Hi 👋, I'm Atiqur, a Senior Software Engineer with over 10 years of hands-on experience building enterprise web applications. I've led development teams and transformed startup ideas into profitable products, including systems that serve millions of users daily.
👨💻 Technical Expertise
✅ Full Stack .NET Development – I specialize in complete application development using the Microsoft technology stack, from database design to user interface implementation.
✅ Backend Mastery – Expert in C#, .NET Core/Framework, and ASP.NET MVC. I've optimized systems to handle high traffic loads and reduced processing times from 2.5 seconds to 700ms through performance tuning.
✅ Frontend Skills – Proficient in Razor pages, Angular, TypeScript, JavaScript, and responsive web design. I create intuitive user interfaces that provide excellent user experiences.
✅ Database Optimization – Advanced SQL Server performance tuning, plus experience with MongoDB and Redis for caching and real-time applications.
🚀 What I Deliver
• Scalable Solutions – Built applications handling 5+ million active users with 300+ transactions per second capacity
• Team Leadership – Successfully led development teams of 4-7 people using Agile methodologies to deliver projects on time
• Cost Optimization – Reduced server costs by 10% through efficient resource utilization and smart architecture decisions
• Business Impact – Converted startup concepts into revenue-generating products within 12 months
🏢 Industry Experience
• E-commerce & Distribution – Developed comprehensive sales and inventory management systems for FMCG and pharmaceutical companies
• Telecommunications – Created engaging quiz platforms integrated with major telecom apps, serving millions of users
• Enterprise Systems – Built robust distribution management systems that transformed traditional offline processes into efficient online platforms
🔧 Technology Stack
• Backend: C#, .NET Core/Framework, ASP.NET MVC, Web API, Entity Framework
• Frontend: Angular, TypeScript, JavaScript, HTML5, CSS3, Bootstrap
• Databases: SQL Server, MongoDB, Redis
• Cloud & DevOps: Azure, AWS, Docker, Git
• Tools: n8n automation, SSRS reporting, REST APIs
💡 My Approach
I focus on understanding your business needs first, then architect solutions that not only solve immediate problems but scale with your growth. Whether you need to modernize legacy systems, build new applications from scratch, or optimize existing performance, I deliver reliable, maintainable code that drives real business results.
Ready to discuss your next project? Let's build something great together!
C#
.NET Core
.NET Framework
ASP.NET
ASP.NET Web API
Windows Forms
Entity Framework
ASP.NET MVC
SQL
Microsoft SQL Server
Microsoft Azure
Angular
Telerik
Microsoft Visual Studio
SQL Server Integration Services
Android
SQLite
HTML
CSS
Md.Rajibul A.
Dhaka, Bangladesh
$40/hr
4.7
111 jobs
Turn your app idea into a launch-ready product for iOS and Android - without managing separate frontend developers, backend developers, and project managers.
I’m Rajibul Ahsan, a Top Rated Senior Full Stack and Mobile Developer with more than 97 completed projects on Upwork. I specialize in Flutter and React Native development for both iOS and Android.
I manage the complete development lifecycle, including frontend, backend, databases, cloud infrastructure, AI functionality, testing, and App Store and Google Play submission - so you work with one accountable technical partner instead of coordinating multiple specialists.
What I Build -
I build cross-platform mobile applications and MVPs for startups and growing businesses - from product planning and architecture to App Store and Google Play publishing.
Mobile Apps I Develop
-Food Delivery and Grocery Apps
-Ride-Sharing and Booking Apps
-Real-time GPS tracking, driver management, scheduling, route calculation, and online payments.
-Social Media and Chat Apps
-Real-time messaging, media sharing, notifications, user profiles, moderation, and in-app support.
-E-Commerce and Marketplace Apps
-Product listings, shopping carts, Stripe payments, Shopify integrations, order tracking, and seller dashboards.
-Fitness and Sports-Tracking Apps
-Activity tracking, progress reports, subscriptions, reminders, and wearable or health-service integrations.
-Task Management and Productivity Apps
-Team collaboration, task assignment, scheduling, file sharing, and progress tracking.
-Real Estate and Inventory Management Apps
-Property listings, booking management, inventory tracking, search filters, maps, and admin dashboards.
-AI-Powered Mobile Apps
-ChatGPT integration, AI assistants, smart recommendations, automated workflows, content generation, and LLM-powered features.
Every application is developed with responsive layouts, smooth UI interactions, secure architecture, scalable code, reliable API integration, and strong performance across iOS and Android devices.
Recent Work Includes -
* A fintech and payments application featuring Stripe integration, real-time order tracking, and scheduling capabilities.
