Senior Principal UX Engineer

Job Summary

We are seeking a Senior UX Engineer to provide technical and design leadership for a modern cloud-native modeling simulation and analytics platform supporting next-generation wargaming and real-time decision-making. This role operates at a principal level within the UX and UI domain owning user experience strategy interaction design and front-end implementation quality while working closely with program leadership.

The Senior UX Engineer will translate architectural direction into cohesive scalable and intuitive user interfaces that reflect system intent technical constraints and mission-critical needs. This role is ideal for an engineer who thrives in complex environments leads through influence and drives high standards for UX excellence in support of national defense missions.

Key Responsibilities

• Provide senior-level leadership for UX and UI design across a large complex software program

• Define and maintain UX standards design patterns and UI implementation practices aligned with system architecture

• Translate program leadership guidance into scalable UI frameworks and component-based solutions

• Lead the design and implementation of React-based user interfaces using modern JavaScript and TypeScript

• Guide and mentor UX designers and front-end developers setting expectations for quality and consistency

• Ensure seamless integration across front-end technologies and backend systems (e.g. C# Java)

• Participate in technical planning design reviews and architecture discussions as the UX/UI authority

• Review front-end code and designs to ensure adherence to UX standards architectural direction and best practices

• Advocate for user-centered design while balancing performance security and operational constraints

Required Qualifications

• Active Secret security clearance with eligibility for Top Secret

• 15 years of UX-focused software engineering experience with increasing technical responsibility

• Bachelors degree or higher in Computer Science Computer Engineering or a related STEM field

• Proven experience serving in a senior or lead UX/UI role on complex software systems

• Strong hands-on experience with React

• Proficiency in JavaScript and TypeScript

• Working experience with C# in a UI or full-stack environment

• Familiarity with Java to collaborate effectively with backend teams

• Solid understanding of UI architecture component-based design and front-end design patterns

• Experience building and maintaining reusable UI components and design systems

• Experience integrating UIs with publishsubscribe or event-driven architectures (e.g. Kafka RabbitMQ DDS)

• Experience optimizing UI performance through caching strategies and data write policies

• Familiarity with using databases as caching mechanisms (e.g. Redis SQLite PostgreSQL)

• Ability to work within an established system architecture and apply program-level technical direction

Preferred Qualifications

• Experience supporting large-scale mission-critical or government software programs

• Familiarity with Agile and DevSecOps delivery models

• Experience with accessibility standards and usability testing

Leadership Expectations

• Act as a senior technical partner to program leadership within the UX/UI domain

• Apply sound professional judgment when translating direction into UX solutions

• Lead through a servant leadership mindset influencing teams while maintaining high UX standards

• Deliver regular demonstrations of completed work to government customers and stakeholders