Web App Developer - Senior

SentarChantilly, VA
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
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