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.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $11k
Billed in all: $51,215$51k
$5.5k in the last 6 months
Across 6 contracts
Earnings, last 30 days
Skill rankings: Top 4% in Google Docs
Ranked by MRR among everyone on Upwork with the skill.
- #9eBay API107 freelancers · 🇺🇸 #1Top 8%🇺🇸#1 of 5
- #19DevExpress181 freelancers · 🇺🇸 #1Top 10%🇺🇸#1 of 9
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- #33Transact-SQL326 freelancers · 🇺🇸 #12Top 10%🇺🇸#12 of 70
- #52Google APIs728 freelancers · 🇺🇸 #9Top 7%🇺🇸#9 of 73
- #81Google Sheets Automation1,085 freelancers · 🇺🇸 #17Top 7%🇺🇸#17 of 102
- #124ASP.NET Web API1,447 freelancers · 🇺🇸 #9Top 9%🇺🇸#9 of 79
- #127Desktop Application1,674 freelancers · 🇺🇸 #16Top 8%🇺🇸#16 of 170