**Description** Job Description **Leidos** has a new and exciting opportunity for a **Principal Software Engineer** in our **National Security Sector's (NSS) Cyber & Analytics Business Area (CABA)** . Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At **Leidos** , we offer **competitive benefits** , including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. **Join us and make a difference in National** **Security!** **Job Summary:** We are seeking a highly experienced Senior Software Engineer to lead the development and evolution of a Kubernetes-native platform used to orchestrate and deploy workloads within its own cluster. This role combines backend architecture, modern UI/UX, and cloud-native technologies, requiring deep technical expertise and cross-team collaboration. **Responsibilities include:** + Own and advance a Kubernetes-native workload orchestration application. + Develop and maintain containerized microservices with modern web-based UI/UX. + Implement cloud-native components leveraging Go, TypeScript, and Python. + Collaborate with engineering teams to ensure operational excellence and system integration. + Improve platform observability and event-driven system performance. + Maintain robust documentation and enforce internal development standards. + Support infrastructure provisioning and automation via Ansible and IaC tools. **Basic Qualifications:** + Bachelors Degree in a technical field and 12 or more years experience + 12+ years of experience of professional software development + Proficiency in Go (Golang), TypeScript, Python, HTML, CSS. + Strong experience with Kubernetes (including Helm, ArgoCD) and container orchestration (RKE2). + Familiarity with Kafka and event-driven architecture. + Expertise in infrastructure provisioning, Ansible CM, and cloud-native ecosystems (e.g., Rancher, CaaS). + Exceptional debugging, problem-solving, and communication skills. + **Clearance Required: Must have an active TS/SCI with Polygraph.** **Preferred Qualifications:** + Familiarity with Atlassian tools (Jira, Bamboo, Fisheye) and Agile/CI workflows. + Experience with Linux/UNIX administration and SIGINT dataflows. + Hands-on experience with Kafka, NiFi, MetalLB, MinIO in production. + Knowledge of observability tools (Prometheus, Grafana) and Rancher Suite (Harvester, Longhorn, KubeVirt). + Infrastructure automation using cloud-init or Terraform. + Familiarity with CI/CD pipelines and Git workflows. + Prior work with AWS technologies (EKS, S3, Lambda, RDS). **At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you – apply today!** Come break things (in a good way). Then build them smarter. We're the tech company everyone calls when things get weird. We don’t wear capes (they’re a safety hazard), but we do solve high-stakes problems with code, caffeine, and a healthy disregard for “how it’s always been done.” **Original Posting:** July 30, 2025 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. **Pay Range:** Pay Range $126,100.00 - $227,950.00 The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. REQNUMBER: R-00163607 All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.