Senior Full Stack Engineer — Ai Voice Platform

Voiceb.Ai; Lugo; A distancia; EUR 60.000 - 95.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Fully remote (Spain-based)

Equity

Direct architectural influence

Descripción de la vacante

Voiceb.Ai is seeking a senior full stack engineer to join a small, high-ownership team building the core VoiceB platform. This is a remote role for someone based in Spain, with close collaboration to the CTO and engineering.

You will own features end to end, ship backend services, APIs, and integrations with Salesforce, HubSpot, Twilio, and SIP/WebRTC, while contributing to security and scalable design.

Formación

• 4+ years of full stack experience 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, overlap with Barcelona working hours.

Responsabilidades

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

Conocimientos

Full stack experience

React/Node.js stack

Cloud infrastructure

Product-minded

Herramientas

Salesforce

HubSpot

Twilio

Descripción del empleo

We build autonomous AI voice agents that close and qualify sales for large B2C enterprises - telcos, energy providers, insurers, banks. Our agents already run live inside companies like Vodafone España and Holaluz, and we're mid-rollout across an 8-market European deployment with Alpega/Teleroute. We're a small team moving fast, and we're building the commercial engine to match the product.

The role

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

What we're looking for

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

What we offer

• Competitive salary + equity
• Fully remote (Spain-based)
• Direct influence over the architecture of a product still being defined

We're hiring deliberately, not urgently - we'd rather find the right person than fill the seat fast. If this sounds like your kind of problem, we'd love to hear from you.