---
title: 'Senior Software Engineer at NextGen Federal Systems'
canonical: 'https://feeny.ai/job/senior-software-engineer-nextgen-federal-systems-colorado-springs-72b44czw42ty'
type: 'job'
last_seen: '2026-10-13'
---

# Senior Software Engineer at NextGen Federal Systems

- **Company:** NextGen Federal Systems
- **Location:** Colorado Springs, CO
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-05-14
- **Last confirmed live:** 2026-10-13
- **Apply:** https://jobs.lever.co/nextgenfed/0a7439cf-6cd7-4fa7-8cc9-34315d826619

## Job description

NextGen Federal Systems, LLC is seeking a Software Engineer with experience in Systems Tool Kit (STK) to support the development and integration of mission analysis and modeling applications. These applications enable multi-domain analysis—including air, space, ground, and maritime systems—by leveraging physics-based modeling and simulation to assess system performance, coverage, communications, and operational effectiveness. Responsibilities include software development, configuration, and execution; result interpretation; documentation; and modification and maintenance of tools and code. The selected candidate must be quick to learn, adaptable, and agile, interfacing directly with end-customers and customer leadership. The software engineer will provide a full range of systems and software engineering to support critical mission analyses.

## Responsibilities

- Develop, customize, and maintain STK-based applications to support mission planning, analysis, and visualization
- Integrate STK (Engine, Components, or Desktop) with external tools, models, and data sources to enable end-to-end mission workflows
- Implement backend services using Python and support frontend interfaces as needed
- Analyze and interpret simulation results, providing actionable insights to engineering teams and stakeholders
- Support traceability between mission analysis outputs and system models, ensuring consistency across the digital engineering environment
- Support deployment and execution of applications in modern environments (e.g., containerized or cloud-based)
- Contribute to documentation, user guides, and technical deliverables
- Troubleshoot and enhance existing tools to improve performance, usability, and scalability

## Qualifications

- BS or equivalent in Computer Science, Engineering, Mathematics, or equivalent technical degree
- 5+ years’ prior work experience in the aerospace or defense industry, with demonstrated software development experience
- Experience customizing or automating STK-based tools or applications highly desired (including STK, STK Engine, STK Components, and/or Cesium)
- Experience integrating tools via APIs (REST or similar)
- Proficiency in Python and experience with backend frameworks such as Flask is required
- Strong expertise in React JS for building modern and responsive user interfaces is highly desirable
- Knowledge of version control systems, preferably Git is highly desirable
- Proven experience as a Full Stack Developer or similar role is highly desirable
- Capable of self-management and responsibly executing multiple tasks in accordance with priorities and deadlines
- Active Top Secret (TS) clearance required (SCI eligibility preferred)

## Preferred Qualifications

- Experience with STK Engine, STK Components, or Cesium
- Experience linking STK analyses to MBSE environments (e.g., parameter passing, trade studies, digital thread integration)
- Familiarity with digital engineering ecosystems, mission thread development, or model orchestration tools
- Experience with Docker, cloud environments, or DevSecOps practices
- Frontend development experience (e.g., React)

About NextGen: NextGen Federal Systems is an innovative technology and professional services provider specializing in advanced software solutions and comprehensive mission and business support services. We work in close collaboration with our customers to truly understand their business and mission goals. Our approach is to design, build, implement, and manage solutions that measurably improve our client’s organizational performance. We have established and foster a corporate culture where we: Treat employees with fairness and respect regardless of their position, sexual identity, race, or tenure. Communicate the importance of our mission and our employees’ contributions to it, ensuring they understand how their job role contributes to the greater good. Openly promote and communicate our ideas for change and adaptability. Strive to achieve results as an organization. Hold employees accountable to their commitments and provide incentives that encourage positive and productive behaviors. Value the talents and contributions of our employees as the key factor for our success. Create an environment where people can engage at all levels. Encourage people to take risks and allow them to make mistakes.

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities.

