Senior Data Scientist
£65,000-£75,000
Remote in the UK (1-2 days a month on-site in London)
The Company
I am partnering with an innovative AI and analytics software business building cutting-edge conversational data products; having initially focused on digital use cases, the business is now pivoting into financial services, working with clients across capital markets and trading environments. Their core offering centres around conversational AI for data, enabling users to interact with complex datasets through natural language. Alongside this, they are developing private, enterprise-grade language models, allowing organisations to securely deploy LLM-powered analytics within their own environments; this is a high-growth, product-led environment with a strong engineering and DevOps backbone, operating fully within AWS.
The Role
As a Senior Data Scientist, you'll play a key role in advancing their AI product suite, working across both NLP-driven systems and next-generation LLM applications. You'll sit within a growing Data Science team (currently 5, including 2 senior members), helping to shape technical direction while mentoring more junior colleagues.
Key responsibilities include:
* Building and optimising machine learning and LLM-based models
* Fine-tuning and deploying models within production environments
* Working on conversational AI systems, including NLP and data interaction layers
* Collaborating closely with engineering and DevOps teams in an AWS environment
* Applying statistical and mathematical thinking to solve complex, real-world problems
* Supporting the evolution of products tailored to financial and trading use cases
Your Skills & Experience
* Strong Python and machine learning fundamentals
* Solid grounding in mathematics and statistics
* Experience with LLMs, NLP, or deep learning models
* Exposure to fine-tuning, model optimisation, and deployment
* Understanding of financial services or trading environments (highly desirable)
* Comfortable working in agile/sprint-based environments
Nice to have:
* Quant or trading-related experience
* Experience with modern AI infrastructure (e.g. model serving, MCP servers)
The Benefits
* £65,000-£75,000
How to Apply
Please register your interest by sending your CV to Adam Osborne at Harnham via the Apply link on this page