Sani Mridha

Senior React Native Developer

Mobile App Specialist • iOS & Android Expert

Specialized in creating high-performance, cross-platform mobile applications with React Native. From concept to App Store deployment, I deliver pixel-perfect mobile experiences that users love.

iOS

Android

Web

📱

React Native

Cross-Platform

🚀

High Performance

Optimized Apps

🎨

Beautiful UI

Pixel Perfect

Fast & Smooth

60 FPS

<View />
useState()
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About Me

My Journey & Expertise

Transforming ideas into exceptional mobile experiences across healthcare, automotive, and social platforms

Sani Mridha - Senior React Native Developer
Available for
New Projects
6+
Years Exp.
20+
Apps

Senior React Native Developer

With 6+ years of experience, I've specialized in building high-performance mobile applications that serve hundreds of thousands of users worldwide.

My journey started in 2019, and since then, I've delivered 20+ production apps across healthcare, automotive, social media, and e-commerce platforms. From concept to App Store deployment, I ensure every pixel is perfect and every interaction is seamless.

I've led development teams, architected scalable solutions, and consistently delivered projects ahead of schedule. Whether it's implementing real-time auction systems, building custom form builders, or integrating complex third-party SDKs, I bring technical excellence and business value to every project.

Key Expertise

Cross-platform mobile development (iOS, Android, Web)
Real-time features with WebSocket & live bidding
Healthcare apps serving 100K+ active users
Custom form builders & data visualization
CI/CD pipelines & app store deployment
Third-party SDK integration & native modules
20+
Apps Published
400K+
Users Reached
6+
Years Experience
99.5%
Uptime Rate
🏥

Healthcare Innovation

Led development of 5 healthcare apps with 100K+ active users across UK, serving critical patient care needs

Rapid Delivery

Delivered first app version in 20 days for Sweden's largest auto exhibition, Elmia Car Show

🎯

Technical Leadership

Scaled React Native team from 1 to 5 developers, established best practices & code quality standards

📱Mobile-First Technology

Tech Stack

Building with cutting-edge mobile technologies

React Native
TypeScript
Expo
Firebase
Redux
GraphQL

Development Capabilities

Cross-Platform

iOS, Android & Web

Performance

Optimized & Fast

UI/UX Design

Pixel Perfect

App Store

Published Apps

Technical Expertise

Skills & Technologies

Comprehensive skill set spanning mobile development, cloud services, and AI/ML

Mobile Development

React Native CLIExpoReactReact NavigationExpo RouterReact QueryReduxZustand

Languages & Core

JavaScriptTypeScriptPythonJavaObjective-C (native integrations)

Development Tools

XcodeAndroid StudioGitGithubNPMYarnGradleCocoaPods

Backend & Services

FirebaseAWSGoogle APIsRestful APIsSocket (WebSocket)CI/CDPush Notifications

Platforms & Distribution

AndroidiOS (Apple)App Store ConnectGoogle Play ConsoleAgileSentryMixpanel

AI/ML & Advanced

CursorClaude CodeTensorflowGoogle ColabJupyter NotebookNumpyPandasCNNComputer Vision
🛍️

E-Commerce

Product Catalog
Cart
Checkout
Orders
📱

Social Media

Feed
Stories
Messages
Profile
💰

Finance

Dashboard
Transactions
Analytics
Cards
📱

Mobile Apps Portfolio

Production-ready iOS & Android applications serving millions of users worldwide

Bilregistret.ai icon

Bilregistret.ai

Led the development and contributed to the implementation of every module. Developed vehicle search, auction, garage, notification with deeplinking, social login and many more features in the app.

React NativeTypeScriptDeep LinkingSocial LoginPush Notifications
Direcht Care - Healthcare SaaS icon

Direcht Care - Healthcare SaaS

Led the development and contributed to the implementation of every module. Developed multiple dashboards, including features like Food & Drinks, Body Map, Restore Integration, and multidimensional settings.

