Junior Data Scientist jobs in County of Cardiff

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 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.

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 description and...

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 Skills, Experience, Qualifications, If you have the right match for this opportunity, then make sure to apply today. 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,...

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...

Job Description This role is ideal for an individual at an early stage of their estimating career who is looking to develop strong commercial and technical skills within a structured and supportive environment. The Junior Estimator will work closely with senior estimators, commercial managers and operational teams, gaining hands-on experience across the full estimating and tendering...

Job Description About SystemsX At SystemsX, we’re a fast-growing technology company specialising in AI-driven solutions for customer-centric businesses such as call centres and service organisations. Our mission is to use innovative technology to improve operations, customer experience, and business growth. As we expand rapidly, we offer our team the opportunity to grow with us, take real...

Macrogen Europe BV is a leading provider of genome sequencing services for academic and clinical research, as well as the life sciences industry. We provide flexible, fast sequencing of DNA and RNA with comprehensive, reliable data. Our services are available across Europe and Africa and include whole genome, whole exome, and targeted sequencing – as well as transcriptome, epigenome, metagenome,...

Job Summary Aviation. It connects our world, brings people together, provides opportunities, accelerates economic growth, and is just so very cool! Come work for NAVBLUE, a leading services company owned by Airbus, dedicated to Flight Operations, Air Traffic Management solutions and services for airlines, airports, and Air Navigation Service Providers. We combine aircraft manufacturer expertise,...

The ideal candidate will be responsible for implementing electrical components into devices. They will also help design and manufacture electrical products of all shapes and sizes. They should be able to make quality assurance checks in order to keep the product standard high. Key Responsibilities - Evaluate electrical products and systems by designing testing methods - Test finished products...

🚀 Inside Channel Account Manager (German Speaker) – Step Up Your Sales Career with Adobe! Location: Bournemouth, UK (Hybrid) | Salary: OTE: £43000 | Language: German At EIMS Global Ltd, we’re the sales growth engine behind the world’s biggest tech brands – from Adobe and SAP to Dell and HP. We exist to help global technology leaders scale smarter, sell faster, and expand their market share...

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.

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,...

Database Engineer (PostgreSQL & Python) - MUST BE BASED IN THE UK - Opportunity for a Database Engineer (Junior/Mid/Senior) to join a remote-first, UK-headquartered technology business - Competitive salary between £45,000 - £70,000 + excellent benefits including remote working, autonomy, and the chance to work on an Educational AI platform - Apply online or contact Chelsea Hackett via...

You should apply if: What we’re doing here at Monzo excites you! - You have a multiple year track record of excellence leading the technical work of a team in the development and deployment of advanced Machine Learning models tackling real business problems, preferably in a fast moving tech company

About SystemsX At SystemsX, we’re a fast-growing technology company specialising in AI-driven solutions for customer-centric businesses such as call centres and service organisations. Our mission is to use innovative technology to improve operations, customer experience, and business growth. As we expand rapidly, we offer our team the opportunity to grow with us, take real ownership of their...

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 description and...

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 ahead of this please contact us on tech-hiring@monzo.