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Lead Data Scientist – Generative AI
Lisboa
Descrição da posição
We are seeking a Lead Data Scientist to architect and build next-generation voice-enabled virtual assistants powered by large language models. This role will focus on creating seamless, natural conversational experiences that combine advanced LLMs with state-of-the-art voice AI technologies.
Key Responsibilities
- Lead the design and development of intelligent virtual assistants that integrate LLMs with real-time voice interaction capabilities
- Architect end-to-end conversational AI pipelines, including speech recognition, natural language understanding, LLM reasoning, response generation, and text-to-speech synthesis
- Optimize LLM performance for conversational contexts, including prompt engineering, fine-tuning, and context management for multi-turn dialogues
- Design and implement low-latency inference systems to enable responsive, human-like voice conversations
- Build evaluation frameworks to measure conversation quality, coherence, accuracy, and user satisfaction
- Integrate multi-modal capabilities allowing the assistant to process and respond to both voice and text inputs seamlessly
Requirements
Technical Focus Areas
- LLM Integration: Adapting large language models (GPT, Claude, Llama, etc.) for conversational contexts and virtual assistant use cases
- Conversational AI: Dialogue management, context tracking, memory systems, and multi-turn conversation optimization
- Real-time Systems: Low-latency streaming architectures for natural voice interactions with minimal delay
- Personalization: Building adaptive systems that learn user preferences and communication styles
Required Qualifications
- PhD or Master's degree in Computer Science, AI, NLP, or related field with 4+ years of experience,
- Extensive experience working with large language models (GPT-4, Claude, Gemini, LLaMA, etc.) and prompt engineering
- Deep understanding of conversational AI architecture, including dialogue systems and natural language understanding
- Strong knowledge of transformer architectures and experience fine-tuning LLMs for specific domains
- Proficiency with modern ML frameworks (PyTorch, TensorFlow) and LLM APIs (OpenAI, Anthropic, etc.)
- Experience optimizing models for production, including latency reduction and cost optimization
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