Himanshu — Mobile Developer & AI/ML Engineer

01 — About

Engineer by trade,
designer at heart.

Singapore · UTC+8

himanshu

mobile_developer.exe

EXP

6y+

Hi there. I build the apps you don't want to put down.

I'm a mobile developer with six years of experience shipping production apps used by millions. I started as a designer who couldn't stop opening Xcode, and that hybrid background still shapes everything I ship — code that's not just functional, but feels intentional down to the last spring animation.

These days I split my time between native iOS work in Swift/SwiftUI, cross-platform builds in React Native and Flutter, and the occasional deep-dive into performance optimization. I care a lot about accessibility, smooth 60fps interactions, and writing code that the next developer (usually future me) will thank me for.

Location

Singapore

Experience

6+ years

Projects shipped

30+ apps

Availability

Open · Q2 2025

Swift Kotlin SwiftUI React Native Flutter GraphQL Firebase Figma CI/CD App Store

02 — Capabilities

A toolkit built for
shipping real products.

From low-level performance tuning to high-fidelity UI work — these are the tools I reach for daily, and the rough percentage of my recent projects that touch each.

iOS Development

native · 6 years

Swift95%

SwiftUI92%

UIKit88%

Combine / async-await85%

Android Development

native · 4 years

Kotlin90%

Jetpack Compose87%

Coroutines / Flow83%

Room / Hilt80%

Cross-Platform

react native · flutter

React Native88%

Flutter / Dart82%

TypeScript90%

Expo / EAS78%

Design & Tooling

design-minded dev

Figma92%

Motion / Lottie85%

CI/CD (Fastlane)80%

Git / GitHub Actions88%

03 — Selected work

Apps I've shipped
recently.

A few projects from the last 18 months — from health & fitness to fintech to social. Each one shipped to production with real users.

Health & Fitness · iOS / Android

PulseFit

A fitness companion app with adaptive workout plans, real-time heart rate zones, and an Apple-Watch-grade activity ring system. 250k+ active users.

SwiftUIHealthKitWatchKitFirebase

9:41

Today

Move more

P

Burned

642 /kcal

8,902

steps

72 bpm

heart rate

Music · iOS

Sonance

A minimalist music player focused on lossless audio and spatial experiences. Featured by Apple in "New Apps We Love" — January 2024.

SwiftUIAVFoundationCoreAudioStoreKit 2

9:41

NOW PLAYING

Midnight Drive

Neon Skylines

1:42-2:08

Fintech · iOS / Android

Vault

A personal finance app with multi-currency wallets, instant transfers, and spend analytics. SOC 2 compliant. Cross-platform with React Native.

React NativeTypeScriptGraphQLReanimated 3

9:41

Total balance

$24,801.55

+ $342.10 this week

VAULT CARD

**** 4928

Spotify -$9.99

Salary +$4,200

Coffee Club -$4.50

Travel · Flutter

Wander

A travel discovery app with AI-curated itineraries, offline maps, and community-driven recommendations. Featured on Google Play, March 2024.

FlutterDartSupabaseMapbox

9:41

Where to next?

Kyoto, Japan

12 destinations · 5-day trip

Trending Beaches Cities

Top picks

Lisbon

Portugal · 7 days

$890

Bali

Indonesia · 10 days

$1,240

0

Apps shipped

0

Total downloads

0

Crash-free sessions

0

Avg store rating

04 — Journey

Six years of
building & shipping.

2023 — Present

Senior Mobile Engineer

Lumen Labs · Singapore

Leading mobile development for a health-tech platform serving 2M+ users. Architected the migration from UIKit to SwiftUI, cutting build times by 40% and improving developer velocity significantly. Mentor a team of four engineers.

SwiftUI HealthKit Team Lead

2021 — 2023

Mobile Engineer

Driftwave Studios · Remote

Built and shipped 6 cross-platform apps in React Native and Flutter for clients ranging from early-stage startups to public companies. Owned the full mobile lifecycle — from architecture to App Store submission.

React Native Flutter Client Work

2019 — 2021

iOS Developer

Nimbus Apps · Tokyo

Shipped 4 category-leading iOS apps in the productivity space. Built the company's design system from scratch and established the CI/CD pipeline with Fastlane that's still in use today.

Swift UIKit Design Systems

2018 — 2019

Junior iOS Developer

Pixel Forge · Singapore

My first professional role. Cut my teeth on Objective-C legacy codebases, shipped my first feature to production in week three, and never looked back. Learned the value of clean code the hard way.

Objective-C Swift Junior

05 — Kind words

What people I've worked
with have to say.

Kai is the rare engineer who cares as much about the pixel-perfect UI as the architecture underneath. He shipped our iOS app in 8 weeks — code that's still a joy to maintain two years later.

SM

Sarah Mendez

CTO · Lumen Labs

We hired Kai to rescue a stalled React Native project. He had it in production in six weeks, with a 60% reduction in cold-start time. Genuinely one of the best mobile engineers I've worked with.

JL

James Liu

Founder · Vault Finance

What sets Kai apart is the design sensibility. He doesn't just implement Figma files — he improves them. The motion details he added to our app won us an Apple featuring in week one.

AK

Aiko Tanaka

Lead Designer · Driftwave

06 — Contact

Have an app idea?
Let's build it.

Currently booking projects for Q2 2025.

I take on a limited number of projects each quarter so I can give each one the attention it deserves. Whether you're a startup shipping your first MVP or an established team needing mobile expertise, I'd love to hear about it.