Senior Voice AI Engineer - South East London

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 seeking a hands-on Senior Voice AI Engineer on a contract basis for 3-4 months, working remotely and outside IR35 at a day rate of £350-500. We need someone to take our existing voice AI proof of concept and turn it into a reliable, production-grade system that is fast, stable, scalable, and cost-efficient. Our focus is on building a secure, production-ready solution for real users, and we value practical engineering delivery with strong attention to performance, reliability, and data handling.

last updated 25 week of 2026