About the company
Retell AI is using first-principles thinking to reimagine the call center with cutting-edge voice AI. Thousands of companies now use 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've scaled to $80M in ARR with a team of 50, up from $5M at the start of 2025, and are now valued at over $1.5B.
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 act as frontline agents, QA analysts, and managers, continuously executing, monitoring, and improving every customer interaction.
We're growing fast and looking for ambitious builders who want to tackle hard technical problems, move quickly, and have a real impact on one of the fastest-growing voice AI companies in the world.
Responsibilities
- Design, build, and deploy production AI voice applications.
- Partner with customer engineering teams to integrate Retell APIs and SDKs.
- Develop custom workflows, automations, and conversational AI experiences.
- Help customers architect scalable AI systems for production.
- Debug production issues across APIs, webhooks, telephony, SIP, authentication, latency, and infrastructure.
- Investigate AI behavior and improve prompt quality, reliability, and performance.
- Work directly in customer codebases when needed.
- Own technical implementation from proof of concept through production launch.
- Lead technical onboarding for enterprise customers.
- Serve as the primary technical advisor during implementation.
- Guide customers on AI best practices, architecture, and deployment strategies.
- Help customers expand into new AI use cases across their organizations.
- Partner closely with Product and Engineering to improve the platform.
- Turn customer feedback into product improvements.
- Identify recurring customer pain points and propose scalable solutions.
- Help define best practices for deploying enterprise Voice AI.
Requirements
- Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, or a related technical field.
- 2+ years of software engineering or customer-facing technical experience building and deploying production applications.
- Strong programming skills in Python, TypeScript, or similar languages.
- Experience working with APIs, SDKs, and distributed systems.
- Excellent debugging and problem-solving skills.
- Strong communication skills and the ability to work directly with technical customers.
- Available to work standard U.S. business hours with overlap with our Pacific Time team and enterprise customers.
Conditions
- Cash: 180k - 300k
- Equity: Offers Meaningful Equity
- Location: Redwood City, CA, US - relocation provided
- US Visas: Retell AI is open to sponsoring work authorization for qualified candidates, including H-1B, TN, L-1, E-3, F-1 (OPT/CPT), and O-1 visas.
- 100% coverage for medical, dental, and vision insurance
- $70/day DoorDash credit