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 TypeScript and NestJSIntegrate third-party APIs, SDKs, and webhooksDesign and maintain REST APIsWork with PostgreSQL, TypeORM, and database migrationsIntegrate OpenAI, Speech-to-Text, and Text-to-Speech servicesRequirements
5+ years of software development experienceStrong TypeScript and NestJS experienceStrong PostgreSQL and TypeORM knowledgeExperience with REST APIs and third-party integrationsExperience with multi-tenant SaaS platformsUnderstanding of LLM workflows and OpenAI integrationsExperience using AI coding tools such as Cursor, Copilot, or Claude CodeAbility to work independently with minimal supervisionNice to Have
Vue 3Twilio, Vapi, WebRTC, or ElevenLabsStripe integrationsBullMQ, pg-boss, or similar background job tools
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📌 b Backend Engineer (Madrid)
🏢 HartleyCo
📍 Madrid