Description

Voice AI Engineer · 300,000+ calls processed in production

I'm the Founder & CTO of Sonalyx, a voice AI SaaS B2B. Over the past 12 months I've designed, built and operated production voice agents that have processed more than 300,000 real calls across 5 countries: Spain, Mexico, Dominican Republic, Peru and Canada. Sole engineer responsible for 100% of the codebase and architecture.

MY STACK:

Voice AI orchestration: LiveKit Cloud Agents, ElevenLabs Conversational, OpenAI Realtime

Telephony: Twilio, SIP, WebRTC, multi-region deployment

Backend: Python (FastAPI, asyncio), TypeScript, Next.js

Infrastructure: AWS, PostgreSQL, CI/CD, observability

HOW I CAN HELP

Adding voice to your SaaS without rewriting your stack

Production-ready voice agents that integrate with your existing product. Sub-second latency, human hand-off, multi-language support.

Migrating from Vapi or Retell to LiveKit

I've already done this in production. I know exactly what breaks at scale: SIP, telephony, observability, edge cases. I save you 3-6 months of trial and error.

Voice AI production audit

Latency, costs, conversational quality, edge cases. If your agent "works but something is off", I can diagnose it.

Voice AI architecture from scratch

For startups that want to build it right from day one. Your stack, your control, scalable to millions of calls.

WHY WORK WITH ME

Verifiable production track record: 300,000+ calls, not YouTube demos.

Bilingual ES/EN: I bridge Spanish technical reality and US/UK engineering standards.

Sole engineer mentality: I've built and operated alone. I know exactly what every technical decision costs.

Dual degree in Computer Engineering and Business Administration (University of Vigo, Honours). I understand technical/business trade-offs without needing them explained.

If you are building voice AI or evaluating it, let's talk for 20 minutes with no commitment. I'll tell you whether your case fits my expertise or refer you to someone better suited.

Industry field of expertise

Languages

Spanish
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Madrid (up to 50km)

Sonalyx
Founder & CTO
DIGITAL AND IT
May 2025 - Today (1 year and 1 month)
Madrid, Spain
Cofounder & sole engineer at Sonalyx , voice AI SaaS for professional telephone surveys. Built the complete platform end-to-end from zero to 300,000+ calls delivered across paying clients in different countries like Spain, Mexico, Dominican Republic, Peru orCanada. Reduced client operational costs by 65% vs human-operated surveys.

Tech: Real-time voice orchestration, LLM integration, SIP telephony, multi-region deployment..
Livekit AI Agent Next.js Typescript Python
UVigo Aerotech
Member of the Research & Development Department
DIGITAL AND IT
September 2024 - September 2025 (1 year)
Ourense, Spain
Took ownership of software architecture design for an autonomous drone, prioritizing user safety.

Built the full software stack (Python, ROS2, ArduPilot) with clean, maintainable code.

Authored technical documentation to accelerate onboarding of new developers.

Consistently delivered iterations 20% ahead of schedule, improving project velocity.

Integrated real-time computer vision algorithms for human detection.
Typescript Python AI Agent Computer Vision C++