Data Scientist

Job Details:
Work Experience:
Lead end-to-end training and fine-tuning of Large Language Models (LLMs), including both open-source (e.g., Qwen, LLaMA, Mistral) and closed-source (e.g., OpenAI, Gemini, Anthropic) ecosystems.
Architect and implement GraphRAG pipelines, including knowledge graph representation and retrieval for enhanced contextual grounding.
Design, train, and optimize semantic and dense vector embeddings for document understanding, search, and retrieval.
Develop semantic retrieval systems with advanced document segmentation and indexing strategies.
Build and scale distributed training environments using NCCL and InfiniBand for multi-GPU and multi-node training.
Apply reinforcement learning techniques (e.g., RLHF, RLAIF) to align model behavior with human preferences and domain-specific goals.
Collaborate with cross-functional teams to translate business needs into AI-driven solutions and deploy them in production environments.

Qualifications
PhD or Master's degree in Computer Science, Machine Learning, or related field.
8+ years of experience in applied AI/ML, with a strong track record of delivering production-grade models.
Deep expertise in:
LLM training and fine-tuning (e.g., GPT, LLaMA, Mistral, Qwen)
Graph-based retrieval systems (GraphRAG, knowledge graphs)
Embedding models (e.g., BGE, E5, SimCSE)
Semantic search and vector databases (e.g., FAISS, Weaviate, Milvus)
Document segmentation and preprocessing (OCR, layout parsing)
Distributed training frameworks (NCCL, Horovod, DeepSpeed)
High-performance networking (InfiniBand, RDMA)
Model fusion and ensemble techniques (stacking, boosting, gating)
Optimization algorithms (Bayesian, Particle Swarm, Genetic Algorithms)
Symbolic AI and rule-based systems
Meta-learning and Mixture of Experts architectures
Reinforcement learning (e.g., RLHF, PPO, DPO)

Bonus Skills
Experience with healthcare data and medical coding systems (e.g., CPT, CM, PCS).
Familiarity with regulatory and compliance frameworks in AI deployment.
Contributions to open-source AI projects or published research. And/Or ability to take research papers to poc - production.

Diverse Lynx LLC is an Equal Employment Opportunity employer. All qualified applicants will receive due consideration for employment without any discrimination. All applicants will be evaluated solely on the basis of their ability, competence and their proven capability to perform the functions outlined in the corresponding role. We promote and support a diverse workforce across all levels in the company.