React.js Developer | C#/.NET APIs | Seattle, WA - Onsite | Contract

Next Gen Software Solutions LLC; Seattle (WA); On-site; USD 110,000 - 150,000; Full time

Job summary

Next Gen Software Solutions LLC is seeking a hands-on React.js developer who can also build C#/.NET APIs. This onsite Seattle contract role requires 5+ years of experience and involves backend API work alongside frontend development, with Azure deployment and CI/CD familiarity.

The ideal candidate will design reusable UI components, integrate with REST APIs, and ensure secure, high-performance web applications. Onsite work requires collaboration with cross-functional teams.

Qualifications

• 5+ years of hands-on experience building modern, scalable web apps.
• Strong React.js, JavaScript/TypeScript, HTML5, CSS3 expertise.
• Hands-on backend REST API development with C#/.NET/.NET Core.

Skills

React.js

TypeScript/JavaScript

C#

.NET/.NET Core

REST APIs

Azure

Tools

React.js

TypeScript/JavaScript

C#

REST APIs

Azure

Job description

Job Title: React.js Developer | C#/.NET APIs

Location: Seattle, WA - Onsite

Duration: 12 Months

Experience: 5+ years

Work mode: 5 days onsite

Type: Contract

Interview type: Virtual - At least 2-3 rounds of interview and there will be coding round from customer.

Job Description

We are looking for a strong hands-on React.js developer who is equally comfortable developing C#/.NET APIs, rather than a frontend developer who only consumes backend APIs.

Mandatory Skills

React.js | TypeScript/JavaScript | C# | .NET/.NET Core | REST APIs | Azure

Required Skills

• 5+ years of hands‑on experience developing modern, scalable web applications.
• Strong expertise in React.js, JavaScript, TypeScript, HTML5, and CSS3.
• Strong hands‑on experience developing backend REST APIs using C# and .NET / .NET Core.
• Experience building reusable React components, hooks, state management, routing, and responsive user interfaces.
• Strong experience integrating React applications with C# REST APIs and backend services.
• Good understanding of API design, authentication/authorization, error handling, performance, and security best practices.
• Hands‑on experience with Microsoft Azure and deploying/supporting web applications and APIs in Azure.
• Experience with Azure App Service, Azure Functions, API Management, Key Vault, or similar Azure services is preferred.
• Familiarity with microservices, CI/CD, Git, automated testing, and cloud-native development.
• Ability to troubleshoot issues across the React UI, C# API, database, and Azure layers and collaborate effectively with Product, QA, DevOps, and engineering teams.

About Next Gen Software Solutions

Next Gen Software Solutions is a trusted provider of IT Staffing and consulting services dedicated to empowering businesses with cutting‑edge technology solutions and exceptional talent. We specialize in delivering tailored IT consulting services, innovative software solutions, and connecting businesses with highly skilled IT professionals. Founded and led by a dedicated U.S. Army solider, Next Gen Software Solutions is deeply rooted in the core values of integrity, discipline, commitment, and experience‑principles that guide every aspect of our operations.

Equal Employment Opportunity Statement

Next Gen Software Solutions is an Equal Opportunity Employer. We are committed to fostering an inclusive and diverse workplace where all employees and applicants are treated respect and dignity. We do not discriminate based on race, colour, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, genetic information, veteran status, or any other legally protected characteristic under applicable federal, state, or local laws.

About Next Gen Software Solutions LLC

Next Gen Software Solutions is a trusted provider of IT staffing and consulting services dedicated to empowering businesses with cutting‑edge technology solutions and exceptional talent. We specialize in delivering tailored IT consulting services, innovative software solutions, and connecting businesses with highly skilled IT professionals. Founded and led by a dedicated U.S. Army soldier, Next Gen Software Solutions is deeply rooted in the core values of integrity, discipline, commitment, and excellence principles that guide every aspect of our operations.