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Fiverr Pro
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Radek Kowalczyk
@mythosbeats
Frontend Developer
Pologne
Anglais, Polonais
À propos de moi
I am a Mobile Developer with experience in building and maintaining Android and cross-platform applications.
My core stack includes:
• React Native
• Native Android (Java, XML)
• Databases and backend communication
I focus on production-ready solutions — not templates or quick hacks.
I help businesses:
• Fix and maintain existing mobile apps
• Improve performance and stability
• Integrate APIs and backend systems
• Refactor legacy Android projects
• Build scalable MVPs for real users
If you’re looking for someone who treats your app like a real product — let’s talk.
Compétences
Radek Kowalczyk
hors ligne •
Voir mes services
Correction de bugs
I will fix bugs errors and crashes in your react nextjs app
Sites Web personnalisés
I will improve speed and performance of your react nextjs website
Portfolio
Expérience professionnelle
Fullstack Developer
Visiblify Fabrique • Temps partiel
Jul 2025 - Present • 10 mos
Experienced with React, React Native, native Android (Java), and backend integrations. I build and maintain production-ready applications with clean architecture, scalable APIs, and reliable database design. From frontend UI to backend logic and deployment — I handle the full development cycle with a focus on performance, stability, and long-term maintainability.
IT Specialist / Web Developer
IT Specialist / Web Developer • Temps plein
May 2024 - Dec 2024 • 7 mos
Creation and management of the company website and B2B system, implementation of UX/UI improvements, and ongoing SEO optimization and responsiveness maintenance. Handling Helpdesk tickets and providing IT support to internal users across all technical areas. Administration and maintenance of network infrastructure and IT hardware.
BackOffice Support / Frontend Support
WeWorkOffice • Temps plein
Nov 2022 - Mar 2024 • 1 yr 4 mos
Redesign of the company website, content implementation, performance optimization, and layout updates aligned with brand guidelines. Email and phone communication with domestic and international business partners. Preparation of commercial offers and business proposals.
13 Avis
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Professional and easy to work with, thanks
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Talented and professional. Thank you!
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FANTASTIC! Exactly what I was looking for, and the communication was great. Will be using again in the very near future. Thank you very much :)
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marilynsinatra2
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Very patient with me and worked hard to deliver a beat to my taste. Would definitely recommend again
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elischafer905
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this seller was good with communication and very pleasant to talk with
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