* An emergency communication application using Twilio masked calling and the WhatsApp Business API within a QR-based workflow.
* AI-powered connection and matchmaking applications incorporating OpenAI and LLM technology.
* Ride-sharing and marketplace applications with live geolocation, real-time tracking, and in-app payment processing.
Why Clients Keep Hiring Me -
I deliver clean, scalable, and maintainable code while communicating clearly throughout the project. I respond quickly, provide regular progress updates, and take a proactive approach to identifying and resolving potential issues.
I also provide realistic timelines instead of overpromising to win a project. Clients return for additional work because their applications are delivered reliably, perform as expected, and remain easy to maintain and expand.
How I Work -
Discovery call and scope definition → architecture and technology selection → weekly testable builds → backend, AI, and payment integrations → quality assurance across devices → App Store and Google Play submission → post-launch support.
Technology Stack -
Flutter, React Native, Node.js, Firebase, Supabase, Stripe, OpenAI and LLM APIs, REST APIs, push notifications, real-time chat, and cloud infrastructure.
Send me your app idea or existing codebase, and I’ll respond with a practical technical approach and realistic timeline-no generic, copy-and-paste response.
Highlighted Skills -
Full Stack Development | Mobile App Development | Flutter Development | React Native Development | iOS App Development | Android App Development | Cross-Platform App Development | AI App Development | MVP Development | SaaS Development | Web App Development | API Development | API Integration | Backend Development | Node.js | TypeScript | Next.js | Laravel | PHP | Firebase | Supabase | MySQL | PostgreSQL | Stripe Integration | Shopify Integration | OpenAI API | LLM Integration | AI Automation | REST API | WebSockets | Real-Time Chat | Push Notifications | Google Maps Integration | User Authentication | In-App Purchases | Cloud Infrastructure | AWS | App Store Deployment | Google Play Deployment
Flutter
Mobile App Development
App Development
React Native
Android App
iOS Development
REST API
Android App Development
Firebase
Dart
AI Chatbot
AI App Development
AI Agent Development
Back-End Development
FlutterFlow
Kotlin
Laravel
MERN Stack
UI/UX Prototyping
Supabase
Md. Mazedur R.
Dhaka, Bangladesh
$30/hr
5.0
9 jobs
I have over 16 years of professional software development experience, including 5 years of hands-on experience with Oracle FLEXCUBE Core Banking (CBS). Throughout my career, I have designed, developed, enhanced, and maintained enterprise applications for banking and business domains using Microsoft technologies, Oracle databases, and cloud platforms.
My core expertise includes:
* Oracle FLEXCUBE (CBS)
* C#, ASP.NET, ASP.NET Core, .NET Core, Web API
* Oracle PL/SQL, Microsoft SQL Server (MSSQL), MySQL, PostgreSQL
* Database Migration (MSSQL ↔ MySQL, Oracle ↔ MSSQL, data migration, schema conversion, ETL, and data validation)
* Database Administration (DBA) activities, including database installation, backup & recovery, performance tuning, indexing, query optimization, user/security management, monitoring, and maintenance
* Java, Entity Framework, Dapper
* Angular, JavaScript, HTML, CSS, jQuery
* AWS and Azure Cloud
* SSRS, Crystal Reports
* Git, TFS, Bitbucket, Jira, and Agile development
What I can bring to your project:
* Clean, scalable, and maintainable code
* Strong database design, administration, and performance optimization
* Database migration between MSSQL, MySQL, Oracle, and PostgreSQL with minimal downtime and data integrity
* Experience integrating APIs and enterprise systems
* Fast issue diagnosis and reliable bug fixing
* Clear communication and on-time delivery
* Ability to work independently or collaborate effectively with your team
Having worked as a Senior Developer and Team Lead, I understand both the technical and business aspects of software development. Whether you need a new application, enhancements to an existing system, database migration, database administration, performance tuning, or long-term development support, I can deliver high-quality solutions that align with your business goals.
I would be happy to discuss your project in more detail and recommend the most effective approach. I am available to start immediately and look forward to contributing to your project’s success.
Thank you for taking the time to read my profile. I hope to speak with you soon!
If you’re looking for high-quality work, fast turnaround, and reliable technical expertise at a fair price, please don’t hesitate to contact me.
Transact-SQL
SQL Server Reporting Services
.NET Framework
Oracle
SQLite
Microsoft SQL Server
.NET Core
SQL
SAP Crystal Reports
C#
PostgreSQL
NoSQL Database
API Integration
MySQL Programming
MySQL
A K M Golam Muhit O.