## About NextGen Federal Systems

## Company Overview
- **One-liner**: NextGen Federal Systems is a mission-focused IT solutions and services provider delivering modern software engineering, AI/ML, digital engineering, and complex mission support to defense, intelligence, and federal customers.
- **Entity Type**: Private (no funding rounds disclosed; organic/steady growth)
- **Headquarters**: Morgantown, West Virginia, United States (with offices in Aberdeen, MD; Dayton, OH; O’Fallon, IL; and additional locations in Beavercreek, OH, Belcamp, MD, Parker, CO, Springfield, VA, Fort Meade, MD, and Washington, DC areas)  
- **Founded**: 2011  
- **Founders**: Jay Reddy (Founder & CEO); Chetan Desai serves as COO ([nextgenfed.com/leadership](https://www.nextgenfed.com/leadership/))

## Core Business
- **Primary industries**: Defense, Intelligence, Federal IT services, Software Engineering, AI/ML, Digital Engineering, Modeling & Simulation
- **Target customers**: B2G — U.S. Department of Defense, intelligence agencies, federal civilian agencies, and commercial companies
- **Mission**: "NextGen is committed to enabling mission success and driving innovation that shapes the future of national security and beyond" ([LinkedIn](https://linkedin.com/company/nextgenfed))

## Products & Services
- **Federal Mission AI Platform**: Secure, governable agent-publishing environment built for operational domains, including "Weather Wingman Agents" and other mission-specific AI agents.
- **ReadiChat**: Secure AI platform for mission-specific agents — an "AI-assisted agent factory" enabling custom workflows, mission-ready agents, and domain-specific capabilities such as electronic warfare agents.
- **Weather Analyst®**: Weather forecasting and analysis tool that delivers user-tailored advisories, platform/sensor impact rules, and decision support for mitigating or exploiting weather conditions.
- **StratusML®**: A machine learning platform with a hardened, modular codebase, reproducible results, secure ML prototyping, low-code/no-code workflows, and Govcloud accreditation.
- **Digital Arsenal**: Secure DevSecOps (DSO) platform with ATO for AWS GovCloud, code security scans, automated testing, Platform as Code (PaC) compliance (cATO-compliant), and tenant onboarding.
- **SADIE™**: Constructive and high-fidelity simulation platform that automates simulation execution and supports Digital Mission Engineering (DME) threat analysis.
- **Professional Services**: Modern software engineering, AI/ML, digital engineering, complex mission support, CI/CD automation, cloud-native development, continuous testing, human-centered design, and secure system development ([nextgenfed.com](https://www.nextgenfed.com/))

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Estimated annual revenue of **$36.6M** and **183 employees** (down 1.9% YoY, -5 people) based on LinkedIn company data ([LinkedIn](https://linkedin.com/company/nextgenfed))
- **Notable Investors/Partners**: No external investors disclosed. Key customers span DoD, Intelligence, and Federal markets. Certifications include ISO 9001 and CMMI-DEV/CMMI-SVC Level 3.
- **Growth Signals**: Recognized by the INC 5000 as one of the fastest-growing companies in the U.S. in **nine of the last ten years**; steady expansion of office locations and job openings across Maryland, Ohio, Illinois, West Virginia, Virginia, Colorado, and Washington, DC ([nextgenfed.com](https://www.nextgenfed.com/))

## Competitive Advantages
- **Dual model of services and product development**: Combines government services contracts with proprietary, saleable platforms — rare among smaller federal contractors.
- **Secure AI/ML platforms built for the mission environment**: Govcloud-accredited products like StratusML and Digital Arsenal address strict federal security and compliance requirements.
- **Deep domain specialization**: Focus on defense, intelligence, electronic warfare, weather, and digital mission engineering creates high barriers to entry.
- **Mature engineering processes**: CMMI-DEV Level 3, CMMI-SVC Level 3, and ISO 9001 certification signal disciplined delivery.
- **Employee-centric culture**: High ratings (4.3/5 on LinkedIn from 65 reviews) and testimonials emphasize collaboration, trust, transparency, and a people-first approach that supports retention and recruiting ([LinkedIn](https://linkedin.com/company/nextgenfed))

