26 to 50 of 69 A/B Testing Jobs in Central London

About Us Hey there! We’re 5mins.ai, and we’re on a mission to make learning at work fast, fun, and impactful. Our bite-sized training platform helps employees and teams become better, happier, and more successful - through short, gamified lessons that actually stick. We’re the team that previously built Perkbox, UK’s best-known employee experience … offices in London and Porto, with team members across France, Spain, and Argentina. This role is based in London. Learn more: www.5mins.ai The Opportunity We’re looking for a Growth Marketing Manager with a strong digital-first mindset to supercharge our next phase of expansion. This is not your typical marketing role. It’s about engineering … have proven success managing paid campaigns across Google Ads, LinkedIn Ads, and Meta, driving measurable ROI. You have a strong grasp of funnel optimisation, A / B testing, and conversion rate optimisation. You are skilled in HubSpot and lead generation tools like Apollo.io, Instantly, Clay etc. You are highly data-driven More ❯

About Eucalyptus At Eucalyptus, we’re on a bold mission to make good health last a lifetime by combining cutting-edge technology, clinical expertise, and personalised care. In the UK, we’ve quadrupled our business size and earned selective NICE endorsement for our holistic approach to obesity management. Globally, we’ve increased revenue by over … in fast-paced, evolving environments. Experience recruiting and building world class, high performing engineering teams A proven ability of balancing rapid experimentation analytics, and A / B testing with thoughtful execution consistently delivering impactful results.. Experience bridging technical delivery and growth marketing, aligning cross-functional teams around shared goals Comfortable designing … at navigating uncertainty and shifting priorities while inspiring and motivating your team. Hands-on experience in at least one part of our stack is essential: Mobile: React Native, iOS / Android Web Frontend: React, TypeScript, Apollo, Tailwind Backend: TypeScript, Go, GraphQL, PostgreSQL, gRPC Hosting: GCP, AWS Above all, you bring strong commercial insight and a collaborative mindset More ❯

big ideas into the products, content and services millions of people love. And we do it all right here at Sky. What you'll do We are seeking a highly skilled Lead Machine Learning Engineer to advance our personalised recommendation systems by developing efficient, low-latency solutions that serve millions of users globally. The successful candidate will collaborate … datasets. Production Deployment: Deploy and supervise ML models in production environments, ensuring high availability, optimal performance, and continued relevance. Experimentation: Lead the design and analysis of A / B tests and offline experiments to evaluate model efficacy and support continuous improvement. Cross-Functional Collaboration: Engage with multidisciplinary teams to align machine learning initiatives with business … ll bring Demonstrated expertise in the full lifecycle of machine learning, from model development and deployment to monitoring and maintenance. Advanced proficiency in Python and knowledge of ML libraries / frameworks (e.g., TensorFlow, PyTorch). Experience with high-volume data processing and real-time streaming architectures. Strong understanding of recommendation system design and personalisation algorithms. Familiarity with Generative AI More ❯

big ideas into the products, content and services millions of people love. And we do it all right here at Sky. What you'll do We are seeking a highly skilled Lead Machine Learning Engineer to advance our personalised recommendation systems by developing efficient, low-latency solutions that serve millions of users globally. The successful candidate will collaborate … datasets. Production Deployment: Deploy and supervise ML models in production environments, ensuring high availability, optimal performance, and continued relevance. Experimentation: Lead the design and analysis of A / B tests and offline experiments to evaluate model efficacy and support continuous improvement. Cross-Functional Collaboration: Engage with multidisciplinary teams to align machine learning initiatives with business … ll bring Demonstrated expertise in the full lifecycle of machine learning, from model development and deployment to monitoring and maintenance. Advanced proficiency in Python and knowledge of ML libraries / frameworks (e.g., TensorFlow, PyTorch). Experience with high-volume data processing and real-time streaming architectures. Strong understanding of recommendation system design and personalisation algorithms. Familiarity with Generative AI More ❯

