You will get a Third-Party API & Payment Integration (.NET Core)
Project details
I will integrate any third-party API payment gateways (Stripe, PayPal), SMS/email services (Twilio, SendGrid), or custom REST APIs into your existing .NET Core or ASP.NET application. Fully tested and documented
Programming Languages
JavaScript, ASP.NET, C#Coding Expertise
Cross Browser & Device Compatibility, Localization, Performance OptimizationWhat's included
| Service Tiers |
Starter
$149
|
Standard
$249
|
Advanced
$499
|
|---|---|---|---|
| Delivery Time | 3 days | 6 days | 7 days |
Number of Revisions | 0 | 1 | 3 |
Number of Pages | 3 | 6 | 10 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
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LR
Lucas R.
Jan 19, 2026
30 minute consultation
Usman provided excellent consultation for starting a public sector web application process using ASP.NET and Angular. His guidance was clear and aligned with industry best practices.
SN
Sohail N.
Jan 17, 2026
Backend Developer for Web Portal
Usman Manzoor delivered the .NET Core backend professionally. Initially one issue appeared, but multiple bugs surfaced later and he resolved all of them efficiently within the same budget. Highly recommended.
JB
JAX B.
Jan 16, 2026
30 minute consultation
Usman provided clear and effective IT Services & Support consultation as a Solution Architect. His guidance was practical and valuable. Highly recommended.
MM
Majid M.
Jan 15, 2026
.NET Backend Developer - Pipeline Bug Fix
Usman resolved the pipeline issue quickly with solid .NET and AWS knowledge. Professional and efficient. Highly recommended.
MB
Muhammad B.
Jan 14, 2026
ASP.NET API Integration Expert Needed
Usman Manzoor delivered excellent work on integrating our ASP.NETAPI with a third-party system. I highly recommend Usman for any complex .NET or API integration projects.
About Usman
Senior .NET Core Developer | ASP.NET | Angular | AWS Certified
100%
Job Success
Toba Tek Singh, Pakistan - 8:00 pm local time
I'm a Full-Stack .NET and Angular Developer with 7+ years of professional experience building enterprise-grade web applications for clients in the UK, USA, Japan, and Pakistan. I am AWS Certified Solutions Architect (Associate) and currently working as a Senior Software Engineer at Intagleo Systems, delivering solutions for UK and USA-based product companies.
I have built and shipped real systems, a digital signage platform serving thousands of users globally, a World Bank–sponsored government e-procurement system, a cross-platform education management system for a Japan-based NGO, and enterprise ERP and asset management systems for multiple industries. My work is in production, being used by real organizations, every day.
What I Specialize In
On the backend, I build clean, scalable APIs and services using ASP.NET Core, C#, Web API, and Microservices Architecture. On the frontend, I deliver responsive, maintainable Angular applications. I connect it all with SQL Server, AWS cloud services, and Docker-based deployments with CI/CD pipelines.
Backend: ASP.NET Core · ASP.NET MVC · C# · Web API · Microservices · Entity Framework · LINQ
Frontend: Angular 2–17 · TypeScript · JavaScript · HTML5 · CSS3 · Bootstrap · Kendo UI
Database: Microsoft SQL Server · SAP HANA · PostgreSQL · SQLite · Stored Procedures · Crystal Reports
Cloud & DevOps: AWS (EC2, S3, Lambda) · Docker · Redis · CI/CD · Git
Selected Projects
Signagelive – Digital Signage Platform (UK)
Developed and maintained scalable backend services and Angular components for a digital signage platform serving thousands of enterprise users worldwide.
Stack: .NET Core · Angular 12 · SQL Server · AWS
Creative Realities / Clarity – Digital Experience Platform (USA)
Built and maintained full-stack features for a retail and enterprise digital experience platform used across the United States.
Stack: .NET Core · .NET MVC · Docker · Redis · Kendo UI · SQL Server
BPPRA e-Procurement System – Government of Balochistan
Delivered a complete electronic public procurement platform to automate government procurement workflows for the Balochistan government.
Stack: .NET MVC · AngularJS · SAP HANA · Crystal Reports
PSDP – Public Sector Development Program (World Bank)
Built a project planning and monitoring platform for the Government of Balochistan, sponsored by the World Bank.
Stack: .NET Core · Angular 8 · Microservices · SQL Server
NFEMIS – Education Management System (JICA-AQAL, Japan)
Developed a cross-platform education management system for a Japan-funded NGO, including a mobile app, offline support, and a web admin panel.
Stack: .NET Core · Angular 6 · Ionic · SQLite · RDLC Reports
Industries I Have Worked In
Government & Public Sector - Digital Signage & Retail Technology - ERP & Business Automation - Education & NGO Platforms - SaaS & Cloud Applications - Asset & Facility Management
What You Can Expect Working With Me
Every project starts with understanding your requirements properly not just jumping into code. I communicate clearly, give regular updates, flag issues early, and deliver production-ready work. I don't disappear after delivery. I care about whether the software actually works for your business long-term.
Whether you need a new system built from scratch, an existing application modernized to .NET Core, API integrations, cloud deployment on AWS, or ongoing maintenance — I can handle it end to end.
If you have a project in mind, let's talk about it.
Steps for completing your project
After purchasing the project, send requirements so Usman can start the project.
Delivery time starts when Usman receives requirements from you.
Usman works on your project following the steps below.
Revisions may occur after the delivery date.
Review project requirements
I will analyze your payment flow needs and confirm the correct PayPal/Stripe setup.
Integrate PayPal/Stripe APIs
I will connect your website/app with the required payment API and configure authentication.