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Usman Khan
@usmannisarkhan
Level 2
Mobile Application Developer
Pakistan
Français, Anglais
À propos de moi
Hi, I’m Usman an experienced Android app developer with 5+ years of expertise in Java and Kotlin. I have worked on utility apps with 200M+ global downloads, including QR scanners, PDF scanners, camera apps, and GPS/location-based apps. I specialize in creating custom Android applications with modern UI/UX, smooth performance, and bug-free code. From Firebase, APIs, Ads, and In-App Purchases to Google Maps and authentication systems, I deliver high-quality, scalable mobile apps.
Feel free to contact me for services.
Compétences
Usman Khan
20 $US/heure
hors ligne •
Temps de réponse moyen de 1 heure
Voir mes services
Développement d'applis Android
I will develop your android app or be your android app developer
Personnalisation de l'application mobile
I will integrate admob ads and facebook ads in your android app
Vous souhaitez travailler sur une base horaire ?
Dites à Usman Khan ce dont vous avez besoin.
20 $US
/
heurePortfolio
Expérience professionnelle
Mobile Application Developer
9D Technologies • Temps plein
Oct 2024 - Aug 2025 • 10 mos
• Architected in-app billing and ad mediation for 50+ apps, driving a 30% increase in total revenue. • Engineered reusable billing and advertising SDKs, significantly reducing integration time company-wide. • Managed large-scale updates and performance tuning for high-traffic applications totaling 200M+ downloads. • Mentored junior developers and spearheaded code reviews to ensure adherence to Clean Architecture.
Mobile Application Developer
Innovative Inside • Temps plein
May 2024 - Oct 2024 • 5 mos
• Led full-cycle Android development utilizing Kotlin, Jetpack, MVVM and Clean Architecture. • Improved app ratings from 3.8 to 4.6+ by identifying and resolving performance bottlenecks and enhancing the UX. • Successfully published 5+ applications maintaining an average user rating of 4.5+.
Mobile Application Developer
9D Technologies • Temps plein
Feb 2023 - May 2024 • 1 yr 3 mos
• Developed complex mobile features using MVVM, Clean Architecture, and CameraX. • Boosted daily user retention by 35% through targeted feature updates and performance optimizations. • Integrated Firebase suite (Analytics, Crashlytics, Performance, Remote Config) to monitor and enhance app stability and responsiveness.
208 Avis
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Les plus pertinents
mdp_sr
États-Unis
Exceptional work and he made sure we were on the same page as what was needed, and worked with me on the app development as needed and I am truly impressed with the speed and quality of work! Excellence! and recommend for your AD mob project for your google play app development.
Utile?
pdelaunay78
France
Rapidité, professionalisme, connaissance du codage permettant d'aller plus rapidement droit au résultat
Utile?
ezbzsolutions
Royaume-Uni
Thank you Usman for your great piece of work, highly recommended
Utile?
usmanmehmood527
Pakistan
Excellent communication and a deep understanding of the project requirements. The freelancer was very patient with revisions and ensured everything was perfect. I will definitely hire again!
Utile?
mrmohdr
Émirats Arabes Unis
Thanks for the work. I definitely recommend working with the freelancer.
Utile?
