26 to 50 of 55 A/B Testing Jobs in Central London

world outcomes at scale. Key Responsibilities Designing, developing and optimising machine learning models across traditional ML use cases (forecasting, classification, anomaly detection) and GenAI / LLM solutions Leading experimentation cycles, including hypothesis definition, experimental design, evaluation and iteration, while complying with governance standards Transitioning validated experiments into production-ready … TensorFlow Strong experience delivering ML solutions using AWS services (e.g. SageMaker, Lambda, S3) Expertise in experiment design, including hypothesis formulation, A / B testing and statistical evaluation Proven experience moving models from experimentation into production with appropriate governance and quality controls Hands ...

concurrent processing, and building robust automation scripts with proper logging, testing (pytest), and documentation. AI & Machine Learning Frameworks - Deep expertise in AI / ML frameworks including TensorFlow, PyTorch, Scikit-learn, and Hugging Face Transformers. Experience building, training, and deploying machine learning models for classification, regression, clustering … Django REST Framework for exposing AI models and automation services. Experience with API authentication (OAuth, JWT), rate limiting, error handling, API documentation (Swagger / OpenAPI), webhooks, and integrating disparate systems to create seamless automated workflows. Document Processing & OCR - Experience implementing intelligent document processing solutions using OCR technologies (Tesseract, Azure ...

+ Bonus + Benefits Start Date: ASAP About the Opportunity: We are seeking an ambitious and intellectually curious Junior Data Scientist to join a fast-growing, forward-thinking team working at the forefront of data science, machine learning, and applied AI. This is an excellent opportunity for a … modelling, validation, and deployment Applying statistical and AI techniques to generate actionable insights Contributing to experimental research, model prototyping, and A / B testing Presenting findings clearly to both technical and non-technical stakeholders Collaborating across data science, engineering, and product teams ...

concurrent processing, and building robust automation scripts with proper logging, testing (pytest), and documentation. AI & Machine Learning Frameworks - Deep expertise in AI / ML frameworks including TensorFlow, PyTorch, Scikit-learn, and Hugging Face Transformers. Experience building, training, and deploying machine learning models for classification, regression, clustering … Django REST Framework for exposing AI models and automation services. Experience with API authentication (OAuth, JWT), rate limiting, error handling, API documentation (Swagger / OpenAPI), webhooks, and integrating disparate systems to create seamless automated workflows. Document Processing & OCR - Experience implementing intelligent document processing solutions using OCR technologies (Tesseract, Azure ...

Migrate legacy email builds into a standardised design system. Perform quality assurance checks including rendering, deliverability, and troubleshooting. Support A / B testing, benchmarking, and continuous optimisation of email designs. Implement interactive and personalised email components to improve engagement. Collaborate with … Familiarity with interactive email technologies (e.g. Liveclicker, Movable Ink). Experience working in Agile environments (Jira, Workfront). Salesforce Marketing Cloud certifications (Email Specialist / Developer). If you are interested or would like to know more, please email jonathan.la@focusonsap.org with your CV and availability to speak. Applicants ...

looking for a forward-thinking Web & Digital Growth Partner to take ownership of our digital presence and help shape the online experience across all markets. As a key member of the Marketing and Digital team, you’ll be responsible for planning, managing, and optimising our HubSpot … across teams and markets. Desirable Experience with international SEO and multi-language websites. Familiarity with CRO tools (Hotjar, Google Optimize, HubSpot A / B testing). UX / UI or design experience (Figma, Adobe XD). HubSpot certifications or similar credentials. Comfortable ...

DIGITAL DATA ANALYST SALARY UP TO £50,000 LONDON – HYBRID We are looking for a Digital Data Analyst to play a key role in understanding and improving performance across a broad range of digital customer touchpoints, including websites and mobile applications. Working closely with … dashboarding tools Experience building dashboards and visualisations that translate data into clear insights Knowledge of digital analytics methodologies, experimentation or A / B testing, and wider industry trends Excellent communication skills, with the ability to explain data-driven insights to non-technical audiences ...

