Available for Lead Roles

DevarshPanchal

Lead Flutter Developer & Full-Stack Engineer

Building production-grade mobile apps & scalable backends with AI-powered workflows

View ProjectsVibe CodingResume
About Me

Lead Flutter Developer with 4+ years building production mobile apps

Led UK-based eWealth FinTech platform — a full-featured wealth management app.

Deep expertise in Flutter, Dart, Firebase, Socket.IO with native integrations for VOIP, VPN, and real-time chat.

Leveraging AI-powered tools (Cursor, Claude) to ship 3x faster without sacrificing quality.

What I'm Looking For
Lead RolesProduct-drivenRemote/HybridFull ownership

What I Bring

Full-Stack

Flutter + Node.js/EXpress.js backends with real-time features

Native Deep-Dive

Platform channels, custom plugins, iOS/Android access

Architecture

Scalable, maintainable codebases designed for growth

Rapid Delivery

AI-accelerated development, production-grade quality

Production Domains

Shipped across four industries.

Systems deployed in live markets, from UK wealth management to real-time ad mediation.

FinTech

UK wealth management

Logistics

Supply chain

VOIP/VPN

Communication

Ad-Tech (SDKs)

Real-time bidding & analytics

AI-POWERED ONE-MAN AGENCY

Vibe Coding

Ship full-stack ecosystems at speeds traditional teams can't match. I leverage Cursor, Claude AI, and Vibe Coding to architect and ship complex systems rapidly.

Powered By:
Cursor IDEClaude AIGitHub CopilotCodeX

AI handles syntax & boilerplate. I architect and ship business logic at scale.

How It Works:

  • Rapid Iteration: AI handles boilerplate. I own architecture and logic.
  • Production-Grade Quality: Ship scalable, maintainable systems without compromise.
  • Compressed Timelines: 60-90 day projects ship with weeks of iteration.

Proof of Work:

  1. 1.60-Day Booking System (React Native, RBAC, Backend)

    Shipped complete booking management with role-based access control and sophisticated backend logic on aggressive deadline.

  2. 2.300 RPS Backend (Node.js, Redis, RabbitMQ)

    High-performance inventory management backend sustaining 300+ requests/second with active optimization and dedicated support.

What I Deliver:

  • Full-stack Flutter & React Native apps
  • Scalable Node.js backends (REST, GraphQL, Socket.IO)
  • System architecture & technical strategy
  • Production deployment & DevOps setup

Flagship Work

Engineering Case Studies

Flagship projects delivered end-to-end, from architecture to production.

Case Study 01Featured

Ad-Tech Custom Mediation SDK

A plug-and-play custom adapter SDK for native Android, iOS, Flutter, and React Native. It intercepts mediation requests (such as AdMob, AppLovin, and LevelPlay) from inside the SDK's code to dynamically display high-paying ads without requiring any extra business logic from the developer.

AndroidiOSFlutterReact NativeAdMobAppLovinLevelPlay
tap_mind_ads_admobtapmind_ads_applovintapmind_ads_ironsource

🛠️ What I Built

  • Zero initialization code required by developers
  • Wrapper support for cross-platform frameworks like Flutter and React Native
  • Dynamic ad request manipulation within closed ecosystems
  • Full lifecycle event capture (adLoad, ad fail, impressions) seamlessly

⚠️ Engineering Challenges

  • Manipulating AdMob and other mediation ad requests without requiring any extra code from the developer's side
  • Getting and handling all native events from the adapter, such as adLoad, ad fail, and impressions, accurately

✅ Solutions

  • Built a low-level native adapter layer that hooks into the mediation flow natively
  • Provided unified official methods via SDK wrappers without requiring project-wide code changes, making it highly developer-friendly

🚀 Impact

  • 40% increase in developer adoption across partner apps
  • 35% higher eCPM (Effective Cost Per Mille) for publishers
  • Maintained a 99.9% crash-free session rate across all integrated platforms
Case Study 02

Addify – Dynamic Ad Platform

A one-stop solution for online and offline marketing with effective pricing. It handles dynamic ad mediation (Google Ads, Meta Ads, Amazon Ads) from a single platform. You can choose exactly where your ads are shown, providing total cost tracking for offline and digital campaigns with respect to selected areas and platforms.

