Kartikey Mahawar

Hi, I'm Kartikey Mahawar

Lead Flutter Fullstack Developer

3+ years building high-performance cross-platform applications serving 10K+ daily users. Specialist in concurrent Flutter architectures, real-time pipelines (gRPC, WebSockets), and event-driven microservices at Cladbe.

About Me

I'm a passionate fullstack Flutter developer with expertise in creating cross-platform applications and robust backend systems.

My Journey

Lead Flutter Fullstack Developer with 3+ years of experience building high-performance cross-platform applications serving 10K+ daily users. Specialized in architecting concurrent Flutter frontends, real-time pipelines (gRPC, WebSockets), and distributed backend systems.

Architected concurrent file upload system achieving 37% faster performance and 50% memory reduction using Dart isolates. Expert in offline-first BLoC/Riverpod state management, event-driven microservices, and Graph-Based Access Control with Neo4j.

Currently working as Lead Flutter Fullstack Developer at Cladbe, where I lead engineering teams building multi-tenant SaaS platforms across Web, iOS, Android, macOS, and Windows. Open-source contributor with published packages on pub.dev including Fletch (Express for Dart) and Knex Dart (SQL query builder).

Mobile Development

Expert in Flutter for iOS and Android app development

Web Development

Flutter Web and modern web technologies

Backend Development

API design, databases, and server-side architecture

Full Stack

End-to-end application development and deployment

Professional Experience

My journey as a developer across different roles and organizations.

Lead Flutter Fullstack Developer

Cladbe

June 2024 - Present
Bareilly, India
  • Built cross-platform Flutter apps (web, mobile, desktop) for multi-tenant real-estate SaaS serving 10K+ daily users
  • Architected concurrent file upload system using Dart isolates achieving 37% faster uploads, 50% memory reduction, and CPU usage from 200% to 50%
  • Integrated event-driven backend (gRPC, WebSocket streams, Kafka CDC pipelines) with offline-first BLoC/Riverpod state management
  • Implemented Graph-Based Access Control UI with Neo4j for robust permission management
  • Led team of engineers and established Flutter best practices for scaling
Flutter
Dart Isolates
gRPC
WebSocket
Kafka
Neo4j
BLoC
Riverpod
S3
Flutter Software Developer

Amiltus / Cladbe

December 2023 - June 2024
Bareilly, India
  • First engineer—architected cross-platform real-estate platform from ground up for Web, iOS, Android, macOS, and Windows
  • Designed responsive UIs with BLoC/Riverpod state management and implemented performance optimization with offline caching
  • Built real-time sync using gRPC/WebSockets and established CI/CD pipelines for team scaling
  • Implemented Graph-Based Access Control (GBAC) UI with Neo4j integration
Flutter
Firebase
BLoC
gRPC
WebSockets
Neo4j
Typesense
Node.js
Docker
Software Developer Intern

Wells Fargo

June 2023 - August 2023
Hyderabad, India
  • Developed React UI for ML-driven enterprise workflows with user-friendly design
  • Integrated machine learning predictions and real-time data using Socket.io and MongoDB
  • Ensured responsive user interfaces and seamless AIML integration
React
Socket.io
MongoDB
Machine Learning
React Native Developer

Andwemet

February 2021 - April 2022
Remote
  • Developed core mobile features across React Native, Node.js, and MongoDB stack
  • Built real-time chat + notification system using WebSockets improving delivery speed and user engagement
  • Implemented document verification workflows with API integration, validation logic, and secure upload handling
  • Improved app stability by fixing major crashes and optimizing performance, significantly boosting retention
React Native
Node.js
MongoDB
WebSockets

Skills & Technologies

Here are the technologies and tools I work with to bring ideas to life.

Programming Languages
Dart
TypeScript
JavaScript
Kotlin
Java
C++
Python
C
Flutter & Dart
Flutter
BLoC
Riverpod
Provider
Dart Isolates
Offline-first
Fastlane
Backend & Real-time
gRPC
WebSockets
REST
Kafka CDC
Node.js
TypeScript
Event-driven
S3
Databases & Infrastructure
PostgreSQL
MongoDB
Neo4j
Redis
KeyDB
Typesense
Docker
CI/CD
Nginx
Web Frameworks
React Native
React.js
HTML
CSS
Next.js
Cloud & DevOps
AWS
Google Cloud
GitHub Actions
Firebase
Cloudflare R2
k6
Git

Featured Projects

Here are some of my recent projects that showcase my skills and experience.

