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Marek M.
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Marek M.

Data Scientist | Python, SQL, Excel, Tableau & Machine Learning

I am a Data Scientist with strong expertise in Python, SQL, Excel, and Tableau, specializing in machine learning, predictive modelling, data exploration and visualization. I hold a Master’s degree in Virology and Bioinformatics, which has given me a solid foundation in working with complex datasets, extracting insights, and applying statistical and machine learning methods to solve real-world problems. My skills include: Data Cleaning & Exploration – transforming raw data into actionable insights Data Visualization & Reporting – building interactive dashboards and clear reports in Tableau and Excel Machine Learning & Deep Learning – developing models for classification, regression, and predictive analytics Database Management – writing efficient SQL queries and optimizing workflows I am passionate about helping clients make data-driven decisions by turning numbers into clear stories. Whether you need exploratory analysis, business dashboards, or advanced predictive models, I deliver results that are accurate, insightful, and easy to understand. Let’s work together to turn your data into value.

🇬🇧Manchester, United Kingdom$65/hr100% JSS5.00 (2)Since Aug 2025

Earnings and projects

MRR
$2.9k

Last 6 months ÷ 6

World#13,096 / 412k
🇬🇧Country#309 / 10.7k
Revenue, last 30 days
$0

Last 6 months: $18k

Total earnings
$32k

Billed in all: $34k

World#106,096 / 412k
🇬🇧Country#2,441 / 10.7k
Per project
$11k

$8.8k in the last 6 months

World#14,727 / 412k
🇬🇧Country#227 / 10.7k
Projects, last 6 months
2
0% fixed100% hourly
World#88,921 / 412k
🇬🇧Country#1,969 / 10.7k
Projects in all
3

Across 4 contracts

25% fixed75% hourly
World#304,142 / 412k
🇬🇧Country#8,252 / 10.7k

Earnings, last 30 days

$33.7kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$33.0k$33.5k$34.0k$34.5kOct 9Oct 24Nov 8

Skill rankings: Top 2% in Microsoft Excel

Ranked by MRR among everyone on Upwork with the skill.

  1. #20Python Scikit-Learn555 freelancers · 🇬🇧 #1Top 4%
  2. #88Data Cleaning3,952 freelancers · 🇬🇧 #2Top 2%
  3. #112ETL1,556 freelancers · 🇬🇧 #5Top 7%
  4. #123Tableau2,183 freelancers · 🇬🇧 #9Top 6%
  5. #124Linux3,038 freelancers · 🇬🇧 #3Top 4%
  6. #125Deep Learning2,743 freelancers · 🇬🇧 #4Top 5%
  7. #138Business Intelligence1,802 freelancers · 🇬🇧 #8Top 8%
  8. #174Microsoft PowerPoint7,120 freelancers · 🇬🇧 #3Top 2%