## Strategic Focus
- **Scaling AI/agentic AI for federal missions**: Hiring "Application/Agentic AI Engineer" and "Edge AI/Model Optimization Engineer" roles indicates a push toward on-device and agent-driven AI solutions.
- **Expanding DevSecOps and cloud-native infrastructure**: Digital Arsenal and DevSecOps roles point to continued investment in secure software delivery pipelines.
- **Enhancing digital engineering and simulation**: SADIE and modeling & simulation hires align with DoD’s shift toward digital mission engineering and simulation-based testing.
- **Supporting multi-location growth**: Open positions span multiple states, suggesting geographic expansion of delivery and client-facing teams ([jobs.lever.co/nextgenfed](https://jobs.lever.co/nextgenfed))

## Why Work Here
- **Culture**: Employees describe a "collaborative, people-first culture" with approachable, transparent leadership and a "close-knit, respectful environment" even as the company grows.
- **Work style**: Teams are distributed and flexible. Employees report the ability to "manage their work while continuing to learn and grow" and a "shared commitment to delivering great outcomes for customers."
- **Engineering experience**: A "technology-focused environment where your ideas are welcomed, your development is encouraged, and everyone is working toward the same goals." Knowledge-sharing sessions, technical learning, and cross-team collaboration are common.
- **Perks and engagement**: Team lunches, HR check-ins, technical knowledge-sharing sessions, and opportunities to take initiative.
- **Reviews**: LinkedIn employer rating of **4.3/5** with sub-scores: Work-Life 4.3, Compensation 3.9, Culture 4.3, Career 4.0 ([nextgenfed.com/careers](https://www.nextgenfed.com/careers/)) ([LinkedIn](https://linkedin.com/company/nextgenfed))

## Sources
1. [NextGen Federal Systems — Main website](https://www.nextgenfed.com/)
2. [NextGen Federal Systems — Careers](https://www.nextgenfed.com/careers/)
3. [NextGen Federal Systems — Lever job board](https://jobs.lever.co/nextgenfed)
4. [NextGen Federal Systems — Leadership](https://www.nextgenfed.com/leadership/)
5. [NextGen Federal Systems — LinkedIn company page](https://linkedin.com/company/nextgenfed)

## Other roles at NextGen Federal Systems

- [Aviation and Maritime Safety and Statistical Analysis Specialist](https://feeny.ai/job/aviation-and-maritime-safety-and-statistical-analysis-specialist-nextgen-5mk97tpr090b) — Washington, District of Columbia
- [Systems Engineer](https://feeny.ai/job/systems-engineer-nextgen-federal-systems-riverside-bqwj22w1hmzn) — Riverside, CA
- [AI/ML Principal Engineer](https://feeny.ai/job/ai-ml-principal-engineer-nextgen-federal-systems-aberdeen-hca8vgj0z2jg) — Aberdeen, MD
- [Simulation Engineer](https://feeny.ai/job/simulation-engineer-nextgen-federal-systems-colorado-springs-br1qy60g031k) — Colorado Springs, CO
- [Occupational Safety Specialist](https://feeny.ai/job/occupational-safety-specialist-nextgen-federal-systems-aberdeen-zxkm0q5k8zav) — Aberdeen, MD
- [Chief MS&A Engineer](https://feeny.ai/job/chief-ms-a-engineer-nextgen-federal-systems-dayton-mx7pb31wkgps) — Dayton, OH
- [Cloud Solutions Engineer (Data & Platform)](https://feeny.ai/job/cloud-solutions-engineer-data-platform-nextgen-federal-systems-falls-church-5pnxn3mbkzfa) — Falls Church, VA
- [Senior Systems Engineer](https://feeny.ai/job/senior-systems-engineer-nextgen-federal-systems-dayton-tjfearqr5ks2) — Dayton, OH
- [Tech Lead Principal Systems Engineer](https://feeny.ai/job/tech-lead-principal-systems-engineer-nextgen-federal-systems-dayton-8454dq6a48g1) — Dayton, OH
- [Senior Engineering Manager / Analyst](https://feeny.ai/job/senior-engineering-manager-analyst-nextgen-federal-systems-washington-ssr5nr7e0k37) — Washington, District of Columbia