Senior Software Engineer, Backend

ABOUT THE ROLE

As a Senior Backend Engineer, you’ll shape the core systems powering millions of AI-driven conversations. You’ll tackle real-time audio, global telephony, and developer tooling, working across the stack with the founding team. This high-impact role offers rapid feedback loops, customer collaboration, and the chance to define a category-leading product.

• Build foundational architecture for Retell’s platform, such as prompt orchestration, testing frameworks, observability dashboards, and telephony integrations.
• Design scalable backend systems and Dev Ops workflows for reliable performance across millions of calls.
• Lead complex projects from architecture to production, driving delivery and monitoring.
• Collaborate with product and design teams to create intuitive APIs and interfaces for quick customer onboarding.
• Support customer onboarding, troubleshoot issues, and turn feedback into product improvements.

• Have 2+ years of backend development experience and a strong foundation in CS fundamentals (CS/CE/EE degree or equivalent).
• Have worked on scalable, high-performance backend systems — especially anything involving concurrency, data, storage, or distributed components.
• Take ownership like a founder and enjoy building core systems that need to be fast, reliable, and correct.
• Thrive in fast-moving, ambiguous environments where you learn quickly and solve new technical problems.
• Communicate clearly, collaborate well across teams, and move work forward with momentum.
• Have startup experience or the grit to operate in a high-velocity environment — bonus points if you’ve worked on infrastructure, databases, or large-scale backend systems.

• Cash: 200k - 300k
• Equity :
  Offer Equity
• Location :
  Redwood City, CA, US
• 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 Door Dash 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