Optum India
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Hyderabad · On-site · 11-14 Yrs · Sep 4
Healthcare Services & Hospitals · 10000+ Employees · Eden Prairie, US
Optum, part of the UnitedHealth Group family of businesses, is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. Here, you will find a culture guided by inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us advance health optimization on a global scale. Join us to start Caring. Connecting. Growing together.
What employees say
+ Optum provides an excellent, stable environment for Medical Coders. The company offers great training programs and continuous learning opportunities, which are perfect for career g
− Because it is a massive organization under UnitedHealth Group, internal processes, HR compliance, and system updates can sometimes feel a bit slow or bureaucratic. However, this is
More reviews on the company profile.
Interview experience · Software Engineer
Nice ambiance and hiring manager is so kind clearly explain the process flow and what it my role would be in the company overall nice conversation and HR process also good hiring process also fine
Average difficulty · Chennai · 728 reports
More interview insightsJob description
Overview
The Lead AI/ML Engineer is a primary driver in the design and development of state-of-the-art Artificial Intelligence solutions with a strong focus on Natural Language Processing (NLP), Transformer-based architectures, Vector Database technologies, and Retrieval-Augmented Generation (RAG).
Responsibilities
- 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.
- Deep knowledge and extensive experience with Machine/Deep Learning frameworks including transformer architectures, state space models, large language models, and agentic approaches.
- 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.
- Knowledge of algorithms and techniques within a computational domain with emphasis on text processing.
Qualifications
- LLM training and fine-tuning (e.g., GPT, LLaMA, Mistral, Qwen)
- Graph-based retrieval systems (Knowledge Graphs)
- Embedding models (e.g., BGE, E5, SimCSE)
- Semantic Search and Vector Databases (e.g., FAISS, Weaviate, Milvus)
- Model Fusion and Ensemble Techniques (Stacking, Boosting, Gating)
- Optimization Algorithms (Bayesian, Particle Swarm, Genetic Algorithms)
- Reinforcement Learning (e.g., RLHF, PPO, DPO, GRPO), Supervised Fine-Tuning (SFT), LoRA, QLoRA, Axolotl
- Prompt Optimization Frameworks (AutoPrompt, GreaterPrompt, DSPy), GEPA
Nice to have
- Master's degree in Computer Science, Machine Learning, Artificial Intelligence, or a related field.
- 11-15+ years of experience in Data Science, Applied AI/ML, and Statistical Modeling, with a strong track record of developing, deploying, and scaling production-grade AI solutions.
- Natural Language Processing (NLP)
- Fundamental Machine Learning
- Deep Learning
- Transformer Architectures
- State Space-Based Architectures
- Azure ML and/or AWS
- Strong Python programming, SQL, database querying, data preparation, and analysis skills
- Exploratory Data Analysis (EDA)
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Job application FAQ
Last updated 15 September 2026
- How do I apply for Lead AI/ML Engineer ( NLP, Transformers, Vector Databases, and RAG), at Optum India?
- Open this job on Feedback AI and sign up free (or sign in). You can apply from the job detail page; match scores and skill gaps appear when your profile is complete. Optum India may attach structured assessments to interview rounds after you apply.
- Does Feedback AI show a match score for this Lead AI/ML Engineer ( NLP, Transformers, Vector Databases, and RAG), role?
- Yes after you add a resume or skills. Match score ranks this role against your profile — skills met, gaps, level, and location — so you prioritise applications where fit is strongest.
- Is Lead AI/ML Engineer ( NLP, Transformers, Vector Databases, and RAG), remote or on-site in Hyderabad, Telangana?
- This listing is marked on_site with location Hyderabad, Telangana. Confirm details on the job description before applying.
- What skills matter for this Lead AI/ML Engineer ( NLP, Transformers, Vector Databases, and RAG), role at Optum India?
- This is a lead Lead AI/ML Engineer ( NLP, Transformers, Vector Databases, and RAG), role. Key skills include skills listed in the job description. Feedback AI highlights matched vs missing skills on your profile after signup.