Available for Projects

Hi, I'm Mrinal Das
Mobile App Developer

I craft beautiful, performant mobile experiences for iOS and Android. Specialized in Flutter & React Native with 5+ years of shipping apps that users love.

30+ Apps Shipped
20+ Happy Clients
5M+ Downloads
View My Work Get In Touch
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My Work

Projects

From production apps to experimental builds — here's what I've been making.

FoodDash App Screenshot App Store · Play Store

FoodDash

Full-stack food delivery app with real-time order tracking, restaurant discovery, and seamless payments. 200k+ downloads.

Flutter Firebase Maps SDK Razorpay
App Store ↗ Play Store ↗
BeatBox App Screenshot App Store · Play Store

BeatBox

Music store and player with offline playback, curated playlists, high-fidelity streaming, and social listening features.

React Native Node.js ExoPlayer AVFoundation
App Store ↗ Play Store ↗
ConnectX App Screenshot App Store · Play Store

ConnectX

End-to-end encrypted messaging app with channels, voice notes, file sharing, and group chat. Telegram-inspired architecture.

Kotlin Swift WebSockets E2E Encryption
App Store ↗ Play Store ↗
Tools & Technologies

My Tech Stack

The tools I rely on to build great mobile experiences — from prototype to production.

Mobile Development

F
Flutter
RN
React Native
S
Swift
K
Kotlin
D
Dart
OC
Obj-C

Backend & APIs

N
Node.js
🔥
Firebase
SB
Supabase
G
GraphQL
API
REST APIs

Design & Prototyping

◈
Figma
XD
Adobe XD
▲
InVision

DevOps & Tooling

G
Git
X
Xcode
AS
Android Studio
CI
CI/CD
FC
Fastlane
How I Work

Best Practices

Principles I follow on every project to deliver reliable, scalable, and maintainable mobile apps.

01 ⚡

Performance First

Every screen targets 60fps rendering. I profile early, avoid jank, and optimize list rendering with lazy loading and view recycling.

02 📦

Component Architecture

Reusable, single-responsibility widgets/components. Clean separation of UI, business logic, and data layers using proven state management patterns.

03 📡

Offline First

Apps work without internet. Local caching, sync queues, and conflict resolution are designed in from day one — not retrofitted later.

04 ♿

Accessibility by Default

Semantic labels, sufficient contrast ratios, minimum touch targets (44×44pt), and screen reader support — built in, not bolted on.

05 🔒

Security Mindset

Secure token storage, certificate pinning, input validation, and zero sensitive data in logs. OWASP Mobile Top 10 checklist on every release.

06 🧪

Test Coverage

Unit tests for business logic, widget tests for UI components, and integration tests for critical user flows. CI gates on coverage thresholds.

Client Love

What Clients Say

Don't take my word for it — here's what the people I've shipped with have to say.

5.0
★★★★★
Avg. Rating
20+
★★★★★
Projects Done
100%
★★★★★
Would Recommend
★★★★★
Best mobile developer we've ever worked with. Mrinal delivered three weeks ahead of schedule and the UI quality was something else — our users started specifically mentioning the app's feel in App Store reviews. We went from a 3.2 average rating to 4.9 in two months. Would hire again without a second thought.
EC
Emma Clarke
Product Lead · Orbitly
Trusted By

Happy Clients

Companies and startups I've had the pleasure of building with.

Let's Talk

Get In Touch

Have a project in mind? I'd love to hear about it. Usually respond within 24 hours.

What I can help with

  • 📱 New mobile app development
  • 🔧 Existing app improvements & rewrites
  • 🎨 UI/UX consultation & prototyping
  • 🔍 App performance audits
  • 📐 Code review & architecture planning
✅ Thanks! I'll get back to you within 24 hours.