Principal Data Scientist jobs in Cardiff

You will play a key role in the successful delivery of major multidisciplinary development projects, driving technical excellence and supporting digital innovation. ResponsibilitiesLead the coordination and delivery of soil and land use assessments as part of Environmental Impact Assessments for a wide range of projects.

You will work on modernizing authentication and login experiences across multiple consumer applications, helping drive growth through high-quality user experience, experimentation, and data-driven decision making. This is a collaborative role, working closely with engineers, product managers, and cross-functional partners in a fast-paced environment.

You will work on real production problems rather than research-only work, owning models from first iteration through to live deployment.

You will collaborate closely with other data scientists, data engineers, and DevOps, with the freedom to shape how GenAI and ML are used across the platform.

You will design and build the systems that identify the signals that matter most for visibility, the retrieval and embedding architecture that feeds the models, the ranking and scoring framework that prioritises actions and the evaluation layer that measures how different LLMs behave across queries, surfaces and contexts.

Data Scientist - £70k | Remote / Hybrid | FinTech / Payments We’re working with an established FinTech / Payments business that has been helping customers manage and move money globally for many years. The company builds technology-led products that support low-cost, multi-currency payments and money management, operating across several regulated markets. They’re now investing further in their...

You will work across a variety of complex analytical problems, owning experimentation end-to-end—even when ideal conditions such as user randomisation or high statistical power are not present.

You will define technical strategy, design scalable data systems, mentor senior engineers, and partner closely with product, engineering, analytics, and business leaders to transform strategic goals into robust, data-driven solutions.

You will take a lead role in delivering high-quality geospatial solution...

You will complete medium-complexity and normal-risk fire risk assessments (FRAs) and provide clear, specialist advice and technical support to clients.

You will assist with mentoring Graduate Consultants and contribute to the development and growth of the team.

You will support and mentor graduate consultants and develop skills across a range of specialist areas.

You will work on a diverse workload delivering projects for the public and private sectors across the UK including exciting infrastructure and renewables projects.

You will lead on a range of EIA projects within a consultancy environment and provide advice on EIA Regulations and produce Environmental Statements.

Job Profile - Senior / Principal Landscape Architect - EJ45170 Location - Cardiff / Bristol Salary: £40,000 - £50,000 + Excellent Benefits Package Bennett and Game are delighted to represent a well-established, employee-owned multidisciplinary practice seeking an ambitious Senior / Principal Landscape Architect for their Bristol or Cardiff office. Working across planning, urban design, and...

Job Description Job Profile - Senior / Principal Landscape Architect - EJ45170 Location - Cardiff / Bristol Salary: £40,000 - £50,000 + Excellent Benefits PackageBennett and Game are delighted to represent a well-established, employee-owned multidisciplinary practice seeking an ambitious Senior / Principal Landscape Architect for their Bristol or Cardiff office. Working across planning, urban...

You will partner closely with Marketing, Finance, and leadership to optimise our multi-million pound marketing budget and shape the future of our growth.

You will be a key architect of this change, bringing the critical causal inference expertise needed to elevate our team's technical standards and help us generate new, high-value ideas directly from our data.

Computational Biologist / Bioinformatics Data Scientist Antiverse Engineering the future of antibody drug development to change the course of people's lives! Do you want to be part of an ambitious techbio start-up successfully tackling an issue nobody thought possible? Antiverse is seeking a Computational Biologist / Bioinformatics Data Scientist to help develop therapeutics and an enabling...

You should apply if: What we’re doing here at Monzo excites you!

You will have the chance to speak to our recruitment team at various points during your process but if you do have any specific questions or want to talk through reasonable adjustments ahead of or during application please us at any point on tech-hiring@monzo.

About Intellias Intellias is a European-founded AI, Data and Software Development company with global delivery capability across Europe, India and Latin America. For more than 20 years, we've empowered our customers to embrace innovation at scale and contributed to the success of the world's leading brands. The company is featured in the Inc 5,000 Europe and IAOP Global Outsourcing...

You will benefit from a hybrid office‐home working arrangement. We offer a dynamic and supportive environment for motivated individuals, including: - Access to extensive internal and external training opportunities; - Support for volunteering; - A mentoring programme; - Support for gaining chartership through professional institutions.

You will have detailed knowledge, competence and qualifications in a selection of the following fields. It is not expected that applicants will have expertise in all of the below topics. Applicants will be expected to have focus areas and detailed knowledge within them and should demonstrate a willingness to gain expertise in other topic areas.

A prominent techbio startup in Cardiff seeks a Computational Biologist / Bioinformatics Data Scientist. This role involves processing NGS data, collaborating with lab teams, and developing data analysis pipelines against complex biomedical targets. Candidates should be fluent in Python, have strong data analysis skills, and thrive in collaborative environments. The position offers flexible...

A leading insurance comparison site in Cardiff is seeking a Senior Marketing Data Scientist to bridge the gap between data and strategic marketing decisions. This hybrid role involves optimizing a multi-million pound marketing budget and shaping the company's growth. Candidates should possess expert SQL and Python skills, a deep understanding of causal inference methodologies, and proven...