Front End Software Developer

LMI is seeking a Senior Front-End Software Developer to support the development of user interfaces and visualization capabilities for LMI’s Modeling, Simulation, Prototyping, Wargaming, & Analysis platform, RAPTR. This role focuses on enabling analysts, data scientists, and decision-makers to interact with, explore, and understand complex analytical outputs related to future space architectures. You will design and implement intuitive, high-performance interfaces that transform modeling and simulation results into clear, actionable insights. This role also supports the potential evolution of these capabilities into a standalone analytical tool, requiring a strong understanding of scalable, modular front-end architecture. This position is ideal for a developer who enjoys working at the intersection of data visualization, user experience, and analytical workflows, and who can translate complex data into meaningful user interactions. On-site or local support in Colorado Springs is preferred; remote options may be available for the ideal candidate. LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed. Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, healthcare, and energy sectors-helping agencies navigate complexity and outpace change. Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value. Responsibilities:

• Design and develop user interfaces and dashboards that support exploration of modeling, simulation, and trade study results
• Translate analytical outputs into intuitive visualizations, including charts, maps, timelines, and comparative views
• Collaborate with analysts, data scientists, and backend developers to ensure data is accurately and effectively presented
• Build and maintain front-end components and frameworks that support scalable, reusable UI development
• Implement interactive features that enable users to filter, compare, and analyze scenarios and architectures
• Ensure performance and responsiveness when handling large or complex datasets
• Contribute to the design of user workflows, ensuring the interface aligns with how analysts and decision-makers operate
• Support integration with backend APIs and services
• Apply best practices in UI/UX design, accessibility, and maintainability
• Contribute to the potential development of a standalone analytical application, including modular UI architecture and component reuse

• Bachelor’s degree in Computer Science, Software Engineering, or related technical field
• 5-10 years of experience in front-end software development
• Proficiency in modern JavaScript frameworks such as React, Angular, or Vue.js
• Strong skills in JavaScript, HTML, and CSS
• Experience building data-driven user interfaces and dashboards
• Familiarity with data visualization libraries such as D3.js, Chart.js, or similar
• Experience integrating front-end applications with RESTful APIs
• Strong understanding of UI/UX principles and responsive design
• Ability to work in a fast-paced, evolving environment with loosely defined requirements
• Strong communication and collaboration skills, * Experience supporting analytical platforms, modeling & simulation tools, or decision-support systems
• Familiarity with geospatial or time-series visualization (e.g., map-based interfaces, timeline analysis)
• Experience working with large or complex datasets in a front-end environment
• Exposure to space domain applications or defense-related systems
• Experience contributing to or building standalone web applications or products
• Familiarity with modern front-end build tools and state management frameworks
• Active TS/SCI clearance

Security Clearance Requirements Candidate must be eligible to obtain a TS/SCI clearance and willingness to obtain a CI Poly. Candidates with an active TS/SCI or TS with SCI eligibility will be given preference.