Samuel Karanja

Available to hire

I'm Samuel Karanja, a Senior Mobile Engineer focused on Android with 9+ years of experience delivering fast, secure, scalable mobile apps.

About

I’m Samuel Karanja, a Senior Mobile Engineer focused on Android with 9+ years of experience delivering fast, secure, scalable mobile apps. I specialize in Kotlin, Jetpack Compose, MVVM, and Clean Architecture, and I leverage modern DevOps practices to ship high-quality solutions across fintech, e-commerce, and real estate domains. I enjoy turning complex requirements into robust, maintainable mobile experiences and mentoring teammates to grow their engineering skills.

I thrive in cross-functional environments, value clean code and continuous learning, and I’m comfortable with REST APIs, offline-first design, CI/CD, and end-to-end app lifecycle management. I continuously explore new technologies to keep apps production-ready and reliable, while focusing on performance, security, and great user experiences.

  • Joined November 2024

Industry experience

  • Financial Services
  • Real Estate & Construction
  • Transportation & Logistics
  • Software & Internet
  • Agriculture & Mining
  • Consumer Goods
  • Professional Services
  • Retail
  • Media & Entertainment

Projects · 2

During my time at Homie, one of Andela’s partners, I played a crucial role in developing the company’s Android application. This app revolutionized the home buying and selling process by seamlessly integrating experienced local real estate professionals with cutting-edge technology.

Key Contributions:

Feature Development: Led the design and implementation of key features that enhanced user experience and engagement. Collaborated closely with marketing and design teams to identify opportunities for improvement, resulting in an increase in user engagement and a significant boost in revenue.

Cross-Functional Collaboration: Fostered strong partnerships with various teams to ensure alignment on business goals. This collaborative approach allowed for the rapid iteration of features based on user feedback and market trends.

Mentorship and Code Reviews: Conducted thorough code reviews and provided mentorship to junior engineers, ensuring adherence to coding standards and best practices. This initiative not only improved code quality but also accelerated the onboarding process for new team members.

Impact on Business Outcomes: Directly contributed to increased user traffic and enhanced sales of homes through the application. By implementing data-driven enhancements, I helped the team achieve a rise in transactions facilitated through the app.

Through these efforts, I significantly advanced Homie’s mission to make homeownership more accessible, demonstrating a strong commitment to leveraging technology to drive meaningful change in the real estate industry.

  • App Developer
  • Front-End Developer

I utilized my expertise to help Banque Misr in creating their internal mobile app for use by loan officers.

Some of my main contributions were:

Built the main functions of the mobile app to ensure strong performance and reliability in real-world situations, which streamlined the loan processing workflow.
Provided technical leadership by conducting thorough code reviews for a team of mobile engineers, offering helpful feedback and promoting a culture of continuous improvement. This guidance resulted in better code quality and fewer bugs during testing.
Collaborated closely with cross-functional teams, such as backend developers and UX designers, to integrate RESTful APIs and create a unified application architecture.
Through these efforts and others, I significantly improved the operational efficiency of loan officers, demonstrating a dedication to using technology to create meaningful solutions in the banking sector.

  • App Developer
  • Front-End Developer

Work experience· 20 roles

Senior Mobile Engineer · Kanalight KenyaJun 2025 – Sep 2025 · 4 mos

Developed a high-performance eCommerce app using Flutter (Dart), implementing BLoC, GetX, and Provider for state management. Integrated RESTful APIs and Isar DB for offline-first functionality, ensuring seamless user experience. Optimized CI/CD pipelines for automated testing/deployment, improving release efficiency. Mentored junior developers in Flutter best practices and clean architecture.

Senior Mobile Engineer · KanalightJun 2025 – Sep 2025 · 4 mos

Developed a high-performance eCommerce app using Flutter (Dart), implementing BLoC, GetX, and Provider for state management. Integrated RESTful APIs and Isar DB for offline-first functionality, ensuring seamless user experience. Optimized CI/CD pipelines for automated testing/deployment, improving release efficiency. Mentored junior developers in Flutter best practices and clean architecture.

Senior Mobile Engineer · Kanalight KenyaJun 2025 – Sep 2025 · 4 mos

Developed a high-performance eCommerce app using Flutter (Dart), implementing BLoC, GetX, and Provider for state management. Integrated RESTful APIs and Isar DB for offline-first functionality, ensuring seamless user experience. Optimized CI/CD pipelines for automated testing and deployment, improving release efficiency. Mentored junior developers in Flutter best practices and clean architecture.

Senior Mobile Engineer · Kanalight KenyaJun 2025 – Sep 2025 · 4 mos
Android Engineer · AndelaDec 2023 – Sep 2025 · 1 yr 10 mos
Senior Android Engineer · Andela — Remote (Client: Banque Misr, Egypt)Dec 2023 – Sep 2025 · 1 yr 10 mos
Senior Android Engineer · AndelaDec 2023 – Sep 2025 · 1 yr 10 mos
Senior Android Engineer · AndelaDec 2023 – Sep 2025 · 1 yr 10 mos

Education· 5

Bachelor of Computer Science · St Paul University2015 – 2022
Computer Science · St Paul University2013 – 2022
Computer Science · St Paul University2013 – 2022
Computer Science · St Paul University2013 – 2022

Certifications and awards· 5

ALC Certificate2018
Google Associate Android Developer (AAD)2030 – 2025
Google Associate Android Developer (AAD)2030 – 2025
Google Associate Android Developer (AAD)2030 – 2025

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