Shaikh Wasi Sadman
Full-Stack & Mobile Engineer with 7+ years of experience building scalable cross-platform applications. Expert in React Native, Node.js, and Cloud Infrastructure.
About Me
A skilled Full-Stack developer with over 7 years of hands-on experience building scalable cross-platform apps using React, React Native, Node.js, TypeScript, and Native Technologies. Specialized in agile leadership, DevOps practices, and performance optimization, delivering high-quality user experiences.
Skills & Expertise
Work Experience
My professional journey and career highlights
Lead developer for Coco - Recalls and Scam Alerts mobile application, architecting the complete solution using Expo Router, TypeScript, and MobX State Tree.
- Architected the application with the latest Expo and React Native, using Ignite boilerplate for proper setup.
- Integrated deep linking for post sharing with universal links and custom URL schemes.
- Implemented RevenueCat SDK for in-app purchases and subscription management across iOS and Android.
Led end-to-end development and release of next-gen cross-platform apps under the U-Turn ride-sharing and car rental ecosystem.
- Scaled platform to 10,000+ trip requests, 8,000+ passengers, 2,000+ drivers, and 500+ daily active users with 25% retention rate.
- Built scalable Node.js/Express backend with MongoDB, Redis, BullMQ, and Socket.IO supporting real-time communication at scale.
- Architected server infrastructure with Nginx, PM2, Cloudflare, and automated deployment via GitHub Actions.
Migrated Sea-Flux application from Ionic to React Native for cross-platform compatibility on Web, iOS, and Android.
- Designed and implemented robust Firebase integration for efficient data synchronization across all platforms.
- Developed unified file caching solution using IndexDB for web and Expo File System for mobile.
- Established scalable project architecture with efficient caching strategy and intuitive navigation system.
Developed critical healthcare solutions including Direcht Care, Direcht Wards, and Direcht Learning Disability.
- Contributed to Direcht Care supporting 1,000+ elders in 10+ care homes with digital care planning.
- Developed Direcht Wards for virtual monitoring of patients, easing pressure on hospital beds.
- Built clinical modules: Mood Tracking, Visits, Body Map, Symptoms, Medication (MARS), and Resident Records.
Contributed to various fintech and utility projects including Sohoj, Audra VPN, LaoPay, and Ghoori Learning.
- Developed Sohoj Mobile App serving 100k+ users in 7+ countries with 2,000+ daily active users and 22% retention rate.
- Solely developed Audra VPN for native Android (Java) and iOS (Swift), handling security and UI/UX.
- Developed cross-platform Payment Gateway SDK (Foster, Easy Pay Way) from scratch.
Developed Central Biometric Attendance Management System serving 100+ government offices.
- Integrated biometric scanner devices for seamless data capture and secure storage.
- Managed Play Store deployment and maintained Google Play Console.
Developed cross-platform client and driver apps for courier service with real-time tracking.
- Implemented multi-language and theming support for enhanced accessibility.
- Designed and built RESTful APIs using Laravel for app functionality.
Developed order management application integrated with ERP system for streamlined workflows.
- Built RESTful API using ASP.NET for backend-mobile communication.
- Initiated outreach to 10+ potential clients, establishing key partnerships.
Featured Projects
Showcase of my technical projects and contributions
A comprehensive ride-sharing and car rental platform for Bangladesh. Features real-time tracking, bidding system, live chat, and secure bKash payments. Scaled to 10k+ trip requests and 8k+ passengers.
- Passenger & Driver mobile apps
- Admin Dashboard with analytics
- Real-time bidding engine
- 99.9% uptime infrastructure
Lead developer for mobile app managing product recalls and scam alerts. Features deep linking, in-app subscriptions via RevenueCat, and push notifications for personalized alerts.
- Universal deep linking
- In-app purchase integration
- Atomic design components
- Ignite boilerplate
International utility remittance service trusted by 100k+ users across 7+ countries. Features Payment Gateway integration, Ria Money transfers, fund transfers, and comprehensive financial reporting.
- 2,000+ daily active users
- 22% retention rate
- Bluetooth POS printing
- OTP authentication
Digital care planning software for care homes supporting 1,000+ elders. Transitions paper-based systems to efficient digital workflows with clinical modules and resident tracking.
- Cross-platform (mobile, tablet, web)
- Clinical modules
- Dynamic form builder
- Image processing tools
React Native mobile app for mobile recharge and data pack services. Contributed 80% of the codebase with Firebase integration and deep linking.
- 80% codebase contribution
- Firebase & deep linking
- MobX state management
- Cross-platform (iOS & Android)
Mobile Financial Services (MFS) application for Laos. Architected and wrote 90% of the codebase. Features QR code payments, bill payments, and money transfers.
- 90% codebase architect
- QR code payments
- Bill payments & transfers
- Solo React Native expert
Enterprise security solution for home and business networks. Secures internet connectivity serving users in England, India, and Bangladesh.
- Enterprise-grade security
- Multi-country deployment
- Home & business networks
- Cross-platform native apps
Online learning platform mobile app helping 50k+ students access skill development courses. Built with Capacitor and NuxtJS.
- 50k+ active students
- Skill development courses
- Native app integration
- Firebase analytics & push
Education & Certifications
Academic background and professional credentials
Dhaka, Bangladesh
Patuakhali, Bangladesh
Certifications
Certificate of Language Ability (Score 7.8 in English Speaking)
Emmersion
Let's Work Together
I'm currently available for freelance projects and full-time opportunities. If you need a skilled full-stack developer to bring your ideas to life, let's connect.