React NativeTypeScriptAzureHealthcareData Visualization
Direcht LD - Healthcare icon

Direcht LD - Healthcare

Developed dynamic dashboard widgets for real-time data visualization. Developed a Custom Question Builder, Form Builder, Form Assignment, Form Filling, and Analytics, similar to Google Forms.

React NativeTypeScriptForm BuilderAnalyticsReal-time Data
Restore2 - Healthcare icon

Restore2 - Healthcare

Implemented features across mobile, tablet, and web versions of the NEWS2 application, including Past Records, Push Notifications. Integrated third-party SDKs into Android and iOS platforms.

React NativeTypeScriptMulti-platformThird-party SDKsPush Notifications
Direcht Redbook - Healthcare icon

Direcht Redbook - Healthcare

Developed features based on requirements under tight deadlines. Developed features like body temperature and vaccination records, notes, analytics.

React NativeTypeScriptHealthcareAnalyticsRecords Management
Jointly - Wellness Tracking icon

Jointly - Wellness Tracking

Integrated Algolia for enhanced product search functionality. Implemented Mixpanel tracking, AWS services, push notifications, chart-based data rendering.

React NativeAlgoliaAWSMixpanelPush Notifications
BlackPlanet - Social Media icon

BlackPlanet - Social Media

Implemented post feed features, including likes, comments, comment replies, image attachments, in-app and push notifications, click-to-view notifications, and share functionality. Integrated third-party SDKs for enhanced camera functionality, Algolia search, chat, user profiles, friend addition, profile settings.

React NativeSocial FeaturesAlgoliaChatThird-party SDKs
Curbio - Contractor icon

Curbio - Contractor

Developed features tailored to contractors and crew leads. Implemented a custom calendar scheduling system, Algolia search, chat feature, job bidding.

React NativeCalendarAlgoliaChatJob Management
Ask99 - Voting icon

Ask99 - Voting

Implemented post and app sharing features, push notifications on Android and iOS, deep linking. Distributed the app to Google Play Store and Apple App Store.

React NativePush NotificationsDeep LinkingSocial Features
Onest - Ad Listing icon

Onest - Ad Listing

Developed each module of the application from scratch. Developed features like login, product listing, filtering, notifications, profile, payment, feedback, and more. Reported to the CEO and distributed the app on Codecanyon.

React NativeTypeScriptPayment IntegrationNotifications
Nitrx - Social Media icon

Nitrx - Social Media

Developed each module of the application from the ground up. Developed features like login, user feed, QR code-based post search, unique QR generation for posts, like, comment, share, link embedding, keyword search, chatting, voice messaging, profile follow, profile editing, and more.

React NativeQR CodeChatVoice MessagingSocial Features
Services & Expertise

What I Offer

Comprehensive mobile development services from concept to deployment and beyond

Cross-Platform App Development

Build high-performance mobile apps for iOS, Android, and Web with a single React Native codebase.

React Native CLI & Expo
95%+ code reusability
Native performance
App Store deployment
Most Popular

Custom Mobile Solutions

Tailored mobile applications with complex features, real-time capabilities, and third-party integrations.

Real-time features (WebSocket)
Custom form builders
Payment integrations
Push notifications

App Modernization & Migration

Upgrade legacy apps, migrate to React Native, or optimize existing codebases for better performance.

Legacy app migration
Performance optimization
Code refactoring
Architecture redesign

Team Augmentation & Mentoring

Join your team as a senior developer, lead technical initiatives, and mentor junior developers.

Technical leadership
Code reviews
Best practices setup
Team mentoring

MVP Development (Rapid Launch)

Get your mobile app idea to market fast with a fully functional MVP in 3-6 weeks.

Rapid prototyping
3-6 weeks delivery
Core features first
Scalable foundation

Maintenance & Support

Ongoing support, bug fixes, feature updates, and performance monitoring for your mobile apps.

