1 to 25 of 125 Senior Data Scientist Jobs in London

The Chief Data Officer Group (CDO), consists of a large community of data scientists, government analysts (GSG, GORS, GES, GSR), intelligence analysts, mathematical modellers, epidemiologists, information specialists, and data engineers. This is a unique opportunity to help provide crucial information and insight to support the management of high-profile health incidents alongside ongoing surveillance activities. UKHSA has … a strong data science community with learning opportunities, community groups and hackathon events. We predominantly code in Python and R and utilise AWS and Azure based cloud environments. The teams use Agile ways of working including software such as Confluence and Jira to manage delivery. Our Enterprise Data and Analytics Platform (EDAP) is enriched with curated, consistent, and … high-quality data from existing platforms as well as providing access to a range of analytical tooling. Main duties of the job We currently have openings in the following teams: Health Analytics and Automation - Leading on the delivery of key products to support incident response and the routine surveillance of health conditions and infectious diseases. Work across directorates and More ❯

Senior Data Scientist Salary from £60,000 to £70,000 depending on experience Permanent Hybrid/London Here at Saga, we are embarking on a data transformation journey across all our established business units, Cruise, Insurance, Travel, Financial Services and Saga Magazine. We are keen to make one more hire to our growing team. You will … be joining a high performing in-house Data Science team that specifically focusses on Marketing domain models. Working as one of our Senior Data Scientist at Saga, you will play a pivotal role in shaping our data strategy and driving the development of advanced analytics solutions. Your primary responsibility will be to harness the power … of data to extract meaningful insights, inform strategic decisions, and contribute to the overall success of the organisation using machine learning and statistical techniques. You will have access to the latest analytical tools and the chance to work with some of the most renowned Decision Data leaders in the UK market. We work in a hybrid way at More ❯

Overview We're seeking a Senior Data Scientist to lead the development of advanced analytics and AI/ML solutions that unlock real value across our business. This is a contract role for 6 months . In this contract role, you'll work with proprietary and B2B research datasets to design, deliver, and scale data-driven … Product, Research, and Technology, you'll help turn strategic ideas into working MVPs-ensuring high standards of methodology, quality, and business relevance throughout. You'll also help shape the data science environment by working alongside our tech teams to support a robust and flexible infrastructure, including sandbox environments for onboarding and evaluating new data sources. This is a … great opportunity for a self-driven, impact-oriented data scientist who thrives in a fast-paced, cross-functional setting-and is eager to deliver meaningful results in a short time frame. Main Duties and Responsibilities Spearhead and execute complex data science projects using a combination of open-source and cloud tools, driving innovation and delivering actionable insights. More ❯

About Jaja Our Mission: Empowering our customers to buy, borrow, and build-driven by tech, fuelled by data, and built for the future. Our Company Values : C are Deeply, Adapt & Thrive, Challenge everything, Go for it! Own it, Make it Simple Jaja is an innovative UK based consumer finance business, leading initially with a digital credit card launched in … real impact in a growing business on a mission to change the face of the consumer finance industry forever . About The Role Jaja Finance is looking for a Senior Data Scientist to join our team. Your role will span across the whole lifecycle of model development. That means you are someone who enjoys in equal measures … the data wrangling to compose meaningful feature and clean sets, and modelling using Machine Learning. You'll develop and deploy machine learning models that power real-world decisions - from underwriting to fraud detection to optimise customer conversion. This is an end-to-end role: data wrangling, model development, evaluation, and performance monitoring. As a Data Scientist More ❯

reasoning in Microsoft 365 Copilot by applying next-generation LLM fine-tuning and reinforcement learning techniques. - Improving Copilot Chat and Researcher response quality through state-of-the-art grounding data selection strategies. - Enhancing Copilot Search by developing novel content representation models. - Building the next wave of recommendation and personalization capabilities across M365 Copilot experiences. - In addition to driving innovation … in deploying machine learning applications at scale in real production environments and proven track record of successfully shipping applied research to production is a must - Excellent problem solving and data analysis skills and a good grasp of applied statistics. Particularly, expertise in developing or applying predictive analytics, statistical modelling, data mining, or machine learning algorithms, especially at scale More ❯

