Vision

We're creating the shift to voice as humanity's default interface. Why voice? Because voice captures the nuance, the emotion, and the humanity of interactions in ways text alone can't: voice makes technology human again.

Mission

We're building the platform for the future of voice technology. Our market edge is extensible, reliable infrastructure designed for the full complexity of voice interactions. 18 months, 150k developers, adding 1000 every day. Give it a try here

The Role

The Senior Backend Engineer will own features end-to-end from customer requests to their deployment, building on a modular API-first architecture, working within real-time low-latency constraints. You’ll also be a foundational part of how we build the culture at Vapi. 

Outcomes

1. Own and deliver entire features + projects

   • Ship a pre-scoped feature within the first 7 days

   • Ship a feature independently within the first 30 days

2. Ship optimizations and refactors

   • Ship a pre-scoped optimization or refactor within the first 14 days

     1. Ex. improve the latency of a component of the speech-to-speech pipeline

   • Ship an optimization independently within the first 30 days

     1. Ex. refactor a tool-calling mechanism to make it more deterministic

3. Talk to customers

   • Receive a request from Support team and ship the fix within the first 14 days

   • Pick up customer threads unprompted, investigate and solve within the first 14 days

4. Build things that delight customers

   • Unprompted, delight a customer within the first 30 days (ex. call analytics endpoint)

Competencies

• Experience with Typescript + Node or similar backend framework

• Communication: You can clearly articulate what you’re thinking and feeling

• Cracked-ness: You’re more cracked than the most cracked person on the team

• Startup Ready: You have a reason to be here and can make sacrifices for something uncertain

• Founder Juice: New ideas come from you, you build it yourself or annoy everyone until it’s done ;)

Qualifications:

• Previous Founding/Senior/Staff/Principal Engineer

• 1+ years of experience at company <100 ppl

• 5+ years experience in Full-Stack / Backend Software Engineering