About the role
As a Senior Full-Stack Engineer, you’ll shape the heart of Retell AI’s voice automation platform, building scalable systems and intuitive interfaces that power millions of AI-driven conversations. You’ll work across the stack – leveraging React, TypeScript, and Node.js – to deliver fast, beautiful, and reliable solutions. Collaborating closely with the founding team, you’ll bridge backend architecture (like prompt orchestration and telephony integrations) with frontend experiences (such as dashboards and analytics tools), ensuring seamless customer onboarding and impactful user experiences. This high-impact role offers rapid feedback loops, customer collaboration, and the opportunity to define a category-leading product that transforms global communication.
Key responsibilities:
- Develop core features like prompt orchestration, dashboards, analytics, and telephony integrations.
- Build scalable full-stack systems, from polished UIs to robust APIs and DevOps workflows.
- Lead projects from architecture to production, owning coding, deployment, and iteration.
- Create intuitive interfaces and APIs, enabling customers to activate in hours.
- Support customer onboarding, debug issues, and turn feedback into product enhancements.
About Retell AI
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 $80M 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.
- We’re a top 50 AI app in a16z list: https://tinyurl.com/5853dt2x
- #4 on Brex's Fast-Growing Software Vendors of 2025: https://www.brex.com/journal/brex-benchmark-december-2025
- We're also one of the top ranking startups on: https://leanaileaderboard.com/
- Enterprise tech 30: https://www.wing.vc/et30/overview
Required skills
Other roles at Retell AI
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Job details
Salary
$215,000 - $290,000
Location
Redwood City, United States
Experience
5+ years
Funding
Total raised
$5.1M
Last stage
Seed
Investors
What happens next.
No applications, no recruiter spam. Just the intro.
Confirm the fit
A few questions to make sure this role is the right shape for you. Two minutes.
I pitch you to the company
I write the intro, send it to the founder, and handle the back-and-forth.
A meeting lands on your calendar
If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.