Senior Web Application Developer

AMERICAN SYSTEMS

Senior Web Application Developer at AMERICAN SYSTEMS supporting mission-critical initiatives. Responsible for modernizing secure web applications enhancing data-driven decision-making.

Posted 6/9/2026full-timeWashington • District of Columbia, Washington • 🇺🇸 United StatesSenior💰 $140,000 - $170,000 per yearWebsite

Tech Stack

Tools & technologies

JavaScriptLinuxNode.jsReactSQLTypeScript

About the role

Key responsibilities & impact

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.

Requirements

What you’ll need

Active TS clearance w/SCI eligibility
Bachelor’s degree in computer science or related field (or equivalent years of relevant experience)
8-10 years of relevant experience
Active Security+ CE certificate 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.

Benefits

Comp & perks

Healthcare benefits
Paid leave
Retirement plans
Insurance programs
Education and training assistance
$5,000 sign-on bonus

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

React.jsNode.jsJavaScriptHTMLCSSSQLRESTful APIsGitLinuxAgile

Soft Skills

mentoringstakeholder engagementcode reviewanalytical skillsproblem-solving

Certifications

TS clearanceSecurity+ CEBachelor's degree in computer science