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Guillaume D.

data analyst/ scientist/ CRO/ BI/ Web performance

Moves to Nantes

  • 47.2172
  • -1.554
Propose a project The project will begin once you accept Guillaume's quote.
Propose a project The project will begin once you accept Guillaume's quote.

Location and workplace preferences

Nantes, France
Can work on-site in your office in
  • around Nantes and 10km


Project length
  • ≤ 1 week
  • ≤ 1 month
  • Between 1-3 months
  • Between 3-6 months
Business sector
Would prefer:
  • Automobile
  • Digital & IT
  • Consulting & Audits
  • E-commerce
  • Luxury Goods
+18 autres
Would prefer avoiding:
Banking & Insurance
Company size
  • 250 - 999 people
  • 1000 - 4999 people
  • ≥ 5000 people




Skills (24)

Guillaume in a few words

Analytics & (Big) Data specialist, generating insights using Best In Class Methodologies & Tools
Founded DataMa.fr, providing analytics services for smart decisions. Serving multiple well known clients in the web industry.
Previous experience: 7+ years of experience in working for leading companies in Web & Tech (Homeaway, Expedia Inc.) and Business Consulting (Bain & Company).
Hands on expertise in data mining for conversion rate optimization (CRO) in particular through Search & Ranking (aka Searchandizing), but also proven ability to deal with top management levels in order to focus data analysis on the right business priorities.
Proven ability to develop complex modeling and vizualization, specifically on R, and R Shiny applications.
Check out my website : DataMa.fr


Portfolio is only available to registered users




Founder & CEO

Paris, France

July 2017 - Today (4 years and 6 months)

Created DataMa company, providing Analytics Services for smart decisions with your data.
Deep expertise in data analytics, in particular for online players: conversion rate optimization with plug & play modeling solutions to fasten your analytics capabilities
Check out www.DataMa.fr
Preferred tools: R, R Shiny, SQL, Hive, Hadoop, Tableau, Excel, Google Platform (Google Analytics, Big Query, Data Studio, GSheets), Content Square


Travel & Tourism

Analytics & Data Insights Manager

Paris, France

June 2014 - July 2017 (3 years)

In charge of Sort Order Analytics & Data Insights, in the Business Intelligence team:
• Design the global sort order algorithm to be used on all the sites of Homeaway, resulting in significant improvement of conversion
• Monitor performance and identify improvements of sort algorithm through big data analysis
• Plan, design and read out results of A/B testing for sort optimization, in close collaboration with product manager
• Collaborate and guide Data Science to build customized machine learning models for sort (Supervised learning: GBDT, SVM)
• Define business requirements for sort developers
• Build ad-hoc strategic modeling for key business decisions on marketplace design, search & Geo optimization and conversion improvement
• Manage a team of 3+ Data Analysts (France & USA) – daily management, performance review, training & hiring, in Agile environment (Scrum on Jira)

Tools: SQL, Tableau, Google Analytics & Big Query, Excel, Hadoop, R, HUE, Hive, AWS & Athena, Datameer, Jira, MS Office & Google Suite

Bain & Company - Bain & Company

Consulting & Audits


Paris, France

March 2010 - June 2014 (4 years and 3 months)

• In charge of data analysis and recomendation building
• Team work including interns/ junior management
• Performing clients interviews and presentation meetings

~15 cases of ~2 months for large groups directions:
• Practices: Business development, Business plan, Costs
reduction, Customer/Category/Footprint management,
• Industries: E-commerce, Retail, Consumer Goods, Telecom,
Media services, Financial services, Private Equity
• Offices: Paris, London, Bruxelles, Düsseldorf

Tools: Excel, Access, PowerPoint

1 external recommendation

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