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Sergei D.

Sergei D.

PhD Researcher | Advanced STEM Tutor

I am a cancer immunology researcher with a strong background in technical subjects. I completed Bachelor's in Applied Mathematics and Physics and Master's in Molecular Biosciences. I have a considerable tutoring experience - I have been tutoring since 2nd year of university. I can teach Maths, Physics, Chemistry and Biology up to the early university level. I am multi-lingual: Russian - native English - C2 (TOEFL 117/120 in November 2024) German - B2 French - B1+ Latvian - A2-B1 Spanish - A2

🇩🇪Fuerstenfeldbruck, Germany$30/hr90% JSSSince Feb 2026
GlobeUpwork

Earnings and projects

MRR
$296

Last 6 months ÷ 6

World#98,870 / 412k
🇩🇪Country#723 / 3,842
Revenue, last 30 days
—

Read daily since Oct 12, under 30 days

Total earnings
$1.8k

Billed in all: $1.9k

World#342,134 / 412k
🇩🇪Country#3,108 / 3,842
Per project
$911

$889 in the last 6 months

World#131,099 / 412k
🇩🇪Country#1,112 / 3,842
Projects, last 6 months
2
50% fixed50% hourly
World#88,918 / 412k
🇩🇪Country#715 / 3,842
Projects in all
2
50% fixed50% hourly
World#328,886 / 412k
🇩🇪Country#3,182 / 3,842

Earnings, last 30 days

$1.9k+$894 earned since Oct 12Billed in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$1.0k$1.5k$2.0kOct 12Oct 26Nov 8

Tracked from Oct 12, 2026.

Skill rankings: Top 12% in Biology Consultation

Ranked by MRR among everyone on Upwork with the skill.

  1. #5Cancer20 freelancers · 🇩🇪 #1Top 25%
  2. #15Biology Consultation127 freelancers · 🇩🇪 #1Top 12%
  3. #31Physics Tutoring217 freelancers · 🇩🇪 #1Top 14%
  4. #31Science Tutoring198 freelancers · 🇩🇪 #1Top 16%
  5. #38Bioinformatics238 freelancers · 🇩🇪 #3Top 16%
  6. #53Science & Medical Translation256 freelancers · 🇩🇪 #2Top 21%
  7. #85LaTeX570 freelancers · 🇩🇪 #2Top 15%
  8. #109Chemistry556 freelancers · 🇩🇪 #1Top 20%