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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.

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

Required Qualifications

• 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

Preferred Qualifications

• 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.

Target salary range: $101,144 - $174,591

Disclaimer: The salary range displayed represents the typical salary range for this position and is not a guarantee of compensation. Individual salaries are determined by various factors including, but not limited to location, internal equity, business considerations, client contract requirements, and candidate qualifications, such as education, experience, skills, and security clearances.

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Applicants must meet eligibility requirements for a U.S. Government security clearance. Only US Citizens are eligible for a security clearance. For this position, LMI will only consider applicants with security clearances or applicants who are eligible for security clearances, due to the nature of the work.