Web Application Developer, Senior (Top Secret Clearance w/SCI eligibility)

AMERICAN SYSTEMS; Dallas (TX); On-site; USD 155,000 - 175,000; Full time

Job summary

AMERICAN SYSTEMS in Dallas, TX is seeking a Senior Web Applications Developer to modernize, secure, and optimize web applications that drive data-informed decisions. You will lead the stack from React to RESTful APIs, refactor legacy code, and ensure scalable performance in an Agile setting.

The candidate must hold a Top Secret/SCI eligibility clearance, have 8–10 years of relevant experience, and possess DoD 8140 IAT II certification or be able to obtain Security+ CE within 90 days of hire.

Qualifications

• Bachelor's degree in computer science or related field.
• 8-10 years of relevant experience.
• Active DoD 8140 IAT II level certification (e.g., Security+ CE or equivalent) or ability to obtain Security+ CE within 90 days of hire.
• Proficiency in React.js, Node.js, JavaScript/HTML/CSS, and SQL.
• Experience developing and integrating RESTful APIs.
• Experience with Git or other version control systems.
• Ability to analyze, refactor, and improve legacy applications.
• Familiarity with Linux (RHEL) administration and update management.
• Experience working in Agile environments, including Scrum or XP methodologies.

Responsibilities

• Modernize and maintain web apps for scalability and performance
• Write modular code in React.js, Node.js, JavaScript, HTML, and CSS
• Refactor legacy code to reduce debt and improve readability
• Build dashboards, workflows, and visualizations for data-driven apps
• Optimize SQL queries and ensure database performance and security
• Define and deliver scalable solutions with stakeholders
• Work in Agile (Scrum, XP, Kanban) environments
• Conduct code reviews and mentor junior developers
• Provide actionable reports and analytics for informed decisions
• Maintain, modernize, and refactor web applications for improved scalability, performance, and maintainability.

Skills

React.js

Node.js

JavaScript

HTML

CSS

SQL

RESTful APIs

Git

Linux (RHEL)

Agile development

Education

Bachelor's degree in computer science or related field

Job description

Job Details

Web Application Developer, Senior (Top Secret Clearance w/SCI eligibility)

Location: US-TX-Dallas

ID: 2026-5039

Category: IT / Cyber Security / Network Systems

Position Type: Full-Time

Remote: No

Clearance Required: Top Secret/SCI

Overview

AMERICAN SYSTEMS, a 100% employee-owned federal government contractor, is seeking a Senior Web Applications Developer to support mission-critical initiatives in Dallas, TX. In this role, you will lead the modernization, enhancement, and maintenance of secure web applications that support data-driven decision-making and operational effectiveness.

The ideal candidate brings deep experience in React.js, Node.js, JavaScript, HTML, CSS, SQL, and RESTful API integration, along with the ability to refactor legacy systems, improve application scalability and performance, and collaborate with stakeholders in Agile development environments.

Responsibilities

• Modernize and maintain web apps for scalability and performance
• Write modular code in React.js, Node.js, JavaScript, HTML, and CSS
• Refactor legacy code to reduce debt and improve readability
• Build dashboards, workflows, and visualizations for data-driven apps
• Optimize SQL queries and ensure database performance and security
• Define and deliver scalable solutions with stakeholders
• Work in Agile (Scrum, XP, Kanban) environments
• Conduct code reviews and mentor junior developers
• Provide actionable reports and analytics for informed decisions
• Maintain, modernize, and refactor web applications for improved scalability, performance, and maintainability.

Qualifications

• Active TS clearance w/SCI eligibility REQUIRED
• Bachelor's degree in computer science or related field (or equivalent years of relevant experience).
• 8-10 years of relevant experience
• Active DoD 8140 IAT II level certification (e.g., Security+ CE or equivalent) or ability to obtain Security+ CE certification within 90 days of hire
• Proficiency in React.js, Node.js, JavaScript/HTML/CSS, and SQL
• Experience developing and integrating RESTful APIs.
• Experience with Git or other version control systems.
• Ability to analyze, refactor, and improve legacy applications.
• Familiarity with Linux (RHEL) administration and update management.
• Experience working in Agile environments, including Scrum or XP methodologies.

NOTE: U.S. Citizenship Required for the purposes of obtaining/holding a U.S. security clearance

Pay Transparency Statement

AMERICAN SYSTEMS is committed to pay transparency for our applicants and employee-owners. The salary range for this position is USD $155,000.00/Yr. - USD $175,000/Yr. Actual compensation will be determined based on several factors permitted by law. AMERICAN SYSTEMS provides for the welfare of its employees and their dependents through a comprehensive benefits program by offering healthcare benefits, paid leave, retirement plans, insurance programs, and education and training assistance.

EEO Statement

EEO Race/Sex/Disability Status/Veteran Status