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Eli K.
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Eli K.

Headless E-Commerce Specialist | React/Next.js & .NET Core

Over 10k earned and 900+ hours logged on Upwork with 4 years of experience in software development. Slow e-commerce sites lose up to 40% of their conversions due to poor page load speeds. I build headless, high-performance e-commerce storefronts using React/Next.js and .NET Core that load instantly, scale flawlessly and maximize your checkout conversions. Traditional methods are sluggish, rigid and hard to customize. By decoupling your frontend visual layer from your complex backend logic, I give your business total design freedom on the web without sacrificing backend processing power or security. Send me a message if you are interested in having a reliable developer who can deliver on deadlines as well as communicate frequently. My workflow has AI integrated in it which means I can deliver quicker than traditional methods. However, the output is tested and ensured that it delivers. Edge cases on unit testes can confirm this. If you like what you are hearing so far shoot me a message and we can discuss your project 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀 Full-Stack .NET Developer, Backend .NET Developer, ASP .NET Core, C#, ASP .NET MVC, Web API, RESTful APIs, Microservices, Clean Architecture, SignalR, Blazor Server, Blazor WebAssembly, Razor Pages, Angular, React, Responsive Web Design, HTML5, CSS3, JavaScript, Bootstrap, SQL Server, Amazon SP-API, SOAP API, Query Optimization, Stored Procedures, Database Optimization, Entity Framework Core, Database Migration, Legacy System Migration, Web Forms Migration, Performance Optimization, Azure, Azure DevOps, AWS, CI/CD Pipelines, Docker, IIS, Agile Development

🇩🇪Berlin, Germany$25/hr100% JSS5.00 (7)Since Jul 2025
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Earnings and projects

MRR
$1.7k

Last 6 months ÷ 6

World#27,960 / 412k
🇩🇪Country#199 / 3,842
Revenue, last 30 days
$504

Last 6 months: $10k

World#62,543 / 412k
🇩🇪Country#404 / 3,842
Total earnings
$16k

Billed in all: $17k

World#157,364 / 412k
🇩🇪Country#1,210 / 3,842
Per project
$1.8k

$5.1k in the last 6 months

World#83,593 / 412k
🇩🇪Country#634 / 3,842
Projects, last 6 months
2
50% fixed50% hourly
World#88,922 / 412k
🇩🇪Country#715 / 3,842
Projects in all
9

Across 13 contracts

77% fixed23% hourly
World#212,271 / 412k
🇩🇪Country#1,898 / 3,842

Earnings, last 30 days

$17k+$504 earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$16k$17k$18kOct 9Oct 24Nov 8

Skill rankings: Top 7% in Ecommerce Website

Ranked by MRR among everyone on Upwork with the skill.

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  6. #262ASP.NET2,819 freelancers · 🇩🇪 #1Top 9%
  7. #296Microsoft SQL Server2,759 freelancers · 🇩🇪 #1Top 11%
  8. #309.NET Framework2,944 freelancers · 🇩🇪 #1Top 10%