Our client is building a conversational AI platform that automates phone calls, campaigns, and real-time call analytics.

They are looking for a Senior Backend Developer or backend-focused Full-Stack Developer to build integrations with third-party APIs and support the continued development of their multi-tenant SaaS platform.

Responsibilities * Build and maintain backend services using Type

Script and NestJS * Integrate third-party APIs, SDKs, and webhooks * Design and maintain REST APIs * Work with PostgreSQL, TypeORM, and database migrations * Integrate OpenAI, Speech-to-Text, and Text-to-Speech services Requirements * 5+ years of software development experience * Strong Type

Script and NestJS experience * Strong PostgreSQL and TypeORM knowledge * Experience with REST APIs and third-party integrations * Experience with multi-tenant SaaS platforms * Understanding of LLM workflows and OpenAI integrations * Experience using AI coding tools such as Cursor, Copilot, or Claude Code * Ability to work independently with minimal supervision Nice to Have * Vue 3 * Twilio, Vapi, WebRTC, or Eleven

Labs * Stripe integrations * BullMQ, pg-boss, or similar background job tools #J-18808-Ljbffr

📌 B Backend Engineer (España)
🏢 HartleyCo
📍 España