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Vasyl S.

Vasyl S.

.NET Developer & API Integration Specialist

Bachelor of Engineering (B.Eng.) | Yuriy Fedkovych Chernivtsi National University, Ukraine I’m a .NET developer specializing in building reliable, production‑ready systems for e‑commerce, logistics, and workflow automation. I focus on backend engineering, API integrations, and deterministic data pipelines that keep operations stable and predictable. I build Windows services, DevExpress‑based desktop applications, API integrations, and SQL‑driven ingestion engines using C#, .NET, and SQL Server. My work includes deep integrations with Amazon SP‑API, Amazon Ads‑API, and other retail platform APIs, enabling automated workflows, real‑time data synchronization, and operational visibility across systems. I design systems that reduce manual work, improve operational reliability, and ensure data flows correctly between platforms. My approach is practical, engineering‑driven, and focused on long‑term maintainability — building solutions that behave consistently in real production environments.

🇺🇸Middletown, United States$35/hr90% JSS5.00 (4)Since Apr 2018

Earnings and projects

MRR
$1.8k

Last 6 months ÷ 6

World#25,003 / 412k
🇺🇸Country#5,281 / 62.1k
Revenue, last 30 days
$3.4k

Last 6 months: $11k

World#10,459 / 412k
🇺🇸Country#2,799 / 62.1k
Total earnings
$50k

Billed in all: $51k

World#76,365 / 412k
🇺🇸Country#13,817 / 62.1k
Per project
$12k

$5.5k in the last 6 months

World#11,990 / 412k
🇺🇸Country#2,077 / 62.1k
Projects, last 6 months
2
0% fixed100% hourly
World#88,918 / 412k
🇺🇸Country#11,762 / 62.1k
Projects in all
4

Across 6 contracts

17% fixed83% hourly
World#283,741 / 412k
🇺🇸Country#40,819 / 62.1k

Earnings, last 30 days

$51.2k+$3.4k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$46k$48k$50k$52kOct 8Oct 23Nov 7

Skill rankings: Top 4% in Google Docs

Ranked by MRR among everyone on Upwork with the skill.

  1. #9eBay API107 freelancers · 🇺🇸 #1Top 8%
  2. #19DevExpress181 freelancers · 🇺🇸 #1Top 10%
  3. #23VB.NET216 freelancers · 🇺🇸 #4Top 11%
  4. #33Transact-SQL326 freelancers · 🇺🇸 #12Top 10%
  5. #52Google APIs728 freelancers · 🇺🇸 #9Top 7%
  6. #81Google Sheets Automation1,085 freelancers · 🇺🇸 #17Top 7%
  7. #124ASP.NET Web API1,447 freelancers · 🇺🇸 #9Top 9%
  8. #127Desktop Application1,674 freelancers · 🇺🇸 #16Top 8%