innovators. They help millions of people transform their digital memories into something tangible and meaningful - combining design, data, and storytelling to create emotionally engaging experiences. You’ll join a forward-thinking marketing function where creativity meets analytics, and where your ideas will directly influence how customers connect with the brand. The CRM Manager will lead customer relationship strategy … deliver the full CRM strategy and content calendar from concept to execution Collaborate with creative, product, and data teams to craft persuasive multi-channel campaigns Use A / B testing, segmentation, and automation to improve conversion and engagement Champion customer insight and feedback loops to evolve messaging and strategy Report on CRM performance … + performance bonus potential Hybrid working (3 days in office) 25 Days holiday plus bank holidays (closed between Christmas and New Year) Equity options Group pension scheme (salary exchange / sacrifice) Private medical insurance, including dental and eye cover Travel subsidies - Cycle to work scheme / season ticket loans Enhanced sickness & parental leave L&D budget for conferences More ❯

innovators. They help millions of people transform their digital memories into something tangible and meaningful - combining design, data, and storytelling to create emotionally engaging experiences. You’ll join a forward-thinking marketing function where creativity meets analytics, and where your ideas will directly influence how customers connect with the brand. The CRM Manager will lead customer relationship strategy … deliver the full CRM strategy and content calendar from concept to execution Collaborate with creative, product, and data teams to craft persuasive multi-channel campaigns Use A / B testing, segmentation, and automation to improve conversion and engagement Champion customer insight and feedback loops to evolve messaging and strategy Report on CRM performance … + performance bonus potential Hybrid working (3 days in office) 25 Days holiday plus bank holidays (closed between Christmas and New Year) Equity options Group pension scheme (salary exchange / sacrifice) Private medical insurance, including dental and eye cover Travel subsidies - Cycle to work scheme / season ticket loans Enhanced sickness & parental leave L&D budget for conferences More ❯

THE COMPANY: A global leader in online food delivery, connecting millions of customers with restaurants across more than 80 markets. The company’s culture is built around collaboration, innovation, and data-driven decision-making . Their Customer Analytics team plays a central role in driving customer growth and loyalty through actionable insight and experimentation. THE ROLE … As a Senior Customer Analyst , you’ll join the Customer Analytics function, working closely with the Loyalty and Retention teams to drive customer engagement and growth through data. In this role, you’ll: Deliver insights and recommendations to improve customer retention and loyalty. Support the Loyalty Proposition rollout , identifying opportunities to bridge competitive gaps. Conduct customer growth and … productionising analytical workflows . Nice-to-Have Skills: Dashboarding experience (Looker preferred; Tableau also valuable). Working knowledge of Python and cloud technologies . Exposure to A / B testing or experiment design . Preferred Backgrounds: Experience within eCommerce , telecommunications , or large-scale loyalty schemes . THE BENEFITS: Competitive £500 per day (Inside More ❯

THE COMPANY: A global leader in online food delivery, connecting millions of customers with restaurants across more than 80 markets. The company’s culture is built around collaboration, innovation, and data-driven decision-making . Their Customer Analytics team plays a central role in driving customer growth and loyalty through actionable insight and experimentation. THE ROLE … As a Senior Customer Analyst , you’ll join the Customer Analytics function, working closely with the Loyalty and Retention teams to drive customer engagement and growth through data. In this role, you’ll: Deliver insights and recommendations to improve customer retention and loyalty. Support the Loyalty Proposition rollout , identifying opportunities to bridge competitive gaps. Conduct customer growth and … productionising analytical workflows . Nice-to-Have Skills: Dashboarding experience (Looker preferred; Tableau also valuable). Working knowledge of Python and cloud technologies . Exposure to A / B testing or experiment design . Preferred Backgrounds: Experience within eCommerce , telecommunications , or large-scale loyalty schemes . THE BENEFITS: Competitive £500 per day (Inside More ❯

They’re building tools that give creators and brands full control of their visual storytelling, powered by some of the most advanced generative models in the industry. With a suite of top-ranked apps, an in-house AI research team, and a newly open-sourced visual generation model, this team is redefining how content gets made … and distributed. From creators and artists to marketers and media companies, their tools are already shaping the future of digital production. Now, they’re hiring a Senior Product Analyst to help shape what comes next. What’s the role? 🧠 You’ll be joining the Product Data team, sitting at the centre of product strategy, user insights, and business … into insight, and insight into product decisions Collaborate with PMs, engineers, and business leads to uncover opportunities and shape roadmap priorities Lead experimentation strategy, setting up A / B testing foundations and measuring impact Combine quantitative data and qualitative research to validate ideas and identify opportunities Partner with data engineers to ensure accurate More ❯

