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.

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.

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 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 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.

Job Description Join the DataAnnotation team and contribute to developing cutting-edge AI systems, while enjoying the flexibility of remote work and setting your own schedule. We are looking for an expert Biologist (part-time work from home) to help advance AI development. As a member of DataAnnotation’s Biology team, you’ll be part of a growing community of over 100,000 experts who are driving...

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.

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 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.

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

Performance Data ScientistDepartment - Sport System Institute ServicesSalary - £41,574.01 (pro rata - £25,281.49)Working Hours - 3 days per week (22.5 hours) – 12 months fixed term contractLocation - Sport Wales National Centre, CardiffClosing Date - 6th February 2026 9amProvisional Interview Date - 19th February 2026Please go to our website to view the full advert and job description and...

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 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.

You must be self-motivated, enthusiastic, determined and resilient. Work under pressure, with excellent time management and success in meeting tight deadlines. Manage and work on multiple assignments delivering outputs on time and within budget. Understanding of TCPA, DCO, TWAO or equivalent applications.

Join OCI’s Edge Security team as a Principal Engineer to architect and deliver cloud-scale DDoS protection. You’ll lead design for high-performance detection and mitigation systems, drive automation and operational excellence, and set the technical direction for customer-facing DDoS capabilities across OCI’s global edge. This role requires deep expertise in Linux networking data path and...

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.

Job Description Principal / Associate Smart Building Technical Engineer - Building Technology Systems Join to apply for the Principal / Associate Smart Building Technical Engineer - Building Technology Systems role at WSP in the UK & Ireland. What we will be looking for you to demonstrate - A passion for the future of technology in the built environment, and deep curiosity for exploring its...

You will join a growing team of geospatial professionals committed to driving digital transformation and advancing our geospatial capabilities.

You will drive innovation in how clients unlock efficiencies, visualise and interpret complex data, and make informed decisions that shape project success.

Building Safety Consultant (Principal Designer) Arcadis is seeking a Building Safety Consultant interested in advancing their career within a world‐leading architecture, design and engineering consultancy. The role involves working with a diverse range of clients within the built environment to support Arcadis design teams as Principal Designer in achieving compliance with Building Regulations,...

Job DescriptionJoin the DataAnnotation team and contribute to developing cutting-edge AI systems, while enjoying the flexibility of remote work and setting your own schedule.We are looking for an expert Physicist (part-time work from home) to help advance AI development. As a member of DataAnnotation’s Physics team, you’ll be part of a growing community of over 100,000 experts who are driving...