Senior Voice AI Engineer

Salary: £91,000 - 130,000 per year

Requirements

• Strong experience building voice AI or real-time speech systems
• Hands-on experience with speech-to-text and text-to-speech APIs
• Proven ability to deliver production-grade AI systems
• Good understanding of latency and performance optimisation
• Experience with RAG and data-driven AI architectures
• Strong API integration skills and a practical engineering mindset
• Comfortable working with sensitive data in production contexts

Responsibilities

• Productionise a voice AI system from an existing proof of concept
• Work with voice platforms such as ElevenLabs, Deepgram, or similar tools
• Improve real-time performance and reduce latency
• Design lightweight orchestration using simple, deterministic flows over complex prompt chains
• Integrate customer and internal data using RAG approaches
• Optimise cost, reliability, and system efficiency
• Build and maintain API and SDK-based voice pipelines
• Support secure handling of sensitive and PII data

Technologies

• AI
• API
• Support

More

We are offering a Senior Voice AI Engineer contract role on an outside IR35 basis, paying £350-500 per day for 3-4 months on a remote arrangement. We are looking for a hands-on engineer to take an existing voice AI proof of concept and turn it into a reliable, production-grade system ready for real users. We value practical engineering, fast delivery, and solutions that are stable, scalable, and cost-efficient.

last updated 25 week of 2026