FlutterNode.jsGoogle MapsGoogle AdsMeta AdsAmazon Ads

🛠️ What I Built

  • Cost-effective digital & offline marketing targeting specific geographic areas and platforms
  • Total cost calculation per hour or day
  • Flexible campaign management — cancel ads or add extra platforms/areas at any time
  • Online ad referral and connection with local vendors
  • Dynamic ad mediation switching based on the selected location area

⚠️ Engineering Challenges

  • Adding marketing constraints with specific area and platform selections
  • Connecting local vendors to the app so they can register themselves as offline banner ad partners
  • Implementing custom area overlays on Maps, such as a circle overlay with a dynamic radius slider

✅ Solutions

  • Utilized PlatformView integration for high-performance native map rendering and smooth custom overlays
  • Implemented interactive Google Maps for precise area selection for offline ads
  • Made ad services highly modular to allow real-time addition/removal of online platforms and offline zones

🚀 Impact

  • 45% increase in downloads
  • 25% increase in premium users
  • 65% more revenues from the offline ad market
  • 55% more revenues from the online ad market
Case Study 03Featured

e-Wealth – FinTech Investment Platform

A comprehensive FinTech investment platform offering real-time tracking and trading capabilities for bonds, mutual funds, securities, and forex.

FlutterSocket.IOFirebaseWebSocketsCustomPainterNative FCM

🛠️ What I Built

  • Real-time market data updates via WebSockets
  • Complex and interactive financial charting UI
  • Highly secure native FCM integration to achieve 2FA approvals using quick action buttons on notifications

⚠️ Engineering Challenges

  • Frequent UI updates from socket data caused list scroll jerks and UI frame drops during animations
  • The Flutter engine would start automatically in the background when users interacted with the 2FA notification action button on iOS — when the user later opened the app, they landed on the dashboard instead of a fresh app start, breaking the UX and causing the app not to appear in recent apps

✅ Solutions

  • Analyzed frame drops using DevTools and optimized the UX by implementing heavy UI components using CustomPainter
  • Manually controlled and stopped the Flutter engine lifecycle to resolve the iOS notification background execution bug

🚀 Impact

  • 30% increase in daily active trading users
  • Achieved a 98% crash-free rate across complex socket events
  • 40% improvement in chart rendering speeds, leading to higher user retention
Case Study 04

DMS – Delivery Master

A B2B delivery management software designed to streamline logistics for any organization. It uses a single codebase to support dynamic company logins and dynamic role-based logins. Total 4 developers and 2 QA were required for the project.

FlutterSQLiteDart IsolatesGoogle MapsBackground Services

🛠️ What I Built

  • Offline capability — local database syncs automatically with the API when the user gets internet
  • Driver location tracking updating every 15 seconds
  • Clock-in/Clock-out functionality with Break-in/Break-out support
  • Add Expense section with attachments so drivers can add bills for food or vehicle repairs
  • Delivery status updates in real-time
  • Proof of delivery capture — photos and customer signatures
  • Multiple Job Locations on the same device for multi-job drivers

⚠️ Engineering Challenges

  • Continuous real-time tracking of driver location on both Android and iOS without severe battery drain
  • Managing driver job timesheets and expenses for particular shifts
  • Adding robust offline support and handling heavy API calls for online-to-offline database fill-ups
  • Handling frequent database migrations as API responses changed
  • Fixing critical app crashes during location tracking

✅ Solutions

  • Added real-time tracking without relying on expensive third-party API services
  • Used Dart isolates to handle heavy background processing and data syncs, drastically improving performance
  • Simplified timesheet management and expense track records for drivers and organizational oversight
  • Built a migration-safe offline architecture so drivers can complete jobs entirely without the internet

🚀 Impact

  • 58% increase in downloads
  • 72% increase in B2B market at the state level
  • 26% increase in B2B market at the national level
  • 50% more referrals from reviews
Case Study 05

SecondLine – VOIP Communication Platform

A feature-rich VOIP to PSTN calling application offering users virtual numbers, e-SIM capabilities, messaging, and robust video calling powered by QuickBlox.

