Freelance Data Analysts in NetherlandsFreelance Data Analysts in Netherlands
ProjectsPeople
Kris Bruurs's avatar
Kris Bruurs
Amsterdam, Netherlands
Marketing Data Specialist bridging marketing & data science
Marketing Data Specialist bridging marketing & data science
Cover image for Apple Sales Dashboard
Apple Sales Dashboard
0
6
Cover image for WeWorkRemotely Remote Jobs Dashboard
WeWorkRemotely Remote Jobs Dashboard
0
3
Cover image for Customer Churn Prediction Modelling
Customer Churn Prediction Modelling
0
7
Cover image for Global Energy Transition Dashboard
Global Energy Transition Dashboard
0
6
Data Analyst(4)
Ifigeneia Tsiflidou's avatar
Ifigeneia Tsiflidou
The Hague, Netherlands
Data Analyst & Visualizer | Python, Power BI, Tableau, Excel
8
Followers
Data Analyst & Visualizer | Python, Power BI, Tableau, Excel
Cover image for Revenue Prediction Model Development
Revenue Prediction Model Development
3
30
Cover image for Business Analysis & Visualization
Business Analysis & Visualization
3
69
Cover image for Educational Data Analysis and Visualization Project
Educational Data Analysis and Visualization Project
1
12
Placeholder project card media
View more →
Data Analyst(3)
Justin Plagis's avatar
Justin Plagis
Netherlands
Your technical Growth Expert
$10k+
Earned
1x
Hired
1
Followers
Your technical Growth Expert
Cover image for Headless BI-Tool in SQL & BigQuery
Headless BI-Tool in SQL & BigQuery
0
13
Cover image for Auto-pdf processing for email invoices
Auto-pdf processing for email invoices
0
10
Cover image for Courier Onboarding & KYC Platform
Courier Onboarding & KYC Platform
0
13
Placeholder project card media
View more →
Data Analyst(1)
Arkadiusz Staniek's avatar
Arkadiusz Staniek
Grave, Netherlands
C#/.NET Desktop Developer building reliable Windows tools
New to Contra
C#/.NET Desktop Developer building reliable Windows tools
Cover image for New portfolio project: Data Importer
New portfolio project: Data Importer & Cleaner v1.0.1 Messy spreadsheets are easy to clean. Cleaning them safely, reproducibly and without losing track of what changed is the harder problem. I built a Windows desktop application that turns inconsistent CSV and Excel files into validated, cleaned and reusable datasets through a complete reviewable workflow: Import → Profile → Map → Validate → Clean → Deduplicate → Review → Export Built with C#, .NET 10, WPF, EF Core and SQLite. Engineering highlights: → immutable source data → before/after transformation evidence → separate validation and cleaning engines → deterministic duplicate detection → CSV, XLSX and SQLite export → 63 automated tests → zero-warning Release build → 50,000-row pipeline completed in 2.853 seconds → CI, coverage gates and automated release verification The complete project, documentation and Windows release are available on GitHub: https://github.com/Staniek-Tech-NL/data-importer-cleaner #dotnet #csharp #wpf #dataprocessing #softwareengineering
1
71
Cover image for Development of Data Importer & Cleaner Application
Development of Data Importer & Cleaner Application
0
6
Cover image for Invoice Manager — .NET Desktop Application
Invoice Manager — .NET Desktop Application
0
7
Cover image for Reporting & Analytics
Reporting & Analytics
0
5
Data Analyst(1)
Tom S.'s avatar
Tom S.
Amstelveen, Netherlands
**I clean, fix, and organize messy CSV and Excel files.**
New to Contra
**I clean, fix, and organize messy CSV and Excel files.**
Cover image for Yelp Business Listings Data Quality
Yelp Business Listings Data Quality
0
1
Cover image for Household Power Consumption Analysis
Household Power Consumption Analysis
0
3
Cover image for Customer Data Cleaning with Polars
Customer Data Cleaning with Polars
0
2
Cover image for NYC Yellow Taxi — Data
NYC Yellow Taxi — Data
0
4
Data Analyst(3)
Menahil Asim's avatar
Menahil Asim
Amsterdam, Netherlands
Social Media Strategist & Copywriter
Social Media Strategist & Copywriter
Cover image for NonnaPepa | Social Media Management
NonnaPepa | Social Media Management
0
29
Cover image for Lipton NL | Social Media Executive
Lipton NL | Social Media Executive
0
69
Cover image for MacShack | Social Media Management
MacShack | Social Media Management
0
43
Cover image for Adyen | Blog
Adyen | Blog
0
45
Data Analyst(1)