Senior Software Engineer, Full Stack

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 $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. 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 on Wing VC.

Job Details

• Cash: $200k - $300k
• Equity: Offers Meaningful Equity
• Location: Redwood City, CA, US (100% Relocation Provided)
• US Visas: Retell AI is open to sponsoring work authorization for qualified candidates, including H1B/H-1B, TN, L-1, E-3, F-1 (OPT/CPT), and O-1 visas.
• Other Benefits:
• 100% coverage for medical, dental, and vision insurance
• $70/day DoorDash credit for unlimited breakfast, lunch, dinner, and snacks
• $200/month wellness reimbursement (gym, fitness classes, etc.)
• $300/month commuter reimbursement (gas, Caltrain, etc.)
• $75/month phone bill reimbursement
• $50/month internet reimbursement

Interview Process

• Intro Call (15-20min): Connect with our Founding Recruiter to get a deeper look at the team and the work you'd be doing.
• Technical Interview (60 min): Practical coding session focused on code fluency and system design (For frontend roles, we will focus on React-specific questions. For backend roles, we take a technology-agnostic approach.)
• Technical Interview (45 min): A system design-focused interview assesses your knowledge of building product-ready systems.
• Onsite/Virtual Interviews (2–3 hrs): Hosted in our office if located in the Bay Area or virtual, with three rounds:
• Practical Coding: Tackle real-world coding tasks with debugging.
• System Design: Architect a production-ready system.
• Existing codebase