Top Data Preprocessing freelancers

103 freelancers list Data Preprocessing on Upwork.

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Showing 50 of 103Data updated Nov 7

# Freelancer		SinceMember since
Madhan K. 🇮🇳🇮🇳 AI-Powered B2B Lead Generation, Data Mining & Prospect Research Expert	$5k↓ 7%	Oct 2015Oct 24, 2015
Anna G. 🇲🇪🇲🇪 AI Business Analyst / Project Manager / Linguist	$3k↑ 31%	Mar 2023Mar 25, 2023
Jack K. 🇮🇪🇮🇪 Data Scientist \| Valuable Answers from Messy (Clinical) Data	$2k↑ 5%	Jan 2025Jan 20, 2025
4 Mohammed Arham S. 🇮🇳🇮🇳 Experienced Machine Learning Engineer \| Data Analyst	$2k↓ 15%	Mar 2023Mar 26, 2023
5 Lerato M. 🇿🇦 NewNew🇿🇦 Data Scientist specialising in Machine Learning & Predictive Analytics	$2k↑ 81%	Feb 2024Feb 25, 2024
6 Richey R. 🇺🇸🇺🇸 Data Cleaning & Validation Specialist \| CRM Imports & Reporting Prep	$2k↑ 37%	Sep 2022Sep 1, 2022
7 Ina P. 🇵🇭🇵🇭 Virtual Assistant	$2k↑ 8%	Nov 2022Nov 19, 2022
8 Jasur A. 🇰🇷🇰🇷 AI Engineer - RAG / ML / AI Chatbots, Agents, Automation, Optimization	$1k↓ 1%	Jul 2025Jul 23, 2025
9 David J. 🇲🇦🇲🇦 Data Entry & Research \| 80+ WPM Transcription	$1k↑ 2%	Jan 2024Jan 21, 2024
10 Clinton B. 🇪🇹🇪🇹 AI Engineer \| Computer Vision \| LLM \| RAG	$1k↑ 18%	Sep 2022Sep 18, 2022

Freelancer	MRR	Member since
11 Beter R. 🇪🇬🇪🇬 Power BI & Data Analytics \| Dashboards, BI Automation & Insights	$836↓ 18%	Oct 2023Oct 28, 2023
12 Tahir M. 🇵🇰🇵🇰 Data Engineer \| ETL Pipelines, Python, SQL,APIs & Reporting Automation	$781↑ 38%	Jul 2010Jul 8, 2010
13 Oleksandr V. 🇺🇦 NewNew🇺🇦 Cutting Edge Researcher \| Skilled Data Scientist \| AI Expert	$672↓ 25%	Mar 2025Mar 12, 2025
14 Fahed S. 🇯🇴🇯🇴 Artificial Intelligence (AI) \| Data \| Automation	$520↑ 2%	May 2017May 22, 2017
15 Michael F. 🇺🇸🇺🇸 Freelance Data Analysis, Research & Project Support Specialist	$464↑ 14%	Jan 2026Jan 24, 2026
16 Muhammad A. 🇵🇰Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Sep 25, 2026.🇵🇰 Data Entry Specialist, Researcher, Lead Generation, Virtual Assistant	≈$441–	Aug 2025Aug 29, 2025
17 Shivam S. 🇮🇳 NewNew🇮🇳 Data Cleaning, ML Dataset Prep Expert \| Python \| Pandas \| Scikit-learn	$424↓ 33%	Mar 2026Mar 31, 2026
18 Ismail P. 🇹🇷🇹🇷 Mobile & Backend Developer	$404↑ 25%	Nov 2021Nov 3, 2021
19 Abdelrhman S. 🇪🇬🇪🇬 Data Analyst \| Python, SQL, Excel \| Data Cleaning & AI Automation	$379↓ 3%	Mar 2022Mar 18, 2022
20 Rabia W. 🇵🇰🇵🇰 AI / ML Engineer \| Computer Vision & Document AI \| YOLO, OCR	$247↓ 38%	Aug 2023Aug 15, 2023

