Backend Engineer - Node.js (Voice AI Platform)

Phonio.ai is the first Voice AI platform built for business operations, not developers. We help marketers, e-commerce teams, and customer service departments integrate AI-driven voice interactions seamlessly into their workflows.

• Develop and maintain APIs (REST, WebSockets, gRPC) to handle real-time voice interactions.
• Integrate telephony APIs (Twilio, Plivo, Vonage) for call automation and customer engagement.
• Implement AI-driven voice workflows by integrating OpenAI GPT-4, Claude, Gemini.
• Optimize database performance in MongoDB, ensuring low-latency query execution.
• Ensure high availability and scalability using AWS services, Kubernetes, and Docker.
• Work with real-time data processing for speech recognition (ASR) and text-to-speech (TTS).
• Implement authentication and security best practices (OAuth, JWT, rate limiting).
• Collaborate with frontend and AI engineers to create seamless voice automation workflows.

• 3+ years of experience in backend development using Node.js.
• Strong experience with REST, WebSockets, and gRPC APIs.
• Hands-on experience with MongoDB, including indexing and optimization.
• Experience integrating LLMs (OpenAI, Claude, Gemini) into backend workflows.
• Familiarity with telephony APIs (Twilio, Plivo, etc.).
• Strong knowledge of AWS.
• Experience with Docker & Terraform (good to have).
• Understanding of real-time systems & event-driven architecture.

• Knowledge of AI model fine-tuning & inference optimization.
• Previously having experienced 0-1 journey of an AI product.

• Work on the future of voice AI, transforming how businesses communicate.
• Opportunity to shape a rapidly growing industry in AI-driven voice automation.
• Collaborate with a team that values innovation, scalability, and real-world impact.
• Gain hands-on experience working with state-of-the-art AI models and cloud infrastructure.

If you're excited about building AI-powered voice automation at scale, we'd love to hear from you. Apply now by sending an email at hr@phonio.ai