Senior Data Scientist jobs in Hemel Hempstead

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.

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...

At Why Hiring, we believe in the power of connecting talented individuals with incredible remote job opportunities. Our mission is to simplify the job search process and empower professionals to find fulfilling roles that align with their skills and passions, regardless of geographical constraints. In this role as a Junior Data Scientist, you'll collaborate with data experts and various teams...

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 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 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.

Senior Data Engineer | Remote (UK or Europe) Please double check you have the right level of experience and qualifications by reading the full overview of this opportunity below. A leading prop trading firm is hiring a Senior Data Engineer to take ownership of their trading and market data infrastructure. Operating globally with connectivity to dozens of exchanges, the firm executes millions of...

You will be a key technical authority for Terraform across our Azure Data and AI platforms. What You'll Be Doing In this role, you will: - Own and lead Terraform-based infrastructure design for Azure, ensuring scalability, security, and compliance by default. - Develop and maintain advanced Terraform modules, standards, and patterns used across multiple teams and environments.

Technology Recruitment Consultant Working Pattern: Remote-first (UK) Sector Focus: AI, Quantitative, Engineering The Opportunity: An established technology recruitment business is growing its delivery capability and is looking to add experienced recruiters to the team. The firm works exclusively with venture-backed startups and scaling technology companies, supporting highly technical hiring...

Note - role reposted after re-evaluation of grade level. About Colt Data Centre Services Colt Data Centre Services (DCS) has over 20 years’ experience in designing, building and operating energy-efficient, reliable data centres – hosting significant financial, media, corporate and cloud wholesale providers across the world. Our customers are at the heart of everything we do. We endeavour to...

Principal Grafana Network Analytics Engineer Edinburgh, UK | Fully Remote (UK-based) Engineering | Cyber Security £95,000 & Benefits Ever wanted your dashboards to actually defend the internet? This role does exactly that. I’m recruiting on behalf of a high-growth cyber security technology company that protects some of the world’s most critical online services from large-scale DDoS and...

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.

Data Operations Engineer (Early Career) Location: London (hybrid 3 days onsite) Level: Graduate / Early Career The Opportunity We’re working with a high-growth B2B SaaS startup building an advanced enterprise data and decision intelligence platform. They’re looking for a Data Operations Engineer at an early stage in their career who enjoys working behind the scenes to keep complex systems...

You will be responsible for building and executing a new business sales strategy, selling Microsoft Data & AI consulting services into enterprise and mid-market customers across FSI, Retail, Private Sector and MSP-led accounts. Key Responsibilities - Own and drive net-new logo acquisition across Data, Analytics, AI and Modern Data Platform services

Data Operations Engineer (Early Career) Are you ready to apply Make sure you understand all the responsibilities and tasks associated with this role before proceeding. Location: London (hybrid 3 days onsite) Level: Graduate / Early Career The Opportunity We're working with a high-growth B2B SaaS startup building an advanced enterprise data and decision intelligence platform. They're looking...

THE OPPORTUNITY: Lead RevOps Strategist & Platform Specialist, Data Center (remote role UK or Spain) Job Summary: Iron Mountain is seeking a highly experienced, proactive, and strategic Lead RevOps Strategist & Platform Specialist to join our IMDC Global Services team in the UK or Spain (remote role). The Lead RevOps Strategist & Platform Specialist will serve as the pivotal link between our...

We’re hiring a Senior Quality Assurance Specialist known as a Quality Senior Scientist internally Location: Chippenham, Wiltshire, 2 days a week hybrid Contract: Fixed-Term Contract (12 months) Reports to: Scientific Affairs Director – Pharma Division Are you passionate about driving quality excellence in healthcare? Do you thrive in a regulated environment where your expertise directly...

A leading recruitment firm in the UK is seeking Recruitment Consultants at various levels to join their growing team focused on the data and AI sector. With a hybrid work model, the role offers uncapped commission, clear progression paths, and a supportive environment. Candidates will manage the recruitment lifecycle, build expertise in niche data fields, and engage with clients and senior...

A leading developer of data centers in the UK is seeking a Senior Technical Engineering Manager to provide technical leadership across mechanical and electrical systems of their data center estate. The ideal candidate will have strong engineering qualifications, senior leadership experience, and a proven track record in operational excellence. This role offers a chance to work at the forefront of...

Recruitment Consultant – Technology / Deep Tech Location: Remote-first (UK-based) Working Model: Fully remote with occasional team meet-ups Overview: A specialist recruitment consultancy is hiring experienced recruiters to support continued growth across technology and deep tech markets, partnering with high-growth startups and scale-ups. The business operates in an adult, high-trust...