+ up to 15% bonus 💸 Industry: Global Media 📍 Location: London (4 days per week in office) Why join? Join a leading UK media company in the midst of a major digital transformation. As Senior Product Manager for Subscriptions, you'll own the end-to-end subscription … experience building and scaling subscription or membership products. Deep knowledge of paywalls, pricing models, and retention mechanics. Experience running CRO or A / B testing programs to optimise growth. A data-led mindset balanced with empathy for user experience. Ability ...

benefits Location: Central London - ideally 1-3 times per week in the office but can be flexible on this We're partnered with a well-established and fast growing FinTech that’s building a brand new Acquisition Tech function for the German market. They’re profitable … a profitable, established FinTech 🔧 Fast experimentation culture: evidence over bureaucracy, quick cycles, real autonomy Who we’re looking for: ✔️ Product marketing / management or growth experience focused on acquisition or onboarding ✔️ Strong analytical instincts and hands-on A / B testing ...

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 … 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 ...

inefficiencies. Translate findings into actionable recommendations that improve customer journeys, optimize staffing and routing decisions, and reduce escalations. Enabling experimentation & continuous improvement Key Skills / Experience: 5+ years of experience in Data Analytics or Data Science, ideally with exposure to Customer Success, Operations, or Digital Experience domains Proficiency … processes Experience with Python or R for advanced analytics, automation, or experimentation support preferred Knowledge of statistical methods and experimentation (A / B testing) preferred Machine learning and Generative AI experience is a plus ...

security of the UK. Core Duties • Design and develop machine learning models for traditional ML use cases (forecasting, classification, anomaly detection) and GenAI / LLM applications • Lead experimentation cycles: define hypotheses, design experiments, evaluate results, and iterate rapidly while adhering to governance requirements • Transition validated experiments into production-ready … PyTorch, or TensorFlow • Strong experience with AWS ML services (SageMaker, Lambda, S3) in production environments • Strong experiment design skills: hypothesis formulation, A / B testing methodology, and statistical evaluation • Proven track record transitioning models from experimentation to production with appropriate governance and quality ...

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 … 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 ...

Python, R-Scala. Good Python skills, - Experience from data visualisation tools such as Google Data Studio or Power BI Knowledge in A / B Testing, Statistics, Google Cloud Platform, Google Big Query, Agile Development, DevOps, Date Engineering, ETL Data Processing Strong Migration experience ...

cross-functional orchestration. RESPONSIBILITIES Own outbound pipeline creation: hit monthly meeting and Sales accepted opportunities targets and quarterly pipeline goals for priority ICPs / segments. Prospect into target accounts : research, build lists, and multi-thread into HR, IT, and Operations leaders across enterprise / upper mid-market. … outbound campaigns end-to-end: write sequences, call, email, LinkedIn / video, and A / B test messaging, report results and iterate. Qualify rigorously : use MEDDICC to confirm pain, impact, authority, and next steps, convert first meetings to SAOs. Book and hold meetings : secure ...

Engineering lead) - with advanced Quantitative Analytical skills - to design, build, and run end-to-end AI Solutions for the world’s leading Wellness / HealthTech Business. Based in LONDON, this AI ENGINEERING LEAD role offers a salary of £120K – £130K THE COMPANY: This globally recognised brand … Marketing, Digital, Operations, Finance, and Legal to: Turn ambiguous problems into structured AI opportunities; Define hypotheses and success metrics; Run rapid A / B tests and pilots; Align multiple teams around a single plan; Communicate model limits, trade-offs, risks, and value ...

commerce Data Analyst £55,000 base + strong benefits London (Hybrid, 2 days in Oval + flexibility abroad) Harnham have partnered with a high-growth consumer brand on a mission to disrupt the personal care space. Launched in 2020, they’ve quickly become one of Europe … dashboards and reports in ThoughtSpot Using SQL and dbt to model new data sources and improve reporting accuracy Supporting attribution modelling, A / B test reporting, customer segmentation, and LTV analysis Working cross-functionally to integrate new tools, streamline influencer processes, and improve marketing workflows ...

