Lead AI Engineer

Voyager (94001), India, Bangalore, Karnātaka

Lead AI Engineer

At Capital One India, we are creating responsible and reliable AI systems, changing banking for good. For years, Capital One has been an industry leader in using machine learning to create real-time, personalized customer experiences. Our investments in technology infrastructure and world-class talent — along with our deep experience in machine learning — position us to be at the forefront of enterprises leveraging AI. From informing customers about unusual charges to answering their questions in real time, our applications of AI & ML are bringing humanity and simplicity to banking. We are committed to continuing to build world-class applied science and engineering teams to deliver our industry leading capabilities with breakthrough product experiences and scalable, high-performance AI infrastructure. At Capital One, you will help bring the transformative power of emerging AI capabilities to reimagine how we serve our customers and businesses who have come to love the products and services we build.

Team Description:

The Intelligent Foundations and Experiences (IFX) team is at the center of bringing our vision for AI at Capital One to life. We work hand-in-hand with our partners across the company to advance the state of the art in science and AI engineering, and we build and deploy proprietary solutions that are central to our business and deliver value to millions of customers. Our AI models and platforms empower teams across Capital One to enhance their products with the transformative power of AI, in responsible and scalable ways for the highest leverage impact.

In this role, you will:

Lead and deliver ML/NLP solutions in production environmentsLeverage LLMs to drive and enhance ML/DS workflowsDesign and implement Retrieval-Augmented Generation pipelines covering chunking, embedding, retrieval and re-rankingBuild, orchestrate and evaluate AI agents with tool use and multi-step reasoningDefine and execute evaluation frameworks for generative AI systemsOptimize token usage and context window management for cost and performanceTrain, fine-tune, and serve embedding models for semantic search and retrievalBuild and fine-tune transformer-based models for classification, extraction, summarization, and generationOwn productionization of ML/AI systems including serving, monitoring and reliabilityDrive technical direction & spearhead the technical vision and MLOps strategy, establishing standardized frameworks for model deployment, monitoring and automated retraining

Basic Qualifications

Bachelor's Degree in Computer Science or EngineeringAt least 8 years of experience in traditional machine learning algorithms, advanced natural language processing , model selection and the machine learning experimentation lifecycle including baseline modeling, iterative improvement and offline or online evaluationAt least 5 years of experience engineering and deploying production machine learning and AI systems, including high-throughput model serving, continuous integration and delivery for machine learning, latency optimization and continuous drift monitoringAt least 3 years of experience leveraging PyTorch, Hugging Face Transformers, and LangGraph to develop deep learning models and agentic workflowsAt least 3 years of experience developing, fine-tuning, and serving embedding models using sentence-transformers and modern representation learning stacksAt least 2 years of experience in Large Language Model application development, specializing in advanced prompt engineering, model chaining architectures, and external tool integration

Preferred Qualifications

Master’s Degree in Computer Science or Engineering3+ years of experience applying statistics, probability theory and experimental design, including hypothesis testing, A/B testing frameworks and causal inference methodologies3+ years of experience in agentic search and multi-step LLM driven query planning2+ years of experience architecting and optimizing retrieval pipelines using bi-encoders, cross-encoders and hybrid search techniques like dense and sparse2+ years of experience in fine-tuning pipelines like LoRA, QLoRA & PEFT1+ years of experience designing and implementing AI evaluation frameworks using platforms such as RAGAS and DeepEval, alongside custom quantitative metrics1+ years of experience working with transformer architectures across encoder and decoder paradigms, including BERT, GPT, Llama, and Mistral1+ years of hands-on experience designing and orchestrating multi-agent frameworks and stateful agentic memory architectures while leveraging AI-powered coding environments like CrewAI, Claude Code, and OpenAI Codex

At this time, Capital One will not sponsor a new applicant for employment authorization for this position.

No agencies please. Capital One is an equal opportunity employer (EOE, including disability/vet) committed to non-discrimination in compliance with applicable federal, state, and local laws. Capital One promotes a drug-free workplace. Capital One will consider for employment qualified applicants with a criminal history in a manner consistent with the requirements of applicable laws regarding criminal background inquiries, including, to the extent applicable, Article 23-A of the New York Correction Law; San Francisco, California Police Code Article 49, Sections 4901-4920; New York City’s Fair Chance Act; Philadelphia’s Fair Criminal Records Screening Act; and other applicable federal, state, and local laws and regulations regarding criminal background inquiries.

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Capital One Financial is made up of several different entities. Please note that any position posted in Canada is for Capital One Canada, any position posted in the United Kingdom is for Capital One Europe and any position posted in the Philippines is for Capital One Philippines Service Corp. (COPSSC).