You will get Secure REST APIs with ASP.NET Core Web API, JWT & Swagger
Project details
Need a secure, scalable, and well-documented REST API for your web, mobile, or SaaS application? I build production-ready ASP.NET Core Web APIs designed for performance, security, and long-term maintainability.
What sets my service apart:
✔ Custom REST API development with ASP.NET Core Web API
✔ Secure JWT Authentication & OAuth 2.0 implementation
✔ Interactive Swagger/OpenAPI documentation
✔ Third-party API integration (Payment, SMS, Email, CRM, ERP)
✔ Clean Architecture & SOLID design principles
✔ Optimized SQL Server, PostgreSQL, or MySQL database performance
✔ API versioning, validation, logging & exception handling
✔ Scalable architecture for SaaS, web & mobile applications
✔ Clean, documented, and production-ready source code
✔ Deployment support for Azure, IIS & Docker
Whether you're building a new backend, extending an existing system, or integrating external services, I deliver reliable APIs with clear communication, on-time delivery, and ongoing support to help your business grow.
What sets my service apart:
✔ Custom REST API development with ASP.NET Core Web API
✔ Secure JWT Authentication & OAuth 2.0 implementation
✔ Interactive Swagger/OpenAPI documentation
✔ Third-party API integration (Payment, SMS, Email, CRM, ERP)
✔ Clean Architecture & SOLID design principles
✔ Optimized SQL Server, PostgreSQL, or MySQL database performance
✔ API versioning, validation, logging & exception handling
✔ Scalable architecture for SaaS, web & mobile applications
✔ Clean, documented, and production-ready source code
✔ Deployment support for Azure, IIS & Docker
Whether you're building a new backend, extending an existing system, or integrating external services, I deliver reliable APIs with clear communication, on-time delivery, and ongoing support to help your business grow.
Programming Languages
Python, ASP.NET, C#Coding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$150
|
Standard
$400
|
Advanced
$900
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 2 | 3 | 5 |
Number of Pages | 5 | 10 | 25 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
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GK
Gergo K.
Jul 26, 2023
.NET ASPX dev wanted to deploy legacy code
He was good. Understood the task and completed it successfully.
About Abdullah Al
ASP.NET Core Expert | Custom Business Software | APIs | SQL Server Opt
Dhaka, Bangladesh - 2:08 am local time
I’m a Senior Full Stack .NET Developer specializing in building scalable, secure, high-performance, and maintainable software solutions for real-world business environments.
I work across the complete software development lifecycle—from requirements analysis, database design, architecture, backend/API development, frontend implementation, testing, performance optimization, deployment, and production support.
My core expertise includes C#, .NET, ASP.NET Core, ASP.NET MVC, Web API, WebForms, Entity Framework Core, ADO.NET, LINQ, SQL Server, REST APIs, React, Next.js, JavaScript, and TypeScript.
🚀 What I Do
✔ Build scalable enterprise web applications
✔ Develop secure ASP.NET Core Web APIs and REST services
✔ Create React/Next.js dashboards and business portals
✔ Optimize SQL Server databases and slow queries
✔ Modernize legacy ASP.NET WebForms and .NET Framework systems
✔ Design ERP, WMS, CRM, inventory, procurement, HR, finance, and logistics systems
✔ Integrate third-party APIs and external services
✔ Troubleshoot production issues and performance bottlenecks
✔ Implement authentication, authorization, and role-based security
✔ Deploy applications using IIS, Windows Server, Azure, AWS, and Docker
💻 Backend & API Development
* C# / .NET / ASP.NET Core
* ASP.NET MVC / Web API / Minimal APIs
* ASP.NET WebForms / .NET Framework
* RESTful API design and integration
* Entity Framework Core, ADO.NET, LINQ
* Dependency Injection and Middleware
* JWT Authentication
* ASP.NET Core Identity
* OAuth 2.0 / OpenID Connect
* API versioning, validation, pagination, filtering, and sorting
* Background services and asynchronous processing
⚛️ Frontend Development
* React
* Next.js
* JavaScript / TypeScript
* HTML5 / CSS3
* Bootstrap / Tailwind CSS
* Responsive web applications
* Enterprise dashboards
* DataTables, charts, reporting, and interactive interfaces
* Legacy frontend modernization
🗄️ SQL Server & Performance Optimization
Database and application performance are key areas of my expertise.
I work with SQL Server, T-SQL, stored procedures, views, functions, CTEs, execution plans, indexing, query optimization, deadlock/blocking analysis, data migration, and large-volume processing.
I investigate performance across the complete stack:
Frontend → API → Business Logic → Data Access → SQL Server → Infrastructure
I optimize slow queries, inefficient stored procedures, missing indexes, N+1 queries, excessive database calls, inefficient EF Core queries, slow APIs, memory/CPU consumption, and large data-processing workloads.
My approach is data-driven: identify → measure → optimize → verify.
🏢 Enterprise Application Development
I specialize in business systems including:
* ERP & Business Management Systems
* Warehouse Management Systems (WMS)
* Inventory Management Systems
* Procurement Management Systems
* CRM Platforms
* Financial & Accounting Systems
* HR Management Systems
* Healthcare Applications
* Education Management Systems
* Logistics & Supply Chain Platforms
* Reporting & Analytics Dashboards
* Workflow & Approval Systems
* Customer & Administration Portals
I focus on understanding the complete business workflow before designing the technical solution.
🏗️ Architecture & Engineering
I use proven architectural principles based on project requirements and complexity:
* Clean Architecture
* Onion Architecture
* Layered Architecture
* Vertical Slice Architecture
* Feature-Based Architecture
* Domain-Driven Design (DDD)
* CQRS
* SOLID Principles
* Design Patterns
* Modular Architecture
* Event-Driven Architecture
* Microservices
I avoid unnecessary complexity and select architecture based on maintainability, scalability, performance, and business value.
🔄 Legacy Modernization
I help businesses modernize existing applications while protecting critical business logic:
* ASP.NET WebForms → ASP.NET Core
* .NET Framework → Modern .NET
* Legacy VB/.NET modernization
* Monolith refactoring
* Legacy database optimization
* API extraction
* Authentication modernization
* Frontend modernization
* Incremental migration strategies
My goal is to improve architecture, security, performance, and maintainability while minimizing business disruption.
☁️ Cloud, DevOps & Production
Experience includes Azure, AWS, IIS, Windows Server, Docker, CI/CD, deployment, logging, monitoring, Redis, Azure Service Bus, Kafka, background workers, distributed caching, retry/resilience strategies, Outbox Pattern, and Saga Pattern.
🔐 Security
I implement secure application practices including JWT, Identity, RBAC, OAuth 2.0, OpenID Connect, secure API design, validation, authorization, and secure data access.
Why Work With Me?
I don't just write code—I focus on solving the underlying business and technical problem.
Let's build software that performs reliably today and scales confidently tomorrow.
Steps for completing your project
After purchasing the project, send requirements so Abdullah Al can start the project.
Delivery time starts when Abdullah Al receives requirements from you.
Abdullah Al works on your project following the steps below.
Revisions may occur after the delivery date.
Based on the requirements complete this.