{"id":702184,"url":"https://alion.io/job/northrop-grumman-principal-sr-principal-engineer-software-2","title":"Principal / Sr Principal Engineer Software","company":{"id":12494,"name":"Northrop Grumman","domain":"northropgrumman.com","url":"https://alion.io/company/northropgrumman","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":87,"open_postings":565,"ghost_share":0.002,"stale_share":0.688,"repost_share":0.016,"time_to_fill_p50_days":13,"computed_at":"2026-10-20T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["San Diego, United States","El Segundo, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":114000,"max":171000,"currency":"USD","period":"year","gross":null,"usd_annual":171000},"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon S3","optional":false},{"name":"Angular","optional":false},{"name":"Apache Camel","optional":false},{"name":"Apache HTTP Server","optional":false},{"name":"Apache NiFi","optional":false},{"name":"AWS","optional":false},{"name":"ElasticSearch","optional":false},{"name":"Grafana","optional":false},{"name":"Java","optional":false},{"name":"Prometheus","optional":false},{"name":"React.js","optional":false},{"name":"Spring Boot","optional":false},{"name":"Time Series Forecasting","optional":false},{"name":"Vue.js","optional":false},{"name":"WebSockets","optional":false},{"name":"ActiveMQ","optional":true},{"name":"Docker","optional":true},{"name":"Jackson","optional":true},{"name":"JavaScript","optional":true},{"name":"Micrometer","optional":true},{"name":"Resilience4j","optional":true},{"name":"Testcontainers","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-08-12T00:00:00Z","employer_posted_date":"2026-08-12","last_verified_at":"2026-10-20T07:58:08Z","board_verified":true,"closed_at":null,"days_open":69,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":69},"description":"RELOCATION ASSISTANCE: Relocation assistance may be availableCLEARANCE REQUIRED FOR START: YesCLEARANCE TYPE: Top SecretTRAVEL: Yes, 10% of the TimeDescription\nAt 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’s Aeronautics Systems - Research & Advanced Design (R&AD) transforms breakthrough ideas into mission-ready capabilities through intelligent anticipation. We’re the front-end design engine, defining what comes next. From developing cutting-edge next-generation future aircraft to trailblazing collaborative autonomous platforms, we push the boundaries of technology and forge industry-leading partnerships that set new standards for what’s possible.\nOur team owns the full lifecycle of advanced concept creation, from visionary early-stage designs and rapid prototyping to high-impact demonstrations and solving the toughest technical challenges in survivability, autonomy, and battle management. We seek curious, adaptable people who thrive on turning intuition into breakthrough solutions. If you’re driven to invent the future, build what’s next, and shape the landscape of national security, this is where you belong.\nNorthrop Grumman Aeronautics Systems Sector has an opening for a Principal/Sr Principal Engineer Software onsite in Rancho Bernardo orEl Segundo, California\nAccomplish\nJoin our Research and Advanced Design (R&AD) Division working on exciting new next generation technologies and their rapid deployment to end users.\nKey Responsibilities.:\nEngineer enterprise solutions that align with best practices to support mission critical objectives.\n\nWork on 1-3 mid- to large-scale projects concurrently, assigned from program and internal leadership.\n\nParticipate in regular project design and incremental status meetings.\n\nCollaborate with different teams across the program to discuss, analyze or resolve usability issues and work on projects.\n\nProvide effective communication across multi-functional teams, stakeholders and end-users.\n\nSucceed\nThe individual we seek will be self-motivated, proactive, goal-oriented to help us grow our services, become even better at what we do and will possess the following qualifications.\n**This role may be filled at either the Principal Software Engineer or a Sr. Principal Software Engineer level based on the qualifications below.