Web App Developer - Senior

Sentar•Chantilly, VA

2d•Onsite

About The Position

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.

Requirements

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

Nice To Haves

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

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.

Benefits

Voluntary Medical, Dental, Vision, with Health Savings or Flexible Spending Plan options
Voluntary Life, Critical Illness, Accident, and Long Term Care insurance options
Group Term Life, Short-Term and Long-Term Disability is provided by Sentar to all qualifying employees
Generous 401(k) match
Competitive PTO plan that graduates quickly with years of service
Other leave programs; holiday schedule along with bereavement, maternity, jury and military duty
Mental health awareness programs
Tuition reimbursement
Professional development reimbursement
Recognition and Awards programs