FlutterTwilioQuickBloxMethod ChannelsEvent ChannelsNative Android/iOS

🛠️ What I Built

  • Full VOIP calling and messaging system
  • In-app purchases for premium numbers and services
  • e-SIM functionality integration
  • Custom native calling interfaces with dynamic actions

⚠️ Engineering Challenges

  • No official Twilio package was available for Flutter, requiring complex manual integration
  • Needed to display custom calling notifications with user-defined dynamic actions
  • When a call arrived, Flutter would show a default splash screen on Android and iOS before initializing the engine, creating an unnatural call experience

✅ Solutions

  • Integrated both Android and iOS native Twilio libraries manually
  • Implemented a separate, native-side calling screen that displays instantly without requiring Flutter engine initialization
  • Bridged the communication seamlessly using Method Channels and Event Channels across both platforms

🚀 Impact

  • 40% reduction in call drop rates
  • Achieved native-level call answer speeds (under 1 second)
  • Scaled the platform architecture to support 10k+ concurrent active calls
Native Deep-Dive

Low-level engineering, from C++ to the app store.

Case Study 06

VPN Super – Low-level Native Engineering

A cross-platform VPN application built with Flutter, integrating a VPN wholesaler SDK and robust OpenVPN3 protocols for secure internet access.

FlutterC++CMakeJNIOpenVPN3

🛠️ What I Built

  • One-tap VPN connection infrastructure
  • Deep native OpenVPN3 integration
  • High-speed server switching and cross-platform mobile support for both Android and iOS

⚠️ Engineering Challenges

  • Following a Google Play Store policy update, apps were required to support a 16KB page size
  • The .so files used for OpenVPN3 were taken from a deprecated open-source project that went under shutdown and did not support this new memory requirement

✅ Solutions

  • Custom-built all the required .so files from scratch using C++ and CMake
  • Successfully engineered the 16KB page size support and integrated the updated binaries back into the Flutter app via JNI

🚀 Impact

  • Prevented the app from being delisted from the Google Play Store by meeting compliance deadlines
  • Improved connection handshake speeds by 20% through optimized C++ binaries
  • Sustained a 4.7-star rating with over 500k active users

Skills · Native Deep-Dive

A full-stack surface, with roots in native.

Flutter and native platform channels on the client. Node, Socket.IO, and Firebase on the server.

📱 Mobile

FlutterFlutter
DartDart
KotlinKotlin
AndroidAndroid
  • Bloc
  • GetX
  • Provider
  • MVVM
  • Platform Channels
  • Event Channels
  • Native View Integration
  • Custom Plugin Creation
  • CICD
  • Twillio
  • QuickBlox
  • On device integration

⚙️ Backend

Node.jsNode.js
FirebaseFirebase
  • Express
  • Next.js
  • Socket.IO
  • REST APIs

Career Journey

Experience

Building scalable solutions across mobile, backend, and video processing infrastructure.

  1. Lead Flutter Developer — Tuvoc Technologies

    Apr 2025 - Present

    Lead developer for eWealth, a FinTech investment app. Focused on Socket.IO integration, complex UX, native code, native view integration, and deep performance optimization.

    FlutterSocket.IONative IntegrationPerformance Optimization

  2. Flutter & iOS Developer — Upsquare Technologies

    Mar 2023 - Mar 2025

    Migrated legacy VOIP, VPN, and SaaS products to Flutter, boosting DAU by 30% and revenue by 28-40%. Achieved 98% crash-free sessions. Delivered a 120+ screen cross-platform chat app in 60 days and led 2 client projects from scratch.

    FlutteriOSWebSocketsVOIP/VPNDart

  3. Jr. Flutter Developer — AD Square Technologies

    Jun 2022 - Mar 2023

    Built a delivery management system (DMS), a TikTok-style social media app, and interactive quiz apps. Collaborated directly with clients to deliver scalable, production-grade features.

    FlutterFirebaseREST APIsDart

  4. Trainee Flutter Developer — Infolabz IT Services

    Jan 2022 - May 2022

    Developed client-facing applications utilizing Flutter and Firebase. Focused on debugging, feature development, and UI optimization.

    FlutterFirebaseUI/UX Debugging
Let's build something

Ready to ship production-grade systems.

dev.devarsh43@gmail.com
© 2026 Devarsh Panchal. All rights reserved.Built with Next.js · R3F · Framer Motion