Praharsh is available for hire
Hire PraharshPraharsh Bhatt
Verified Expert in Engineering
Mobile App Developer
Toronto, ON, Canada
Toptal member since October 8, 2024
Bio
Praharsh is a seasoned mobile app and Flutter developer with 6+ years of experience in mobile app development and 5+ years as a Flutter specialist. With technical expertise spanning Dart, Firebase, REST APIs, and unit and integration testing, he's an expert at creating high-performing, scalable, and user-centric applications. Praharsh has successfully led and contributed to many projects, including apps with millions of users.
Portfolio
Costco International
Flutter, Dart, Android, Kotlin, Firebase, AWS IAM, CI/CD Pipelines, REST
MGM Resorts
Flutter, Riverpod, Firebase, APIs, REST, GetX, REST APIs, Fastlane
Junglee Games
Flutter, Android, Open-source LLMs, Mobile, iOS, React, Riverpod, WebSockets...
Experience
- Android - 6 years
- Vim Text Editor - 6 years
- Dart - 6 years
- Linux - 6 years
- Flutter - 6 years
- React - 4 years
- iOS - 3 years
- Algorithms - 3 years
Preferred Environment
Linux, Arch Linux, Vim Text Editor, Ubuntu, Flutter, Android
The most amazing...
...app I've developed is Junglee Rummy, a mobile game app that gained over 30 million users globally and became the most popular Rummy app.
Work Experience
Senior Mobile Developer
2024 - 2025
Costco International
- Led development and maintenance of Costco’s international Flutter apps across 12 countries, serving over 6 million monthly active users with a 99.98% crash-free rate.
- Designed and implemented a scalable, modular architecture using BLoC and Clean Architecture principles, reducing build times by 40% and improving maintainability.
- Integrated multi-region CMS and API backends enabling localized promotions, currencies, and UX for diverse markets, including Japan, Korea, and Canada.
- Mentored junior developers on Flutter performance tuning, design systems, and testing pipelines, improving overall code quality and test coverage.
- Collaborated with Costco’s internal branding and compliance teams to ensure global adherence to accessibility and performance benchmarks (core vitals > 90%).
- Implemented CI/CD pipelines using Fastlane and GitHub Actions to automate app delivery, cutting deployment time from days to hours.
- Optimized asset management and caching, improving first load time by 30% and reducing binary size by 20 MB+.
- Championed headless eCommerce architecture, enabling reusability of business logic across mobile and web platforms.
Technologies: Flutter, Dart, Android, Kotlin, Firebase, AWS IAM, CI/CD Pipelines, REST
Senior Flutter Developer
2021 - 2024
MGM Resorts
- Developed a mobile application for internal communications within the company using Flutter.
- Leveraged the Cubit library for state management, GetX for dependency injection, and Rest APIs for communication with the server.
- Wrote unit, integration, and golden tests for the MGM Rewards app.
- Built CI/CD deployment pipelines using Fastlane for publication in app stores.
Technologies: Flutter, Riverpod, Firebase, APIs, REST, GetX, REST APIs, Fastlane
Senior Flutter Mobile Developer
2021 - 2021
Junglee Games
- Developed the Junglee Rummy mobile game in Flutter for Android and iOS.
- Leveraged Riverpod for state management and WebSockets for real-time in-game updates.
- Supported the company by making the app scalable, leveraging Flutter, Firebase, Node.js, and Unity.
Technologies: Flutter, Android, Open-source LLMs, Mobile, iOS, React, Riverpod, WebSockets, Node.js, Firebase, Unity
Senior Flutter Developer
2020 - 2021
Kinderpass
- Helped the company apps grow organically from 10,000 to 500,000+ monthly active users.
- Leveraged REST APIs to manage state management and back-end calls.
- Delivered highly scalable solutions for hosting live video sessions and reduced costs by 100%.
Technologies: Flutter, React, Android, iOS, REST, Java, Dart
Experience
Junglee Rummy
In 2021, I spearheaded the development of Junglee Rummy, which became the most popular Rummy game. This mobile sensation quickly amassed a staggering 30 million users worldwide. Leveraging Flutter, I meticulously crafted and optimized the app's login, profile, cash, in-app purchases (IAP), and help sections during the initial release quarter.