**\nBasic Qualifications:\nPrincipal Software Engineer: Bachelor’s degree in a Science, Technology, Engineering or Mathematics (STEM) discipline from an accredited university and 5 years of relevant engineering experience OR Master’s degree in a STEM discipline from an accredited university and 3 years of relevant engineering experience; or a PhD and 1 year of experience in a related field.\n\nSr Principal Software Engineer: Bachelor’s degree in a STEM discipline from an accredited university and 8 years of relevant experience OR Master’s degree in a STEM discipline from an accredited university and 6 years of relevant experience; or a PhD and 4 years of experience in a related field.\n\nYour ability to transfer and maintain the final adjudicated Top Secret clearance (Must be in-scope or enrolled in Continuous Evaluation) and any program access(es) required for the position within a reasonable period of time, as determined by the Company.\n\nAbility to obtain Sensitive Compartmented Information (SCI) and Special Program Access (SAP).\n\nEnterprise Integration Patterns (EIP): Proficiency with Spring Integration or Apache Camel to build robust adapters and message routers.\n\nJava 21+ Proficiency, microservice development and front-end interfaces\n\nExperience with Observability technologies, health indicators, and dashboarding including Prometheus and Grafana\n\nExperience with Apache Niagara Files (NiFi)\n\nDeep knowledge of data flow technologies and networking, including UDP, TCP, and hybrid protocols\n\nHybrid S3 Integration: Ability to develop in Java 21+ using the AWS SDK for Java v2 for scenarios where a standalone microservice is more performant than a NiFi processor.\n\nDashboard Development:\nBackend: Java 21+/Spring Boot service with a time-series or document-oriented store (e.g., MongoDB or Elasticsearch) for status history.\n\nFrontend: Proficiency in Angular, React or Vue.js to build the custom \"web app\" for status display.\n\nReal-time Updates: Implementation of WebSockets (via Spring WebSocket) or Server-Sent Events (SSE) to push prober status changes to the dashboard instantly.\n\nMust have the ability to obtain and maintain Special Access Program (SAP) clearance\n\nPreferred Qualifications:\nActive SCI and SAP security clearance.\n\nJava 21+ Mastery: Leverage Virtual Threads (Project Loom) for high-concurrency probing and file processing tasks.\n\nProtocol Translation: Deep experience with Protobuf (Google Protocol Buffers), JAXB/Jackson for XML (UCI) processing, and JSON schema validation.\n\nAsynchronous Messaging: Mastery of JMS (Java Message Service) specifically with ActiveMQ Classic. Candidates should understand connection pooling, message persistence, and dead-letter queue (DLQ) management.\n\nResiliency Patterns: Implementation of Circuit Breakers (e.g., Resilience4j) to handle \"Relay\" failures without cascading into the main effort.\n\nData Pipeline Orchestration: Advanced knowledge of Apache NiFi. Looking for ability to design custom FlowFiles, use ListS3/FetchS3, and implement complex routing logic.\n\nContainerization: Proficiency in Docker/OCI image optimization and deploying standalone Spring Boot apps in resource-constrained environments.\n\nTesting: Mastery of Testcontainers for local integration testing of S3 (LocalStack) and ActiveMQ brokers.\n\nThrive with Us\nAt Northrop Grumman we are invested in the growth and well-being off all our employees. We offer flexible work arrangements, phenomenal learning opportunities, exposure to a wide variety of projects and customers, and a very friendly team environment.\nOur Total Rewards Program offers a comprehensive employee benefits package, including a Retirement and Savings Plan, group medical, dental and vision coverage, life and disability insurance, and flexible spending accounts.\nIf you are ready to join us in defining possible, apply now.\nStream Processing: Familiarity with Project Reactor or Java Streams to process large file metadata efficiently without memory overflows.\n\nCustom Observability: Experience extending Spring Boot Actuator to expose non-standard health indicators and custom metrics via Micrometer.\n\nSchema-Driven Monitoring: Ability to design Avro or Protobuf schemas for transmitting custom observability data to ensure cross-org compatibility.\n\nPrimary Level Salary Range: $114,000.00 - $171,000.00Secondary Level Salary Range: $142,200.00 - $213,400.00The 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. 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