Kosmas Mantsis

I'm Kosmas Mantsis, an analytics professional with a strong background in data-driven decision-making and product analytics. I specialize in experimentation and have a proven ability to use advanced analytical techniques to optimize user experiences and fuel business growth. Right now, I’m a Product Data Analyst at Jimdo, where I’m involved in the entire cycle of growth initiatives, from spotting opportunities to executing and analyzing statistical experiments. I’m skilled in building dashboards, data visualization, automating experimentation pipelines, and communicating insights effectively to stakeholders. Before this, I was a Business Intelligence Analyst at PeoplePerHour, where I led the Analytics roadmap and worked closely with various teams to translate data into actionable insights. I also worked as a Senior Analyst and Analytics Product Developer at IRi, where I contributed to the development of a real-time campaign measurement tool. I hold an MSc in Mathematical Modeling and Financial Engineering from NTUA and have a passion for mentoring, which I’ve demonstrated by volunteering as a Statistics and SQL instructor. I’m proficient in a range of BI tools, statistical packages, and programming languages, making me a well-rounded and effective analytics professional.

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  Conversion rate optimisation

  I specialize in Conversion Rate Optimization (CRO), transforming data into strategies that boost user engagement and drive revenue. By leveraging A/B testing, data analysis, and user behavior insights, I refine customer journeys to maximize conversions. My focus is on delivering measurable, data-backed results that enhance business performance and fuel sustainable growth.

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  Tableau

  7 years of experience

  I specialize in Tableau, transforming complex data into clear, actionable insights through intuitive visualizations. With expertise in dashboard creation and data storytelling, I help teams make informed decisions quickly. My focus is on delivering impactful, user-friendly reports that enhance understanding and drive business growth.