Mantech seeks a motivated, career-driven, and customer-focused Sr. UI Engineer to join our team in Hanover, MD .
 

This position will play a key part in building secure, scalable, and mission-enabling applications that support enterprise infrastructure capabilities for a global workforce. This role requires hands-on expertise in both front-end and back-end development, as well as knowledge of infrastructure and DevOps tools in a secure enterprise environment.
 

Responsibilities include, but are not limited to:

• Act as a senior technical consultant delivering expert guidance on full-stack technologies and modern development practices
• Design and develop responsive user interfaces and rich browser applications using modern UI frameworks and design patterns
• Prototype, test, and iterate UI/UX solutions based on user research, journey mapping, and usability principles
• Build scalable backend services and APIs using Java and Spring Boot
• Support containerized deployments using Docker, and manage builds with Maven
• Implement and manage GitOps pipelines with Flux and Kustomize for Kubernetes-based environments
• Integrate services using REST APIs and manage infrastructure using Helm, Kudectl, and Rancher
• Leverage tools such as Git/GitLab, Jira, and Confluence for agile collaboration and tracking
• Develop in Linux environments using scripting languages like Python and tools like IntelliJ IDEA
   

Minimum Qualifications:

• Bachelor’s degree with 12+ years of relevant experience OR associate’s degree with 15 years of relevant experience OR high school diploma/GED with 20 years of relevant experience
• Experience with Java, Spring Boot, and Maven for backend development
• Experience with React, TypeScript, Material UI (MUI), Cypress, Vitest, or Vite for UI development
• Experience with Docker, RESTful APIs, and GitOps workflows
• Experience with maintaining and modernizing AWS platforms
• Strong scripting skills in Python and familiarity with Linux-based development
• IAT I certification (DoD 8140 required within 60 days of starting employment.  Acceptable certifications include A+ CE/CCNA-Security/CND/Network+ CE /CySA+/GICSP/GSEC/Security+ CE/CND/SSCP)
   

Preferred Qualifications:

• Experience with MongoDB
• Experience with Mattemost/HUSTLE
• Experience with Kubernetes, Helm, Rancher, Flux, and Kudectl in secure DevOps environments
• Hands-on experience with JIRA, Confluence, IDEA IDE, and CI/CD pipeline tools such as Git/GitLab
   

Clearance Requirements:

• Must have a current/active TS/SCI with Polygraph
   

Physical Requirements:

• Must be able to remain in a stationary position 50% of the time
• Occasionally moves about inside the office to access file cabinets, office machinery, etc.
• Frequently communicates with co-workers, management, and customers via email, phone, and virtual tools, which may include delivering presentations. Must be able to exchange accurate information in these situations