Skip to content
BackNov 7
Sotiris S.

Sotiris S.

Multilingual AI Training Specialist & Customer Service Agent

Resourceful language and content specialist with hands-on experience in RLHF model evaluation, prompt testing, and localized data annotation (Outlier/Scale AI). Fluent in Greek, English, German (C1), and Norwegian (B2), with a proven track record of delivering high QA scores across complex multilingual projects. Professional Customer Care Specialist for international TaskUs company dealing with German and English speaking clients, with experience of over 2 years in the position- and still going. I am a student of the University of Macedonia in my hometown Thessaloniki, Greece, studying International and European Studies. I hold thorough desire to take upon any freelance job opportunity that can be offered, which matches my skills and ambitions.

🇬🇷Thessaloniki, Greece$8/hr90% JSSSince Nov 2021

Earnings and projects

MRR
$598

Last 6 months ÷ 3.6 months active (since Jul 2026)

World#70,363 / 412k
🇬🇷Country#149 / 1,051
Revenue, last 30 days
$30

Last 6 months: $2.1k

World#101,650 / 412k
🇬🇷Country#266 / 1,051
Total earnings
$2.2k

Billed in all: $2.4k

World#326,902 / 412k
🇬🇷Country#851 / 1,051
Per project
$720

$1.1k in the last 6 months

World#150,333 / 412k
🇬🇷Country#391 / 1,051
Projects, last 6 months
2

Across 3 contracts

100% fixed0% hourly
World#88,918 / 412k
🇬🇷Country#219 / 1,051
Projects in all
3

Across 4 contracts

100% fixed0% hourly
World#304,140 / 412k
🇬🇷Country#803 / 1,051

Earnings, last 30 days

$2.4k+$30 earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$2,380$2,400$2,420Oct 8Oct 23Nov 7

Skill rankings: Top 10% in Closed Captioning

Ranked by MRR among everyone on Upwork with the skill.

  1. #10Bulgarian96 freelancers · 🇬🇷 #1Top 10%
  2. #21Greek184 freelancers · 🇬🇷 #18Top 11%
  3. #22Closed Captioning221 freelancers · 🇬🇷 #1Top 10%
  4. #24Norwegian200 freelancers · 🇬🇷 #1Top 12%
  5. #36AI Evaluation149 freelancers · 🇬🇷 #2Top 24%
  6. #252Website Builder1,478 freelancers · 🇬🇷 #1Top 17%
  7. #261German1,804 freelancers · 🇬🇷 #5Top 14%
  8. #1,978Translation15,921 freelancers · 🇬🇷 #20Top 12%