Lead Applied Scientist

Lead Applied Scientist, Search - NLP/GenAI

This position is based in either Zug, Switzerland or London, UK.

Want to use your experience of building search-led AI solutions to enhance our leading products in the tax, legal and professional services industries?

Document understanding is a foundational intelligence layer that powers every major capability across our legal AI platform—from search and information extraction to agentic reasoning in products. You'll build state-of-the-art semantic chunking, document enrichment, and knowledge graph construction systems that serve as the cognitive foundation multiple product teams depend on, working across authoritative legal, tax, and accounting content and extraordinarily diverse customer data.

This is a rare opportunity to solve publishing-quality research problems with immediate production impact—your innovations will directly shape how millions of legal professionals research, analyze, and reason over complex legal documents while advancing the capabilities that enable the next generation of intelligent legal AI agents.

About the Role

As a Lead Applied Scientist, you will:

Lead the design, build, test, and deployment of end-to-end AI solutions for complex document understanding tasks in the legal domain

Direct the execution of large-scale projects including: advanced semantic chunking models for lengthy, non-uniformly structured legal documents with adjustable granularity; document enrichment systems with legal and customer-defined taxonomies; LLM-based knowledge graph construction pipelines that extract and link heterogeneous legal knowledge; and scalable synthetic data generation systems

Serve as the technical lead and primary point of reference, ensuring full accountability for all research deliverables

Partner with engineering to guarantee well-managed software delivery and reliability at scale across multiple product lines

Evaluate, Optimize & Advance Capabilities

Design comprehensive evaluation strategies for both component-level and end-to-end quality, leveraging expert annotation and synthetic data

Apply robust training methodologies that balance performance with latency requirements

Lead knowledge distillation initiatives to compress large models into production-ready SLMs

Maintain scientific and technical expertise through product deliverables, published research, and intellectual property contributions

Inform Labs shared capabilities and research themes through novel approaches to challenging business problems

Drive Strategic Technical Direction

Independently determine appropriate architectures for complex document understanding challenges, balancing accuracy, efficiency, and scalability

Make critical technical decisions on semantic chunking strategies, document classification approaches, LLM-based knowledge extraction methods, and multi-document reasoning architectures

Provide input to business stakeholders, mid-to-senior level leadership, and Labs leadership on long-term AI strategy

Develop in-depth knowledge of TR customers and data infrastructure across multiple products to shape technical roadmaps

Align, Communicate & Lead

Partner closely with Engineering and Product teams to translate complex legal document understanding challenges into scalable, production-ready solutions

Engage stakeholders across multiple product lines to deeply understand use case requirements, shaping objectives that align document understanding capabilities with diverse business needs including next-generation search and deep legal research

Mentor and coach team members with varied ML/NLP abilities, building technical capability across the organization

About You

You're a fit for the role of Lead Applied Scientist if you have:

PhD in Computer Science, AI, NLP, or a related field, or a Master's degree with equivalent research/industry experience

Demonstrable hands-on experience building and deploying document understanding systems, information extraction pipelines, or knowledge graph construction using deep learning, LLMs, and NLP methods

Proven ability to translate complex document understanding problems into innovative AI applications that balance accuracy and efficiency

Demonstrated ability to provide technical leadership, mentor team members, and influence without formal authority in an applied research setting

Strong programming skills (e.g., Python) and experience with modern deep learning frameworks (e.g., PyTorch, Hugging Face Transformers, DeepSpeed)

Publications at relevant venues such as ACL, EMNLP, ICLR, NeurIPS, SIGIR, or KDD

Technical Qualifications

Deep understanding of document understanding fundamentals: document layout analysis, semantic chunking approaches beyond fixed-size or paragraph-based methods, document classification handling hierarchical taxonomies, imbalanced multi-label classification, and adapting to domain-specific schemas

Expertise in knowledge extraction and knowledge graph construction: entity recognition and linking, relation extraction, citation parsing, and building graph representations from unstructured text

Expertise in LLM-based information extraction, few-shot and multi-task learning, post-training, and knowledge distillation

Solid understanding of synthetic data generation techniques for NLP, including query-answer generation with verification and scalable data augmentation for training specialized models

Solid understanding of efficiency optimization including knowledge distillation, model compression, and designing SLM-based solutions that balance performance with computational constraints

Solid understanding of DL/ML approaches used for NLP tasks

Experience designing annotation workflows, creating high-quality labeled datasets with clear guidelines, and developing evaluation frameworks for document understanding tasks