Senior React & Next.js Engineer | .NET & WPF Expert

S3 Connections LLC; New York (NY); On-site; USD 90,000 - 130,000; Full time

Job summary

S3 Connections LLC is seeking a front-end software engineer in New York, NY. You will work with Next.js and React (v16+), create reusable components, and implement responsive UI with TypeScript, JavaScript, HTML5 and CSS3.

You will also collaborate with back-end teams, integrate REST APIs, GraphQL, and WebSockets, and participate in CI/CD workflows using Bitbucket and Bamboo. Strong debugging and communication skills are essential.

Qualifications

• Strong, current hands-on experience with Next.js and React (v16+), building production-grade web applications.
• Proficiency in TypeScript, JavaScript, HTML5, and CSS3, with modern front-end development practices.
• Hands-on development experience with WPF, .NET, and C#, ideally involving enterprise desktop applications or modernization initiatives.
• Demonstrated experience designing, building, and maintaining reusable React components using component-based architecture.
• Experience integrating applications with REST APIs, gRPC/Protocol Buffers, GraphQL, and WebSockets.
• Experience with Git-based version control, particularly Bitbucket, and familiarity with Bamboo CI/CD pipelines.
• Strong debugging, troubleshooting, and problem-solving skills.
• Excellent communication skills and experience collaborating with cross-functional development teams.

Skills

Next.js

React

TypeScript

JavaScript

HTML5

CSS3

WPF

.NET

C#

Reusable components

REST APIs

GraphQL

WebSockets

gRPC

Git(Bitbucket)

Bamboo CI/CD

Debugging

Communication

Collaboration

Job description

S3 Connections LLC is seeking a front-end software engineer in New York, NY. You will work with Next.js and React (v16+), create reusable components, and implement responsive UI with TypeScript, JavaScript, HTML5 and CSS3.

You will also collaborate with back-end teams, integrate REST APIs, GraphQL, and WebSockets, and participate in CI/CD workflows using Bitbucket and Bamboo. Strong debugging and communication skills are essential.