You will get ASP.NET Core API Development | Secure, Scalable & High-Performance APIs
Top Rated
Project details
Need a secure, scalable, and high-performance API built with ASP.NET Core? I help businesses develop enterprise-grade backend systems using clean architecture, SOLID principles, and industry-standard best practices.
With 8+ years of experience in designing and developing modern RESTful APIs, I deliver backend solutions that are fast, reliable, maintainable, and future-proof.
What I Offer
✔ ASP.NET Core API Development
✔ Clean Architecture & SOLID Principles
✔ Entity Framework Core & Database Design
✔ Authentication & Authorization (JWT, OAuth, Identity)
✔ Role-based & Policy-based access control
✔ Dependency Injection & Modular Architecture
Tech Expertise
• ASP.NET Core / .NET 6/7/8
• EF Core / SQL Server / PostgreSQL
• JWT | OAuth | Identity
• ABP Framework | DDD Patterns
• Azure / AWS API Deployments
Why Choose Me?
• 8+ years of .NET backend experience
• Strong focus on clean, maintainable, well-structured code
• Build APIs that are secure, stable, and scalable
• Fast delivery, clear communication, and ongoing support
If you're looking for a professional ASP.NET Core developer to build or improve your API with enterprise-level architecture, let's collaborate.
With 8+ years of experience in designing and developing modern RESTful APIs, I deliver backend solutions that are fast, reliable, maintainable, and future-proof.
What I Offer
✔ ASP.NET Core API Development
✔ Clean Architecture & SOLID Principles
✔ Entity Framework Core & Database Design
✔ Authentication & Authorization (JWT, OAuth, Identity)
✔ Role-based & Policy-based access control
✔ Dependency Injection & Modular Architecture
Tech Expertise
• ASP.NET Core / .NET 6/7/8
• EF Core / SQL Server / PostgreSQL
• JWT | OAuth | Identity
• ABP Framework | DDD Patterns
• Azure / AWS API Deployments
Why Choose Me?
• 8+ years of .NET backend experience
• Strong focus on clean, maintainable, well-structured code
• Build APIs that are secure, stable, and scalable
• Fast delivery, clear communication, and ongoing support
If you're looking for a professional ASP.NET Core developer to build or improve your API with enterprise-level architecture, let's collaborate.
Programming Languages
ASP.NET, C#What's included
| Service Tiers |
Starter
$100
|
Standard
$300
|
Advanced
$500
|
|---|---|---|---|
| Delivery Time | 1 day | 3 days | 10 days |
Number of Revisions | 1 | 3 | Unlimited |
Number of Pages | 1 | 5 | 10 |
Design Customization | - | ||
Content Upload | - | ||
Responsive Design | - | ||
Source Code |
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AS
Armando S.
Oct 4, 2025
.NET Developer Needed to Fix Feature Issues on My Website
I had a great experience working with Arslan on fixing feature issues in my .NET website. He quickly understood the problems, communicated clearly, and delivered effective solutions that restored smooth functionality. His technical expertise, professionalism, and timely delivery made the whole process seamless. I’d highly recommend Arslan for any .NET development work and will definitely hire him again in the future.
FH
Faisal H.
Sep 18, 2025
.NET Developer Needed for a Quick Task
I had a great experience working with Arslan. The task was clearly explained, communication was smooth, and all requirements were provided on time. He is professional, cooperative, and easy to work with. I would be happy to collaborate with him again on future .NET projects. Highly recommended client!
WS
Waqas S.
May 7, 2025
React JS Admin Work
Excellent job with react JS dashboard. I recommend working with Arslan for web development needs
RP
Roman P.
Jan 4, 2024
Create Api service on c#
Great work!
HH
Hilal H.
Aug 30, 2022
Add Filter and Pin option to toolbar
Arslan is super helpful will definitely rehire him for future work
About Arslan
Senior .NET Developer | ASP.NET Core, React, Angular, Azure
100%
Job Success
Lahore, Pakistan - 7:18 am local time
𝐋𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐭𝐡𝐚𝐧 𝐣𝐮𝐬𝐭 𝐚 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫?
Hi, I'm Arslan Zafar—a Senior Full Stack .NET Developer focused on building secure, scalable, and high-performance applications that solve real business problems. With 8+ years of experience, including work with organizations like TCS, T-Mobile, and CBA, I bridge the gap between complex business requirements and clean, scalable technical solutions.
ASP.NET MVC and legacy modernization
Some of my most complex ASP.NET MVC work has been in defence and industrial sectors. I modernized a legacy web platform for a company managing high-uptime naval fleet assets — warships that cannot afford downtime. The ASP.NET MVC rebuild enabled accurate asset tracking, secure document storage, and streamlined access to sensitive operational data. On another engagement I took over a large workplace management SaaS system that a single developer had left behind — no documentation, daily hotfixes, frequent outages. I stabilized the ASP.NET Core back-end, eliminated the performance bottlenecks, and established proper development processes from scratch.
ASP.NET Zero and enterprise acceleration
ASP.NET Zero is my go-to when enterprise clients need multi-tenancy, role-based permissions, and audit logging without spending the first three sprints on boilerplate. I have used it to accelerate delivery on projects in pharma automation, workplace management software, and industrial IoT — cutting setup time significantly and letting the team focus on actual business logic from day one.
Full-stack development across the whole system
Full-stack development for me means owning the entire delivery — ASP.NET Core back-end, Angular or React front-end, Microsoft SQL Server database design, and Azure infrastructure. I built a Shopify fulfillment tool in ASP.NET Core and React that reduced packing mistakes to zero for e-commerce teams — integrating barcode scanning, inventory management, and connections to 8+ shipping providers. I have also delivered a fleet management system in .NET 9 and Angular handling large industrial equipment rental, tracking, and reporting at scale. On the front end I work with Angular, AngularJS, React, TypeScript, JavaScript, and Bootstrap — and I connect them cleanly to ASP.NET back-ends without creating maintenance nightmares six months later.
Keywords
Senior .NET Developer Upwork
Full-Stack .NET Developer Upwork
ASP.NET Core Developer Upwork
ASP.NET MVC Developer Upwork
C# Developer Upwork
.NET Core Developer Upwork
.NET Backend Developer Upwork
.NET API Developer Upwork
REST API Developer Upwork
Microservices Developer Upwork
Enterprise Application Developer Upwork
SaaS Application Developer Upwork
Cloud Application Developer Upwork
Azure .NET Developer Upwork
SQL Server Developer Upwork
Database Architecture Specialist Upwork
Performance Optimization Specialist Upwork
Software Maintenance & Support Upwork
Application Migration & Upgrade Services Upwork
Third-Party Integration Specialist Upwork
Core Skills
ASP.NET Core, .NET Framework, C#, .NET Core, MVC, Web API, Entity Framework Core, SQL Server, Azure SQL, Microservices, RESTful APIs, SignalR, Blazor, Azure, AWS, Docker, CI/CD Pipelines, Agile Development, Responsive Web Design, Frontend Development, Backend Development, Database Management, Scalable Architecture, Cloud Deployment.
Steps for completing your project
After purchasing the project, send requirements so Arslan can start the project.
Delivery time starts when Arslan receives requirements from you.
Arslan works on your project following the steps below.
Revisions may occur after the delivery date.
Client Sends Requirements
Client provides project details, list of API endpoints, database preferences, and any existing code or documentation.