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  1. Freelancers

Karsten Biniaś

Offer Karsten work on your next project.

Austria Austria
17 days 13 hours back
Available for hire available for hire
on the service 19 days 10 hours
Freelancer Karsten B. — Austria. Core skill — Desktop Apps, Databases & SQL

Rating

Successful projects
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Average rating
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Rating
243
Desktop Apps
185 place out of 471
Databases & SQL
301 place out of 1203

Language proficiency level

Deutsch Deutsch: intermediate
English English: pre-intermediate

Skills and abilities

Programming

Design & art

Services


Mobile development

Administration

Portfolio


  • 4659 USD

    RivaMarket

    Web Design
    RivaMarket — example of freelancer's portfolio work in category Web Design
    RivaMarket is a modern marketplace platform built from scratch using proprietary technology, enabling the sale of products between users in a marketplace model with an advanced system of accounts, payments, and logistics integrations.

    The project was designed and implemented comprehensively — from UX/UI, through frontend and backend, to external integrations and the admin panel.

    … Key features of the platform:

    - user registration and login system,
    - user profiles and seller panel,
    - publishing and managing listings,
    - "Boost" highlighting system increasing offer visibility,
    - Stripe payment integration and preparation for Przelewy24,
    - integration with Apaczka.pl and pickup point maps,
    - automatic shipment tracking,
    - importing listings from Vinted via a proprietary bot,
    - video feed of offers,
    - advanced admin panel,
    - accounting reports and data export,
    - Meta Pixel integration and product XML for advertising,
    - full desktop + mobile version.

    Everything was executed on proprietary code without using ready-made marketplace templates. The project was optimized for performance, further development, and scaling of the platform.

    Technologies:
    React / Next.js, TypeScript, Stripe Connect, PostgreSQL, API integrations, custom admin system.
  • 4077 USD

    Kwitly

    Mobile Apps Design
    Kwitly — example of freelancer's portfolio work in category Mobile Apps Design
    Kwitly is a free mobile application for Android and iOS, as well as a web panel at kwitly.cloud, that helps with household finances and organization: scanning receipts (OCR), searching purchases, reminders for returns, liability insurance, and vehicle inspections, shopping lists, and birthdays of loved ones. One account connects the app with the website.
  • 3494 USD

    BackOn.tv

    Mobile Apps Design
    BackOn.tv — example of freelancer's portfolio work in category Mobile Apps Design
    BackOn.Tv is an innovative mobile application that solves one of the most annoying problems of traditional television – long commercial breaks. The project combines the functionality of a modern TV program with a real-time smart notification system. Thanks to community engagement, users receive precise notifications about the end of commercials, allowing them to manage their time effectively. Key features: Data Crowdsourcing: Utilizing a community mechanism to monitor the status of program broadcasts. Smart Reminders: An intelligent system of alarms and reminders for favorite series. Real-time Notifications: Instant push notifications informing about the return of the main program to the air. Intuitive UI: A clear interface that facilitates navigation through channels and schedules.
  • 1165 USD

    Good Place Cottages

    Web Programming
    Good Place Cottages — example of freelancer's portfolio work in category Web Programming
    How to convey the atmosphere of tranquility, mountain climate, and childlike joy in the website's code? The project for "Domków Dobre Miejsce" was a challenge to transfer the emotions associated with vacations in Rabka-Zdrój to the screen of a monitor and smartphone. We created a service that "breathes". Thanks to a large amount of light (white space), carefully selected colors referencing nature, and the showcasing of professional photo sessions, the user feels the tranquility offered by the hosts from the very first second. The site not only informs but primarily encourages relaxation, prioritizing the comfort of parents and the joy of children. Technology: Responsive design, fast media loading, integration with external booking systems. Effect: Increase in direct online bookings and a professional brand image on social media thanks to cohesive digital identity.
  • 1398 USD

    Timelock

    Web Programming
    Timelock — example of freelancer's portfolio work in category Web Programming
    This is a modern online platform for which we created:
    - a fully responsive website (desktop, tablet, mobile)
    - fast, custom code optimized for SEO
    - a modern, minimalist design
    … - functionalities tailored to business needs
    Thanks to this, Timelock gained a website that not only looks great but also works perfectly and supports brand development.
  • 1165 USD

    Marketing-Fairy

    Web Programming
    Marketing-Fairy — example of freelancer's portfolio work in category Web Programming
    To nowoczesna strona internetowa dla agencji zajmującej się marketingiem online.
    W projekcie postawiliśmy na:
    - estetyczny, minimalistyczny design
    - przejrzystą strukturę i łatwą nawigację
    … - responsywność na każdym urządzeniu
    - wdrożenie autorskiego kodu i optymalizację SEO
    Dzięki temu Marketing-Fairy zyskało stronę, która nie tylko przyciąga uwagę, ale też skutecznie prezentuje ofertę i buduje zaufanie klientów.
  • 1398 USD

    Willa Hanusia - Rabka Zdrój

    Web Programming
    Willa Hanusia - Rabka Zdrój — example of freelancer's portfolio work in category Web Programming
    New project by DevStudioIT – Willa Hanusia
    We have just delivered a completely refreshed website for Willa Hanusia in Rabka-Zdrój.
    The project was built from scratch on our proprietary code — fast, stable, and optimized for SEO.