Senior Data Scientist – London Portas Consulting is the leading management consulting firm dedicated to sport. We believe in the power of sport and physical activity to transform lives, communities and nations. We provide inspirational leadership to power this transformation, having fun and showing the passion for doing what we love. We are expanding our Data & AI … team and are looking for a Senior Data Scientist to join the team. You will lead analytical workstreams on client projects, help productionise workflows and mentor more junior members of the team. As part of a fast-growing area, you will get the opportunity to play a central role in developing new IP and shaping the frameworks … performance, commercial and operations. We are looking for someone proactive, excited by the opportunity of working in a growing team, and who loves sport. What you’ll do: Lead data science workstreams on client projects, managing analysts and collaborating with consultants. Develop and deploy statistical models and core IP. Build reusable tools to streamline analysis and visualisation. Communicate insights More ❯

Senior Data Scientist – London Portas Consulting is the leading management consulting firm dedicated to sport. We believe in the power of sport and physical activity to transform lives, communities and nations. We provide inspirational leadership to power this transformation, having fun and showing the passion for doing what we love. We are expanding our Data & AI … team and are looking for a Senior Data Scientist to join the team. You will lead analytical workstreams on client projects, help productionise workflows and mentor more junior members of the team. As part of a fast-growing area, you will get the opportunity to play a central role in developing new IP and shaping the frameworks … performance, commercial and operations. We are looking for someone proactive, excited by the opportunity of working in a growing team, and who loves sport. What you’ll do: Lead data science workstreams on client projects, managing analysts and collaborating with consultants. Develop and deploy statistical models and core IP. Build reusable tools to streamline analysis and visualisation. Communicate insights More ❯

Job summary Join one of the UK's largest and most successful NHS trusts as a Senior Population Health Data Scientist . Based in our pioneering Population Health Hub , you'll play a key role in transforming how we use data to improve health outcomes and tackle health inequalities. You'll lead high-impact projects using … Python, advanced analytics, and real-time NHS data on a cutting-edge cloud platform. From building predictive models to designing data visualisations, your insights will directly shape care models, inform service redesign, and drive preventative, equitable healthcare. You'll work collaboratively with clinicians, system leaders, and the London AI Centre , combining analytical expertise with real-world impact. This … improving population health, we want to hear from you. Our values: Caring. Ambitious. Inclusive. Join us and make a difference Main duties of the job We are seeking a Senior Population Health Data Scientist to lead complex analytics and drive system-wide transformation across Guy's and St Thomas' NHS Foundation Trust. You will evaluate and redesign More ❯

Senior Data Scientist, Creative Optimization Who we are: Choreograph is WPP's global data products and technology company. We're on a mission to transform marketing by building the fastest, most connected data platform that bridges marketing strategy to scaled activation. We work with agencies and clients to transform the value of data by … bringing together technology, data and analytics capabilities. We deliver this through the Open Media Studio, an AI-enabled media and data platform for the next era of advertising. We're endlessly curious. Our team of thinkers, builders, creators and problem solvers are over 1 ,000 strong, across 20 markets around the world. About the Creative Optimisation product: The … tens of millions of ads and t erabytes' worth of media , everyday in real-time, across the globe . About this role: We are on the lookout for a Senior Data Scientist to join our team to co- develop a step-change feature: Algorithmic Content Opitmization (ACO) . Our vision is to leaverage data signals to More ❯

and algorithms to solve complex business problems in recommendations and classification. Successful outcomes will significantly impact our hundreds of millions of daily active users around the globe. As a Senior Data Scientist, you will work in a highly collaborative environment with extensive amounts of data to research and develop deep learning models in the domains of … to improve the performance of deep learning models and propose initiatives to impact company goals directly. Autonomously find solutions to complex problems in social network recommendations and understand the data generation process and challenges with the data. Analyze and leverage the extensive data received from our application to enhance model performance and accuracy. Requirements Master's degree in More ❯

