Data Scientist

Job Title: Data Scientist (contract)

Location: London Hybrid. Travel to the London office on an adhoc basis

Duration: 6 months

Contract Start Date: 1 September 2025

Deloitte

Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.

The Role

We are looking for a Data Scientist to join our Data and AI Team supporting internal service delivery transformation projects across Tax and Legal. You will be a Python and Azure expert in designing and building cutting-edge generative AI solutions for complex challenges. You will report to the Technical Lead and collaborate with data scientists, software engineers and market specialists across the team to build and deliver high-impact solutions.

Essential Skills and Experience

• Be an expert Python programmer proficient in frameworks/libraries such as: Numpy, Pandas, Scikit-Learn, Langchain, Llamaindex, Azure AI Foundry amongst others.
• Must have Azure and be an expert with R&D on generative AI techniques
• Practical experience with GenAI techniques such as Finetuning, Prompt engineering, prompt orchestration, retrieval methods (RAG and Knowledge graph techniques), Agentic Systems etc.
• Knowledge of Agentic frameworks such as LangGraph, Azure AI Foundry Agents, Semantic Kernel Agents etc.
• Knowledge of prompt orchestration and optimisation techniques such as Azure Semantic Kernel, Prompt flow etc.
• Skilled at working with AI engineers to write production ready python code and implementing robust quality control methods in solutions
• Have knowledge of basic software engineering concepts and best practices for team-based programming, including versioning, testing, and deployment

Desirable:

• Adept at creating highly optimised workflows and solutions
• Deep knowledge of various Microsoft Azure AI services
• Strong data analytics and visualisation skills specifically using tools like Excel and Alteryx
• Knowledge of Responsible AI practices

Deliverables: Responsibilities but not limited to:

1. Build and deploy Python based AI applications
2. Research and design advanced experiments and prototypes using cutting edge techniques, specifically in GenAI
3. Develop various LLM assisted frameworks
4. Design and write clean, maintainable, auditable and well documented codebases
5. Implement testing pipelines and evaluation frameworks
6. Good documentation practices to ensure seamless operations
7. Exceptional teamwork and communication skills working in a cross functional environment with other data scientists, software engineers and T&L domain experts

IR35

As a means of managing tax, commercial and reputational risks, Deloitte prohibits the use of Associates through Personal Service Companies (‘PSCs’). All Associates must contract under PAYE arrangements through a Deloitte approved ‘Employment Company’ (aka ‘umbrella company.’)