Voice AI Engineer — Remote, Growth & Real-Time Speech

NAIRON GmbH; Schweiz; Remote; CHF 120,000 - 180,000; Full time

Benefits offered by this job

Company laptop

Phone provided

Remote-friendly

Job summary

Nairon GmbH is a Swiss startup building AI voice agents that answer and make phone calls for businesses. We are seeking a Voice AI Engineer to improve real-time conversations, reduce latency, and optimize LLM and speech-model serving on GPUs.

You will work with Python, asyncio, streaming pipelines, and latency-sensitive systems, with opportunities to experiment with LiveKit, WebRTC, and fine-tuning of speech models for multiple languages. Remote-friendly setup offered.

Qualifications

• Senior or strong mid-level engineer with production experience in real-time audio, conversational AI or ML model serving.
• Proficient Python with asyncio and streaming pipelines.
• Experience with GPUs and model serving (e.g., vLLM) and batching/memory basics.

Responsibilities

• Improve turn-taking, voice activity, end-of-turn detection, and latency.
• Cut latency across STT, LLM, and TTS, with seamless provider failover.
• Optimise prompting, tool calls, streaming, and parallel requests for LLMs.
• Serve our own speech models (STT/TTS) on GPUs; measure throughput and time to first audio.
• Fine-tune speech and language models for customer languages and voices.
• Build evaluation frameworks: test calls, benchmarks and quality metrics.

Skills

Python

Asyncio

Streaming pipelines

Speech tech

LLM APIs

GPU model serving

Tools

vLLM

LiveKit

pipecat

WebRTC

Job description

Nairon GmbH is a Swiss startup building AI voice agents that answer and make phone calls for businesses. We are seeking a Voice AI Engineer to improve real-time conversations, reduce latency, and optimize LLM and speech-model serving on GPUs.

You will work with Python, asyncio, streaming pipelines, and latency-sensitive systems, with opportunities to experiment with LiveKit, WebRTC, and fine-tuning of speech models for multiple languages. Remote-friendly setup offered.