Senior Voice AI Engineer - Brussels - Hybrid

Senior Voice AI Engineer

Location: Brussels, Belgium (Hybrid - approx. 2-3 days onsite in Brussels)
Rate: Market Rates
Start: April/May 2026
Duration: Long-term contract 12 month + multiple years of engagement
Language: English required, English working proficiency. Dutch or French is a plus

*Urgent 12 Month Contract - Role hiring now!*

This is a *Belgium* based role with an excellent immediate start within a Global Consulting company working on *on a client-facing voice bot.*

The Role

You will join a team of AI Dev Engineers and Data Scientists working on a client-facing voice bot. This bot answers customer questions and is built using a hybrid speech stack combining open-source models (ASR, TTS, VAD) with vendor components to achieve Real Time performance.

As a Voice AI Engineer, you will focus on building and integrating the voice components while contributing to the broader AI engineering setup, ensuring solutions are production-ready and operate reliably at scale.

Required Experience/Knowledge

Mandatory Technical Experience

• Strong Python + one systems language (Go/Rust/C++) preferred.
• Experience with streaming audio + WebSockets/gRPC.
• Familiarity with Whisper/NeMo/wav2vec2 or similar ASR stacks and neural TTS stacks.
• Practical telephony experience (PSTN/IVR) and/or WebRTC.
• 4+ years engineering, with 2+ years shipping streaming speech in production.
• Real Time STT + TTS + turn-taking/barge-in experience.
• Telephony: SIP/WebRTC or CPaaS integration, codecs (u-law/A-law), 8kHz realities.
• Can run evaluations: WER by cohort, latency p95, conversation KPIs.
• Comfortable integrating open-source STT/TTS and vendor APIs like Gradium.
• Containerisation/virtualisation
• AI Platforms & IDEs
• CI/CD (gitlab-ci)
• Code, model & data versioning
• Usage of package management tools and experience in dependency management
• PostgreSQL

Preferred Technical Experience

• Speaker diarization/echo cancellation constraints knowledge.
• Experience in regulated environments (banking/insurance/health).
• Experience building semantic VAD or end pointing models.
• experience with integration using different technologies (distributes/Mainframe) and infra components

Mandatory Business Experience

• Knowledge of agile methodology

Soft Skills

• Communication skills - oral & written
• Ability to deliver/Results driven
• Attention to detail/rigor
• Creativity & Innovation/Problem Solving
• Proactively invests time in continuous learning and knowledge improvement.
• Demonstrates awareness of efficiency and efficacy.
• Thinks out of the box outside existing processes and frameworks.
• Works with energy and empowerment to deliver great results and a large contribution to the company's success
• Is constructive by being open to the changes and to other's opinions, ideas and feedback

Please send your CV or call Elif to discuss further.
We are an equal opportunities employment agency and welcome applications from all suitably qualified persons regardless of race, sex, disability, religion/belief, sexual orientation, or age.

We champion differences in technology recruitment and work with clients who actively wish to diversify their talent force - ALL applicants are welcome to apply.