They’re building tools that give creators and brands full control of their visual storytelling, powered by some of the most advanced generative models in the industry. With a suite of top-ranked apps, an in-house AI research team, and a newly open-sourced visual generation model, this team is redefining how content gets made … and distributed. From creators and artists to marketers and media companies, their tools are already shaping the future of digital production. Now, they’re hiring a Senior Product Analyst to help shape what comes next. What’s the role? 🧠 You’ll be joining the Product Data team, sitting at the centre of product strategy, user insights, and business … into insight, and insight into product decisions Collaborate with PMs, engineers, and business leads to uncover opportunities and shape roadmap priorities Lead experimentation strategy, setting up A / B testing foundations and measuring impact Combine quantitative data and qualitative research to validate ideas and identify opportunities Partner with data engineers to ensure accurate More ❯

SENIOR CUSTOMER ANALYST SALARY UP TO £70,000 LONDON We’re looking for a Senior Customer Analyst to work with a global business within the food ordering marketplace to focus on understanding, optimising, growing and extracting value out of their customer base. THE ROLE AND RESPONSIBILITIES: You’ll work on maximising the current value of the … in a clear and impactful way that drives action. Optimization & Experimentation : Continuously explore new opportunities to deepen understanding of customer behaviour through advanced analytics, A / B testing, and experimentation. YOUR SKILLS AND RESPONSIBILITES: Customer & Lifecycle Analytics: Hands-on experience in customer and lifecycle analytics, particularly within B2C, subscription-based, or … considered an advantage. Data Visualization: Proficient in using tools such as Tableau and Looker to create compelling, actionable visual insights. Stakeholder Communication : Skilled at presenting complex findings in a clear, accessible manner to both technical and non-technical audiences. Customer Metrics Expertise: Deep understanding of core customer KPIs including retention, lifetime value (LTV), churn, and their underlying drivers. More ❯

SENIOR CUSTOMER ANALYST SALARY UP TO £70,000 LONDON We’re looking for a Senior Customer Analyst to work with a global business within the food ordering marketplace to focus on understanding, optimising, growing and extracting value out of their customer base. THE ROLE AND RESPONSIBILITIES: You’ll work on maximising the current value of the … in a clear and impactful way that drives action. Optimization & Experimentation : Continuously explore new opportunities to deepen understanding of customer behaviour through advanced analytics, A / B testing, and experimentation. YOUR SKILLS AND RESPONSIBILITES: Customer & Lifecycle Analytics: Hands-on experience in customer and lifecycle analytics, particularly within B2C, subscription-based, or … considered an advantage. Data Visualization: Proficient in using tools such as Tableau and Looker to create compelling, actionable visual insights. Stakeholder Communication : Skilled at presenting complex findings in a clear, accessible manner to both technical and non-technical audiences. Customer Metrics Expertise: Deep understanding of core customer KPIs including retention, lifetime value (LTV), churn, and their underlying drivers. More ❯

innovators. They help millions of people transform their digital memories into something tangible and meaningful - combining design, data, and storytelling to create emotionally engaging experiences. You’ll join a forward-thinking marketing function where creativity meets analytics, and where your ideas will directly influence how customers connect with the brand. The CRM Manager will lead customer relationship strategy … deliver the full CRM strategy and content calendar from concept to execution Collaborate with creative, product, and data teams to craft persuasive multi-channel campaigns Use A / B testing, segmentation, and automation to improve conversion and engagement Champion customer insight and feedback loops to evolve messaging and strategy Report on CRM performance … + performance bonus potential Hybrid working (3 days in office) 25 Days holiday plus bank holidays (closed between Christmas and New Year) Equity options Group pension scheme (salary exchange / sacrifice) Private medical insurance, including dental and eye cover Travel subsidies - Cycle to work scheme / season ticket loans Enhanced sickness & parental leave L&D budget for conferences More ❯

innovators. They help millions of people transform their digital memories into something tangible and meaningful - combining design, data, and storytelling to create emotionally engaging experiences. You’ll join a forward-thinking marketing function where creativity meets analytics, and where your ideas will directly influence how customers connect with the brand. The CRM Manager will lead customer relationship strategy … deliver the full CRM strategy and content calendar from concept to execution Collaborate with creative, product, and data teams to craft persuasive multi-channel campaigns Use A / B testing, segmentation, and automation to improve conversion and engagement Champion customer insight and feedback loops to evolve messaging and strategy Report on CRM performance … + performance bonus potential Hybrid working (3 days in office) 25 Days holiday plus bank holidays (closed between Christmas and New Year) Equity options Group pension scheme (salary exchange / sacrifice) Private medical insurance, including dental and eye cover Travel subsidies - Cycle to work scheme / season ticket loans Enhanced sickness & parental leave L&D budget for conferences More ❯

