Unlocking insight from raw, complex data.
Scroll to exploreYears turning data into decisions
Dashboards & data models shipped
We separate signal from noise.
datalys — from data + lysis, Greek for unlocking and separating. Olympia Tsamoura is a business intelligence analyst. The practice sits between warehouse and boardroom: models that hold their meaning, and stories leadership can actually use.
Models
Stage
Semantic layers, dbt models, and Power BI datasets — the architecture that makes a number mean the same thing in every room.
Stories
Stage
Executive dashboards and self-serve views that carry the decision without a second deck. The model is only finished when someone uses it.
A Power BI dashboard for a two-centre tutoring business: class results in context, an early warning for students at risk, fees, retention and a regional pupil forecast.
Case studies and articles from the work.
AI governance in the maritime industry, a Databricks funnel that shows where shoppers leave, SQL that makes a warehouse honest, and whether AI really makes customer service effortless.
GDPR, the 6Ws, and a hazard taxonomy for AI accidents. Where governance, trust and ethics meet in a fragmented, safety-critical industry.
50,000 sessions on the Databricks Lakehouse. Bronze to Gold, an AI/BI dashboard, and the 58.3% leak between product view and cart.
Two messy Snowflake exports — five price formats, five date formats — cleaned, flagged, and joined into one analysis view.
Customer effort drives disloyalty. What the research says about where AI lowers it, where it shifts it onto the customer, and how to measure it on every journey.
We work in the grain of the data.
Power BI, dbt, and the warehouse layer underneath — credentials that map to the work, not the other way around.
Get in touchIndustries served
Certifications & diplomas
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Have data that's hiding something?
Tell me about the project and the decisions you need to make. I'll help you unlock the answers in your data.
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