Member of Technical Staff, Backend

• Voice AI that resolves, not transfers.
• Most phone systems trap callers in menus and scripts. Vapi is the platform for deploying voice agents that know your business and can listen, adapt, and resolve in minutes.

• 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

MEMBER OF TECHNICAL STAFF, BACKEND

WHY WE’RE HIRING THIS ROLE

• 1M+ developers and 2.7M+ agents are built on our product surface.
• Every assistant lives in our dashboard: Composer, Simulations, Monitoring, Knowledge Base, Versioning, Deployments. Non-deterministic systems, real-time call observability, eval loops, and a builder UX that has to feel like magic.
• We’re shipping the loops that take an agent from "demo" to "live in production for the Fortune 500."
• It's freakin hard and a lot of fun.

WHAT YOU’LL DO

First 30 Days

• Make real calls. Build real assistants on Vapi across our main provider integrations (LLMs, STT, TTS, telephony). Get a working mental model of the platform end to end.
• Ship your first product feature into customer hands.

By 60 Days

• Own a product area outright within the agent self-improvement loop or the trust and guardrails platform.
• Drive a feature from spec to ship with PM and design, including the eval and rollout loops.
• Use AI coding agents (Claude Code, Cursor, or similar) as a serious lever on your throughput.

By 90 Days

• Operate as a full peer to engineers on the team, owning your area without handholding.
• Run the agent improvement loop end to end in your domain: authoring, evaluation, deployment, observation, iteration.
• Be a core voice in product decisions, with multiple shipped features on your watch.

WHO YOU ARE

Must-Haves

• 5+ years building product, with 2+ at an early-stage company.
• Strong full-stack engineer, fluent in TypeScript, React, and a Node-based backend.
• Track record shipping beautiful product surfaces that customers love and competitors copy.
• Product instinct. You read a half-formed problem and figure out the right shape before someone hands you a spec.
• Daily use of AI coding agents (Claude Code, Cursor, or similar) with opinions about where they help and where they don't.
• Self-directed. You read the PR, open the product, and start building without waiting on permission.
• Customer empathy and a bias for action: you ship, you own outcomes, and you care what users actually experience.

Nice-to-Haves

• Background in voice AI, conversational AI, LLM applications, or telephony.
• Worked on a developer-facing product (APIs, SDKs, dashboards) where the audience is technical.
• You've built your own startup, or shipped a side project people actually use.
• Open-source contributions or public writing on engineering, design, or product practice.

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: Peak XV (Series B), Kleiner Perkins, M12, Bessemer, YC.

WHAT WE OFFER

• Real stake: 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.