Data Scientist – Marketing Analytics 3-Month Contract £480 Per Day Outside IR35 Our client is a rapidly growing business operating in over 80 countries. The data science function is relatively new and plays a pivotal role in measuring marketing effectiveness and refining campaign strategies across global markets. We are looking for a Data Scientist … Key Responsibilities: Lead Marketing Mix Modelling (MMM) initiatives to evaluate campaign effectiveness using tools such as Robyn (Meta) and Meridian (Google). Finalise and implement the A / B testing framework, ensuring robust experiment design and causal impact measurement. Automate modelling pipelines to streamline marketing analytics processes. Work hands-on with complex, incomplete … commercial experience in data science , preferably in eCommerce or marketing analytics. Strong hands-on experience with Databricks, SQL, Python, and PySpark ; knowledge of R and dashboarding tools is a plus. Proven experience with causal inference, MMM modelling, and experimentation . Strong analytical and problem-solving skills with the ability to work independently. Excellent communication skills to explain complex More ❯

Senior Frontend Engineer – Join a profitable FinTech Scale-Up 🚀 💰Up to £110,000 🏡Hybrid working – once a week onsite in London 💻React, TypeScript, API experience We’re partnered with a leading FinTech scale-up who are transforming how small businesses access finance to grow and scale. The business is backed by a … across the UK and Europe. They combine cutting-edge technology and data science to enables finance to be accessible for their customers and they are now looking for a Frontend Engineer as the business continues to scale. What will you be doing: Be responsible for taking ownership of projects and running the front-end … development for their customers Build the interfaces that allow customers to choose between different products to best find the product that meets their requirements Implement robust A / B testing and tracking to measure the impact you’re making on the product and how this can shape future product decisions Build and develop More ❯

Senior Frontend Engineer – Join a profitable FinTech Scale-Up 🚀 💰Up to £110,000 🏡Hybrid working – once a week onsite in London 💻React, TypeScript, API experience We’re partnered with a leading FinTech scale-up who are transforming how small businesses access finance to grow and scale. The business is backed by a … across the UK and Europe. They combine cutting-edge technology and data science to enables finance to be accessible for their customers and they are now looking for a Frontend Engineer as the business continues to scale. What will you be doing: Be responsible for taking ownership of projects and running the front-end … development for their customers Build the interfaces that allow customers to choose between different products to best find the product that meets their requirements Implement robust A / B testing and tracking to measure the impact you’re making on the product and how this can shape future product decisions Build and develop More ❯

A global lifestyle brand is hiring a Data Product Owner to help shape how data is used across the business and communicate insights through compelling storytelling. The role sits within the newly formed Consumer Intelligence and Experience (CIX) team, which leads market research, segmentation, and consumer activation across all brands and channels. You’ll help internalise … management and go-to-market strategy Strong PowerPoint and stakeholder communication skills Familiarity with documentation tools like Confluence Understanding of B2C concepts such as ROI and A / B testing Python or SQL skills and interest in MMM or MTA Details Salary: £60–75k per annum Duration: 12-month fixed-term contract Location … Hybrid, with 2–3 days / week in Central London office Start date: ASAP More ❯

A global lifestyle brand is hiring a Data Product Owner to help shape how data is used across the business and communicate insights through compelling storytelling. The role sits within the newly formed Consumer Intelligence and Experience (CIX) team, which leads market research, segmentation, and consumer activation across all brands and channels. You’ll help internalise … management and go-to-market strategy Strong PowerPoint and stakeholder communication skills Familiarity with documentation tools like Confluence Understanding of B2C concepts such as ROI and A / B testing Python or SQL skills and interest in MMM or MTA Details Salary: £60–75k per annum Duration: 12-month fixed-term contract Location … Hybrid, with 2–3 days / week in Central London office Start date: ASAP More ❯

