Staff Engineer, Platform & Systems

ABOUT RETELL AI

Retell AI is using the first principles to reimagine the call center with cutting edge voice AI.

Since launching 18 months ago, thousands of companies now utilize Retell’s AI voice agents to handle sales, support, and logistics calls that once required large teams of human agents. Backed by Y Combinator, Alt Capital, and other leading investors, we have scaled to $36M ARR with a team of 20 people, up from $5M at the start of 2025.

Our vision for 2026 is to build a modern CX platform where entire contact centers are powered by AI. Instead of basic automation that needs constant human tuning, we’re creating intelligent AI “workers” that can act as frontline agents, QA analysts, and managers — continuously executing, monitoring, and improving customer interactions.

We’re growing quickly and looking for ambitious builders who want to tackle hard technical problems, move fast, and have real impact at one of the fastest-growing voice AI startups.

Let’s build the future together.

- We’re a top 50 AI app in a16z list:

- #4 on Brex's Fast-Growing Software Vendors of 2025:

- We're also one of the top ranking startups on:

THE ROLE

We’re looking for a Principal/Staff Engineer to help own the technical direction of our core platform. This is a staff-level IC role for someone who thrives in ambiguity, moves fast, and raises the bar for everyone around them.

You’ll work across systems, infrastructure, and product surfaces — partnering closely with engineering, product, and leadership to scale what’s already working and build what’s next.

This is not a “ticket taker” role. You’ll define problems, design solutions, and ship.

KEY RESPONSIBILITIES

- Own the design and evolution of core platform and systems architecture.

- Lead complex technical initiatives end-to-end, from concept to production.

- Make high-leverage technical...