Senior Full Stack / Backend Engineer - VOICEB.ai
hace 2 días
Murcia
Senior Full Stack / Backend Engineer — Voice & AI VoiceB | Fully Remote (Spain) | Engineering — We're VoiceB. We're building the autonomous AI voice sales agent that's automating the last undigitized sales channel: the phone call. Top enterprise brands across telco, banking, insurance, energy and automotive are already using our platform to handle inbound B2C and B2B sales conversations end-to-end — qualifying, pitching, and closing without human agents. We're profitable, growing fast, and just getting started. Now we're hiring a Senior Engineer to help us scale the core platform that powers it all. — 🎯 What you'll do • Design and build core systems behind our autonomous voice agent platform — real-time voice pipelines, LLM orchestration, telephony integrations and CRM connectors., • Own the voice infrastructure layer: Twilio, SIP trunks, WebRTC, and the real-time audio plumbing that makes a sub-second AI conversation feel human., • Ship full stack when needed — backend is your home, but you're comfortable touching the frontend to deliver end-to-end., • Work directly with our CTO and a small, senior engineering team where every line of code matters., • Integrate with Salesforce, HubSpot, ad platforms (Google, Meta) and enterprise CRMs., • Contribute to architecture decisions that will define how voice AI scales over the next 5 years. — ✅ What we're looking for • 5+ years building production backend systems (Node.js, Python, Go, or similar)., • Hands-on experience with Twilio and voice infrastructure — SIP, WebRTC, RTP, codecs, real-time audio. This is non-negotiable., • Experience integrating and working with LLMs, STT/TTS pipelines, or AI/ML systems in production., • Full stack capability — you can move across the stack when the product needs it., • Strong systems thinking: latency, concurrency, reliability at scale., • Advanced English (C1+). You'll work daily with enterprise customers and a global team., • Hard worker, ownership mindset, comfortable in a high-velocity startup environment. — 🎁 Nice to have • Experience with conversational AI, IVR systems, or contact center platforms., • Background in CRM integrations (Salesforce, HubSpot)., • Previous exposure to enterprise-grade compliance (GDPR, ISO 27001, SOC 2). — 💼 What we offer • Fully remote within Spain, with access to a coworking space if you want one., • Reporting directly to Luis Miguel, our CTO., • Market-rate salary + equity compensation after your first year., • A small, senior team working with some of the largest brands in Europe., • Real ownership over critical product areas — no layers, no politics., • A category-defining product at a category-defining moment for AI. — 📍 Location: Spain (fully remote) 🗣️ Language: English (advanced+), Spanish a plus 👤 Reports to: CTO If you want to build the infrastructure that's automating the world's last analog sales channel — and do it alongside a team that ships — let's talk. Apply directly through LinkedIn.