Monjel Morshed Sabbir | Android & Full-Stack Developer

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Monjel Morshed Sabbir | Android & Full-Stack Developer

MMS Studio

Selected Work

A focused selection of mobile and web products built for real business needs.

Web project

AponaBD | Full-Stack E-Commerce Platform

AponaBD is a production-ready, bilingual e-commerce platform designed for the Bangladeshi market. It provides customers with a fast, secure, and convenient shopping experience across desktop and mobile devices.I designed and developed the complete platform, including the customer-facing storefront, authentication system, checkout experience, order processing workflow, and a secure role-based administration dashboard.Key FeaturesBengali and English language supportProduct categories, variants, inventory, and SKU managementShopping cart and streamlined checkoutCash on Delivery and local manual payment supportCoupons, flash sales, referral rewards, and customer walletOrder tracking and automated order-status processingCustomer address book and support-ticket systemFraud-aware Cash on Delivery controlsGoogle authentication and two-factor authenticationRole-based dashboards for administrators and support agentsCloud-based product image storageConfigurable business, security, and feature settingsAreaTechnologiesFrontendNext.js, React, TypeScript, Tailwind CSSBackendNext.js Server Actions and APIs, Prisma ORMDatabasePostgreSQL, SupabaseStorageCloudflare R2InfrastructureVercel, Redis, CloudflareSecurityRole-based access control, 2FA, rate limitingMy Role: Founder, Product Designer, and Full-Stack DeveloperProject Type: E-Commerce PlatformWebsite: https://aponabd.com

Web project

Relay | SMS API & Messaging Platform

Relay is a full-stack SMS API and messaging platform built for developers, businesses, and service providers that need a centralized way to send, manage, and monitor SMS communications.The platform combines user-friendly messaging tools with developer-focused APIs. Users can send single or bulk SMS messages, review delivery history, manage their balance and packages, generate API keys, and access API documentation from a dedicated dashboard.Administrators receive complete operational control over users, SMS packages, system balances, connected gateway devices, SMTP configuration, website content, and platform settings.Key CapabilitiesSingle and bulk SMS messagingComplete messaging and transaction historySecure API-key generation and managementIntegrated developer API documentationSeparate user and administrator dashboardsUser, package, balance, and allocation managementSMS gateway device monitoringEmail verification and password recoveryGoogle OAuth and credentials-based authenticationAdministrative settings and SMTP configurationAutomated system-capacity reports through TelegramResponsive light and dark themesRole-based access and protected dashboard routesTechnical HighlightsAreaImplementationApplicationNext.js App Router, React and TypeScriptDatabasePostgreSQL with Prisma ORMUser InterfaceTailwind CSS, Radix UI and custom componentsAuthenticationCredentials, Google OAuth and email verificationMotionFramer Motion micro-interactionsReportingSecure REST endpoint with Telegram integrationPerformanceDatabase indexing, server-side caching and optimized data modelsArchitectureServer and Client Components with composed dashboard layoutsRelay was migrated from a Vite-based React application to a modern Next.js App Router architecture. The migration introduced server-side capabilities, structured routing, reusable layouts, optimized data access, and a more scalable foundation for future development.The result is a polished, developer-ready communication platform that brings messaging, API access, gateway monitoring, account management, and administrative operations into one cohesive system.

Web project3 photos

The Sunnah Store – E-commerce Platform

Project OverviewThe Sunnah Store is a full-featured e-commerce platform built with Next.js and MongoDB. The project was developed collaboratively, with significant work focused on solving complex product-management, browsing, filtering, and user-experience challenges.I worked as a major contributor alongside the original author, implementing new functionality, improving existing features, and solving several technical and usability issues across the platform.My Role and ContributionMy involvement went beyond isolated UI changes. I contributed to both frontend functionality and data-driven application logic, with particular attention to performance, responsive behavior, and smooth product discovery.Key areas I contributed to included:Product management and listing functionalityCategory-based product discovery and filteringResponsive interfaces for desktop and mobile devicesCheckout and shopping workflowsPerformance-focused filtering and user interactionsDebugging and improving existing application logicImplementing additional features as the platform evolvedPerformance-Focused Product FilteringOne notable feature I implemented was a dual-handle price range slider that allows customers to adjust minimum and maximum product prices from either side and immediately see the selected range.The main challenge was ensuring that a highly interactive control did not generate unnecessary database requests whenever the user moved a slider handle.I implemented debounced filtering logic, allowing the interface to remain responsive while controlling when the application executes the underlying product query. This reduced unnecessary repeated requests while preserving a smooth filtering experience for the customer.Product Discovery and User ExperienceThe platform includes structured product browsing and category-based filtering, helping customers narrow down the catalog and reach relevant products more efficiently.Throughout my contributions, I focused on keeping interactions practical across different screen sizes and ensuring that data-driven features remained responsive without introducing avoidable processing or query overhead.Technical ImplementationThe application uses Next.js for the web application and MongoDB for persistent product and commerce data.My work involved integrating frontend interactions with the application's existing data layer, implementing query-sensitive functionality, and improving components without disrupting established business workflows.Key Technical FocusNext.js application developmentMongoDB data integrationDebounced product filteringDynamic price-range selectionResponsive UI implementationProduct and category management workflowsPerformance-conscious database interactionsCross-device compatibilityTeam CollaborationThis was a team-developed project, not an individual build. I worked within the existing architecture and contributed substantially after the original author, extending functionality and resolving complex implementation challenges while keeping new work aligned with the project's existing requirements.The portfolio URL represents a demonstration version of the project. Production deployments are maintained separately and have been used by third parties for business purposes.OutcomeThe project demonstrates my ability to work effectively on an existing production-oriented codebase, understand established application logic, and implement substantial improvements rather than relying on rebuilding features from scratch.It particularly reflects experience with e-commerce workflows, interactive product filtering, database-backed functionality, performance optimization, responsive development, and collaborative software engineering.

