Principal Data Scientist jobs in Warrington

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 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 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.

Our client is an industry leading market-research company who use data-driven insights to provide unique and actionable data for some of the world's most recognised brands. Over the last 12 months they've experienced a period of rapid growth and they are positioned to continue this growth for the foreseeable future so it's an ideal time to join the team. They need a strong Data Scientist to...

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 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.

Job Description Hybrid Working - 2 days WFH Senior role to lead a small, existing team Grown up culture with full autonomy Free parking Early finish on Friday Stable company with an excellent reputation US hours - 11-7pm A Senior/Principal/Lead 360 Consultant for our US division. This is key to the companies strategy over the next couple of years, so they're keen to hire a future leader...

Job Description My client is a well-established business who have developed a reputation for providing excellent quality mechanical and electrical building services design, positioning themselves as preferred design consultants for a host of prestigious clients across a range of sectors. To kickstart 2026 they are introducing Data Centre work and they are looking for a Senior/ Principal/...

Job Description Job Title: Senior / Principal Hydraulic Modeller Salary: £45,000 - £65,000 (dependent on experience) Location: Leicester, Leeds or Manchester (other UK locations considered) Type: Permanent | Hybrid About the Role: This is an exciting opportunity to develop innovative solutions addressing key environmental issues such as flood risk and wastewater management. You'll lead and...

You will be working alongside a multi-disciplinary team of water project experts on a range of capital delivery projects.

You will have a substantial opportunity to contribute towards optioneering, outline, and detailed design expertise across various frameworks.

You should demonstrate the ability to work independently and as part of a collaborative team sharing knowledge and best practice

You will also be tasked to improve the analysis and visualisation of data as well as determine improvements to the efficiency and effectiveness of the Hair Category capability through the optimisation of instrumentation, methods and data handling processes, and the building of links between objective measures of performance and consumer perception.

This is a rare opportunity to join at the start of something big. The excitement of a startup with the security of a big, established company. We are helping a large UK-owned software group to build and scale a world-class, AI-first engineering organisation in Manchester. They have very ambitious plans and the budget to make it happen. As one of the first and most important hires, they are...

You will be working on a varied portfolio of frameworks and projects which are predominantly UK-based but with some overseas opportunities.

You will take the lead and deliver on small projects up to the value of a few £million and provide technical support to end users, Landlords, management agents, project managers and the like.

You will operate as a technical authority, working closely with senior engineering, product, and technology leaders. Your focus is end-to-end solution architecture, not diagram production.

You should be comfortable: - Working across product, engineering, and senior stakeholders

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...

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...

Data Engineer - Opportunity for a Data Engineer to join an exciting Internet Marketing Agency in Liverpool - Salary up to £50,000 + some fantastic benefits including hybrid working, a collaborative environment and private health insurance - Apply online or contact Chelsea Hackett via [email protected] WHO WE ARE: We are a thriving agency in Liverpool looking to recruit a Data...

You will have a strong health and safety culture with experience of operating safe systems of work, be ambitious, enthusiastic and have good communication skills. Our team is based across the UK working on a variety of projects, therefore flexibility, overnight stays plus occasional night work may be required.

Job Description Our client is a well-established business who have developed a reputation for providing excellent quality mechanical and electrical building services design, positioning themselves as preferred design consultants for a host of prestigious clients across a range of sectors. To kickstart 2026 they are introducing Data Centre work and they are looking for a Senior/ Principal/...

You will have a strong health and safety culture with experience of operating safe systems of work, be ambitious, enthusiastic and have good communication skills. Our team is based across the UK working on a variety of projects, therefore flexibility, overnight stays plus occasional night work may be required.