Petteri H.
Helsinki, Finland
100%
Job Success
Rising Talent
Scientist, data science and visualization
$70.00/hr
Gain new insight into your data with expert statistical analysis and clear, informative visualizations. I'm happy to help you with data science, data visualization, time series analysis and forecasting, statistics, (electro)physiological signal processing, and psychophysics.
As a DSc, researcher, I regularly develop custom analytics for complex data and produce publication-grade visuals using Python, R, and MATLAB.
Work history
Work history
Mapping data
Jun 10, 2025
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Jul 1, 2025
No feedback given
Private earnings
Optimizing FFT for RF signal in MATLAB
Jun 5, 2025
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Jun 23, 2025
No feedback given
Private earnings
Automated report processing in R
Mar 7, 2024
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Apr 25, 2025
"Petteri was phenomenal. Among the best freelancers I've worked with on Upwork. Super responsive, knowledgeable, and timely."
Private earnings
R coding to restructure data (rush job)
Jun 11, 2024
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Apr 25, 2025
No feedback given
Private earnings
Implement 1-50Hz Bandpass FIR Filter in JavaScript
Dec 12, 2024
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Dec 23, 2024
Private earnings
Python Data Visualization Project
Mar 12, 2024
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Jul 16, 2024
"Petteri is your must-go-to for Python-related projects!"
Private earnings
Neuroscience/Psychology Expert for EEG Study Protocol Development
Jun 3, 2024
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Jul 11, 2024
"Petteri was very helpful in moving this project forward! His thorough and reflected analysis of the task proved to be a great assistance into making good decisions for the project's…
Private earnings
Turn data sheet into different coloured squares
Jul 1, 2024
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Jul 4, 2024
"Petteri was a brilliant freelancer to work with. In his opening bid he demonstrated that he understood the brief perfectly and within a couple of days he had given me…
Private earnings
Need help with Python API
Jun 20, 2024
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Jun 28, 2024
"Petteri was a thorough professional. I strongly recommend him for your projects."
Private earnings
Adding Lab Streaming Layer (LSL) to an existing python application
Feb 19, 2024
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Mar 1, 2024
"Great Work, fast, easy to communicate with and everything well documented, 10/10 would hire again for sure"
Private earnings
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Skills
Skills
- Data Science
- Python
- R
- Time Series Analysis
- Matplotlib
- Visualization
- Scientific Illustration
- Statistics
- Neuroscience
- ggplot2
- Scripting
- TypeScript
- Node.js
- MongoDB
- Acoustical Engineering