Find the World's Best Freelancers

Upwork is the leading online workplace, home to thousands of top-rated assistants. It’s simple to post your job and get personalized bids, or browse Upwork for amazing talent ready to work on your Operating Systems Development project today.

Browse Freelancers
OpenTable Logo
Pinterest Logo
Unilever Logo
Panasonic Logo
NBC Logo
Lea N. - Data Entry/Data Specialist/Web Researcher

Lea N.

Data Entry/Data Specialist/Web Researcher

$5/hr
9,518 hours
Philippines
100% JOB SUCCESS
“Lea was amazing, he completed all tasks incredibly quickly, he was always available and always made an effort to deliver OUTSTANDING quality work. Thank you so much for the incredible...”
  • Data Encoding
  • Data Entry
Crispina S. - Data Entry Professional/Web Researcher

Crispina S.

Data Entry Professional/Web Researcher

$5.56/hr
14,905 hours
Philippines
100% JOB SUCCESS
“Thank you for taking the gDev Cognitive Test. I regret to inform you that your score did not meet our requirement. I will be ending your assignment and releasing your payment...”
  • HTML
  • Microsoft Word
Shane A. - Experienced Sports Writer

Shane A.

Experienced Sports Writer

$11.11/hr
157 hours
Philippines
100% JOB SUCCESS
“Shane produced consistent work. Would be happy to have him back on my team in the future.”
  • Article Writing
  • Accounting
Fahad P. - FINANCE AND ACCOUNTING SPECIALIST

Fahad P.

FINANCE AND ACCOUNTING SPECIALIST

$22.22/hr
46 hours
Pakistan
100% JOB SUCCESS
“Fahad is an expert and financial modeling and I will work with him again. He is fluent in English. He is a high level critical thinker. All in all a great experience.”
  • Financial modeling
Muhammad A. - Android, Web and Cross-Plateform Developer

Muhammad A.

Android, Web and Cross-Plateform Developer

$10/hr
159 hours
Pakistan
100% JOB SUCCESS
“I've lost count how many times I have worked with Muhammad Aqib Khan! He continues to go above and beyond my expectations and I really hope that we can work together again in...”
  • Adobe Photoshop
  • Web design
Sarah M. - Administrative Support

Sarah M.

Administrative Support

$8.89/hr
3,213 hours
Kenya
100% JOB SUCCESS
“Did a good job on tasks assigned. Will look to hire again.”
  • Administrative Support
Roshan B. - Data Entry Professional

Roshan B.

Data Entry Professional

$7.74/hr
270 hours
Sri Lanka
100% JOB SUCCESS
“Great freelancer! Roshan was a clear communicator and turned the project around quickly - even faster than I needed. Would definitely recommend!”
  • Data Entry
  • Microsoft Excel
Lora Y. - Citation Specialist and Web Research

Lora Y.

Citation Specialist and Web Research

$16.67/hr
4,987 hours
Bulgaria
100% JOB SUCCESS
“Lora is great! We hope to work with her again in the future.”
  • Internet research
Evgheni P. - Senior PHP Developer (10+ years experience)

Evgheni P.

Senior PHP Developer (10+ years experience)

$25/hr
40 hours
Moldova
100% JOB SUCCESS
“Top quality freelancer, excellent communication skills and very hard-working. Always available to speak on Skype and can come up with his own ideas and opinions to assist the project. I...”
  • Zend Framework
  • PHP
  • Git
  • HTML
Eunice S. - Seasoned SEO Copywriter

Eunice S.

Seasoned SEO Copywriter

$6.67/hr
2,068 hours
Philippines
100% JOB SUCCESS
“Eunice has completed a number of content writing projects for us now, and we have been pleased with the finished result. Thanks Eunice.”
  • Copywriting
  • Copy editing
Manuel F. - Translator ENG-SPA(MEX)

Manuel F.

Translator ENG-SPA(MEX)

$16/hr
0 hours
Mexico
100% JOB SUCCESS
“Thanks!”
  • Proofreading
  • Editing

To view more
profiles,
join Upwork

What our customers are saying


Bring your idea to life with a Operating Systems Development freelancer now

Get Started