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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
25 $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.
25 $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.
209 Avis
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Les plus pertinents
pdelaunay78
Client récurrent
France
Utile?
pdelaunay78
Client récurrent
France
Rapidité, professionalisme, connaissance du codage permettant d'aller plus rapidement droit au résultat
Utile?
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?
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?
