Senior Data Scientist

🔥 9 minutes ago

🏄 California – Remote

🏄 California – Remote

💵 $115.4k - $192.3k / year

⏰ Full Time

🟠 Senior

📊 Data Scientist

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LexisNexis

WebsiteLinkedInAll Job Openings

10,000+ employees

Founded 1970

⚖️ Legal

💼 Consulting

🏥 Healthcare

💰 Corporate Round on 2021-06

Legal • Consulting • Healthcare

LexisNexis is a provider of professional solutions tailored for law firms, corporations, government agencies, and academic institutions. It offers legal solutions, news, and business insights. LexisNexis also provides risk solutions for companies and government agencies, focusing on data analytics for compliance, customer acquisition, fraud detection, health outcomes, identity solutions, investigations, receivables management, risk decisioning, and workflow optimization. As part of the RELX Group, LexisNexis is committed to enhancing digital experience through data and analytics.

📋 Description

• Lead the design and execution of LLM training and fine-tuning projects, including model selection, training strategy, experimentation, and evaluation • Oversee preparation of training datasets through collection, cleaning, deduplication, annotation, and quality validation • Develop and optimize supervised fine-tuning and parameter-efficient fine-tuning workflows • Apply preference optimization methods where appropriate • Establish evaluation frameworks for factual accuracy, instruction following, domain relevance, safety, and business-specific performance • Diagnose training issues and improve model quality, training stability, GPU utilization, and computational efficiency • Manage and mentor data scientists • Review technical work and establish reproducible development practices • Partner with product, engineering, and domain experts to define requirements and support model deployment and monitoring • Manage project priorities, timelines, and compute resources • Communicate results and tradeoffs to stakeholders

🎯 Requirements

• Strong understanding of transformer architectures, attention mechanisms, tokenization, language modeling objectives, and differences between pretraining, continued pretraining, and fine-tuning • Strong Python and PyTorch skills • Practical experience with Hugging Face Transformers, Datasets, or equivalent tools • Demonstrated ability to implement supervised fine-tuning (SFT), configure training objectives and loss masking, tune hyperparameters, and select model checkpoints • Practical experience with parameter-efficient fine-tuning (PEFT), including LoRA or QLoRA • Ability to build instruction-response datasets, apply chat templates, manage sequence lengths and packing, and prevent data leakage and evaluation contamination • Experience training models across multiple GPUs using PyTorch FSDP or DeepSpeed, including mixed precision, gradient accumulation, and gradient checkpointing • Ability to design reliable benchmarks and human evaluations, analyze model errors, and troubleshoot unstable loss, overfitting, and GPU memory issues • Experience with experiment tracking, dataset and model versioning, checkpoint management, and documented training pipelines • Experience managing and mentoring data scientists • Experience partnering with product, engineering, and domain experts • Ability to manage project priorities, timelines, and compute resources • No explicit educational credential or minimum years of experience stated

🏖️ Benefits

• Annual incentive bonus • Healthy work/life balance initiatives • Wellbeing initiatives • Shared parental leave • Study assistance • Sabbaticals • Flexible working hours • Country specific benefits • Disability accommodations during hiring process

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