Software Engineer - Level 3 or 4

Company: Northrop Grumman
Location: Boulder
Posted on: April 3, 2026

Job Description:

RELOCATION ASSISTANCE: No relocation assistance available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the Time Description At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today, and for generations to come. Our pioneering and inventive spirit has enabled us to be at the forefront of many technological advancements in our nation's history - from the first flight across the Atlantic Ocean, to stealth bombers, to landing on the moon. We look for people who have bold new ideas, courage and a pioneering spirit to join forces to invent the future, and have fun along the way. Our culture thrives on intellectual curiosity, cognitive diversity and bringing your whole self to work — and we have an insatiable drive to do what others think is impossible. Our employees are not only part of history, they're making history. Northrop Grumman Space Systems, Multi-Domain Operations, and Missile Defense Integration Business Unit (BU) has an exciting career opportunity for a Software Engineer - Level 3 or 4 supporting an Internal Research and Development (IRAD) project to join our team of qualified, diverse, and innovative individuals located in Boulder, CO. Position Overview: As a Software Engineer – Level 3 or Level 4, on an Internal Research and Development (IRAD) team, you will work in a collaborative environment to understand system requirements and create and implement new capabilities. This role may span the full breathe of software development, working on the UI in the frontend with Java/React as well as the backend with Python development. In addition to software development you will also be expected to support reviews of requirements and test cases that are developed for software capability. This IRAD effort is looking to staff over 100 new engineers and will be leveraging new and existing technologies to build fire control systems from the ground up. Essential Functions: Write and test high performing code in an agile environment to support new features and products to support a Fire Control Mission. Ensure the performance, security, and scalability of the application. Collaborate with cross functional teams including frontend developers, Subject Matter Experts, and Systems Engineering teams. Write well-documented, testable code following best practices. Lead and perform code reviews. Contribute to architectural decisions and the overall design of the system. Seeking candidates who find satisfaction in working on challenging and diverse assignments in collaborative settings across all levels. This requisition may be filled at a higher level based on qualifications listed below. Basic Qualifications: This requisition may be filled at either a Software Engineer – Level 3 or a Software Engineer – Level 4. Basic Qualifications for Software Engineer Level 3 or 4: Software Engineer – Level 3: Bachelor’s Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline preferred from an accredited university and 5 years of related work experience, or a Master's Degree and 3 years of related work experience, or 1 year of related work experience with a PhD. Software Engineer – Level 4: Bachelor’s Degree in a STEM (Science, Technology, Engineering or Mathematics) discipline preferred from an accredited university and 8 years of related work experience, or a Master's Degree and 6 years of related work experience, or 4 years of related work experience with a PhD. Applicants must have a current, active in-scope DoD-issued Secret security clearance at the time of application, which is required to start Recent and extensive experience developing UI software in JavaScript/React Recent and extensive experience developing software in Python Quick to learn and absorb new concepts and information Unix/Linux Operating System Experience Experience with Software Change Control, Change Management, Code Quality, Static Analysis, and CI/CD tools such as: Atlassian tool suite, Jira, GitHub, GitLab, SonarQube, Coverity, and Jenkins. Ability and willingness to travel up to 10% to support business needs Must be able to support an in-person / closed-area work environment Preferred Qualifications: Highly experienced with Linux, scripting, and operations Experience with automated software requirements, testing and analysis Experience with Google Protocol Buffers Experience with Kubernetes or other container technologies Experience with Behavior Driven Development (BDD) using tools like Gherkin and Cucumber for automated acceptance testing Experience with battle management and/or fire control systems Experience developing software in a Model Based Systems Engineering (MBSE) environment. Solid background in math and physics Advanced degree in Mathematics or Physics or Computer Science Primary Level Salary Range: $114,000.00 - $171,000.00 Secondary Level Salary Range: $142,200.00 - $213,400.00 The above salary range represents a general guideline; however, Northrop Grumman considers a number of factors when determining base salary offers such as the scope and responsibilities of the position and the candidate's experience, education, skills and current market conditions. Depending on the position, employees may be eligible for overtime, shift differential, and a discretionary bonus in addition to base pay. Annual bonuses are designed to reward individual contributions as well as allow employees to share in company results. Employees in Vice President or Director positions may be eligible for Long Term Incentives. In addition, Northrop Grumman provides a variety of benefits including health insurance coverage, life and disability insurance, savings plan, Company paid holidays and paid time off (PTO) for vacation and/or personal business. The application period for the job is estimated to be 20 days from the job posting date. However, this timeline may be shortened or extended depending on business needs and the availability of qualified candidates. Northrop Grumman is an Equal Opportunity Employer, making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. For our complete EEO and pay transparency statement, please visit http://www.northropgrumman.com/EEO. U.S. Citizenship is required for all positions with a government clearance and certain other restricted positions.

Keywords: Northrop Grumman, Loveland , Software Engineer - Level 3 or 4, IT / Software / Systems , Boulder, Colorado