Member of Technical Staff Company: Confidential — venture-backed technology company Location: San Francisco, CA (Union Square office, 5 days per week) Compensation: $160,000 - $220,000 + competitive equity Employment Type: Full-time Visa Sponsorship: Not available About the Company The client builds the simulation, observability and self-improvement layer for Voice AI agents. Within a year of launch, Google, DoorDash, public healthcare companies, public banks, drive-through chains and enterprises on five continents use it, and it handles millions of calls a month. Founders Faraz and Rohan built infrastructure for Microsoft Copilot and AWS Bedrock before starting the client. The company raised a $4M seed in 2025 from Floodgate, Peak XV and Y Combinator, has sustained seven-figure revenue since, and is a team of about 10 in Union Square, San Francisco. The Role As a Member of Technical Staff you will build systems that simulate, analyze and evaluate conversational AI agents across voice and multimodal, on resilient AWS infrastructure that handles millions of real-time conversations. This is a high-bar, full-ownership role on a tiny team, and it is customer-facing: you will work on-site with customers to build, sell and deploy the product. What You Will Do • Architect and develop simulation, analysis and evaluation systems for conversational AI. • Build resilient, scalable AWS infrastructure (Lambda, EC2, WebSockets, SIP) for real-time conversations. • Build algorithms and pipelines that surface insights, detect failure modes and keep agents safe and aligned. • Own your work fully, across the stack. • Work on-site with customers to deploy the product. What You Bring • 1+ years of experience • Proficiency across the stack, especially databases, AWS and AI engineering • Obsessive attention to detail and the ability to lead technical execution • An exceptional signal: a strong bachelor's degree and/or experience at a top fast-growing startup • Strong, personable communication for customer-facing work • Ability to work in person in San Francisco 5 days a week Nice to Have • High-traffic features built at scale • A highly optimized AI-assisted developer workflow • Technical lead experience Benefits Health insurance, 401(k), gym membership, free lunch, and a Union Square office. Tech Stack Python, FastAPI, Supabase, Redis, AWS, WebSockets, CI/CD; ML and LLMs; LiveKit, Deepgram, Cartesia, ElevenLabs, Gemini; Sentry, PostHog, Grafana, Datadog Before you apply: get a free recruiter-readiness score for your resume at CareerStanding — about a minute, no signup, and your resume stays in your browser.