Freelancer	MRR	Member since
21 Md A. 🇧🇩 NewNew🇧🇩 Junior Data Analyst \| Excel Expert \| Admin Support \| Data Entry	$197↓ 22%	Dec 2024Dec 21, 2024
22 Mehwish M. 🇵🇰🇵🇰 Data Entry Specialist, Virtual \| Administrative Assistant	$194↓ 19%	Jul 2023Jul 26, 2023
23 Aryan P. 🇮🇳🇮🇳 AI Full Stack Developer \| AI/ML Engineer	$167↓ 20%	Jul 2022Jul 25, 2022
24 Charlene S. 🇵🇭🇵🇭 Project Documentation & Virtual Operations	$149↓ 1%	Nov 2021Nov 5, 2021
25 Stephanie M. 🇨🇴🇨🇴 Data scientist	$137↓ 15%	Jan 2026Jan 30, 2026
26 Ryan G. 🇺🇸🇺🇸 Data Cleaning, Research & AI Annotation Specialist	$130↓ 66%	Sep 2024Sep 16, 2024
27 Ammar S. 🇵🇰🇵🇰 Data Engineer \| Python \| SQL \| ML \| AI \| Data Analytics	$97↓ 25%	Aug 2023Aug 29, 2023
28 Lara P. 🇧🇷🇧🇷 Google Sheets & Automation \| Data Cleaning & Workflows	$72↓ 1%	Aug 2020Aug 7, 2020
29 Christian P. 🇺🇸🇺🇸 Data Scientist	$47↓ 65%	Nov 2025Nov 18, 2025
30 Muhammad H. 🇵🇰🇵🇰 Bookkeeping, QuickBooks Online /Data Entry Specialist, PDF to Excel	$41↓ 33%	Sep 2017Sep 24, 2017

Freelancer	MRR	Member since
31 Aleena D. 🇵🇰🇵🇰 Data Science specialist \| Python \| Excel \| Tableau \| Powerbi \|	$39↓ 56%	Jun 2023Jun 29, 2023
32 Montaha R. 🇹🇳🇹🇳 Data Science and software engineer	$37↓ 32%	Mar 2025Mar 8, 2025
33 Jakub P. 🇨🇿🇨🇿 Power BI Expert \| Microsoft Certified \| Data Analytics & AI	$31↓ 1%	May 2023May 6, 2023
34 Christian C. 🇺🇸🇺🇸 Data Scientist	$30↓ 19%	Sep 2020Sep 6, 2020
35 Valentin M. 🇦🇷🇦🇷 Market Researcher	$27↓ 16%	Mar 2024Mar 12, 2024
36 Ambar H. 🇩🇴🇩🇴 Bilingual Virtual Assistant \| Administrative Support \| Data Entry	$19↓ 1%	Aug 2022Aug 24, 2022
37 Aveen F. 🇶🇦🇶🇦 Senior Data Scientist \| AI Agent Engineer \| NLP & Azure ML Pipeline	$12↓ 1%	Sep 2020Sep 8, 2020
38 Ehtisham K. 🇵🇰🇵🇰 Data Analyst	$7–	Apr 2020Apr 11, 2020
39 Dima K. 🇺🇦🇺🇦 Data Specialist \| Excel, Web Research, PDF Conversion, Data Cleaning	$4–	Nov 2023Nov 26, 2023
40 Amine T. 🇫🇷Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.🇫🇷 AI App Developer \| Next.js, Python & FastAPI	≈$3–	Jan 2016Jan 14, 2016

Freelancer	MRR	Member since
41 Saad H. 🇵🇰🇵🇰 Excel \| Power BI \| Google Sheets \| SQL \| Expert Data Analyst	$2↓ 1%	Aug 2021Aug 20, 2021
42 Anjolaoluwa A. 🇳🇬🇳🇬 Power BI Expert \| 2x Microsoft Certified	$0–	Nov 2021Nov 29, 2021
43 Mahmoud M. 🇫🇷🇫🇷 Data scientist & AI Engineer	$0–	Nov 2023Nov 5, 2023
44 Andrii K. 🇺🇦🇺🇦 Python Developer	$0–	Feb 2016Feb 19, 2016
45 Md Aminul I. 🇧🇩🇧🇩 Geotechnical Engineer \| Data Entry, Processing & Automation Specialist	$0↓ 100%	Sep 2022Sep 5, 2022
46 Raul B. 🇪🇸🇪🇸 Data Scientist \| Gen AI \| GPT Expert \| NLP	$0–	Feb 2023Feb 2, 2023
47 TongTong L. 🇨🇳🇨🇳 Customer Service \| Sales \| Data Analysis \| Artificial Intelligence	$0–	Sep 2024Sep 23, 2024
48 Uttam B. 🇧🇩🇧🇩 IT Project Manager \| Web Development, Digital Marketing & Video	$0–	Nov 2013Nov 29, 2013
49 Yacine M. 🇨🇦🇨🇦 AI Engineer - LLM systems in production	$0–	Dec 2023Dec 24, 2023
50 Mahammad Rafiq S. 🇮🇳🇮🇳 US Property Records \| Deed Data Extraction\| CAMA Data\| Parcel Matching	$0–	Mar 2017Mar 5, 2017

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