Rate: Up to £345 per day (umbrella) Duration: 9-month contract (current end date: September 2026) About the Role We’re partnering with a global fintech leader to hire a Data Analyst within their Customer Success Data Science team , driving data capabilities and insights across international … etc.). Deliver deep-dive analytics – Conduct root-cause analysis to identify pain points and drive operational improvements. Support experimentation – Analyse A / B test outcomes to optimize customer and digital experiences. Influence through storytelling – Translate data insights into compelling narratives that drive strategic decisions ...

work on projects such as: Prototyping generative AI applications and scalable LLM-powered tools Designing and running experiments and A / B tests to validate new ideas Conducting consumer behaviour and segmentation research Developing causal models to understand the drivers of customer advocacy and business … modelling, experimentation, prototyping, and cross-functional collaboration. You’re a great fit if you: Have strong experience with ML and generative AI / LLM development Love rapid experimentation and hypothesis-driven prototyping Are comfortable operating in uncertainty and evolving problem spaces Have startup, scaleup, or high-growth ...

identity. Develop dynamic, multi-channel surveys (email, portal intercepts, exit intent). Implement advanced branching logic and variation frameworks for A / B testing. Configure API connections to CRM systems and Power BI for real-time dashboards. Ensure secure data handling and compliance with GDPR … tight timelines. Desirable Skills Familiarity with automotive financial services or similar regulated industries. Experience in UX research and competitor benchmarking. Basic knowledge of JavaScript / HTML / CSS for custom survey styling. Engagement Deliverables Fully branded Qualtrics environment. Configured surveys deployed across multiple channels. Integrated dashboards for real ...

Product Data Analyst - 70k - London London Borough Market Hybrid three days in office We are hiring a Data Analyst to take ownership of analytics across a fast growing B2C mobile app in the sports and entertainment space. This is a hands on product analytics … role focused on understanding user behaviour, engagement, retention and conversion. It is not a business intelligence or reporting led position. The role Own product analytics end to end across a mobile app environment. Design, implement and maintain event tracking and taxonomy across key user journeys. Analyse ...

ship features that directly impact users. Responsibilities Develop, integrate, and fine-tune LLMs for natural-language understanding, reasoning, and workflow automation. Build agentic / LLM-driven workflows for multi-step decision making across diverse data sources. Architect and deliver ML features such as pattern recognition, entity extraction, and intelligent … services, and model inference systems. Manage deployment, monitoring, observability, and continual improvement of ML models. Evaluate model performance using offline metrics, A / B tests, latency and cost optimisation. Work closely with product and domain experts to translate requirements into robust ML solutions. ...

Machine Learning Engineer ~2 days a week in the London office (hybrid, there is a little flexibility on this) About the Company Join a fast-growing platform business that connects buyers and sellers across a diverse marketplace. With deep investments in data … enhance product discovery Integrate ML services into production with support from MLOps and platform engineering teams Run structured experiments including A / B tests and offline simulations to measure impact and identify optimisation opportunities Apply visual similarity and image-based features to improve ranking ...

moments Discovery, Data & Experimentation Lead continuous qualitative and quantitative discovery to understand user behaviour and drop-off drivers Design and run A / B tests and structured experiments to validate hypotheses before development Translate behavioural insight into clear product opportunities and shipped improvements Product Strategy … customer value, and delivery effort in prioritisation decisions Clearly articulate trade-offs and outcomes to senior stakeholders Cross-Functional Leadership Partner closely with UX / UI designers to deliver intuitive, confidence-building experiences Work with engineers to improve performance, reliability, and recovery journeys Collaborate with data, marketing, and growth ...

with advanced techniques in context optimisation, model enhancement, and workflow automation, enabling everything from UI generation to code synthesis. Run focused A / B tests, evaluations, and user-driven experiments to elevate generation accuracy, consistency, and overall performance. Bridge research and production by transforming cutting … real impact. What You'll Bring Hands-on experience working with LLMs (open or closed source). Strong programming skills in Python and JavaScript / TypeScript. Background in applied ML, research engineering, or a closely related domain. Apply below for more information. AI Engineer | London | Hybrid ...