Senior Backend Engineer

Responsibilities

• Build and maintain Python-based state systems for real-time voice AI conversations
• Integrate and orchestrate multiple LLM providers, including prompt design and tool calling
• Write clean, high-performance Python code using asyncio and OOP
• Develop automated tests and validation suites for agent logic
• Monitor production systems, debug agent behavior, and improve reliability
• Implement metrics, logging, and alerting for high availability
• Design database schemas and optimize SQL and NoSQL queries
• Build authentication, authorization, and microservices-based architectures

Requirements

• 5+ years of Python experience
• Experience writing async web apps using FastAPI
• Proficiency with testing frameworks
• Understanding of LLMs, APIs, Cloud, and CI/CD pipelines
• Knowledge of software architecture and security practices
• Experience with AWS and Kubernetes
• Strong technical and communication skills

About the Company

Phonely is building the future of voice AI, creating agents that allow businesses to handle phone interactions seamlessly. We are a high-intensity, builder-focused team of ex-athletes and founders dedicated to solving complex voice AI problems.