Vivek Pratap Singh · androidguru.in
10+ Years Building Scalable Android Applications
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About
Vivek is a Senior Android Developer with 10 years of experience building Android applications across healthcare, news, retail, payments, enterprise mobility, insurance, e-commerce, and automotive products. His work spans Java, Kotlin, Jetpack Compose, Jetpack Components, React Native, TypeScript, MVVM, clean architecture, Firebase, CI/CD, and strong testing with JUnit, Mockito, MockK, and Espresso.
10 years of Android experience with Java and 5+ years building Kotlin apps
3 production projects using Jetpack Compose and modern Jetpack Components
6+ years of unit and UI testing experience with JUnit, Mockito, MockK, and Espresso
Product engineering experience with CVS Health, The Straits Times, Walmart, PayPal, SOTI, Roadzen, Mirraw, and Carwale
4+ years of React Native experience with TypeScript, Redux, React Query, Firebase, and Expo
Won Best Developer Award at Mirraw and helped increase app downloads for Mirraw and Carwale
Experience
May 2025 - December 2025
Photon Interactive / CVS Health
CVS Health, America Client
Worked for CVS Health, America client, writing clean and reusable Kotlin code.
Developed PayPal checkout integration with unit test coverage.
Added unit tests for 20% of existing ViewModels and built UI tests with Espresso and MockK.
Fixed critical production bugs that improved the overall user experience.
April 2023 - December 2023
SPH Singapore / The Straits Times
The Straits Times Mobile App
Built MyST feature using Jetpack Compose for The Straits Times mobile app.
Built onboarding and sign-in flows for a trusted Singapore news application.
Reviewed code, wrote reusable Kotlin, and developed UI and functional tests with Espresso and Mockito.
Used REST APIs, RxJava, and Coroutines to fetch data and update app UI reliably.
August 2021 - September 2022 (1 yr 1 mo)
Walmart / ASDA Groceries Shopping
ASDA Groceries Shopping
Built splash screen following the latest Android guidelines.
Conceptualized Clothing Essential flow and reviewed code across the team.
Fixed production bugs that improved the overall app rating.
Developed UI and functional tests with Espresso, Mockito, and MockK.
September 2020 - August 2021 (1 yr)
PayPal / Send and Receive Money
PayPal Send and Receive Money
Built Add Address flow and developed PPCC details features.
Fixed production bugs that improved app rating and stability.
Used RoomDB for local storage and signature-based permissions for app security.
Developed UI and functional tests with Espresso and Mockito.
September 2019 - August 2020 (1 yr)
SOTI
SOTI Surf
Built Settings flow and Home Screen with popup menu for SOTI Surf.
Integrated FCM notifications and used Jetpack ViewModel and LiveData.
Used signature-based permissions for securing the app.
Wrote functional unit tests using Mockito.
September 2018 - September 2019 (1 yr)
Roadzen
VIA - For auto inspections / SureTrip
Built SureTrip app from scratch and worked on VIA for auto inspections.
Developed apps using MVVM architecture and Coroutines.
Used Jetpack Paging, ViewModels, and RoomDB.
Built a custom camera for detecting dents and integrated FCM notifications.
June 2016 - September 2018 (2 yrs 4 months)
Mirraw (Previously known as Groomefy Pvt Ltd)
Mirraw - Online Shopping App
Built Mirraw online shopping app from scratch.
Increased app downloads by 70% and won Best Developer Award.
Developed the app using MVVM architecture and integrated FCM notifications.
Built custom camera for detecting face points and face parts.
January 2015 - June 2016 (1 yr 6 months)
Carwale (Payroll of Craterzone Pvt Ltd)
Carwale Android App
Fixed production bugs and stabilized the app from crashes.
Increased app downloads by 20%.
Developed the app using MVVM architecture and Material Design guidelines.
Built the mechanism to upload photos to the server.
Skills
Mobile Core
Modern UI
Language
Concurrency
Reactive
DI
Persistence
Backend
Cross Platform
Web/Mobile
API
Delivery
Quality
Architecture
Architecture
Scale
Projects
mobile/live-chat-application
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React Native project from resume
A React Native Firebase chat app supporting private and group conversations with rich messaging features.
Architecture
React Native CLI app with TypeScript, React Navigation 7, Firebase-backed real-time communication, and reusable chat modules.
Challenges solved
Designed real-time chat interactions, message timers, rich content rendering, location sharing, and searchable user/channel experiences.
mobile/smart-shop-e-commerce-app
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React Native project from resume
A React Native e-commerce application with authentication, profile management, shopping, payments, and order updates.
Architecture
Expo app with TypeScript, Redux for global state, and React Query for server-state caching.
Challenges solved
Built secure authentication, real-time updates, profile image/address management, checkout flows, and notification-driven order tracking.
mobile/fittrack-fitness-app
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React Native project from resume
A fitness and health tracker with workouts, progress history, step counting, calories, diet planning, and reminders.
Architecture
Expo app using Redux for workouts, goals, and profile state, plus React Query for server-state caching.
Challenges solved
Coordinated sensor-backed fitness tracking, motivational notifications, streak alerts, and reliable workout data sync.
mobile/taskflow-project-management-app
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React Native project from resume
A task and project management app for personal and team workflows with scheduling, priorities, and sync.
Architecture
Expo app with Redux persistence and React Query refetch strategies for offline-first caching and background sync.
Challenges solved
Implemented offline-first task caching, background sync, status management, reminders, and real-time device synchronization.
mobile/android-production-apps
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2015 - 2025 company project work
A collection of enterprise-grade Android apps across healthcare, payments, retail, media, and mobility.
Architecture
Scalable multi-module architecture with shared foundations and isolated feature delivery.
Challenges solved
Handled large-team coordination, migration strategy, regression risk, and long-lived product evolution.
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