Building Android
that runs at
scale

Senior Android Engineer with 10+ years building platform architecture, media systems, and performance-critical subsystems — video/audio pipelines, CI/CD, startup performance — for apps used by millions. Lately I've been stretching into web and iOS through AI-assisted development with Claude Code and Cursor. I've never thought of myself as a finished book; curiosity keeps pulling me toward new things, and I love working with great people and going the extra mile to get things done right.

Kuala Lumpur, MalaysiaGitHubLinkedInEmail
Suraj Sambath Kumar
Suraj.kt● live
01About

A platform engineer who ships.

I've spent the last decade going deep on Android — from a junior dev in Kerala shipping client work, to owning core platform systems at Mindvalley serving millions of users.

My focus is the infrastructure layer: media playback, performance, CI/CD, app architecture. The kind of work that doesn't ship as a feature, but every feature depends on.

I care about measurable outcomes — crash rates, cold-start times, build durations — and I work across Kotlin Multiplatform, React Native, and Next.js / Node.js when the product needs it.

Lately I've been leaning hard into AI-assisted engineering — building team workflows with Claude Code and Cursor, writing custom agents, and standardizing how my team ships Android with AI in the loop.

10+
Years building Android
97 → 99.6%
Crash-free sessions lift
−30%
Cold-start reduction
−15%
CI build-time cut
02Experience

Where I’ve worked.

  1. Mindvalley
    Senior Android Engineer2023 — Present
    Android Engineer2020 — 2023
    • Own core Android platform components — media playback, performance infrastructure, build optimization — across multiple high-traffic apps.
    • Re-architected video/audio playback with ExoPlayer + Media3: reusable media libraries, downloads, advanced playback controls. Significant stability gains on low-end devices.
    • Lifted crash-free sessions from 97% → 99.6% by stabilizing high-risk modules, raising unit test coverage, and hardening error handling.
    • Cut app cold-start by 30% using Baseline Profiles and startup optimization.
    • Integrated Jetpack Compose into production features through reusable composables.
    • Tuned CI/CD on Bitrise + GitHub Actions, reducing build times 15% via caching and automated quality gates.
    • Built a Kotlin Multiplatform PoC for shared user-account logic across Android and iOS.
    • Introduced AI-assisted engineering workflows with Claude, standardizing Android best practices across the team.
  2. Rapid Value Solutions (Aspire Systems)
    Software Developer2019 — 2020
    • Improved performance and feature stability on the Falabella e-commerce app (5M+ downloads).
    • Re-engineered login and registration on MVVM — 15% perf improvement, fewer ANRs.
    • Migrated DI from Dagger to Koin, lifting developer productivity by ~50%.
  3. Entri
    Product Engineer (Android)2019
    • Shipped Android features for exam-prep and community learning (5M+ downloads).
    • Built scalable features on MVVM with a modular design.
    • Improved stability via unit testing and tight product/design collaboration.
  4. 2Base Technologies
    Software Developer2017 — 2019
    • Developed and maintained Android apps across agile teams.
    • Focused on scalable, maintainable code practices.
03Skills

The stack I reach for.

Languages
KotlinJavaJavaScriptTypeScriptXML
Android
Jetpack ComposeExoPlayer / Media3CoroutinesRoomDataStoreMulti-moduleBaseline Profiles
Architecture
Clean ArchitectureMVVMSOLIDKMMDesign Patterns
Web & Cross-platform
Next.jsReactNode.jsReact NativeKotlin MultiplatformTailwind
AI-assisted Dev
Claude / Claude CodeCursorAgent SDKMCP serversPrompt engineering
CI/CD & Tooling
BitriseGitHub ActionsGradleKtlintDanger
Testing
JUnit5MockkEspressoAppiumWebDriverIO
Networking & DI
RetrofitApollo GraphQLDagger-HiltKoin
Platforms
FirebaseRevenueCatAmplitudeSauceLab
04Projects

Apps I’ve shipped.

05Contact

Let’s talk.

I'm always open to chat about Android platform work, performance engineering, or interesting senior / staff opportunities. The fastest way to reach me is email.