Senior UI Engineer

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 practicesDesign and develop responsive user interfaces and rich browser applications using modern UI frameworks and design patternsPrototype, test, and iterate UI/UX solutions based on user research, journey mapping, and usability principlesBuild scalable backend services and APIs using Java and Spring BootSupport containerized deployments using Docker, and manage builds with MavenImplement and manage GitOps pipelines with Flux and Kustomize for Kubernetes-based environmentsIntegrate services using REST APIs and manage infrastructure using Helm, Kudectl, and RancherLeverage tools such as Git/GitLab, Jira, and Confluence for agile collaboration and trackingDevelop 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 experienceExperience with Java, Spring Boot, and Maven for backend developmentExperience with React, TypeScript, Material UI (MUI), Cypress, Vitest, or Vite for UI developmentExperience with Docker, RESTful APIs, and GitOps workflowsExperience with maintaining and modernizing AWS platformsStrong scripting skills in Python and familiarity with Linux-based developmentIAT 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 MongoDBExperience with Mattemost/HUSTLEExperience with Kubernetes, Helm, Rancher, Flux, and Kudectl in secure DevOps environmentsHands-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 timeOccasionally 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

Created: 2025-09-23