) Anticipate and solve scaling challenges as call volume grows exponentially Implement security and compliance best practices for regulated enterprise customers Who You Are 3-6 years building and scaling distributed systems, with deep knowledge of cloud infra Experience at high-throughput social/fintech companies or fast-growing startups (Seed-Series C) Proven track record with high-volume, low-latency workloads, streaming, or real-time processing CS degree from a university in the US, Canada, or Europe Skilled in Kubernetes, AWS, Go, Datadog; experience with GPUs, ML infra, and real-time audio/video Background in telephony systems (SIP, VOIP, WebRTC) and/or security and compliance Tech Stack Kubernetes, AWS, Go, Datadog, GPUs, SIP, VOIP, WebRTC Why You'll Thrive Here Early-stage, high-impact role with direct product and technology influence Mission-driven: Transform how businesses interact with customers using AI Innovative, collaborative culture focused on hard problems in AI and automation Explosive traction: Millions of calls daily for major brands and enterprises High-growth: $65M raised from top VCs and industry leaders Elite founding team with deep AI, healthcare, and automation expertise Beautiful Jackson Square office with rooftop views and every tool you need Healthcare, dental, vision, and meaningful equity in a fast-scaling company Open to US Citizens, Green Card holders, and TN Visa holders only. Open Select