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Usman Khan
@usmannisarkhan
Level 2
Mobile Application Developer
Paquistão
Francês, Inglês
Sobre mim
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.
Habilidades
Usman Khan
US$ 20/hora
offline •
Tempo médio de resposta: 1 hora
Conheça meus serviços
Desenvolvimento de Aplicativos Android
I will develop your android app or be your android app developer
Personalização de aplicativos móveis
I will integrate admob ads and facebook ads in your android app
Quer trabalhar com remuneração por hora?
Diga a Usman Khan o que você precisa.
US$ 20
/
horaPortfólio
Experiência profissional
Mobile Application Developer
9D Technologies • Período integral
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 • Período integral
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 • Período integral
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 Avaliações
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1-5 fora das 208 avaliações
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mdp_sr
Estados Unidos
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.
Útil?
pdelaunay78
França
Rapidité, professionalisme, connaissance du codage permettant d'aller plus rapidement droit au résultat
Útil?
ezbzsolutions
Reino Unido
Thank you Usman for your great piece of work, highly recommended
Útil?
usmanmehmood527
Paquistão
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!
Útil?
mrmohdr
Emirados Árabes Unidos
Thanks for the work. I definitely recommend working with the freelancer.
Útil?
