Founding Sales Engineer

ABOUT RETELL AI 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. Let's build the future together. Recent recognition: - No. 1 Best Places to Work in the Bay Area, San Francisco Business Times 2026 https://finance.yahoo.com/technology/ai/articles/voice-ai-startup-retell-ai-145200025.html - Top 50 AI Apps, a16z (2025) https://a16z.com/the-ai-application-spending-report-where-startup-dollars-really-go/ - #3 Fastest-Growing Software Company, G2 Best Software Awards 2026 https://company.g2.com/news/g2s-2026-best-software-awards - Best Agentic AI Software, G2 Best Software Awards 2026 https://www.retellai.com/blog/retell-ai-recognized-as-the-best-agentic-ai-software-by-g2 - #4 Fastest-Growing Software Vendor, Brex Benchmark 2025 https://www.brex.com/journal/brex-benchmark-december-2025 - Enterprise Tech 30 Class of 2026, Nasdaq & Wing VC https://www.nasdaq.com/videos/retell-ai - Top-Ranked Startup, Lean AI Leaderboard https://leanaileaderboard.com/ - Backed by Y Combinator https://www.ycombinator.com/companies/retell-ai ABOUT THE ROLE We are hiring a Founding Sales Engineer to help enterprise customers successfully adopt Voice AI from the first technical conversation through production deployment. You'll partner closely with Sales, Product, Engineering, and Retell's founders to design enterprise Voice AI solutions, build technical proofs of concept, and guide customers through technical validation. You'll become a trusted technical advisor to engineering teams, architects, and executives while helping shape how enterprises deploy AI-powered voice agents. This role sits at the intersection of sales engineering, solution architecture, applied AI, and enterprise software. You'll work directly with some of the world's largest companies to solve complex technical problems while influencing Retell's product roadmap through customer feedback. As one of our first Sales Engineers, you'll help define the function, build repeatable technical sales processes, and play a critical role in scaling one of the fastest-growing Voice AI platforms. KEY RESPONSIBILITIES TECHNICAL SALES & CUSTOMER DISCOVERY - Partner with Account Executives throughout the sales cycle, from discovery through production handoff. - Lead technical discovery sessions to understand customer architecture, business goals, and technical requirements. - Develop technical win strategies for strategic enterprise opportunities. - Present technical solutions to engineering teams, architects, and executive stakeholders. SOLUTION ARCHITECTURE & DESIGN - Design enterprise Voice AI solutions, including APIs, integrations, conversation architecture, security, and deployment strategies. - Translate customer requirements into scalable technical solution designs. - Recommend best practices for production deployments across enterprise environments. - Guide customers through architecture reviews and technical decision making. DEMOS & PROOF OF CONCEPTS - Build compelling demos, prototypes, and proof-of-concepts that demonstrate measurable business value. - Support customer pilots and technica…