24/7 monitoring
Bug fixes & updates
Performance optimization
Security patches

My Development Process

A proven workflow that ensures quality, speed, and transparency at every stage

01

Discovery

Understand requirements & define scope

02

Design & Plan

Architecture, wireframes & timeline

03

Development

Agile sprints with regular updates

04

Launch & Support

Deployment, testing & maintenance

Ready to bring your mobile app idea to life?

Experience

Delivered 20+ production apps serving 400K+ users across healthcare, automotive, and social platforms

Mar 2025 - Present

Senior React Native Developer (Remote)

Bilregistret Sverige AB

Helsingborg, Sweden

Leading cross-platform development for Sweden's premier vehicle search and car auction platform.

  • Delivered first app version in just 20 days for Sweden's largest auto exhibition (Elmia Car Show), serving 50K+ attendees
  • Built real-time car auction system with socket-based live bidding, processing 1K+ bids daily
  • Implemented vehicle search via registration numbers with 100K+ monthly queries
  • Integrated deep linking and social logins, increasing user onboarding by 45%
  • Led single React Native codebase serving Android, iOS, and Web with 95% code reusability
Jul 2022 - Mar 2025

Senior React Native Developer (Remote)

Sidqam LTD

Manchester, UK

Architected and delivered 7+ healthcare products serving 100K+ users across iOS, Android, and Web platforms.

  • Led development of 5 flagship healthcare apps with combined 100K+ active users across UK
  • Reduced development time by 20% through reusable quality code and industry-leading architecture patterns
  • Built custom Form Builder similar to Google Forms, processing 10K+ patient assessments monthly
  • Developed real-time data visualization dashboards for critical healthcare metrics
  • Managed CI/CD pipelines ensuring 99.5% uptime and efficient automated deployment
  • Integrated 15+ third-party SDKs and partner APIs across multiple healthcare platforms
Feb 2022 - Sep 2023

Senior React Native Developer (Remote)

Upwork

USA

Freelance platform collaborating with 3 companies simultaneously, delivering high-impact mobile solutions.

  • Successfully launched apps for 3 different companies on iOS and Android app stores
  • Implemented Algolia search reducing query response time from 3s to 200ms, improving UX by 90%
  • Integrated native SDKs enhancing app functionality and performance by 35%
  • Eliminated critical bugs pre-launch, achieving 4.5+ star ratings on both app stores
  • Delivered clear CTO reports ensuring transparency and alignment across all projects
Oct 2020 - May 2022

React Native Developer (Onsite)

Lomeyo LLC

Dhaka, Bangladesh

Started as the only React Native developer, grew and led the mobile development team.

  • Built and scaled React Native team from 1 to 5 developers within 18 months
  • Delivered 8+ production apps including social media, e-commerce, and ad listing platforms
  • Developed pixel-perfect UIs across iOS and Android with 98% design accuracy
  • Migrated 3 existing React web apps to React Native, expanding user reach by 150%
  • Leveraged Firebase, Google Maps, and Styled Components serving 100K+ combined users
  • Diagnosed and resolved performance bottlenecks, improving app speed by 40%
Jan 2019 - Dec 2019

.Net Developer Intern (Onsite)

Netsoft Solutions

Dhaka, Bangladesh

Contributed to web application development and backend optimization.

  • Developed and tested web applications using .NET framework
  • Optimized SQL database queries, reducing load times by 30%
  • Built and managed SQL databases with stored procedures supporting 50K+ records
  • Collaborated with senior developers implementing core features and performance enhancements

Get In Touch

Let's discuss your next mobile project

Let's Connect

I'm always interested in hearing about new projects and opportunities. Whether you have a question or just want to say hi, feel free to reach out!

Location

Dhaka, Bangladesh

Availability

Available for freelance projects

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Available for New Projects

Let's Build SomethingExtraordinary Together

Have a mobile app idea? Need a React Native expert? Let's turn your vision into a high-performance app that users love.

Schedule a Call
20+
Apps Delivered
400K+
Users Reached
99.5%
Client Satisfaction
Fast Delivery
Quality Guaranteed
Ongoing Support