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About the Role
We are seeking a highly capable and innovative Data Scientist with experience in Generative AI to lead the development and deployment of GenAI solutions, including LLM-based applications, prompt engineering, fine-tuning, embeddings, and retrieval-augmented generation (RAG) for enterprise use cases. The ideal candidate has a strong foundation in machine learning and NLP, with hands-on experience in modern GenAI tools and frameworks.
Responsibilities
- Design and build Generative AI solutions using Large Language Models (LLMs) for business problems across domains like customer service, document automation, summarization, and knowledge retrieval.
- Fine-tune or adapt foundation models using domain-specific data.
- Implement RAG pipelines, embedding models, vector databases (e.g., FAISS, Pinecone, ChromaDB).
- Collaborate with data engineers, MLOps, and product teams to build end-to-end AI applications and APIs.
- Develop custom prompts and prompt chains using tools like LangChain, LlamaIndex, PromptFlow, or custom frameworks.
- Evaluate model performance, mitigate bias, and optimize accuracy, latency, and cost.
- Stay up to date with the latest trends in LLMs, transformers, and GenAI architecture.
Requirements
- 5+ years of experience in Data Science / ML, with 1+ year hands-on in LLMs / GenAI projects.
- Strong Python programming skills, especially in libraries such as Transformers, LangChain, scikit-learn, PyTorch, or TensorFlow.
- Experience with OpenAI (GPT-4), Claude, Mistral, LLaMA, or similar models.
- Knowledge of vector search, embedding models (e.g., BERT, Sentence Transformers), and semantic search techniques.
- Ability to build scalable AI workflows and deploy them via APIs or web apps (e.g., FastAPI, Streamlit, Flask).
- Familiarity with cloud platforms (AWS/GCP/Azure) and MLOps best practices.
- Excellent communication skills with the ability to translate technical solutions into business impact.
- Must already be eligible to work in the United Kingdom.
Skills
- Generative AI
- LLM-based applications
- Prompt engineering
- Fine-tuning
- Embeddings
- Retrieval-augmented generation (RAG)
- Machine learning
- NLP
- OpenAI
- LangChain
- Hugging Face
- Vertex AI
- Bedrock
- Python
- Transformers
- scikit-learn
- PyTorch
- TensorFlow
- OpenAI (GPT-4)
- Claude
- Mistral
- LLaMA
- Vector search
- Embedding models (e.g., BERT, Sentence Transformers)
- Semantic search techniques
- Scalable AI workflows
- APIs
- Web apps (e.g., FastAPI, Streamlit, Flask)
- Cloud platforms (AWS/GCP/Azure)
- MLOps
- Prompt tuning
- Few-shot learning
- LoRA-based fine-tuning
- Data privacy
- Security considerations in GenAI applications
- Enterprise architecture
- SDLC
- Building GenAI use cases in regulated domains (e.g., finance, insurance, healthcare)
- Palantir Tool knowledge
Location
- London, United Kingdom
Work Type
- Permanent
- Flexible hybrid working
Experience Level
- 5+ years of experience in Data Science / ML
- 1+ year hands-on in LLMs / GenAI projects
Salary/Compensations
- Competitive salary with a generous bonus
Benefits
- Private healthcare
- Critical illness life assurance at 4 x your annual salary
- Income protection insurance
- Rewarding pension
- Everyday financial well-being solutions, such as cash back cards
- Cycle Scheme
- Professional and personal development opportunities
- Learning initiatives
- Employee Stock Purchase Plan (ESPP)
About the Company
- EXL (NASDAQ: EXLS) is a global data and artificial intelligence ("AI") company that offers services and solutions to reinvent client business models, drive better outcomes and unlock growth with speed.
- EXL harnesses the power of data, AI, and deep industry knowledge to transform businesses, including the world’s leading corporations in industries including insurance, healthcare, banking and financial services, media and retail, among others.
- EXL was founded in 1999 with the core values of innovation, collaboration, excellence, integrity and respect.
- We are headquartered in New York and have more than 60,000 employees spanning six continents.
Equal Opportunity
- As an Equal Opportunity Employer, EXL is committed to diversity. Our company does not discriminate based on race, religion, colour, national origin, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, age, or disability status.