We are looking for a Senior Data Scientist who enjoys seeing their work used as part of 'real-life' solutions. Not only will your work directly contribute to our client deliverables, but you will have the opportunity to see the process through from solution design to deployment, working in close collaboration with our wider team of Data Engineers and Data Analysts. In short, you'll form an integral part of our close-knit team and will have the opportunity to directly contribute to the continued success of the business. We're looking for someone with a cooperative, can-do attitude who can build high-quality data science solutions. If this sounds like you, we … can't wait to hear from you! KEY RESPONSIBILITIES: Actively contribute to the design, development, testing, and evaluation of data science solutions Train and deploy state-of-the-art machine learning and reinforcement learning models Build AI systems using Large Language Models Build processes for extracting, cleaning and transforming data (SQL/Python) Ad-hoc data mining More ❯

Senior Data Scientist - Consumer Lending Hybrid working - London Offices Negotiable to £75,000 DEO + Benefits Reference - J12979 Our client is an innovative UK based consumer finance business, with a digital credit card launched in 2018, and a pipeline of consumer finance solutions in the making. They are on a mission to redefine the consumer finance experience … a chance to make a real impact in a growing business on a mission to change the face of the consumer finance industry forever. About The Role As a Senior Data Scientist your role will span across the whole lifecycle of model development. That means you are someone who enjoys in equal measures the data wrangling … You'll develop and deploy machine learning models that power real-world decisions - from underwriting to fraud detection to optimise customer conversion. This is an end-to-end role: data wrangling, model development, evaluation, and performance monitoring. As a Data Scientist, you'll play a key role in the end-to-end lifecycle of their advanced machine More ❯

Senior Data Scientist – Consumer Lending Hybrid working – London Offices Negotiable to £75,000 DEO + Benefits Reference - J12979 Our client is an innovative UK based consumer finance business, with a digital credit card launched in 2018, and a pipeline of consumer finance solutions in the making. They are on a mission to redefine the consumer finance experience … a chance to make a real impact in a growing business on a mission to change the face of the consumer finance industry forever. About The Role As a Senior Data Scientist your role will span across the whole lifecycle of model development. That means you are someone who enjoys in equal measures the data wrangling … You’ll develop and deploy machine learning models that power real-world decisions — from underwriting to fraud detection to optimise customer conversion. This is an end-to-end role: data wrangling, model development, evaluation, and performance monitoring. As a Data Scientist, you'll play a key role in the end-to-end lifecycle of their advanced machine More ❯

We are looking for a Senior Data Scientist whoenjoys seeing their work used as part of 'real-life' solutions. Not only will your work directly contribute to our client deliverables, but you will have the opportunity to see the process through from solution design to deployment, working in close collaboration with our wider team of Data Engineers and Data Analysts. In short, you'll form an integral part of our close-knit team and will have the opportunity to directly contribute to the continued success of the business. We're looking for someone with a co-operative, can-do attitude who can build high-quality data science solutions. If this sounds like you … we can't wait to hear from you! KEY RESPONSIBILITIES: Actively contribute to the design, development, testing, and evaluation of data science solutions Train and deploy state-of-the-art machine learning and reinforcement learning models Build AI systems using Large Language Models Build processes for extracting, cleaning and transforming data (SQL/Python) Ad-hoc data More ❯

Job Description We want to expand our Data Science function further within our well-established strong data-driven Centralised Analytical department. Our Data Science mission is to build machine models in the production environment relative to Marketing, Customer Insights, and Safer Gambling and establish a strong culture of data-driven decision-making in our organisation's … strategy. We are looking for a well-established Data Scientist at all levels who wants new challenges. As a Senior Data Scientist, you will work using data engineering, statistical, and ML/AI approaches to uncover data patterns and build models. We use Microsoft tech stack, including Azure Databricks (Pyspark, python), and we … are expanding our data science capabilities. To be successful in the role, you will need to have extensive experience in data science projects and have built the professional skill to understand when an approach to a project is not working, to pause and change approach. The Data Science department is currently a smaller team, with an ambition More ❯

to complex client problems. With your expertise in advanced mathematics, statistics, and/or machine learning, you will help build and shape McKinsey's scientific AI offering. As a Senior Data Scientist, you will play a pivotal role in the creation/dissemination of cutting-edge knowledge and proprietary assets. You will work in a multi-disciplinary … team and build the firm's reputation in your area of expertise. You will ensure statistical validity and outputs of analytics, AI/ML models and translate results for senior stakeholders. You will write optimized code to advance our Data Science Toolbox and codify analytical methodologies for future deployment. You will be working in our London office in … will work with cutting edge AI teams on research and development topics across our life sciences, global energy and materials (GEM), and advanced industries (AI) practices, serving as a Senior Data Scientist in a technology development and delivery capacity. You will be on McKinsey's global scientific AI team helping to answer industry questions related to how More ❯

