Senior Voice AI Engineer

Senior Voice AI Engineer - Contract (Outside IR35) | £350-500/day | 3-4 months | Remote We're 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. The prototype works - but it now needs to be made fast, stable, scalable, and cost-efficient. What you'll be doing: - Productionising a voice AI system from an existing PoC - Working with voice platforms such as ElevenLabs / Deepgram (or similar) - Improving real-time performance and reducing latency - Designing lightweight orchestration (simple, deterministic flows over complex prompt chains) - Integrating customer/internal data using RAG approaches - Optimising cost, reliability, and system efficiency - Building and maintaining API/SDK-based voice pipelines - Supporting secure handling of sensitive/PII data What we're looking for: - 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 practical engineering mindset - Comfortable working with sensitive data in production contexts If this sounds like a strong fit, drop me a message. Oscar Associates (UK) Limited is acting as an Employment Business in relation to this vacancy. To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website.