l
luka_nikolac

Luka N

@luka_nikolac
5.0(3)

Software developer

Croatia
English, Croatian
About me
I'm a full-stack developer skilled in React (JavaScript/TypeScript) and .NET Core Web API. I build modern, responsive web applications with secure and well-structured backends, ensuring efficient integration between front-end and back-end. In addition, I specialize in PowerPoint, creating and redesigning presentations with clean, professional and visually appealing slides. Ideal for startups, businesses, and students who need reliable web solutions or high-quality presentations.... Read more

Skills

l
luka_nikolac
Luka N
Offline • 

See my services

API & Integrations
I will create restful apis using asp net core for integrations
5.0(3)
Figma to Web & App
I will create responsive react app using the provided figma design

Portfolio

Work experience

Fiverr

Software developer Subris GmbH

Fiverr • Freelance

Aug 2025 - Present10 mos

* Modernized a legacy ASP.NET WebForms system into a RESTful .NET 8 Web API. * Migrated codebase from VB.NET to C#, improving maintainability, scalability, and security. * Migrated SOAP services to RESTful .NET 8 APIs. Refactored VB.NET → C# with clean architecture principles. * Modernized reporting workflows (Crystal Reports integration). * Improved performance, logging, and error handling. * Upgraded security (auth, secure configs, data protection).

3 Reviews
5.0

(3)
(0)
(0)
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Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    5
1-3 out of 3 Reviews
Sort By
Most relevant
    D

    danisute

    Repeat Client

    CH

    Switzerland

    5

    Perfect Work.

    $200-$400

    Price

    2 months

    Duration

    gig

    API & Integrations

    Helpful?
    Yes
    No
    D

    danisute

    Repeat Client

    CH

    Switzerland

    5

    Outstanding developer! Very reliable, proactive, and delivers clean and well structured code. Communication was clear and professional throughout. Highly recommended

    Up to $50

    Price

    7 days

    Duration

    gig

    API & Integrations

    Helpful?
    Yes
    No
    D

    danisute

    Repeat Client

    CH

    Switzerland

    5

    Outstanding developer! Delivered high-quality work quickly and with great attention to detail. Excellent communication, very professional, and went above and beyond to ensure everything was perfect. Highly recommended!

    $200-$400

    Price

    3 weeks

    Duration

    gig

    API & Integrations

    Helpful?
    Yes
    No