Back End Software Developer (Java, Node.js)

About The Company LMI is a forward-thinking digital solutions provider dedicated to accelerating government impact through innovation, agility, and speed. Headquartered in Tysons, Virginia, the company specializes in delivering mission-critical platforms and AI-driven solutions tailored for federal agencies across various sectors including defense, space, healthcare, and energy.

By investing in advanced technology and prototypes ahead of immediate needs, LMI ensures that its clients stay ahead of emerging challenges and operational demands. Leveraging deep expertise in federal deployment, strategic partnerships, and proven methodologies, LMI enhances operational outcomes, drives lasting value, and strengthens missions. The company's commitment to collaboration and rapid delivery enables government agencies to navigate complexity effectively and maintain a competitive edge in their respective fields.

About The Role We are seeking a highly skilled Senior Back-End Software Developer to join our team supporting the development and enhancement of RAPTR®, LMI's cutting-edge Modeling, Simulation, Prototyping, Wargaming, & Analysis platform. In this role, you will be responsible for designing, implementing, and maintaining robust backend services that empower analysts, data scientists, and engineers to conduct sophisticated analytical studies within the space domain.

Your work will involve translating complex analytical requirements into scalable backend capabilities, including APIs, data pipelines, and integration services that support modeling, simulation, and trade space analysis. This position offers an exciting opportunity for a developer passionate about working at the intersection of software engineering and analytical problem-solving, with a focus on delivering rapid, reliable, and mission-critical solutions. The role is primarily based in Colorado Springs, with options for remote work for the ideal candidate.

Qualifications

• Bachelor's degree in Computer Science, Computer Engineering, or a related technical field
• 5–10 years of experience in backend software development, demonstrating senior-level proficiency
• Proficiency in programming languages such as Python, Java, or Node.js
• Experience designing and implementing RESTful APIs and service-oriented architectures
• Knowledge of relational and NoSQL databases such as PostgreSQL and MongoDB
• Experience supporting data-intensive applications or analytical platforms
• Familiarity with backend frameworks like Django, Flask, or Spring Framework
• Strong understanding of software design principles, performance optimization, and scalable system architecture
• Experience with version control systems such as Git
• Ability to adapt in fast-paced, evolving environments with loosely defined requirements
• Excellent communication and collaboration skills

Responsibilities

• Develop and maintain backend services and application logic supporting modeling, simulation, and analytical workflows within RAPTR®
• Translate analytical and data science needs into functional software features, including data ingestion, scenario configuration, and results management
• Design and implement APIs and service layers facilitating interaction between the platform, analytical tools, and external systems
• Build and manage data pipelines and storage solutions to support large-scale analytical runs and scenario outputs
• Optimize performance and ensure scalability for handling high-volume simulation data
• Collaborate closely with trade space analysts, data scientists, and systems engineers to align backend capabilities with analytical objectives
• Integrate backend services with front-end interfaces and visualization tools to provide seamless user experiences
• Implement security best practices to safeguard sensitive and mission-critical data
• Participate in code reviews, testing, and debugging to maintain high-quality, reliable software
• Support integration efforts with engineering artifacts such as CONOPs, system architectures, interfaces, and data models

Benefits

• Competitive salary within the range of $101,144 to $174,591
• Comprehensive health, dental, and vision insurance plans
• Retirement savings plans with employer contributions
• Generous paid time off and holiday leave
• Opportunities for professional development and continuous learning
• Flexible work arrangements, including remote options for qualified candidates
• Work on impactful projects supporting national security and space domain initiatives

Equal Opportunity LMI is an equal opportunity employer committed to fostering an inclusive environment. We welcome applicants of all backgrounds and do not discriminate based on race, color, religion, gender, gender identity or expression, sexual orientation, national origin, age, disability, or veteran status. We believe diversity enhances innovation and drive our success. All qualified candidates who meet the security clearance requirements are encouraged to apply.