Software Engineer, Backend Developer, DevOps

Mid-Senior Level | Full-time Information Technology/Computing | Livermore, CA | 10/21/2026

Reference #: REF
8948BJob Code: SES.
2 Science & Engineering MTS 2 / SES.
3 Science & Engineering MTS 3

Organization:
Computing Position Type:
Career Indefinite Security Clearance:
Anticipated DOE Q clearance (requires U.S. citizenship and a federal background investigation)
Drug Test:
Required for external applicant(s) selected for this position (includes testing for use of marijuana)
Medical Exam:
Not applicable
Company Description Join us and make YOUR mark on the World!

Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthen U.S. security and promote global stability. Our mission spans four critical national security areas nuclear deterrence, threat preparedness, energy security, and multi-domain defense empowering teams to take on the toughest challenges of today and tomorrow. With a culture built on innovation and operational excellence, LLNL is a place where your expertise can make a real impact.

Job Description We have an opening for a Software Engineer to design, build, and operate secure applications and platforms that help scientists and engineers manage and analyze mission critical data. You will own software across its lifecycle - from architecture and implementation through testing, deployment, and operations - while modernizing existing systems and creating reusable capabilities for multiple LLNL programs.

The work spans Python services and REST APIs, modern web interfaces, containerized deployments, scientific visualization, databases, and CI/CD automation. You will partner with scientists, data engineers, and application teams to translate complex workflows into reliable, maintainable software. This is an opportunity to exercise broad technical ownership, influence architecture, and see your work directly support national security missions.

You will join a collaborative software engineering team and work across organizational boundaries on shared tools, standards, and integration approaches. Because some work occurs in secure environments, this position requires an on-site presence approximately three to four days per week. This position is in the Applications, Simulations, and Quality Division (ASQ) within the Computing Directorate, supporting Strategic Deterrence application and data management programs.

This position may offer a hybrid schedule, which includes the flexibility to work from home one or more days per week, after a probationary period. The specifics of the hybrid schedule, including the exact number of days required in the office and virtual work options may vary based on the needs of the team and the organization.

This position will be filled at either level based on knowledge and related experience as assessed by the hiring team. Additional job responsibilities and qualifications will apply if hired at the higher level.

You will Design, build, test, deploy, and maintain secure software applications and services supporting scientific and engineering workflows.

Own features and technical improvements across the software lifecycle, from requirements and architecture through implementation, documentation, release, and operational support.

Design and implement well-documented REST APIs, including appropriate approaches to data modeling, authentication, authorization, versioning, and error handling.

Develop usable web interfaces and scientific visualization capabilities using modern frameworks and libraries.

Build, deploy, and troubleshoot containerized applications, and contribute to CI/CD pipelines, automated testing, observability, and deployment automation.

Partner with scientists, data…