Delhi, India · Available worldwide, remote-first

Best Android Developer — Native Kotlin, Jetpack Compose, and High-Performance Android Engineering

Sachin Sharma is a top Android Developer based in Delhi, India, specializing in native-quality Android application architectures (Kotlin, Jetpack Compose, Flutter, ExoPlayer, Room DB). With over 1.5+ years of production experience and production-grade installations, he builds low-latency, battery-efficient, and responsive Android apps optimized for diverse device form factors and OS versions.

I know you want to build something great with Android Development.

There are 10 lakh+ agencies, 5 crore+ "vibe coders," and 1 crore+ developers out there — and somehow you ended up on this page. That's not an accident, that's a genuine signal. I'm 21, and if you're on my website right now, you're already looking at someone better than most of what's out there. I'd genuinely prefer to talk to you directly rather than have you read through another page. Please feel free to call, message, or email — whichever works best for you.

Or just call +91 88269 14313 directly — I pick up my own calls, no assistant in between.

Or just see what I've built first

At a Glance

Target Device Profiles

Phone, Tablet, WearOS, Android TV

Primary Languages

Kotlin (Coroutines, Flow), Java, C++ (NDK)

UI Toolkits

Jetpack Compose (Declarative), XML View Systems

Graphics & Audio

Vulkan API, OpenGL ES, ExoPlayer, AAudio

Local Databases

Room SQL (SQLite abstraction), Realm

Deployment Range

Android API 21+ (99.8% device coverage)

Build Systems

Gradle (Kotlin DSL), Maven

Automation & Testing

Fastlane, Play Console pipelines, JUnit

On This Page

~7 min read

1. Kotlin Coroutines & Flow UI Architecture

2. Room Database & Relational Persistence

3. Low-Latency Audio and Graphics: ExoPlayer & Vulkan NDK

4. Android Services & WorkManager Syncing

5. Google Play Console Rollouts and Fastlane Automation

6. Case Study: Shipped Android Performance in Loopin & Legease

Sachin Sharma vs. Alternatives

How working with me directly compares to agencies and general freelancers.

Metric	Sachin Sharma	Agencies	Freelancers
Who you talk to	Me, directly. The person writing your code answers your messages.	Account managers and PMs relay your feedback to developers you never meet.	Variable — depends who you find, timezone gaps are common.
What you get	Production apps built end-to-end, not prototypes or tutorial-grade demos.	Junior developers rotated onto your project; senior oversight is inconsistent.	Often strong at scripts and one-off scripts, less so at shipping to production.
Performance work	Real optimization: shader precompilation for 60fps Flutter, Edge SSR under 50ms TTFB, bundle budgets enforced.	Standard boilerplate setup, rarely tuned past 'it works'.	Performance tuning usually skipped unless explicitly (and separately) paid for.
Code ownership	Fully typed, documented codebase. Full git history handed over on day one.	IP clauses and handover friction are common.	Documentation and typing discipline vary a lot person to person.

Frequently Asked Questions

Why should we build a native Android app in Kotlin rather than cross-platform?

Native development provides complete access to the latest Android APIs, offers maximum performance, and ensures the UI matches Material Design patterns.

How do you handle memory leaks in Android (such as Activity context leaks)?

I avoid storing references to Activity contexts in static classes, use weak references where needed, and profile heap allocations using LeakCanary.

What is Jetpack Compose and do you recommend it?

Jetpack Compose is Android's modern declarative UI toolkit. It reduces code complexity, speeds up development, and is lighter than XML views.

How do you handle Android permission requests securely?

I implement runtime permission requests, handle user rejection paths cleanly, and write explanation prompts to guide users.

Do you automate Play Store release pipelines?

Yes. I set up automated internal testing channels and managed staged rollouts, allowing teams to verify builds before public release.

How do you prevent UI layout freezes when loading large lists in Jetpack Compose?

I use `LazyColumn` or `LazyRow` with stable item keys. This makes Compose reuse row components dynamically, avoiding layout lag when scrolling.

How do you handle database migrations safely in Room?

I write explicit migration scripts using Room's `Migration` class and verify updates with automated database test cases.

What is the NDK and when should it be configured?

The Android Native Development Kit (NDK) allows compiling C/C++ code. I use the NDK for high-performance operations like graphic rendering and raw audio processing.

How do you manage configurations across debug and release builds?

I define build variants and configure custom schemas in Gradle, letting us set API endpoints and debug properties easily.

How do you handle background tasks when the device enters sleep mode?

I use WorkManager for database syncing, and configure foreground services with wake locks for continuous operations like audio playback.

How do you secure API tokens and keys on Android?

I encrypt local credentials and bind them to the hardware Android Keystore System. For source files, I inject keys using Gradle build properties.

What is your approach to supporting diverse screen form factors?

I design layouts using relative dimensions and adaptive Compose constraints, ensuring the UI renders properly on phones, tablets, and foldables.

How do you profile app energy and CPU usage in Android Studio?

I run performance audits using Android Studio Profilers, tracking CPU cycles, heap usage, network payloads, and battery drain.

Do you support WearOS or Wearable device integrations?

Yes. I build custom notifications and configure WearOS modules that sync data with the primary phone app.

What is Jetpack Hilt and do you recommend it?

Hilt is a dependency injection library built on top of Dagger. I use Hilt to initialize database engines and repositories, keeping the architecture clean.