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Harness Design Engineer
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- $124,500 to $172,725 USD / year
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Added 1 min ago
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(FCRS = US014) Novartis Pharmaceuticals Corporation
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LLNL

Full Stack Software Engineer

Livermore, CA, United States

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Job details

Pay: Pay Range $146,340 - $222,564 Annually $146,340 - $185,544 Annually at the SES.2 level $175,530 - $222,564 Annually at the SES.3 level This is the lowest to highest salary we in good faith believe we would pay for this role at the time of this posting; pay will not be below any applicable local minimum wage.
Posting language: English
Posted: Nov 10, 2026

Original job description

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

Are you energized by the challenge of building robust data management systems that become the backbone of critical scientific work? Do you light up at the intersection of solid software engineering and cutting-edge AI capabilities? We're seeking a software engineer who shares our excitement for creating elegant, scalable data solutions while pushing the boundaries of what's possible with artificial intelligence. This is your opportunity to work on systems where traditional engineering excellence meets the transformative potential of AI. We are seeking a Full Stack Software Engineer to design, develop, and maintain complex software systems supporting mission-critical analytical and operational workflows. You will contribute across the full technology stack, from modern web-based user interfaces to back-end services, data pipelines, and software quality assurance processes. This role requires close collaboration with scientists, engineers, and domain experts to translate complex requirements into robust, maintainable, and scalable software solutions. The work involves developing a modern data management system based on agentic AI workflows that integrate data models, data processing pipelines, and the integration of advanced AI-enabled tooling. This position is programmatically in the Strategic Threat Analysis and Response (STAR) organization and administratively in the Global Security Computing Applications Division (GS-CAD) within the Computing Directorate. This position requires part-time on-site presence due to the nature of the work. This position will be filled at either level based on knowledge and related experience as assessed by the hiring team. Additional job responsibilities (outlined below) will be assigned if hired at the higher level. You will

Collaborate with application owners and developers to analyze business and technical requirements.
Contribute to the deployment and architecture of both commercial off-the-shelf (COTS) and in-house developed applications.
Contribute to the design, development, test, and maintenance of full stack software applications to both front-end user interfaces and back-end services. This includes contributing to the development of front-end applications using modern web frameworks such as React or Angular and the development or back-end services using restful frameworks such as Python (Flask, FastAPI), or Node (Express, Nest, Fastify)
Support and enhance version control and change management workflows, including:
Tracking changes across evolving data and document versions
Participate in the implementation of mechanisms for diffing and comparing new document versions based on encoded graph structures
Refactor existing scripts and prototype code into modular, reusable, and maintainable software components, consolidating functionality where appropriate to improve reliability and extensibility.
Contribute to the development of unit tests and supporting artifacts to ensure software quality, reliability, and maintainability to software quality assurance (SQA) documentation in accordance with project and organizational standards.
Collaborate with multidisciplinary teams, including software developers, domain experts, and stakeholders, to gather requirements, participate in review designs, and provide high-quality software solutions to problems of moderate complexity.
Apply best practices in software engineering, including code reviews, documentation, configuration management, and secure development practices.
Perform other duties as assigned.

Additional job responsibilities, at the SES.3 level

Serve as a technical contact for complex software development efforts, providing technical direction and mentoring to junior and mid-level developers.
Contribute to software quality assurance (SQA) activities, including defining testing approaches, reviewing test coverage, and ensuring compliance with project and organizational requirements.
Perform technical risk assessment and mitigation, identifying potential issues related to architecture, performance, maintainability, or data integrity and proposing effective solutions.

Qualifications

Ability to secure and maintain a U.S. DOE Q-level security clearance, which requires U.S. citizenship.
Bachelor’s degree in computer science, software engineering, or a related technical discipline, or an equivalent combination of education and relevant experience.
Broad experience as a full stack software developer, with contributions to both front-end development (React or Angular frameworks, HTML, CSS, TypeScript, and/or JavaScript) and back-end systems including experience with back-end services using modern Python or Node based frameworks (e.g., API design and integration with databases and external services.)
Proficiency with version control systems (e.g., Git), including branching strategies, change tracking, and collaborative development workflows.
Broad experience developing unit tests and supporting software quality assurance activities.
Proficient analytical and problem-solving skills, with the ability to understand moderately complex to complex requirements and translate into effective software solutions.
Proficient written and verbal communication skills, necessary to effectively collaborate in a team environment and present and explain technical information, with the ability to document designs and communicate technical concepts.

