Customer Success Engineer

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 50 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 AI startups. Let's build the future together. - We're a top 50 AI app in the 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 - Top Ranking Startup: https://leanaileaderboard.com/ - Enterprise Tech 30: https://www.wing.vc/et30/overview ABOUT THE ROLE Retell AI powers AI voice agents for enterprise contact centers. We work with customers like CVS/Aetna, American Airlines, Lenovo, and Grab, helping them automate millions of customer conversations. We're hiring a Customer Success Engineer to help our enterprise customers successfully deploy and scale AI voice agents in production. You'll become the technical partner for our customers, helping design integrations, troubleshoot deployments, build AI workflows, and ensure customers are successful from onboarding through expansion. This role sits at the intersection of software engineering, customer success, and AI deployment. You'll work closely with Engineering, Product, and Customer Success while partnering directly with