Sr. Full Stack Developer [.NET and JavaScript (React JS, JSON, and Node.js)] to support buildin[...]

S.i. Systems; Calgary; Remote; CAD 90,000 - 120,000; Full time

Job summary

A leading technology solutions provider is seeking a Sr. Full Stack Developer to build and maintain web applications using .NET and JavaScript technologies like React.js and Node.js. This role involves collaboration with various teams to deliver high-quality products while ensuring performance and security. The ideal candidate has strong experience in both front-end and back-end development and is comfortable working in a remote, Agile environment.

Qualifications

• Experience as a Full Stack Developer building Front-end applications.
• Proven experience in building robust and scalable front-end applications using JavaScript.
• Hands-on experience designing and implementing RESTful APIs.

Responsibilities

• Build, maintain, and scale modern web applications.
• Design, develop, and maintain responsive web applications using React.js and .NET Core.
• Integrate and parse structured data using JSON.

Skills

Reliability security clearance

Full Stack Development

Advanced JavaScript (ES6+)

React.js

.NET Core

Node.js

Education

Bachelor’s degree in computer science or equivalent experience

Tools

Docker

Kubernetes

AWS

Azure

Job description

Overview

Our valued client is looking for a Sr. Full Stack Developer [.NET and JavaScript (React JS, JSON, and Node.js)] to support building, maintaining, and scaling web applications

A 1 year contract. % remote. Must work EST time zone. 7.5 hour work days.

Responsibilities

• Build, maintain, and scale modern web applications that serve both internal and external clients
• This role bridges front-end and back-end development, requiring a deep understanding of architecture, performance optimization, and user experience
• Design, develop, and maintain responsive web applications using React.js and .NET Core
• Build and maintain robust RESTful APIs and microservices with Node.js and .NET
• Integrate and parse structured data using JSON for communication between front-end and back-end systems
• Collaborate with UI / UX designers, PO, BA, DevOps engineers, and QA to deliver high-quality products
• Troubleshoot, debug, and upgrade software and perform regular code reviews
• Work within an Agile / Scrum environment to meet sprint deadlines and deliverables
• Ensure application performance, scalability, and security
• Develop a full-featured customer-facing platform with real-time data updates and analytics
• Implement single-page applications (SPAs) using React that consume backend APIs
• Design back-end services in .NET Core and Node.js, optimized for performance and scalability
• Handle large volumes of data exchange using JSON with strong error handling and validation
• Participate in containerization and cloud deployment (AWS or Azure) as part of CI / CD pipeline

Must have Skills

• Reliability security clearance
• Experience as a Full Stack Developer building Front-end applications
• Proven experience in building robust and scalable front-end applications using modern JavaScript (ES6+). Strong understanding of core JavaScript concepts, asynchronous programming, and browser-based development best practices
• Hands-on experience designing and implementing RESTful APIs. Skilled in creating clean, maintainable endpoints that support efficient data exchange between front-end and back-end systems, with a focus on performance, security, and scalability
• React.js and JavaScript – Advanced front-end development skills for building modern UI components and managing state
• .NET Core – Solid experience in building scalable and maintainable APIs and services
• Node.js + JSON – Proficiency in building middleware and working with structured data interchange formats
• Demonstrates familiarity with application security tools such as Software Composition Analysis (SCA) and Static Application Security Testing (SAST)
• Capable of identifying and monitoring application insights to effectively debug and resolve issues
• Leads technical discussions and conducts peer code reviews to uphold high-quality coding standards

Nice to have

• Bachelor’s degree in computer science or equivalent experience
• Experience with TypeScript, Redux, or GraphQL
• Exposure to Docker, Kubernetes, and cloud platforms like Azure or AWS
• Familiarity with CI / CD pipelines and test automation tools (Jest, Mocha, xUnit)
• Knowledge of database systems like SQL Server, MongoDB, or PostgreSQL