Through these tailored interfaces, the app garnered a remarkable daily reach exceeding 10 million users, underscoring its impact and user engagement. Furthermore, I innovatively designed various iterations of these screens to enhance user experience and conduct comprehensive user research, ensuring continuous refinement and heightened interaction within Junglee Rummy.
Through these tailored interfaces, the app garnered a remarkable daily reach exceeding 10 million users, underscoring its impact and user engagement. Furthermore, I innovatively designed various iterations of these screens to enhance user experience and conduct comprehensive user research, ensuring continuous refinement and heightened interaction within Junglee Rummy.
Extreme Personal Voice Assistant
https://multiverseapp.com/case-study/extreme-personal-voice-assistant/Developed an AI-powered voice assistant for Android during high school, marking the beginning of my development journey. The assistant supported multilingual conversations with a strong focus on user privacy. Designed to be an all-in-one virtual assistant, it handled a wide range of tasks, including answering questions, taking selfies, providing navigation assistance, and delivering personalized updates based on user interests. Within two years of its launch, Extreme Assistant attracted 2+ million users. I actively maintained the app until 2019, after which I decided to unpublish it.
The voice assistant is the second most popular voice assistant app on the Google Play Store after Google Assistant. It was selected for Google’s Made in India initiative in August 2017. It currently has 1+ million active users. The assistant was nominated for the GMASA Awards 2017, third runner-up for the best productivity app after Vodafone and Xender. It helped users dictate highly complex commands to their phone and delivered high
performance, and accurate results to their search queries.
The voice assistant is the second most popular voice assistant app on the Google Play Store after Google Assistant. It was selected for Google’s Made in India initiative in August 2017. It currently has 1+ million active users. The assistant was nominated for the GMASA Awards 2017, third runner-up for the best productivity app after Vodafone and Xender. It helped users dictate highly complex commands to their phone and delivered high
performance, and accurate results to their search queries.
HealStation Foundation | A Nonprofit
https://multiverseapp.com/case-study/healstation-organization-mental-health-mobile-app/Collaborated with the state government of Bihar and Healstation Foundation NGO to revolutionize the traditional process of screening over 100,000 potential patients through door-to-door visits. I developed a comprehensive set of Android, iOS, and web apps using Flutter, providing a highly aggregated view of millions of patients. This significantly streamlined the workflow, reducing the process from weeks to just a few days.
The solution enabled the treatment of over 10,000 mental health patients in rural India within the first year alone. The apps featured offline caching, allowing them to work seamlessly in areas with poor or no internet connectivity.
The success of the project helped NGOs track recovery rates effectively, and HealStation Foundation was awarded first place in Startup India, securing government funding for its impactful mobile solutions.
The solution enabled the treatment of over 10,000 mental health patients in rural India within the first year alone. The apps featured offline caching, allowing them to work seamlessly in areas with poor or no internet connectivity.
The success of the project helped NGOs track recovery rates effectively, and HealStation Foundation was awarded first place in Startup India, securing government funding for its impactful mobile solutions.
Education
2016 - 2020
Bachelor's Degree in Computer Engineering
Gandhinagar Institute of Technology - India
Certifications
DECEMBER 2022 - PRESENT
Graduate Certificate in Artificial Intelligence
Durham College
Skills
Libraries/APIs
React, GetX, REST APIs, Node.js
Tools
Vim Text Editor, Fastlane, AWS IAM
Frameworks
Flutter, Riverpod, Unity
Platforms
Linux, Arch Linux, Ubuntu, Android, iOS, Mobile, Firebase
Languages
Java, Dart, Kotlin
Paradigms
REST
Other
Artificial Intelligence (AI), Open-source LLMs, Light LLMs, Large Language Models (LLMs), Data Structures, Algorithms, Design Systems, APIs, Computer Engineering, WebSockets, Application State Management, CI/CD Pipelines
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