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Delhi, IN
● Available for senior roles

Mobile engineer · Kotlin Multiplatform

Vishal Gaur.

Senior Android Engineer with 5+ years building apps at scale — from payment flows and edtech platforms to last-mile logistics.

Focused on performance, stability, and developer productivity; experienced with Jetpack Compose, KMP, and LLM-assisted workflows.

rr.vishalgaur@gmail.com/github/linkedin
01

What I work on

3 problem classes
01

Consumer scale

Compose migration, MVVM, payment flows, and recomposition tuning for apps with millions of daily users.

  • · Jetpack Compose
  • · MVVM
  • · Payments
  • · Performance
02

Reliability & stability

Crash diagnostics, background processing, WorkManager optimization, and test coverage — keeping apps stable at millions of daily active users.

  • · Crash-free
  • · WorkManager
  • · Testing
  • · Background Processing
03

Cross-platform

Kotlin Multiplatform shared modules, Compose Multiplatform UI, and clean iOS interop for one codebase, every surface.

  • · KMP
  • · Compose Multiplatform
  • · iOS
  • · Desktop
02

Where I've worked

2021 — present
Aug 2024 — Present
Current

Senior Software Engineer @ Shipsy

Sole owner of Shipsy OnDemand — a last-mile delivery app serving Flipkart Minutes, Myntra Now, Apollo, and KFG across multiple countries, powering 1M+ daily orders.

  • 01Delivered end-to-end features: Product Exchange Flow, Open Box Delivery (QC), Returnable Bags, and Undelivered Unblock; drove core improvements in Background Location Syncing, Order Allocation, and Auto-reject flows.
  • 02Improved app stability from 88% to 98% crash-free rate through targeted diagnostics; provided critical production support for Flipkart Minutes (600K+ daily orders) since go-live.
  • 03Pioneered spec-driven development and LLM-assisted workflows, boosting team productivity by 50%.
  • 04Integrated MCP to automatically surface critical crashes and raise PRs, reducing incident response time significantly.
KotlinJetpack ComposeCoroutinesRoomWorkManagerMCP
Read the full case study →
2022 — 2024

SDE-2 · Android @ Testbook

EdTech platform serving 5M+ learners. Led Compose adoption and shipped revenue-driving features end to end.

  • 01Implemented Jetpack Compose UI eliminating redundant re-compositions for over 5M users.
  • 02Introduced Masterclass and Masterseries on a modern MVVM stack, attracting 50K+ daily uniques.
  • 03Spearheaded WorkManager optimization, reducing crashes 90% (from 50K to 1K).
  • 04Integrated EMI payment flow via eNACH for courses, lifting revenue 25%.
KotlinJetpack ComposeMVVMRetrofiteNACH
Read the full case study →
Jan 2021 — Apr 2022

Software Engineer · Android @ Paytm

Android development on financial flows at one of India’s largest fintech platforms, serving 100M+ users.

  • 01Modernized Mobile Recharge and operator selection with a new UI, increasing engagement for 100M+ users.
  • 02Implemented handling for sudden price changes of mobile operators, ensuring seamless operations for millions of daily transactions.
  • 03Integrated split bill with Utility Bill payments, enabling expense splitting for 1M+ transactions.
  • 04Led writing of unit and UI tests using JUnit, Espresso, and Mockito, achieving 50% code coverage across the team.
KotlinJavaMVVMRoomDBJUnitEspressoMockito
Read the full case study →
03

Selected work

All on GitHub ↗
012022

Prefixer→

Android library wrapping SharedPreferences with a typed, fluent API. Published on Maven.

· Android· Library· Kotlin
022021

Shopping App→

Android e-commerce app with Firebase OTP auth, Room-backed cart, and 80% test coverage. 100 GitHub stars; featured in Google Dev Library.

· Kotlin· Firebase· Room· Espresso
032020

Movie Data App→

TMDB-powered movie discovery client with Coroutines, Retrofit, and an MVVM presentation layer.

· Kotlin· Coroutines· Retrofit
042021

DS & Algo Web→

Interactive visualizer for sorting, search, and graph algorithms. Built for teaching.

· React· Visualizer
04

Get in touch

Hiring for a senior mobile role, building something on Compose Multiplatform, or just want to chat about Kotlin? Drop a line.