Full-Stack .NET Developer – Enterprise API Integration

Orkestra Communications; Quezon City; On-site; PHP 700,000 - 1,000,000; Full time

Job summary

Orkestra Communications is seeking a Full-Stack .NET Developer to build a new digital ordering solution from the ground up. You will own backend services, API integration, and a modern web UI used by sales and service teams.

You’ll work on enterprise API integrations with a major US provider, implement secure APIs, and develop frontend components using React/Angular/Vue to deliver a production-ready solution.

Qualifications

• 3–5 years of professional software development experience.
• Strong hands-on experience with C# and ASP.NET Core.
• Experience developing and consuming REST APIs.
• Experience with a modern frontend framework such as React, Angular, Vue, or similar.
• Experience building responsive web applications and reusable UI components.
• Good understanding of HTTP/HTTPS, authentication, and secure API communication.
• Experience with SQL Server or another relational database.
• Comfortable working with JSON and API documentation.
• Strong analytical and problem-solving skills.
• Ability to work independently, take ownership, and see development tasks through to completion.
• A genuine interest in building new solutions rather than only maintaining existing systems.
• Portfolio or examples of previously built web applications.

Responsibilities

• Build backend services and APIs using C# and .NET / ASP.NET Core.
• Integrate our application with enterprise and third-party REST APIs.
• Work with JSON payloads, API schemas, request/response mapping, and data transformation.
• Implement authentication, authorization, and secure API communication.
• Handle asynchronous workflows, webhooks, integration logging, and error handling.
• Work with SQL Server and relational databases.
• Use tools such as Swagger/OpenAPI and Postman to understand, test, and troubleshoot APIs.
• Build a modern, responsive, and intuitive web application.
• Develop reusable frontend components using React, Angular, Vue, or a comparable modern framework.
• Translate business requirements into practical and user-friendly interfaces.
• Apply modern UI/UX and responsive design practices.
• Continuously improve the application's usability, performance, and overall user experience.
• Work across the development lifecycle, from requirements and design through testing, deployment, and ongoing improvements.
• Translate API documentation and business requirements into complete, production-ready solutions.
• Troubleshoot technical issues and independently develop practical solutions.
• Collaborate with business and technical stakeholders to deliver reliable solutions.
• Document application functionality, integrations, and technical processes.

Skills

C# & .NET

ASP.NET Core

REST APIs

Frontend frameworks

SQL Server

JSON & API docs

OAuth 2.0

Azure

Tools

Swagger/OpenAPI

Postman

Docker

Git

CI/CD

Azure

Job description

About the Role

We are looking for a Full-Stack .NET Developer to join our growing technology team and help build a new digital ordering solution from the ground up.

This is a build-and-own opportunity, not simply a maintenance role. You will be involved in developing the backend, integrating with enterprise APIs, and creating a modern web application that will be used by our sales and service teams.

The project will involve integrating our solution with a major US telecommunications provider's enterprise Mobility & Wireline API, allowing you to work on a real-world enterprise integration project and see your work move from concept to production.

What You'll Do:

Backend & API Integration

• Build backend services and APIs using C# and .NET / ASP.NET Core.

• Integrate our application with enterprise and third-party REST APIs.

• Work with JSON payloads, API schemas, request/response mapping, and data transformation.

• Implement authentication, authorization, and secure API communication.

• Handle asynchronous workflows, webhooks, integration logging, and error handling.

• Work with SQL Server and relational databases.

• Use tools such as Swagger/OpenAPI and Postman to understand, test, and troubleshoot APIs.

Frontend Development

• Build a modern, responsive, and intuitive web application.

• Develop reusable frontend components using React, Angular, Vue, or a comparable modern framework.

• Translate business requirements into practical and user-friendly interfaces.

• Apply modern UI/UX and responsive design practices.

• Continuously improve the application's usability, performance, and overall user experience.

End-to-End Development

• Work across the development lifecycle, from requirements and design through testing, deployment, and ongoing improvements.

• Translate API documentation and business requirements into complete, production-ready solutions.

• Troubleshoot technical issues and independently develop practical solutions.

• Collaborate with business and technical stakeholders to deliver reliable solutions.

• Document application functionality, integrations, and technical processes.

What We're Looking For:

• 3–5 years of professional software development experience.

• Strong hands-on experience with C# and .NET / ASP.NET Core.

• Experience developing and consuming REST APIs.

• Experience with a modern frontend framework such as React, Angular, Vue, or similar.

• Experience building responsive web applications and reusable UI components.

• Good understanding of HTTP/HTTPS, authentication, and secure API communication.

• Experience working with SQL Server or another relational database.

• Comfortable working with JSON and API documentation.

• Strong analytical and problem-solving skills.

• Ability to work independently, take ownership, and see development tasks through to completion.

• A genuine interest in building new solutions rather than only maintaining existing systems.

• Portfolio or examples of previously built web applications.

Nice to Have:

• Experience with OAuth 2.0 / OpenID Connect.

• Experience with Swagger/OpenAPI and Postman.

• Experience with webhooks and asynchronous API workflows.

• Experience with Microsoft Azure.

• Familiarity with Docker, CI/CD, Git, or modern development practices.

• Experience with enterprise systems or third-party API integrations.

• Telecommunications, OSS/BSS, or order management experience.

• Experience building applications from the ground up.

Why Join Us?

Build From the Ground Up

Help create a new application rather than simply maintaining an existing system.

Work on Enterprise Integration

Gain hands-on experience integrating with a major US telecommunications provider's API.

Own Your Work

Have the opportunity to make technical decisions, solve problems, and see your work move from concept to production.

Grow With the Team

Join a growing technology environment where you can expand your technical skills and take on greater ownership as the team and platform evolve.

Make a Real Impact

Build a solution that will directly support our sales and service teams and improve how they work.