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Senior Mobile Software Engineer

Hi, I'm Roshan Reji K

Senior Mobile Software Engineer with 4+ years of experience delivering high-quality cross-platform mobile applications using React Native and TypeScript.

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About Me

Senior Mobile Software Engineer with 4+ years of experience delivering high-quality cross-platform mobile applications using React Native and TypeScript.

Strong expertise in Test-Driven Development (TDD), secure API integrations with token-based authentication, and App Store & Play Store deployments.

Experienced in Agile delivery, DevSecOps practices, and collaborating with senior architects to build scalable, secure, and maintainable mobile solutions.

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4+

Years Experience

15+

Mobile Apps & Projects

3

Tech Companies

10+

Core Skills

My expert
areas

I specialize in developing high-performance, cross-platform mobile applications using React Native, Expo, and TypeScript, ensuring native-level fluid UI and optimal performance across iOS and Android.

Strong expertise in Test-Driven Development (TDD), token-based authentication (JWT), state management (Redux Toolkit), and integrating complex REST and GraphQL APIs.

Experienced in performance tuning, reducing JavaScript bundle sizes by 30% and app startup times by 600ms using Datadog monitoring, Tamagui, and Reanimated.

Proficient in setting up CI/CD workflows, Fastlane automation, and managing seamless production deployments to both the Apple App Store and Google Play Store.

  • React Native

  • Expo

  • TypeScript

  • JavaScript (ES6+)

  • React.js

  • Redux Toolkit

  • GraphQL

  • Tamagui & Reanimated

  • Jest & RTL

  • Datadog & Mixpanel

  • Fastlane & CircleCI

  • REST APIs & Auth0

  • 04/2026 – CurrentCloudium Software - Kochi, India

    Senior Software Engineer

    • Refactored and optimized the React Native codebase to improve performance, maintainability, and scalability.
    • Reduced app startup time (by 600ms) and JavaScript bundle size (by 30%) through performance tuning.
    • Built reusable components and enhanced application stability across iOS and Android.
    • Utilized Datadog for application performance monitoring and crash analysis.
  • 11/2023 – 03/2026Apps Team Technologies Pvt. Ltd. - Kochi, Kerala

    Senior Software Developer

    • Delivered production-ready mobile applications using React Native and TypeScript within defined scope and timeline.
    • Followed Test-Driven Development (TDD) practices to ensure reliable, maintainable codebase.
    • Integrated mobile apps with secure backend APIs using token-based authentication (JWT-based systems).
    • Enhanced application performance and stability by 30% through optimized component rendering and state management.
    • Supported DevSecOps initiatives by contributing to CI/CD pipelines and secure release workflows.
  • 05/2022 – 11/2023CoStrategix - Bangalore, Karnataka

    Software Developer

    • Developed cross-platform mobile features using React Native following clean architecture practices.
    • Integrated REST APIs and implemented secure authentication flows.
    • Contributed to iterative software releases in an Agile development environment using React Native and TypeScript.
    • Collaborated with QA and DevOps teams to improve release quality and operational efficiency.
  • 11/2021Kuvempu University - Shimoga

    Bachelor's Degree (GPA: 7.86)

  • count+

    Years Experience

  • count+

    Mobile Apps & Deployments

  • count

    Tech Companies

  • countms

    Startup Time Improvement
Roshan Reji K

Let's work together

Let's embark on this journey together, where your objectives become our mission, and our collaborative efforts pave the way for your business triumph.

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