About the Role: Grade Level (for internal use): 10 The Team: The Capital IQ Solutions Data Science team supports the S&P Capital IQ Pro platform with innovative Data Science and Machine Learning solutions, utilizing the most advanced NLP Generative AI models. This role presents a unique opportunity for hands-on ML/NLP/Gen AI/… and LLMs to drive business value for multiple stakeholders while conducting cutting-edge applied research in LLMs, Gen AI, and related areas. Responsibilities and Impact: Develop models, algorithms and data pipelines that leverage wealth of S&P Global data (structured and unstructured) to provide actionable insights to clients. Lead data science product development start to end from … explore and identify the latest relevant techniques. Identify opportunities for innovation across the Market Intelligence division. Provide subject matter expertise to internal stakeholders, advice and guide on model and data suitability. What We're Looking For: 3+ years of professional experience in Advanced Analytics/Data Science/Machine Learning/Quant, including in the Financial Services sector. More ❯

time left to apply End Date: August 31, 2025 (30+ days left to apply) job requisition id R095023 We're the world's leading data, insights, and consulting company; we shape the brands of tomorrow by better understanding people everywhere. Kantar's Profiles division is home to the world's largest audience network. With access to 170m+ people in … over 100 global markets, we offer unrivalled global reach with local relevancy. Validated by industry leading anti-fraud technology, Kantar's Profiles Audience Network delivers the most meaningful data with consistency, accuracy, and accountability - all at speed and scale. We're the world's leading data, insights, and consulting company; we shape the brands of tomorrow by better … understanding people everywhere. About the job As a Senior Data Scientist, you will play a pivotal role in driving data-driven decision-making and shaping strategic initiatives. Your expertise will directly impact the organisation's ability to understand client behaviour, refine predictive models, and deliver actionable insights that influence key business outcomes. You will take on More ❯

Lead Data Scientist Up to £100,000 London (Remote/Hybrid) Company: This is a pre-seed startup on a mission to rethink how content gets made. The media landscape is more competitive than ever, and the old ways of creating and testing content just don’t cut it anymore. They’re using data and AI to … shape stories that actually land with under-served audiences. Responsibilities: Work closely with the founder to translate visionary ideas into practical, data-driven experiments and models. Analyse audience behaviour data and build AI-driven tools (like synthetic test groups) to predict content success. Collaborate with product, creative, and tech teams to embed data insights into content creation … and decision-making. Identify data gaps and design tracking or instrumentation strategies to improve analytics capabilities. Stay hands-on with modelling and analysis while providing realistic guidance to keep projects focused and achievable. Requirements: MSc or PhD Degree in Computer Science, Artificial Intelligence, Mathematics, Statistics or related fields. Strong coding skills in Python and SQL Strong communication skills, with More ❯

Lead Data Scientist Up to £100,000 London (Remote/Hybrid) Company: This is a pre-seed startup on a mission to rethink how content gets made. The media landscape is more competitive than ever, and the old ways of creating and testing content just don’t cut it anymore. They’re using data and AI to … shape stories that actually land with under-served audiences. Responsibilities: Work closely with the founder to translate visionary ideas into practical, data-driven experiments and models. Analyse audience behaviour data and build AI-driven tools (like synthetic test groups) to predict content success. Collaborate with product, creative, and tech teams to embed data insights into content creation … and decision-making. Identify data gaps and design tracking or instrumentation strategies to improve analytics capabilities. Stay hands-on with modelling and analysis while providing realistic guidance to keep projects focused and achievable. Requirements: MSc or PhD Degree in Computer Science, Artificial Intelligence, Mathematics, Statistics or related fields. Strong coding skills in Python and SQL Strong communication skills, with More ❯

