Here are some old links from my time as a data scientist freelancer with background in mathematics:
• Whatsapp Data Analysis
• Automatic Feature Engineering
• Umsatzprognose
• Prognose Kundenbindung
• Likert Skala Auswertung
• Levene Test
• Einstichproben t-Test
• Einstichproben Gauss-Test
• bike sharing
• einfaktorielle Varianzanalyse ANOVA
• Fragebogenauswertung

You can find me here:
• I rarely have time to do some mathematics, but when I have some time, I like to be around MathOverflow to learn something new:
  Mathoverflow
• I like to share my python scripts and experiments on github for reference:
  githubuser1983
• I do a little bit of algorithmic music in my spare time based on this method I have discovered:
  Music generation with note similarity

If you are interested in Galois-Theory, here you can find my diploma, where I compute the Galois groups of some polynomials.