Senior Flutter Developer with 4+ years building high-performance, scalable mobile apps.
Specialized in architecting scalable mobile solutions using proven architectural patterns and modern design principles. Experienced in full-cycle development across iOS, Android, and Web platforms, with a proven track record of delivering production-ready applications that prioritize performance, maintainability, and exceptional user experience.
Tech Stack
Open Source
Packages I publish and maintain.
Flutter Audio Output
An open-source Flutter plugin that controls where a phone plays its audio: speaker, earpiece, headphones or Bluetooth.
2022 - Present · Flutter, Dart, Android, iOS, Platform Channels
Selected Work
A curation of my best engineering projects.
DhanXpert
Financial consultation platform enabling real-time expert chat, session booking, and query management.
Flutter, Firebase
Fixsy
On-demand services marketplace spanning a Flutter customer app, a Node.js API, and a React admin console.
Flutter, Dart, Node.js, Express, MySQL, React, Vite, Cloudinary
Klypto
AI-powered trading bot platform for automated crypto strategies.
Flutter, AI
Pandey Transport
Complete transport management system comprising Driver, Transporter, and Admin apps.
Flutter, Dart, Google Maps
Radiation Games
A gaming news and reviews site with its own dashboard for publishing articles.
Next.js, React, TypeScript, Node.js, MongoDB, TinyMCE, Cloudinary
Real Madrid Keyboard
Official keyboard app for Real Madrid fans with integrated merchandise store and custom keyboard.
Flutter, Native Modules, Native Integration, Custom Keyboard
DigiCloset
AI-driven digital wardrobe twin that creates outfit combinations based on body type.
Flutter, AI
Grey Matters
Australian healthcare application built with SwiftUI and GraphQL for efficient data management.
SwiftUI, GraphQL
Echobody
AI-powered fitness app with personalized workout plans and meal recommendations connected to Apple Health.
Flutter, AI, HealthKit
ICICI Games
Interactive games developed using Flutter Flame engine for ICICI digital standees and kiosks.
Flutter, Flutter Flame, Game Development
VISTA
Workplace wellbeing app for employee health, stress management, and productivity improvement.
Flutter
TEDDY
Positive dog training app with tutorials, progress tracking, and personalized training plans.
Flutter, Firebase
Boozlo (Shut-Down)
Alcohol delivery and bar finder app with drink recipes and nearby venue discovery.
Flutter, Google Maps, Firebase
Kind Earth (Shut-Down)
Full-stack e-commerce platform with Next.js frontend and Node.js backend for sustainable products.
Next.js, Vue.js, Node.js, MongoDB
SmartDoor
Property dealing app connecting brokers and customers for seamless real estate transactions.
Flutter, Firebase, Maps
BitCryp
Personal cryptocurrency portfolio tracker and trading interface with real-time market data.
Flutter, Crypto APIs
HyreBlock (Shut-Down)
Blockchain-based hiring platform reimagining recruitment with decentralized verification.
Flutter, FastAPI, PostgreSQL, Blockchain
4+ Years of Building Apps
Senior Software Engineer
Corefinexperts Global Technologies Pvt Ltd. (DhanXpert)
- •Led development of DhanXpert's Investor & Expert fintech apps (10K+ users), owning architecture and releases across product, design and backend
- •Cut bundle size by 35% and feature delivery time by 40% through modular, feature-first architecture
- •Redesigned user flows and dashboards for apps rated 4.5+ on Play Store
- •Integrated Razorpay payments, push notifications and deep links on Android/iOS
- •Built real-time investor-expert chat plus audio and video calling using WebSockets and ZEGOCLOUD SDK
Senior Flutter Developer
RPA Technologies
- •Led a 4-member team shipping logistics apps (Transporter, Driver, Admin) with role-based access and GPS tracking
- •Integrated a native custom keyboard into Real Madrid's official app via platform channels
- •Built Grey Matters, an Australian healthcare app, natively in SwiftUI with GraphQL
- •Built an AI fitness app generating personalized workout/nutrition plans using OpenAI
- •Migrated a Health & Wellness app to Dart null safety and integrated HealthKit and Google Fit for health data
Founding Member | Software Developer
Hyreblock
- •Built and shipped a full-stack recruitment platform with Flutter Web, FastAPI, PostgreSQL and AWS
- •Designed the backend architecture, database models and APIs for candidate management and job workflows
- •Led both frontend and backend development for the platform
Flutter Developer
Purple Toko
- •Built a retail shopping app from scratch, including a responsive web version using the same Flutter codebase
- •Developed complex features using reusable components and custom widgets, improving maintainability and quality
Flutter Developer
OyeLabs
- •Shipped production Home Services and Grocery apps with REST API integrations and Git workflows
- •Followed coding standards and best practices to reduce bugs, and collaborated with cross-functional teams
Get In Touch
I'm currently open to new opportunities. Whether you have a project in mind or just want to connect, feel free to reach out.
mass.kumar.186@gmail.com