Dhaka, Bangladesh
$17/hr
4.9
13 jobs
I am a Senior Data Engineer and Microsoft Business Intelligence Specialist with 17+ years of experience in designing, developing, and optimizing enterprise data solutions. I help businesses transform raw data into powerful insights and automate business processes using the Microsoft technology stack.
My expertise covers the full data lifecycle — from database design and ETL development to data warehousing, reporting, and business automation.
I specialize in building scalable, efficient, and secure data solutions using SQL Server, SSIS, SSAS, Power BI, Microsoft Fabric, and Power Apps.
💡 What I Can Help You With
✔ SQL Server database design, optimization, and performance tuning
✔ Complex stored procedures, queries, and indexing strategies
✔ ETL development using SSIS and modern data pipelines
✔ Data warehouse design and implementation
✔ Microsoft Fabric data engineering and analytics solutions
✔ Power BI dashboards, DAX modeling, and reporting
✔ SSRS, RDLC, Crystal Reports, and paginated reports
✔ Power Apps business applications and workflow automation
✔ ERP and business application database support
🚀 My Approach
I focus on delivering:
Clean and scalable architecture
High-performance database solutions
Business-focused dashboards and reports
Automation of manual processes
Reliable and maintainable systems
Every solution I build is designed with real-world business needs, performance, and long-term scalability in mind.
🎯 Why Clients Hire Me
✔ Deep expertise in Microsoft data ecosystem
✔ Strong background in ERP and enterprise systems
✔ Problem-solving mindset with business understanding
✔ Proven experience in complex database environments
✔ Clear communication and on-time delivery
📊 Technologies I Work With
SQL Server | SSIS | SSAS | SSRS | Power BI | DAX | Microsoft Fabric | Power Apps | Azure Data Services | Crystal Reports | RDLC
If you're looking for a reliable expert who can handle everything from database optimization to advanced BI and automation solutions, I’m ready to help your business turn data into value.
Let’s build something powerful together.
Microsoft SQL Server
SQL Server Integration Services
SQL Server Reporting Services
Microsoft Power BI
Data Modeling
ETL Pipeline
Microsoft Azure SQL Database
Data Engineering
Business Intelligence
Data Visualization
Data Analysis
ERP Software
Data Warehousing
Power Query
Md. A.
Dhaka, Bangladesh
$13/hr
4.8
157 jobs
Desktop
Web Application
Android apps Development
ios app development
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👉 Top Rated Freelancer
👉 3 Years+ programming Experience
Skilled in Computer Technician and Technology. I can handle various issues and task. In a day most of the time work for Official Document and Photo editing and computer servicing for various issue.
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👉 Other’s Experience
👉 1900+ hours of work history
- Programming Experience -
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👉 WPF, ASP .NET Core , Blazor, XAML, Xamarin Form, MAUI, Windows Form,
👉 C#, VB.NET, Entity Framework, LINQ
👉 DevExpress, Telerik
👉 SQL Server, SQLite, MySQL, MS Access
👉 Custom Application and controls
- Other Experience -
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👉 Data Entry (Speed 50-55)
👉 MS Office (Official Document)
👉 Adobe Photoshop (Editing & Designing)
👉 adobe premiere pro (Video Editing)
👉 Technical Support Engineer (Solution Computer Issues)
-Upwork Completed -
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✔️ Radio Frequency Application (Warehouse Management System)
✔️ NGO Management System
✔️ PIZZA-POS System
✔️ XAML for software UI
✔️ WPF Custom/User controls MVVM based
✔️ WPF, XAML and RESX updating
✔️ UI enhancements for WPF application
-Local Completed -
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✔️ NGO Management System
✔️ School Management System
✔️ Point Of Sales
✔️ Courier Management Web Application
- Availability & Efficacy -
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👉40 hours/week
👉 Fast & Best Service
👉 Quick response & communication
👉 Any schedule
any schedule with all I written above, I will deliver the best solution for you and for your task & company. Hope you will be satisfied!
C#
Microsoft Visual Studio
ASP.NET MVC
DevExpress
XAML
ASP.NET Core
Video Editing
Adobe Photoshop
Microsoft Office
Entity Framework
LINQ
Windows Communication Foundation
Data Entry
Technical Support
Microsoft SQL Server Programming
Xamarin
Anabil S.
Dhaka, Bangladesh
$80/hr
4.2
36 jobs
I am a software developer, analyzer, security tester and data processor. I am pursuing a Bachelor of Engineering in Computer Science degree. Computer programming and software developing has always been my core interest and looking forward to build a carrier in this field.
C#
C
Java
Microsoft Windows
Android
Linux
.NET Framework
Desktop Application
Windows Presentation Foundation
Microsoft Visual Studio
Android App Development
Penetration Testing
Windows App Development
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