Senior Data Scientist - Consumer Behaviour - Exciting Scale-up London office hybrid 3 days per week Salary negotiable depending on experience to £90,000 + stock options Job Reference J12960 Please note this client is unable to offer sponsorship, so please ensure you have full UK working rights. About Measure Protocol Measure Protocol is building the world's … first ethical and transparent human data marketplace. They believe in giving individuals more control over their data and the opportunity to benefit financially from its use. The company has recently raised investment from venture capital and strategic firms, collaborating with leading brands to access consumer behavioural data previously unavailable. The Role Data Cleaning and Preparation: Collect … clean, and prepare large media datasets from various sources for analysis. Statistical Analysis: Use econometric techniques like regression, time series, and panel data analysis to explore relationships between media spend and outcomes. Model Validation and Interpretation: Evaluate model accuracy, interpret results, and communicate findings clearly to stakeholders. Campaign Optimization: Provide insights to improve media buying strategies, including channel allocation More ❯

Senior Pricing Data Scientist Up to 80,000 London (Hybrid, 1 days onsite per week) Company: They provide flexible and reliable home insurance tailored to the needs of modern households. Whether covering unique properties or complex personal circumstances they are committed to making home insurance more inclusive, accessible, and straightforward. Responsibilities: Lead the conversion rate and market … invest and grow even further Working heavily with price comparison websites and making sure they are the most competitive on the market right now Requirements: Master’s degree in Data Science, Computer Science, Statistics, Mathematics, or a related field Proficient in Python (core skill), with strong experience in SQL Strong technical expertise in AI/ML and advanced analytics. More ❯

Senior Pricing Data Scientist Up to 80,000 London (Hybrid, 1 days onsite per week) Company: They provide flexible and reliable home insurance tailored to the needs of modern households. Whether covering unique properties or complex personal circumstances they are committed to making home insurance more inclusive, accessible, and straightforward. Responsibilities: Lead the conversion rate and market … invest and grow even further Working heavily with price comparison websites and making sure they are the most competitive on the market right now Requirements: Master’s degree in Data Science, Computer Science, Statistics, Mathematics, or a related field Proficient in Python (core skill), with strong experience in SQL Strong technical expertise in AI/ML and advanced analytics. More ❯

The role: We are seeking a highly skilled Senior Data Scientist to join our team. Reporting to the Data Delivery Lead, you will analyze and interpret data from various sources to support our clients' decision-making processes. The Data team at Prevail underpins all our mission-focused teams. No two days are the same … world problems. Our ideal candidate will have exceptional analytical skills, capable of navigating complex datasets to turn ambiguous requests into meaningful insights. Key responsibilities include: Analyzing and evaluating intelligence data to identify patterns, trends, and relationships that contribute to actionable intelligence. Utilizing advanced analytical techniques and tools to assess the reliability, accuracy, and relevance of intelligence information. Developing and … maintaining databases, data models, and analytical frameworks for efficient data analysis and retrieval. Collaborating with intelligence and security professionals to understand requirements and priorities. Preparing and delivering reports, briefings, and presentations to communicate findings effectively. Monitoring emerging threats, geopolitical developments, and supporting intelligence assessments and forecasting. Collaborating with cross-functional teams to advocate for high-quality data More ❯

for talented individuals whose principles and interests align with our own. While we don't have a specific vacancy open at the moment, by registering your interest for the Senior Data Scientist Talent Pool, you'll be among the first to hear about job openings in our Frontier Team that align with your experience when they go … live. What you'll be doing: As a Senior Data Scientist within Frontier, you will lead the data science work on project teams that are configuring our product Frontier for our customers. Each deployment of Frontier requires a computational twin, essentially an AI-powered digital twin, to be built, and it is primarily the responsibility of … our data scientists to both design and then build these computational twins. Whilst doing this well is partly about building familiarity with Frontier's development interfaces, it's mainly about doing things that are critical in any applied data science role; namely deeply understanding the core customer problem in order to ensure that the technical solution can drive More ❯