We are looking for a Senior Software Engineer, Infrastructure with ideally 5+ years of experience to own and evolve the build, release, and runtime foundations at a fast-scaling voice AI company. You'll design and automate deployment pipelines across cloud SaaS and on-prem environments, orchestrate containers at scale, and ensure reliable, compliant releases. This is a high-impact role where you'll be the responsible adult in production – working cross-functionally with product, security, and customer teams to turn real-world learnings into reusable platform capabilities. If you thrive in ambiguity, move fast, and want to shape infrastructure from the ground up at a company growing from $5M to $36M ARR in a single year, this is the role for you.
What you will be doing
Retell AI is using first principles to reimagine the call center with cutting-edge voice AI.
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 $60M ARR with a team of 40 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.
Salary
$200,000 - $300,000
Location
Redwood City, United States
Experience
5+ years
Total raised
$4.6M
Last stage
Seed
Investors
No applications, no recruiter spam. Just the intro.
A few questions to make sure this role is the right shape for you. Two minutes.
I write the intro, send it to the founder, and handle the back-and-forth.
If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.