Role DescriptionThe Campaign Experimentation Specialist / Creative Testing Analyst / Marketing Test Designer designs and evaluates marketing experiments to improve campaign effectiveness, creative performance, and customer engagement. This role turns business questions into testable hypotheses, establishes measurable success criteria, and generates evidence that helps teams make better decisions about messaging, audiences, channels, and customer journeys.The position works closely with Marketing, Creative, Media Buying, CRM, Product, Analytics, and Data Engineering teams. Responsibilities include developing experiment plans, defining control and treatment groups, coordinating creative variations, validating tracking, monitoring test execution, and analysing results. The role assesses whether observed differences are reliable and commercially meaningful, documents limitations, and recommends further testing or implementation. It also maintains experiment records so teams can build on previous findings.For Campaign Experimentation Specialist positions, the emphasis is on coordinating experiments across campaigns and measuring their business impact. Creative Testing Analyst positions focus on evaluating variations in copy, imagery, video, formats, and messaging. Marketing Test Designer positions concentrate on experimental structure, audience allocation, sample requirements, and measurement methods. Across these functions, the role promotes disciplined testing and helps teams distinguish promising results from random variation or measurement errors.QualificationsBachelor’s degree in Marketing, Statistics, Economics, Psychology, Data Analytics, Business, or a related field, or equivalent practical experience.Experience in marketing experimentation, campaign analytics, creative testing, conversion optimisation, or experimental research.Strong understanding of hypothesis development, control groups, randomisation, and experimental validity.For Campaign Experimentation Specialist positions, experience planning and coordinating tests across paid media, email, websites, or other marketing channels.Ability to define primary metrics, supporting indicators, and guardrails that connect tests with business objectives.For Creative Testing Analyst positions, experience evaluating advertising copy, visual concepts, video variations, messaging, and creative formats.Ability to distinguish creative effects from differences in audience composition, media delivery, placement, or campaign settings.For Marketing Test Designer positions, experience selecting suitable test designs and assessing sample size, statistical power, and test duration.Knowledge of A/B testing, multivariate testing, confidence intervals, effect sizes, and appropriate statistical analysis.Awareness of multiple comparisons, repeated significance checks, selection bias, and other common sources of misleading results.Proficiency in Excel and relevant analytics, experimentation, reporting, or data visualisation tools.SQL, Python, or R skills are an advantage for data preparation and more advanced analysis.Experience validating campaign tracking, event definitions, audience allocation, and data quality before interpreting results.Ability to communicate findings, uncertainty, practical significance, and recommendations clearly to creative and commercial teams.Strong analytical, organisational, communication, and stakeholder-management skills, with attention to detail and a structured approach to learning.

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