Expanding South Asia’s Amazon with
a Mobile-First E-commerce &
Bookstore Experience

Expanding South Asia’s Amazon with a Mobile-First E-commerce & Bookstore Experience

About the Project

Industry

E-commerce (Books & Retail)

Timeline

2016–2017

Services

Mobile App Development, UX Optimization, Android Engineering

This client project is Bangladesh’s leading online bookstore and e-commerce platform, serving millions of readers and shoppers across the country. As mobile usage started growing rapidly in 2016, the company aimed to expand beyond the web and reach users through mobile applications, ensuring a smoother and more accessible buying experience.

Performance Highlights

5x

User Growth Post-Launch

2x

Increase in Customer Engagement

4.4

Play-Store Rating

Unified

Web and mobile experience across platforms

Native

Android app built from the ground up

Beta

A/B testing program launched pre-release

The Challenges

Limited reach with web-only platform
No dedicated mobile app experience
Need for a centralized, frictionless login system
Complex and evolving API infrastructure
Performance limitations of low-end Android devices
Maintaining consistent UX across web and mobile
Difficulty converting casual users into loyal customers

Solutions & Impact

Developed a complete Android application for mobile users to capture mobile-first users during the smartphone boom
Designed unified experience across web and mobile
Adopted MVVM architecture pattern to mirror web UX while respecting Android's design system
Optimized app performance and resource usage to support low-end Android devices
Designed a centralized, frictionless authentication system for mobile users
Built a fully modular codebase to absorb frequent API and infrastructure changes from client's core team
Collaborated closely with client's engineering team on component design, balancing brand consistency with platform standards

TechCare's Journey with The Project

Journey

2016 - Ideation, Planning & Architecture

That client approached TechCare with a clear goal: expand beyond the web and reach the growing base of smartphone users across Bangladesh. The smartphone boom was creating a new class of mobile-first shoppers, and they needed a reliable tech partner to bring their buying experience to Android. TechCare focused on building a complete mobile buying experience before adding advanced features. Key architectural decisions were made early:

MVVM pattern selected for modularity and maintainability
Agile, milestone-based development process established
User journey mapped as the foundation for data flow design
Performance benchmarking set as a core KPI given Android device fragmentation
Journey

2016–2017 - Development & MVP

With feature priorities set around the most impactful user actions first, TechCare built and iterated:

Complete end-to-end purchase flow on mobile
Centralized login and authentication system
Integration with the project's evolving API platform
Crashlytics (Fabric) integrated for real-time app health monitoring
Journey

2017 - Beta Testing & Launch

Before full release, TechCare ran A/B testing across a selected group of beta users. The existing feature roadmap made it straightforward to track completed, pending, and rework items. Key KPIs monitored through launch included:

API response logging
Latency benchmarking
Android build performance and stability
Security benchmarking and code obfuscation
Journey

2017 - Post-Launch Optimization

This approach proved valuable after launch. As client's product team requested feature updates and changes, TechCare was able to deliver them quickly without affecting the overall system. This continued to add value beyond the initial project.

Results & Impact

5x user growth

Significant user base expansion following the mobile app launch.

2x customer engagement

Doubled interaction rates across key touchpoints and user journeys.

Mobile-first reach

Expanded access to mobile-first users and new market segments.

Tech Stack, How We Built It

Frontend

Android (Java/Kotlin)

Tools

Android Studio

Libraries

Retrofit, Glide, Volley, Dagger 2

Notifications

OneSignal, Firebase GCM

Analytics

Custom Analytics Framework, Fabric (Crashlytics)

Systems Delivered

User-Facing Mobile App

Full book browsing and purchase experience

Login System

Centralized and frictionless authentication

Notification System

Order updates and engagement notifications

Modular Architecture

Flexible system for continuous feature updates

Mahmudul Hasan Sohag

The collaboration with TechCare on our official Rokomari.com app set a standard for what great partnerships should look like. Building a product of this scale, over 300 screens, now serving 1.6M users, demands far more than technical execution. It demands genuine understanding, cultural alignment, and a team willing to treat your product as their own. TechCare delivered on every front. From the earliest conversations to the final release, they worked as an inseparable part of our team. The result is a product we are proud to put Rokomari's name on.

Mahmudul Hasan Sohag

CEO & Co-Founder, Rokomari.com

Data-Driven Development

TechCare followed a structured and data-driven approach:

API response logging
Latency benchmarking
Integration with Rokomari's evolving API platform
Security benchmarking and code obfuscation

User journey data guided feature prioritization, ensuring that the most important actions were optimized first.

Challenges We Solved Differently

Unlike typical implementations, TechCare focused on:

Building for low-end device performance
Maintaining cross-platform UX consistency
Handling constantly changing APIs
Creating a future-ready modular system

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