Senior AI Engineer: Semantic Search & RAG

Stealth AI Startup; Stockholms kommun; Sur place; SEK 650 000 - 900 000; Plein temps

Résumé du poste

Stealth AI Startup in Sweden seeks a talented NLP/IR engineer to build production-grade semantic search systems, dense retrieval, and RAG pipelines. You will translate ideas into scalable architectures and deliver interpretable results for real users.

Candidates should have MSc/PhD in NLP/IR, hands-on experience with transformers and Hugging Face, and a track record of shipping systems used by people.

Qualifications

• MSc in NLP, Information Retrieval, Computational Linguistics, or Computer Science from a top university or equivalent standing
• Production experience building semantic search or information retrieval systems that real users depend on
• Architectural understanding of transformer models; deep comprehension beyond surface-level APIs
• Proficiency with the Hugging Face ecosystem, fine-tuning, evaluation, and production deployment

Responsabilités

• Build query understanding pipelines covering intent classification, named entity recognition, semantic parsing, and contextual query expansion across multilingual distributions
• Design and build dense retrieval infrastructure with bi-encoder and cross-encoder architectures for semantic search
• Build re-ranking systems to surface the most relevant results at query time
• Design and operate RAG pipelines that assemble information from multiple sources for a grounded generative interface
• Fine-tune pretrained language models on domain data to improve vocabulary coverage and pattern recognition
• Build precision evaluation infrastructure: query-level relevance, coverage, and longitudinal quality tracking

Description du poste

Stealth AI Startup in Sweden seeks a talented NLP/IR engineer to build production-grade semantic search systems, dense retrieval, and RAG pipelines. You will translate ideas into scalable architectures and deliver interpretable results for real users.

Candidates should have MSc/PhD in NLP/IR, hands-on experience with transformers and Hugging Face, and a track record of shipping systems used by people.