Web App Developer - Senior

Sentar is proud to be an employee-owned company, fostering a culture of empowerment, collaboration, and innovation. Sentar is dedicated to developing the critical talent that the connected world demands to create solutions to address the convergence of cybersecurity, intelligence, analytics, and systems engineering. We invite you to join the team where you can build, innovate, and secure your career.

Sentar is seeking a Web App Developer - Senior in Chantilly, VA!

Role Description:

Sentar is seeking an experienced Web Application Developer to design, build, and maintain high-quality web-based applications that support the forensic and investigative mission space.

In this role, you will develop scalable, secure, and user-focused solutions across multiple enterprise systems operating in a multi-enclave environment. You will collaborate with cross-functional teams to deliver efficient, testable code aligned with modern development standards and user requirements.

Job Responsibilities

• Design, develop, test, and deploy robust web-based applications using industry best practices.
• Translate UI/UX wireframes into responsive, functional, and maintainable code.
• Perform ongoing maintenance, testing, and troubleshooting to ensure optimal system performance.
• Document applications, services, and environments to support long-term sustainability and knowledge sharing.
• Configure, administer, and manage web application tools and platforms.
• Develop and maintain content for enterprise web applications that support critical decision-making.
• Create and enhance search capabilities, reports, and dashboards.
• Recommend and implement software enhancements and upgrades.
• Ensure compliance with Section 508 accessibility standards.
• Apply security best practices to safeguard applications against vulnerabilities.
• Optimize applications for performance, scalability, and reliability.
• Participate in Agile ceremonies, including Program Increments (PIs) and Agile Release Train (ART) events.
• Provide mentorship and technical guidance to junior developers.

Qualifications:

Clearance Level:

• Active Top Secret (TS) clearance with SCI eligibility and ability to obtain a CI Polygraph

Education:

• Bachelor's degree or master's degree with 8 years of experience of experience OR associate degree with 11 years of experience OR High School/Diploma with 14 years of experience.

Experience:

• Experience working within the SAFe Agile framework.
• Strong knowledge of web application security principles.
• Proven experience developing complex web applications in government or similarly regulated environments.
• Proficiency with modern frontend frameworks such as Angular or React
• Strong experience with JavaScript/TypeScript and HTML5/CSS3
• Experience designing and implementing RESTful APIs
• Familiarity with Bootstrap and other CSS frameworks
• Experience with frontend build tools and package managers
• Backend development experience with technologies such as .NET (C#), Python, or Node.js
• Database integration experience (MySQL, PostgreSQL, Microsoft SQL Server)
• Experience implementing Section 508 accessibility requirements
• Knowledge of web application security best practices and performance optimization techniques

Desired Qualifications

• GraphQL for API development
• Elasticsearch for search and analytics integration
• Messaging technologies such as RabbitMQ, Redis, or similar brokers
• Containerization and orchestration tools (e.g., Docker, Kubernetes)
• Building and maintaining CI/CD pipelines for web applications
• Cloud environments, including AWS GovCloud, SC2S, or C2S
• DevSecOps tools and best practices
• Operating within classified or secure environments
• Active TS/SCI clearance with a CI Polygraph

Benefits at Sentar:

Our unique ownership model attracts top talent, giving employees the freedom to take initiative and drive meaningful improvements. In addition to cultivating a thriving and inclusive work environment, Sentar offers an extensive benefits package designed to support the well-being of employees and their families. Employee ownership is the foundation of our culture, promoting participation, teamwork, and accountability while ensuring