Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I'm Walter Ademiluyi, a dynamic mobile engineer with over 13 years of experience delivering native and cross-platform mobile apps. I specialize in React Native, Kotlin Multiplatform, Kotlin, Java, Swift, and PHP, with a proven track record of boosting performance and user experience across complex enterprise projects. I've led and shipped major initiatives—from iCasino on Fanatics to the car UI for SiriusXM—driving security, scalability, and pixel-perfect UI aligned with designs. I enjoy collaborating with product, design, and engineering teams to translate ambitious requirements into robust, maintainable code that ships at scale.…I'm Walter Ademiluyi, a dynamic mobile engineer with over 13 years of experience delivering native and cross-platform mobile apps. I specialize in React Native, Kotlin Multiplatform, Kotlin, Java, Swift, and PHP, with a proven track record of boosting performance and user experience across complex enterprise projects. I've led and shipped major initiatives—from iCasino on Fanatics to the car UI for SiriusXM—driving security, scalability, and pixel-perfect UI aligned with designs. I enjoy collaborating with product, design, and engineering teams to translate ambitious requirements into robust, maintainable code that ships at scale.

Walter Ademiluyi

Full Stack Developer, Web Developer, App Developer, +3





I'm Walter Ademiluyi, a dynamic mobile engineer with over 13 years of experience delivering native and cross-platform mobile apps. I specialize in React Native, Kotlin Multiplatform, Kotlin, Java, Swift, and PHP, with a proven track record of boosting performance and user experience across complex enterprise projects. I've led and shipped major initiatives—from iCasino on Fanatics to the car UI for SiriusXM—driving security, scalability, and pixel-perfect UI aligned with designs. I enjoy collaborating with product, design, and engineering teams to translate ambitious requirements into robust, maintainable code that ships at scale.…I'm Walter Ademiluyi, a dynamic mobile engineer with over 13 years of experience delivering native and cross-platform mobile apps. I specialize in React Native, Kotlin Multiplatform, Kotlin, Java, Swift, and PHP, with a proven track record of boosting performance and user experience across complex enterprise projects. I've led and shipped major initiatives—from iCasino on Fanatics to the car UI for SiriusXM—driving security, scalability, and pixel-perfect UI aligned with designs. I enjoy collaborating with product, design, and engineering teams to translate ambitious requirements into robust, maintainable code that ships at scale.

Available to hire

I’m Walter Ademiluyi, a dynamic mobile engineer with over 13 years of experience delivering native and cross-platform mobile apps. I specialize in React Native, Kotlin Multiplatform, Kotlin, Java, Swift, and PHP, with a proven track record of boosting performance and user experience across complex enterprise projects.

I’ve led and shipped major initiatives—from iCasino on Fanatics to the car UI for SiriusXM—driving security, scalability, and pixel-perfect UI aligned with designs. I enjoy collaborating with product, design, and engineering teams to translate ambitious requirements into robust, maintainable code that ships at scale.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Work Experience

Staff Kotlin Engineer (Android) at Fanatics (iCasino Start-up)

October 1, 2025 - October 1, 2025

Forged relationships with Product, Design, and Contracting teams; resolved long-standing iCasino issues; mentored team members; eliminated jank and loading delays; implemented pixel-perfect UI from Figma across Android and other platforms.

Senior Full-Stack Android Engineer (Freelance) at FTX

June 1, 2025 - June 1, 2025

Full-stack architect of a white-label fitness training session management app with scheduling and exercise reports; designed in Kotlin Multiplatform for Desktop and Web; desktop UI with Compose Hot Reload; API using PHP and MySQL; migrated app tech from Hilt/ Retrofit to Koin/ Ktor for KMP.

Staff Android Engineer at SiriusXM

March 1, 2025 - March 1, 2025

Engineered custom controls and features in Kotlin with Jetpack Compose; implemented a 6-slot channel ordering feature; authored UI for backend modals; resolved ANRs related to background services, memory leaks, and performance; supported OEM integrations.

Senior Android Developer at KITEWIRE LLC.

March 1, 2023 - March 1, 2023

Led headless Steel Talon Android app development, ensuring FBI compliance; extended contract; developed private-sector version with Jetpack Compose UI; improved data transmission reliability and reduced upload failures; implemented push health checks and PostgreSQL partitioning; built live FBI agent device location tracking using JavaScript and ColdFusion API.

Senior Android Developer (freelance) at Plantarion LLC (Start-up)

November 1, 2020 - November 1, 2020

Modernized Plantarion mobile app by porting from Java to Kotlin; added new validation rules for date, username, and password; improved user experience and maintained code quality.

Senior Full-Stack React Native/Android/iOS Developer (freelance) at HiitFITTV Media and Communications LLC

October 1, 2024 - October 1, 2024

Designed and developed the full-stack React Native iOS app with gamified leaderboards; integrated Bluetooth sampling with Apple Watch and Android Wear; built friend invites feature; backend in PHP/MySQL; deployed to App Store via FastLane.

Senior Android Developer at Berryville Holdings LLC

April 1, 2020 - April 1, 2020

Redesigned Jerboa white-label Android app using MVP; built chat and file-sharing native apps; integrated Mattermost plugins; contributed to end-to-end encryption patent; used Dagger and LeakCanary for reliability.

Senior Android Developer at Prepaid Wireless Group

September 1, 2017 - September 1, 2017

Led design and development of AdTime/Cintex Wireless Android apps; achieved 1M+ downloads; mentored a junior; accelerated conversion from credits to minutes; deployed three apps to Google Play; produced white-label version; utilized OpenGL for 3D coin UI.

Senior Android Developer at Cobrain (startup)

February 1, 2015 - February 1, 2015

Launched Cobrain Android app; built product collection thumbnail generation using NodeJS and ImageMagick; extended API to query Solr; implemented infinite scrolling tab view; cached images with LRU.

Android Developer (contract) at A2Z, Inc.

October 1, 2013 - October 1, 2013

Redesigned ChirpE event map to reduce OOM; implemented large bitmap panning, multi-threading, and region decoding; migrated activities to fragments for better tablet UI.

Senior Developer (freelance) at CheckWaitTimes, LLC (startup)

December 1, 2011 - December 1, 2011

Designed full-stack Android Gingerbread/Jelly Bean app using Maps/Places API; built a VB.NET web service and .NET/ASP front-end; delivered localized wait times for cafes and attractions.