Hudson and Hayes · Professional services
Real-Time Voice Agents
Delivery context
Personally delivered by Raga AI founder Usman Bukhari through Usman Bukhari Ltd before establishing RAGA AI LTD.
- Sector
- Professional services
Customer phone conversations needed to be handled by voice agents that feel immediate and on-brand, across inbound and outbound flows.
Business challenge
Speech-to-speech has to stay low-latency while still grounding answers in domain knowledge and executing real actions mid-call — and quality has to be measurable in production.
What was delivered
- Production voice agents on Azure AI Foundry using the GPT-4o Realtime API, with function calling for in-call tool use and action execution
- Azure Communication Services telephony with Azure Speech STT/TTS across inbound and outbound call flows
- Custom knowledge grounding for domain-specific, on-brand responses
- Evaluation and observability pipelines tracking call quality, latency and tool-use accuracy in production
Technical implementation
Technology stack
- Azure AI Foundry
- GPT-4o Realtime
- ACS Telephony
- Speech STT/TTS
Related service: AI implementation services
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