Web project

MMS Studio – Digital Products, Services & Payment Platform

Project OverviewMMS Studio is my independently developed technology platform and the foundation for a broader software business I am building over time.Rather than functioning only as a portfolio website, it combines a company presence, developer portfolio, digital product shop, blog, payment verification workflow, and administrative system within a single platform.It has been actively maintained and evolved over time as my products and services have expanded.The ObjectiveI needed a centralized platform where I could present my development work while also handling payments and delivering different types of digital products and services.These offerings include:Software and application subscriptionsIn-app credits and coinsPremium access to apps and websitesAPI and service accessOther digital products and development-related servicesThe goal was to avoid treating the company website, portfolio, shop, and payment workflow as completely separate systems.My RoleMMS Studio is an independently developed and maintained project. I designed and implemented the platform across the frontend, application logic, Firebase integration, administrative tools, and deployment workflow.Because it is also used for my own products and services, development has been driven by practical requirements rather than being built solely as a portfolio demonstration.Digital Product & Service StoreThe shop provides a structured way to publish and sell digital offerings. Products can be organized into application categories and presented with their relevant pricing and information.Customers can purchase items such as subscriptions, credits, and premium access without requiring a traditional physical-product checkout process.Payment Verification & Access DeliveryOne of the platform's important functions is handling manual payment verification.For supported bKash payments, customers provide their transaction ID after completing payment. The system uses this information within the verification workflow and, after successful verification, can generate a redeemable coupon or access code for the purchased offering.This provides a practical bridge between manual payment methods and automated digital fulfillment.AdministrationI built a centralized administrative dashboard to manage the operational side of the platform.It supports functionality including:Secure administrator authenticationProduct and category managementPurchase monitoringPending, approved, and rejected transaction managementWebsite and content configurationManagement of relevant service settingsThis allows products, purchases, and platform content to be maintained without modifying the application directly for routine updates.Portfolio, Content & User ExperienceMMS Studio also acts as the public presence for my software work, providing visitors with information about available products, services, and development projects.A dedicated blog section supports longer-form content alongside the commercial parts of the platform.The interface was designed with a strong focus on a clean and modern experience across mobile, tablet, and desktop devices, keeping navigation between company information, products, content, and purchasing workflows consistent.Technical ImplementationThe platform is built primarily with Next.js, TypeScript, Tailwind CSS, ShadCN UI, and Firebase.Firestore provides the application database, while Firebase Authentication handles secured administrative access. The Next.js application uses the App Router architecture and is configured for deployment on Vercel.Core TechnologiesAreaTechnologyWeb ApplicationNext.js, TypeScriptUITailwind CSS, ShadCN UIDatabaseFirebase FirestoreAuthenticationFirebase AuthenticationOngoing ValueMMS Studio has grown beyond a static company or portfolio website into an operational platform supporting my software products and services.It gives me one place to showcase development work, publish content, offer digital products, process supported payment-verification workflows, and manage purchases and access delivery. Its architecture also gives me a foundation that can continue evolving as MMS Studio expands into a broader technology business.