Additional qualifications at the SES.3 level

Advanced experience as a full stack software developer, including contributing to the design and implementation of complex, multi-component software systems.
Demonstrated ability to define and implement testing strategies and to lead software quality assurance (SQA) efforts, including unit testing, integration testing, and documentation.
Experience providing technical leadership and mentorship, including guiding other developers, reviewing designs and code, and promoting software engineering best practices.
Ability to work independently on ambiguous or complex problems, exercising sound technical judgment and initiative to develop effective solutions.

Qualifications We Desire

Master’s degree or PhD in applied data science, computer science, computer engineering, or a related technical field.
Experience with containerization platforms, such as Docker or Kubernetes, and related comprehensive knowledge of DevSecOps concepts.
Experience integrating artificial intelligence (AI) tools and techniques across the software development life cycle (SDLC), such as AI-assisted coding, automated testing, code review, and documentation, to improve developer productivity and software quality.
Comprehensive knowledge and broad experience with Neo4J or other graph databases, including querying, data modeling, and transformation of graph-based data.

Pay Range $146,340 - $222,564 Annually $146,340 - $185,544 Annually at the SES.2 level $175,530 - $222,564 Annually at the SES.3 level This is the lowest to highest salary we in good faith believe we would pay for this role at the time of this posting; pay will not be below any applicable local minimum wage. An employee’s position within the salary range will be based on several factors including, but not limited to, specific competencies, relevant education, qualifications, certifications, experience, skills, seniority, geographic location, performance, and business or organizational needs. Additional Information

Position Information This is a Career Indefinite or At Will appointment. Lab employees and external candidates may be considered for this position.

Why Lawrence Livermore National Laboratory?

Included in 2026 Best Places to Work by Glassdoor!
Flexible Benefits Package
401(k)
Relocation Assistance
Education Reimbursement Program
Flexible schedules (*depending on project needs)
Our values - visit https://www.llnl.gov/inclusion/our-values

Security Clearance This position requires a Department of Energy (DOE) Q-level clearance. If you are selected, we will initiate a Federal background investigation to determine if you meet eligibility requirements for access to classified information or matter. Also, all L or Q cleared employees are subject to random drug testing. Q-level clearance requires U.S. citizenship.

Pre-Employment Drug Test External applicant(s) selected for this position must pass a post-offer, pre-employment drug test. This includes testing for use of marijuana as Federal Law applies to us as a Federal Contractor.

Wireless and Medical Devices Per the Department of Energy (DOE), Lawrence Livermore National Laboratory must meet certain restrictions with the use and/or possession of mobile devices in Limited Areas. Depending on your job duties, you may be required to work in a Limited Area where you are not permitted to have a personal and/or laboratory mobile device in your possession. This includes, but not limited to cell phones, tablets, fitness devices, wireless headphones, and other Bluetooth/wireless enabled devices. If you use a medical device, which pairs with a mobile device, you must still follow the rules concerning the mobile device in individual sections within Limited Areas. Sensitive Compartmented Information Facilities require separate approval. Hearing aids without wireless capabilities or wireless that has been disabled are allowed in Limited Areas, Secure Space and Transit/Buffer Space within buildings.

How to identify fake job advertisements Please be aware of recruitment scams where people or entities are misusing the name of Lawrence Livermore National Laboratory (LLNL) to post fake job advertisements. LLNL never extends an offer without a personal interview and will never charge a fee for joining our company. All current job openings are displayed on the Career Page under “Find Your Job” of our website. If you have encountered a job posting or have been approached with a job offer that you suspect may be fraudulent, we strongly recommend you do not respond. To learn more about recruitment scams: https://www.llnl.gov/sites/www/files/2023-05/LLNL-Job-Fraud-Statement-Updated-4.26.23.pdf

Equal Employment Opportunity We are an equal opportunity employer that is committed to providing all with a work environment free of discrimination and harassment. All qualified applicants will receive consideration for employment without regard to race, color, religion, marital status, national origin, ancestry, sex, sexual orientation, gender identity, disability, medical condition, pregnancy, protected veteran status, age, citizenship, or any other characteristic protected by applicable laws. Reasonable Accommodation Our goal is to create an accessible and inclusive experience for all candidates applying and interviewing at the Laboratory. If you need a reasonable accommodation during the application or the recruiting process, please use our online form to submit a request.

California Privacy Notice The California Consumer Privacy Act (CCPA) grants privacy rights to all California residents. The law also entitles job applicants, employees, and non-employee workers to be notified of what personal information LLNL collects and for what purpose. The Employee Privacy Notice can be accessed here.

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Jobs in the United States