Senior Data Scientist jobs in Wales

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.

Performance Data Scientist Department - Sport System Institute Services Salary - £41,574.01 (pro rata - £25,281.49) Working Hours - 3 days per week (22.5 hours) 12 months fixed term contract Location - Sport Wales National Centre, Cardiff Closing Date - 6th February 2026 9am Provisional Interview Date - 19th February 2026 Please go to our website to view the full advert and job...

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 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.

Job Description Senior Scientist – Cyber AI / Machine Learning Research Location: Newport, Wales (Hybrid – 3 days onsite) Contract: 12 months (strong likelihood of extension) Rate: £50 per hour (Umbrella) ?? IR35: Inside IR35 Clearance: BPSS (must be eligible) --------------------------------------------------------------- The Opportunity We are supporting a defence organisation at the...

Spherical Search has recently partnered with a well-established Analytical Testing and CRO services organisation specialising in inhalation and nasal drug delivery. The company works with a broad range of pharmaceutical, biologics, and device organisations on a global scale. We are currently seeking a Senior Scientist to join the team in an on-site role, based within a commutable distance of...

Reports to: Technology Director / Executive Sponsor Location: Remote with occasional travel to London (2 times a month) Contract: Full-time, permanent Base Salary: £70,000 – £80,000 location and experience dependent + 10% company bonus scheme and sales commission scheme Why This Role Exists Serve Legal is entering a new chapter: evolving beyond compliance auditing into AI enabled,...

Job Description The Audit Data Analytics Senior Manager role in Cardiff is an excellent opportunity to lead and enhance data-driven auditing processes for a Top-20 accountancy firm. This position requires expertise in accounting and finance, with a focus on leveraging data analytics to deliver effective solutions. Client Details The company is a well-established organisation within the UK...

Job Description Company:Intelligent Data & Tape Solutions Ltd ( IDATS ) specialise in the access and management of legacy data, particularly stored on tape and have created a portfolio of products and services that access, liberates, migrates and deletes data without using the original systems or infrastructure used to create it. This allows clients to gain an understanding of their legacy data...

You will work with a diverse portfolio of clients, from Global financial institutions through Government Agencies to Bio and Pharma, ensuring their most valuable assetstheir datais preserved, accessible, and optimised for the future.

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.

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 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.

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 work in an environment where problems are genuinely complex and often have no off-the-shelf solutions .

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.

Reports to: Technology Director / Executive Sponsor Location: Remote with occasional travel to London (2 times a month) Contract: Full-time, permanent Base Salary: £70,000 – £80,000 location and experience dependent + 10% company bonus scheme and sales commission scheme Why This Role Exists Serve Legal is entering a new chapter: evolving beyond compliance auditing into AI enabled,...

You will work in an environment where problems are genuinely complex and often have no off-the-shelf solutions .