Java Android App Development & Migration
Robust Java Android development and seamless Java-to-Kotlin migrations — modernising your legacy Android investment without disrupting your existing user base.
- Legacy Java Android Development
- Java-to-Kotlin Migration
- Architecture Modernisation
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Everything Included in Java Android App Development
01
Legacy Java Android Development
Full-featured Android development in Java for teams with existing Java expertise — MVC/MVP/MVVM architecture patterns.
02
Java-to-Kotlin Migration
Incremental migration strategy converting Java classes to Kotlin while maintaining 100% functional parity and test coverage.
03
Architecture Modernisation
Upgrade legacy Java apps from MVC to modern MVVM with ViewModel, LiveData, and Repository pattern.
04
Dependency Injection
Dagger 2 or Hilt for clean dependency injection — replacing manual factory patterns in legacy codebases.
05
API Integration
Retrofit + OkHttp REST client integration with full interceptor chain for auth, logging, and retry logic.
06
Automated Testing
JUnit 4/5, Mockito, and Espresso UI test suites for comprehensive coverage across Java Android modules.
From Idea to
Scalable Growth
Turning an idea into a successful product takes more than just development. As your product evolves, complexity increases. Naestinn partners with you at every stage—validating ideas, building reliable products, and scaling them for long-term growth.
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Case Studies That Speak for Themselves
Naest Tutors
Naest Tutors is a smart education platform designed to connect qualified tutors with school and college students for home and online tuition. The platform simplifies tutor discovery, booking, and management through a seamless digital experience.
Operations Head, Naest Tutors
Challenges
Building a reliable platform to match students with verified tutors while managing scheduling, locations, and academic preferences efficiently.
Solutions
Developed a centralized platform with tutor verification, smart matching, and streamlined onboarding for students and tutors.
Key Features
Tutor onboarding, student requests, smart tutor matching, location-based search, online and home tuition support.
Business Impact
Improved tutor discovery, reduced manual coordination, and enabled faster enrollment for students and educators.
Excellence.Is Our Minimum Standard.
Over 130 awards, recognitions, and industry accolades reflect our commitment to building high-impact digital solutions and long-term client success.
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India's Fastest-Growing Companies 2025
Top 100 U.S. IT Innovators 2025
America's Top Software Developers 2025
Top 100 Global Outsourcing Providers 2024
America's Fastest-Growing Companies 2024
Company of the Year – Artificial Intelligence 2024
Trusted by Founders
and Engineering Leaders
Businesses that chose Naestinn for mobile development — and measured the results.
“Naestinn delivered our fintech iOS app in 9 weeks — it handles 50,000 daily active users with sub-100ms response times. The Figma-to-Swift handoff was seamless and the team's ProMotion optimisation gave us truly 120fps scrolling.”
“Our Flutter app launched simultaneously on App Store and Play Store with a 4.9-star rating on both. Naestinn's cross-platform expertise saved us 40% in development cost versus maintaining two separate native teams.”
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Book Free Call“The React Native app replaced our legacy hybrid app completely. Crash rate dropped from 3.2% to 0.04%, session length increased 2.8×, and our App Store rating went from 3.1 to 4.8 within 3 months of launch.”
“Naestinn's ASO work alone drove a 63% increase in organic downloads without a dollar of extra paid spend. Their keyword research uncovered a 400K/month search term we were completely missing before.”
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