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Usman Khan
@usmannisarkhan
Level 2
Mobile Application Developer
Pakistan
Francese, Inglese
Chi sono
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.
Competenze
Usman Khan
20 USD/ora
offline •
Tempo di risposta medio: 1 ora
Consulta i miei servizi
Sviluppo di app Android
I will develop your android app or be your android app developer
Personalizzazione di app mobile
I will integrate admob ads and facebook ads in your android app
Vuoi lavorare su base oraria?
Spiega a Usman Khan cosa ti serve.
20 USD
/
oraPortfolio
Esperienza lavorativa
Mobile Application Developer
9D Technologies • Full time
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 • Full time
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 • Full time
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 Recensioni
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Valutazione dettagliata
- Livello di comunicazione del venditore
- Qualità della consegna
- Valore della consegna
1-5 di 208 recensioni
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Più rilevante
mdp_sr
Stati Uniti
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
Francia
Rapidité, professionalisme, connaissance du codage permettant d'aller plus rapidement droit au résultat
Utile?
ezbzsolutions
Regno Unito
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
Emirati Arabi Uniti
Thanks for the work. I definitely recommend working with the freelancer.
Utile?
