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Seweryn K.
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Seweryn K.

Senior Windows and Cloud Administrator, Veeam Administrator

With over 15 years of extensive experience in the IT infrastructure domain, I am a Top Rated Plus Freelancer on Upwork, celebrated for delivering excellence across more than 100 projects globally. My expertise encompasses a broad spectrum of technologies, including cloud platforms such as Azure, GCP, and AWS, as well as mastery in Office 365 and Google Workspace, ensuring enhanced collaboration and operational efficiency. Throughout my career, I have excelled in roles such as CTO and Senior Infrastructure Engineer, showcasing a harmonious blend of strategic leadership and deep technical expertise. My portfolio includes sophisticated projects in Windows Server management, virtualization with VMware ESXi and Hyper-V, and implementing comprehensive backup solutions with Veeam Backup & Replication. I specialize in executing seamless migrations to cloud services, optimizing IT ecosystems for peak performance, and developing robust disaster recovery plans that guarantee business continuity. My commitment to operational excellence and compliance is evident in my successful leadership of SOC2 and HIPAA compliance initiatives. Armed with a Master’s degree in Computer Science and fluent English proficiency, I am prepared to confront and solve complex IT challenges, providing scalable, secure, and innovative solutions. I am dedicated to leveraging my extensive experience to contribute to the success of your next project, driving growth and technological advancement within your organization.

🇵🇱Opole, Poland$85/hr100% JSS4.99 (83)Since Sep 2015

Earnings and projects

MRR
$5.4k

Last 6 months ÷ 6

World#4,721 / 412k
🇵🇱Country#71 / 2,852
Revenue, last 30 days
—

Read daily since Nov 4, under 30 days

Total earnings
$377k

Billed in all: $393k

World#4,999 / 412k
🇵🇱Country#109 / 2,852
Per project
$2.9k

$2.7k in the last 6 months

World#57,972 / 412k
🇵🇱Country#562 / 2,852
Projects, last 6 months
12

Across 16 contracts

0% fixed100% hourly
World#14,023 / 412k
🇵🇱Country#108 / 2,852
Projects in all
132

Across 148 contracts

28% fixed72% hourly
World#18,960 / 412k
🇵🇱Country#137 / 2,852

Earnings, last 30 days

$393kNothing earned since Nov 4Billed in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$385k$390k$395k$400kNov 4Nov 6Nov 7

Tracked from Nov 4, 2026.

Skill rankings: Top 2% in VMware ESX Server

Ranked by MRR among everyone on Upwork with the skill.

  1. 3VMware ESX Server178 freelancers · 🇵🇱 #1Top 2%
  2. 3ConnectWise Automate81 freelancers · 🇵🇱 #1Top 4%
  3. #4Veeam115 freelancers · 🇵🇱 #1Top 3%
  4. #6Microsoft Hyper-V Server236 freelancers · 🇵🇱 #1Top 3%
  5. #9VMWare251 freelancers · 🇵🇱 #2Top 4%
  6. #10VMware Administration274 freelancers · 🇵🇱 #1Top 4%
  7. #15Amazon ECS543 freelancers · 🇵🇱 #2Top 3%
  8. #19Windows Server862 freelancers · 🇵🇱 #3Top 2%