Hourly Library Cleaner Jobs in Washington, DC (NOW HIRING)

We are seeking a talented and detail-oriented Front-End Developer to join our team and help build intuitive, responsive, and accessible user interfaces for our web applications. This role is ideal for someone passionate about user experience, design systems, and modern front-end technologies.
Work Schedule:
M- F 40 hours a week
Essential Responsibilities:

• Develop and maintain scalable, high-performance web applications using modern front-end frameworks.

• Collaborate with UX/UI developers and back-end developers to deliver seamless user experiences.

• Translate design mockups and wireframes into clean, efficient code.

• Optimize applications for maximum speed, scalability, and accessibility.

• Implement responsive designs that work across various devices and screen sizes.

• Ensure cross-browser compatibility and maintain code quality through testing and reviews.

• Stay current with emerging technologies and propose improvements to existing systems.

Minimum Requirements (Knowledge, Skills, and Abilities):

• Proficiency in HTML5, CSS3, Python, C+, JavaScript, and TypeScript.
• Experience with modern frameworks/libraries such as Angular, React, or Vue.js.
• Familiarity with RESTful APIs and asynchronous request handling.
• Understanding of version control systems (e.g., Git).
• Strong attention to detail and a passion for clean, maintainable code.
• Exposure to Agile development environments.

Clearance Required: TS/SCI Full Scope Poly
Minimum Education: Bachelor's degree in computer science, Design, or related field (or equivalent experience).
Minimum Years of Experience: 5
Preferred Qualifications:

• Experience with design systems and component libraries.
• Knowledge of accessibility standards (WCAG) and best practices.
• Experience with performance optimization and analytics tools.
• 3 years of experience in AWS Cloud Development.

Other Responsibilities:
Safety - Amentum enforces a safety culture whereby all employees have the responsibility for continuously developing and maintaining a safe work environment. As appropriate, each employee is responsible for completing all training requirements and fulfilling all self-aid/buddy aid responsibilities, participating in emergency response tasks and serving on safety committees and teams.
Quality - Quality is the foundation for the management of our business and the keystone to our goal of customer satisfaction. It is our policy to consistently provide services that meet customer expectations. Accordingly, each employee must conform to the Amentum Quality Policy and carry out job activities in compliance with applicable Amentum Quality System documents and customer contracts. Each employee must read and understand his/her Quality Management and Customer Satisfaction responsibilities.
Procedure Compliance - Each employee must read, understand and implement the general and specific operational, safety, quality and environmental requirements of all plans, procedures and policies pertaining to his/her job. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status.
#javelin
Compensation Details:
$190,000 - $220,000
The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.
Benefits Overview:
Our health and welfare benefits are designed to support you and your priorities. Offerings include:

• Health, dental, and vision insurance
• Paid time off and holidays
• Retirement benefits (including 401(k) matching)
• Educational reimbursement
• Parental leave
• Employee stock purchase plan
• Tax-saving options
• Disability and life insurance
• Pet insurance

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.
Original Posting:
08/14/2026 - Until Filled
Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.
Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.