Jose Marrima
Senior Android Engineer | iOS Engineer | Kotlin Multiplatform (KMP) | Jetpack Compose & SwiftUI | High-Performance Mobile Architecture
download Download ResumeExperience
Android Engineer
May 2025 - Dec 2025 E. I. Medical Imaging • Loveland, Colorado
- Architected and led development of cross-platform medical imaging application from scratch.
- Designed complete mobile architecture using Compose Multiplatform, enabling single unified codebase for iOS and Android, reduced development costs by 20% and accelerated time-to-market.
- Engineered low-latency streaming system achieving <200ms latency for real-time ultrasound video using RTP/RTSP protocols and GStreamer pipelines.
- Built native performance modules using Kotlin Native, JNI, C and Android NDK.
- Owned entire mobile development lifecycle from architecture design, implementation, testing, to production deployment.
Compose Multiplatform KMP GStreamer Android NDK
Student Assistant – IT in Business Summer Program
March 2025 - May 2025 Colorado State University College of Business • Fort Collins, Colorado
- Taught AI, cybersecurity, and technology fundamentals to 40+ high school students.
- Designed and delivered curriculum on artificial intelligence, transfer learning, and machine learning fundamentals using Google's Teachable Machine.
- Mentored 40+ students throughout five-day immersive program.
Senior Android Engineer
March 2022 - Dec 2024 PAYBACK (part of American Express) • Germany
- Built features for Europe's #1 loyalty platform serving 34M+ users across 10+ countries.
- Spearheaded migration from XML to Jetpack Compose and RxJava to Coroutines.
- Architected and implemented shared business logic using Kotlin Multiplatform.
- Used Systrace to identify bottlenecks and optimized app performance.
- Conducted 15+ technical interviews and led onboarding for new engineers.
Kotlin Jetpack Compose KMP Coroutines Spring Boot
Software Engineer
Sept 2021 - Feb 2022 Emitu – IoT solutions • Portugal
- Developed backend solutions for IoT low-code framework and Smart Templates.
- Authored IoT integration scripts in JavaScript and C for sensor integration.
Spring Boot Kotlin IoT C
Freelance Software Engineer
March 2020 - Dec 2021 Self-employed
- Built custom Android applications for various clients, delivering end-to-end technical solutions.
Android Developer
Sept 2018 - July 2019 Tata Consultancy Services • Kolkata Area, India
- Developed features for Banking Android application serving millions of banking customers.
- Implemented MVVM architecture using Android Architecture Components and Data Binding.
- Utilized RxJava for reactive programming and asynchronous operations.
Java MVVM RxJava Dagger 2
Embedded Software Engineer Intern
May 2017 - Dec 2017 JAIST • Ishikawa, Japan
- Implemented AUTOSAR specifications for RTOS based on ITRON standard.
- Developed system calls for real-time operating system.
C AUTOSAR RTOS
Education
Master of Computer Information Systems
Colorado State University Aug 2024 - Dec 2025Bachelor’s Degree, Information and Communication Technology
Universiti Teknologi Petronas 2015 - 2018Technical Skills
Cross-Platform
Kotlin Multiplatform (KMP) Compose Multiplatform Shared Business Logic
Android
Jetpack Compose Coroutines Flow MVVM Dagger/Hilt Android NDK Material Design
iOS
SwiftUI Swift Combine MVVM
Performance & Streaming
Real-time video (RTP/RTSP) GStreamer Low-latency optimization Systrace
Architecture
MVVM Clean Architecture Modular Design Scalable Systems
Backend
Spring Boot Kotlin Java API Design GCP
Tools
Git Jira Confluence CI/CD
Languages
Portuguese Native
English Fluent