Fletch - Express for Dart
Fletch - Express for Dart
Production HTTP framework with radix tree router, middleware pipeline, SSE support, CORS, rate-limiting, and hot reload. Published on pub.dev with full documentation.
Dart
HTTP
GetIt
Middleware
Hot Reload
Knex Dart - SQL Query Builder
Knex Dart - SQL Query Builder
Port of Knex.js with 100% API parity. Type-safe SQL query builder with 268 passing tests covering SELECT, INSERT, UPDATE, DELETE, and aggregate functions.
Dart
SQL
PostgreSQL
Query Builder
Mongo Chat Dart
Mongo Chat Dart
Real-time chat SDK for Dart with user management, direct messaging, group chats, read receipts, and WebSocket streams for high-performance communication.
Dart
MongoDB
WebSockets
Real-time
Concurrent File Upload Orchestrator
Concurrent File Upload Orchestrator
High-performance upload system using Dart isolates achieving 37% faster uploads, 50% memory reduction, and CPU usage from 200% to 50% with lazy chunk loading and Merkle tree deduplication.
Dart
Dart Isolates
S3
Merkle Trees
Performance
Country Data Kit
Country Data Kit
High-performance Flutter package for country, state, and city data using protobuf for efficient serialization and querying. Optimized for fast lookups and minimal memory footprint.
Dart
Flutter
Protobuf
Data Management
DotPay - Neo-Bank Platform
DotPay - Neo-Bank Platform
Token-based neo-bank enabling users to label transactions, invest in community projects, and earn ERC20 token incentives for participation.
Flutter
API Integration
Blockchain
ERC20

Awards & Achievements

Recognition for innovation and excellence in various competitions and hackathons.

GrabHack 2025

2nd Prize Winner - Backend Track

July 2025

Nasscom Academic Grand Challenge (Wells Fargo Hackathon)

1st Prize Winner

February 2023

Smart India Hackathon 2022

1st Prize Winner

August 2022

Bajaj Finserv Hackrx 3.0

Third Prize Winner

June 2022

Defence Innovation Hackathon

1st Prize Winner

May 2022

Hack The Mountains 2.0

3rd Prize Winner

June 2021

Positions of Responsibility

App Developer Head | Coding Ninjas Club SRM
2021 - 2023
Mentored and guided 30+ students and completed 4 full-fledged working apps
App Developer Lead | Gen-y Club SRM
2021 - 2023
Mentored and developed 5 cross-platform apps including the club app

What Clients Say

Don't just take my word for it. Here's what clients and collaborators have to say about working with me.

Working with this Flutter developer was an absolute pleasure. They delivered our mobile app ahead of schedule and exceeded our expectations in terms of quality and performance.

Sarah Johnson

Sarah Johnson

Product ManagerTechCorp Inc.

We hired this developer to rebuild our existing app using Flutter, and the results were impressive. Not only did they successfully port all features, but they also improved the UI/UX.

Michael Chen

Michael Chen

CTOStartupX

Our healthcare app required complex integrations and a flawless user experience. This Flutter developer delivered on all fronts. They were communicative, detail-oriented, and truly understood our vision.

Emily Rodriguez

Emily Rodriguez

FounderHealthApp

As a fellow developer, I can attest to the exceptional quality of code and architecture this Flutter developer produces. Their contributions were invaluable to our large-scale project.

David Kim

David Kim

Lead DeveloperDevTeam Global

I've worked with many developers who struggle to implement designs accurately, but this Flutter developer was different. They perfectly translated our design files into a beautiful, functional app.

Olivia Martinez

Olivia Martinez

UI/UX DesignerDesignStudio

The Flutter app they built for us has been a game-changer for our business. The performance is outstanding and our users love the intuitive interface. Highly recommended!

James Wilson

James Wilson

Startup FounderInnovateNow

50+
Projects Completed
30+
Happy Clients
5★
Average Rating
3+
Years Experience

Latest Blog Posts

Sharing insights, tutorials, and best practices in Flutter development and software engineering.

Flutter State Management in 2024: A Comprehensive Guide
Featured
Jan 15, 2024
Explore the latest state management solutions in Flutter, from Provider to Riverpod, and learn when to use each approach.
Flutter
Flutter
State Management
Read More
Building Scalable Flutter Applications: Architecture Patterns
Featured
Jan 10, 2024
Learn how to structure your Flutter apps for scalability using clean architecture, MVVM, and other proven patterns.
Architecture
Flutter
Architecture
Read More
Optimizing Flutter Web Performance: Tips and Tricks
Featured
Jan 5, 2024
Discover techniques to improve your Flutter web app's performance, from code splitting to lazy loading.
Performance
Flutter Web
Performance
Read More

Get In Touch

I'm always interested in new opportunities and exciting projects. Let's discuss how we can work together!

Contact Information

Feel free to reach out through any of these channels. I typically respond within 24 hours and I'm always happy to discuss new projects or opportunities.

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