time | Salary - 60,000 - 70,000 plus bonus Be the voice of the customer. Drive customer-led growth. Shape the future of customer experience. We’re looking for a strategic and hands-on Senior Customer Insight & Data Manager to lead a customer-first transformation. You’ll champion the voice of the guest across every decision, harness … CRM and loyalty data, and turn insight into action that fuels growth. You’ll lead a team of two and own all customer data and insight touchpoints — from qualitative research to advanced analytics — distilling complex data into compelling stories that influence stakeholders across the business. What You’ll Do Lead and develop the … customer insight team to deliver actionable insights Own Bloomreach data analysis to power CRM and loyalty strategies Drive segmentation, event tracking, and workflow integrations Champion experimentation: A / B testing, regression, CLV, churn prediction Lead brand health tracking and competitor analysis Create guest avatars and embed segmentation across the business Design and deliver More ❯

time | Salary - 60,000 - 70,000 plus bonus Be the voice of the customer. Drive customer-led growth. Shape the future of customer experience. We’re looking for a strategic and hands-on Senior Customer Insight & Data Manager to lead a customer-first transformation. You’ll champion the voice of the guest across every decision, harness … CRM and loyalty data, and turn insight into action that fuels growth. You’ll lead a team of two and own all customer data and insight touchpoints — from qualitative research to advanced analytics — distilling complex data into compelling stories that influence stakeholders across the business. What You’ll Do Lead and develop the … customer insight team to deliver actionable insights Own Bloomreach data analysis to power CRM and loyalty strategies Drive segmentation, event tracking, and workflow integrations Champion experimentation: A / B testing, regression, CLV, churn prediction Lead brand health tracking and competitor analysis Create guest avatars and embed segmentation across the business Design and deliver More ❯

a high-impact opportunity to define the look, feel, and usability of a product that will transform how students learn. Role Responsibilities Optimize the UI / UX of our US-facing product to drive adoption and engagement. Design, implement, and analyze A / B tests to refine features and improve … overall flow. Role Requirements Grew up in the US with a strong knowledge of the pre-university education system. 2–3 years of industry experience in UI / UX design. Proficiency in Figma and a track record of delivering polished design systems. Extreme eye for detail, with a user-first mindset and passion … tech and motivated by building products that create real impact. Experience ideating, prototyping, and experimenting with AI tools (e.g., ChatGPT, Cursor). An online portfolio showcasing mobile app and / or web design work products. Ideal Candidate Quality Focus: Obsessive attention to detail and commitment to shipping polished, bug-free experiences Collaborative Spirit: Ability to work closely with designers More ❯

a high-impact opportunity to define the look, feel, and usability of a product that will transform how students learn. Role Responsibilities Optimize the UI / UX of our US-facing product to drive adoption and engagement. Design, implement, and analyze A / B tests to refine features and improve … overall flow. Role Requirements Grew up in the US with a strong knowledge of the pre-university education system. 2–3 years of industry experience in UI / UX design. Proficiency in Figma and a track record of delivering polished design systems. Extreme eye for detail, with a user-first mindset and passion … tech and motivated by building products that create real impact. Experience ideating, prototyping, and experimenting with AI tools (e.g., ChatGPT, Cursor). An online portfolio showcasing mobile app and / or web design work products. Ideal Candidate Quality Focus: Obsessive attention to detail and commitment to shipping polished, bug-free experiences Collaborative Spirit: Ability to work closely with designers More ❯

Senior Marketing Data Analyst – Fast-Growing Global FinTech Love finding patterns in data that drive smarter marketing? We’re partnering with a global FinTech that’s transforming how people trade and invest. With hundreds of thousands of active users worldwide, they’re scaling fast — and they’re looking for a Senior Marketing Data Analyst to help … marketing or growth focus Strong SQL skills and experience building robust data pipelines (DBT, Airflow) Confident using tools like Looker, Amplitude, GA, and Optimizely A / B testing expertise and deep understanding of marketing KPIs and attribution models Great communication skills — able to turn data into stories and influence senior stakeholders More ❯

Senior Marketing Data Analyst – Fast-Growing Global FinTech Love finding patterns in data that drive smarter marketing? We’re partnering with a global FinTech that’s transforming how people trade and invest. With hundreds of thousands of active users worldwide, they’re scaling fast — and they’re looking for a Senior Marketing Data Analyst to help … marketing or growth focus Strong SQL skills and experience building robust data pipelines (DBT, Airflow) Confident using tools like Looker, Amplitude, GA, and Optimizely A / B testing expertise and deep understanding of marketing KPIs and attribution models Great communication skills — able to turn data into stories and influence senior stakeholders More ❯