Senior Full-Stack .NET Developer

Radiant Digital; Irving (TX); Hybrid; USD 110,000 - 170,000; Full time

Job summary

Radiant Digital in Irving, TX is seeking a software engineer to join the Corporate Security team. You will design, build, and maintain full-stack solutions across security, compliance, and hazard monitoring, partnering with operators to translate requirements into live software.

You will work with React, Node.js, and SQL databases, perform security scans, and integrate systems with external APIs, while modernizing core services and adopting AI-assisted development to accelerate delivery.

Qualifications

• Bachelor’s degree or four or more years of work experience.
• Three+ years of relevant software engineering experience.
• Three+ years of full-stack engineering with React, Node.js, MS SQL Server, and PostgreSQL.
• Experience with spec-driven development and AI-pair programming tools to accelerate sprint delivery.
• Experience building system-to-system integrations and RESTful APIs.
• Experience executing security scans and remediating vulnerabilities with DAST, SAST, and OSS tools.

Responsibilities

• Drive Forward-Deployed Engagement by translating security, hazard, and compliance requirements into technical specs and live software solutions.
• Engineer Scalable Full-Stack Applications using React, Node.js, SQL Server, and PostgreSQL.
• Accelerate Velocity with AI-Pair Programming to translate requirements into production code.
• Architect System-to-System Integrations connecting security hardware, vendor APIs, and internal platforms.
• Support & Modernize Core Services by refactoring and maintaining existing C#.NET web services and APIs.
• Embed Proactive Application Security with DAST/SAST/OSS scans and remediations.

Skills

Full-stack engineering

React

Node.js

SQL databases

RESTful APIs

AI-pair programming

Spec-driven development

Security scanning

Education

Bachelor’s degree or 4+ years experience

Tools

OWASP ZAP

Fortify

OSS security tools

Job description

Location: Irving, Tx,Alpharetta, GA, or Basking Ridge, NJ (Hybrid - once a week)

Job Description:

The work you'll be doing supports mission- and business-critical applications within the Corporate Security organization. Joining the Security Systems team, you will design, build, and maintain software solutions across legal compliance, hazard monitoring, and physical security domains. You will play a key role in protecting company assets and operations through modern full-stack engineering, automated integrations, and proactive vulnerability management.

• Drive Forward-Deployed Engagement: Partnering directly with domain operators to translate complex security, hazard, and compliance requirements into rapid technical specs and live software solutions.
• Engineer Scalable Full-Stack Applications: Building, scaling, and maintaining enterprise applications and databases using React, Node.js, Microsoft SQL Server, and PostgreSQL.
• Accelerate Velocity with AI-Pair Programming: Leveraging spec-driven development workflows and AI coding tools to rapidly translate operational requirements into high-quality production code.
• Architect System-to-System Integrations: Designing and maintaining critical integrations that connect physical security hardware, third-party vendor APIs, and internal compliance platforms.
• Support & Modernize Core Services: Refactoring and maintaining existing C#.NET web services and APIs to ensure seamless integration with modern frontend architectures.
• Embed Proactive Application Security: Executing DAST (OWASP ZAP), SAST (Fortify), and Open Source Security (OSS) scans, directly remediating findings to uphold strict defense-in-depth standards.

What we’re looking for...

You thrive on the front lines of operational challenges, combining a consultative, problem-solving mindset with engineering execution. You enjoy the challenge of supporting high-consequence applications while exploring ways to automate, optimize, and elevate enterprise safety. You are driven and motivated, with strong analytical skills and a desire to thrive in a fast-paced, secure environment.

You'll need to have:

• Bachelor’s degree or four or more years of work experience.
• Three or more years of relevant software engineering experience, demonstrated through work experience
• Three or more years of full-stack engineering experience with React, Node.js, Microsoft SQL Server, and PostgreSQL.
• Practical experience with spec-driven development and using AI-pair programming tools to accelerate sprint delivery.
• Hands-on experience background building and maintaining complex system-to-system integrations and RESTful APIs.
• Proven background executing security scans and resolving vulnerabilities using DAST (OWASP ZAP), SAST (Fortify), and Open Source Security (OSS) tools.

Even better if you have one or more of the following:

• Experience with C#.NET development (Web and API) to maintain and modernize existing legacy applications.
• Experience building or supporting software in high-performance, high-availability corporate security, compliance, or physical safety domains.
• Strong consultative, rapid-prototyping, and field-debugging skills in high-availability environments.
• Strong analytical, debugging, and system integration troubleshooting skills.

At Radiant Digital, we provide IT solutions and consulting services to help government agencies and businesses in the USA, Canada, the Middle East, and Southeast Asia. On the federal side, we support agencies like NASA, the Department of State (DOS), the IRS, ACL, ACF,USDA and many others, along with numerous state and local government agencies.

We work with industries like telecom, healthcare, entertainment, oil and gas offering solutions designed to meet their specific needs. We focus on improving systems, making better use of data, and updating applications to keep up with changing markets.