Web project7 photos

ISP Billing & Network Management Suite

Project OverviewThe ISP Billing & Network Management Suite is a proprietary organizational platform designed to centralize the operational workflows of an Internet Service Provider.The system brings together customer management, billing, network monitoring, payments, support, analytics, and customer self-service within a modular application ecosystem.It consists of three primary areas: an Admin Dashboard, Customer Self-Service Portal, and centralized Documentation module.Business ObjectiveISP operations involve several interconnected processes. Customer accounts must remain synchronized with billing, payments, network infrastructure, communications, and support activities.The platform was developed to provide a centralized system for managing these workflows while maintaining a scalable architecture that could support continued organizational development.My ContributionI contributed to the design and development of this proprietary organizational solution, working on functionality across the platform while following its existing backend and operational requirements.My work involved building and integrating frontend functionality, connecting application interfaces with the Laravel API, implementing data-driven workflows, and contributing to the modular structure of the overall system.Admin DashboardThe administrative application provides centralized visibility and control over day-to-day ISP operations.Core capabilities include:Customer lifecycle and account managementBilling-related workflows and automationMikroTik router monitoringSMS gateway integrationPayment managementRevenue and operational analyticsSupport and complaint managementAdministrative monitoring and controlsThe dashboard was designed to make complex operational information easier to access and manage from a unified interface.Customer Self-Service PortalA separate customer-facing portal allows ISP subscribers to securely access important account functionality without depending on administrators for routine tasks.Customers can:Access and manage their accountsReview billing and payment historyMake supported online payments through bKashView relevant account informationSubmit and track support complaintsThe portal provides a responsive interface with both light and dark modes, maintaining a consistent experience across different devices.Technical ArchitectureThe frontend applications were developed using React and Vite and integrated with a Laravel-based API backend.Axios handles API communication, while TanStack Query is used for efficient server-state management, including data fetching, synchronization, caching, and updates across data-driven interfaces.Monorepo StructureThe system uses a monorepo architecture to organize related applications and shared project resources.This approach keeps the Admin Dashboard, Client Portal, and supporting modules logically separated while allowing them to remain part of a coordinated development and deployment environment.ComponentPrimary PurposeAdmin DashboardISP operations, billing, customers, monitoring and analyticsClient PortalCustomer accounts, billing, payments and supportDocumentationCentralized system and operational documentationAPI BackendLaravel-based business logic and application APIsISP & Network IntegrationThe platform integrates ISP-specific functionality including MikroTik monitoring, connecting business-facing management interfaces with network-related operational data.This makes the project substantially different from a generic billing dashboard. The application has to present customer, financial, support, and network information within workflows suitable for real ISP operations.OutcomeThe project demonstrates experience working on a large, multi-application business system where frontend development must integrate with existing backend APIs, payment services, networking infrastructure, and operational workflows.It also reflects my ability to contribute to proprietary software involving billing systems, customer self-service, network management, API integration, server-state management, and modular application architecture.

Mobile app

CleanKart – Smart Laundry Pickup & Delivery App

Project OverviewCleanKart is a modern Android application designed to digitize the complete laundry service journey, from placing a pickup request to receiving cleaned clothes back at the customer's location.The platform was built to reduce the dependency on phone calls, handwritten records, repeated customer follow-ups, and other manual processes commonly used by local laundry businesses.It creates a structured connection between customers and partner laundry shops, making ordering, status tracking, communication, and service management easier for both sides.Problem & ObjectiveTraditional laundry services often operate through fragmented workflows.Customers may need to call a shop to place an order, explain their pickup address manually, contact the business again for status updates, and coordinate delivery separately.Laundry providers also face operational challenges when handling multiple customers, addresses, orders, promotions, and service updates without a centralized system.CleanKart was designed to bring these activities into one mobile platform.The objective was to create a convenient digital workflow covering:Customer registration and authenticationLaundry pickup requestsDelivery coordinationOrder status trackingCustomer location managementPartner shop collaborationPromotional couponsPush notificationsCustomer feedbackCustomer ExperienceUsers can securely create an account and manage their personal and location information directly from the application.Instead of contacting a laundry shop manually, customers can submit their service request through a structured ordering workflow.After an order is placed, they can follow its progress as it moves through different stages of the laundry process.This reduces uncertainty and gives customers better visibility into the status of their clothes.Pickup & Delivery WorkflowPickup and delivery are central to the service model.CleanKart stores relevant customer and location information so that laundry orders can be associated with the correct pickup and delivery details.This creates a more organized workflow compared with repeatedly collecting addresses through calls or messaging applications.Real-Time Customer CommunicationThe application integrates Firebase Cloud Messaging (FCM) to support push notifications.Notifications can be used to keep customers informed about important service events such as order updates, processing progress, or delivery-related changes.This reduces the need for manual communication while helping users remain informed throughout the service lifecycle.Partner Shop & Role ManagementCleanKart supports different types of users through role-based access and functionality.This allows customers and participating laundry shops to interact with the same platform while receiving features appropriate to their responsibilities.The role-management structure provides a foundation for expanding the application beyond a single laundry provider into a broader service network.Coupons & Customer RetentionLaundry is naturally a repeat-use service, so the application also includes features that support customer retention.Users can access available coupons and promotional offers, creating opportunities for repeat orders and targeted promotions.A built-in feedback system also allows customers to share their service experience after completing an order.Technical ImplementationThe application was developed natively for Android using Java.Firebase Authentication manages secure user access, while Firebase Firestore stores application data such as users, orders, service information, and other operational records.The application follows an MVVM architecture, helping separate UI components, application state, and data-related logic for better maintainability.Core TechnologiesAreaTechnologyMobile PlatformAndroidProgramming LanguageJavaDatabaseFirebase FirestoreAuthenticationFirebase AuthenticationNotificationsFirebase Cloud MessagingAccess ControlRole-Based User ManagementArchitectureMVVMBusiness ValueCleanKart converts a traditionally manual laundry workflow into a structured digital process:Order Request → Pickup → Processing → Status Updates → Delivery → FeedbackFor customers, this provides greater convenience, transparency, and easier communication.For laundry businesses, it creates a more organized foundation for managing orders, customer information, service updates, partner operations, and repeat customer engagement.The project demonstrates practical experience building a service-oriented Android application with authentication, cloud data management, push notifications, role-based functionality, and maintainable application architecture.

Web project