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# Senior Full Stack Engineer - AI Voice Platform

- **Company:** Voiceb
- **Location:** vaucluse, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Cloud Computing, Session Initiation Protocols, Node.Js, Salesforce.Com, Twilio, WebRTC, ReactJS, Large Language Models, Backend, Integration Frameworks, Hubspot
- **Published:** September 6, 2026
- **Apply:** https://eurojobs.com/jobs/26329029/apply

## About the Role

* 4+ years of full stack experience, comfortable owning features end to end on a small, fast-moving team
 * Strong in a modern JS/TS stack (React/Node or similar); comfortable with cloud infrastructure (AWS/GCP)
 * Based in Spain, fully remote, able to overlap with Barcelona working hours
 * Product-minded - you care about what gets built, not just how

Nice to have

 * Experience with real-time or telephony systems (SIP, WebRTC, Twilio)
 * Experience integrating LLMs or other AI/voice tooling into production systems
 * Early-stage startup experience

## Description

We're looking for a senior full stack engineer to join a small, high-ownership engineering team building the core VoiceB platform - the systems behind SuperVoice, SuperQualification, Memory, and our outcome tracking. This is a remote role for someone based in Spain, working closely with our CTO and the rest of engineering.

What you'll do

 * Build and ship features across the platform: backend services, APIs, third-party integrations (Salesforce, HubSpot, Twilio, SIP/WebRTC), and internal tooling
 * Own features end to end - design, build, test, deploy, monitor
 * Partner directly with the CTO and founders on architecture decisions as the platform scales
 * Contribute to security and compliance hardening for enterprise clients