HPC Software Developer

Join us and make YOUR mark on the World!

Are you interested in joining some of the brightest talent in the world to strengthen the United States’ security? Come join Lawrence Livermore National Laboratory (LLNL) where our employees apply their expertise to create solutions for BIG ideas that make our world a better place.

We are dedicated to fostering a culture that values individuals, talents, partnerships, ideas, experiences, and different perspectives, recognizing their importance to the continued success of the Laboratory’s mission.

Pay Range

$117,180 - $148,608 Yearly at the SES.1 level

$140,700 - $178,392 Yearly at the SES.2 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.

We have an opening for a HPC Software Developer to support a variety of software development assignments. You will work in an environment that focuses on problems of interest to LLNL and Department of Energy (DOE) programs as a member of a dynamic, multidisciplinary team environment. You will apply fundamental knowledge of HPC software development and contribute to technical projects using creativity and imagination. This position will be in support of the Weapon Simulation and Computing (WSC) Computational Physics Program. The position will be in the ASQ division within the Computing Directorate.

This position will be filled at either the SES.1 or SES.2 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.

A hybrid schedule may be considered and is subject to change and determined by the needs of the project. You may be asked to be onsite more frequently in some circumstances.

You Will:

• Employ fundamental software engineering methods using industry standard software development practices and modern programming languages and operating systems.
• Develop a range of applications including scientific, graphical user interface, database, and visualization applications.
• Participate in the requirements definition, analysis, design, implementation, debugging, testing, and optimization of computer programs on HPC platforms.
• Participate in the development and maintenance of user documentation.
• Contribute to the fulfillment of technical projects and organizational objectives functioning as an effective team member on multi-disciplinary teams.
• Engage other developers and stakeholders frequently to share relevant knowledge, opinions, and recommendations.
• Perform other duties as assigned.

Additional job responsibilities at the SES.2 Level

• Design, implement, deploy, and maintain software systems using object-oriented analysis, design, and programming techniques.
• Manage multiple parallel tasks and priorities of customers and stakeholders, ensuring deadlines are met, while leveraging team member’s skills.
• Provide solutions to moderately complex problems that require analysis of largely identifiable factors.

• Ability to obtain and maintain a U.S. DOE Q-level security clearance which requires U.S. Citizenship.
• Bachelor’s degree in Computer Science, Computer Engineering, or related field, or the equivalent combination of education and related experience.
• Proficiency in object-oriented programming with high-level languages such as C++ and interpreted languages such as Python.
• Experience developing software with either Python or C++ within Linux and/or Windows environments.
• Experience with source code control systems, such as Git.
• Familiar with developing HPC software including distributed memory computing with MPI and on-node parallelism for CPUs and GPUs.
• Experience providing innovative approaches and applying new technologies to broadly defined tasks and projects.
• Experience approaching difficult problems with enthusiasm and creativity.
• Effective interpersonal, verbal, and written communication skills necessary to collaborate in a technical team environment and, document technical information.

Additional Qualifications at the SES.2 Level

• Knowledge and broad experience designing, implementing, deploying, and maintaining software systems using object-oriented analysis, design, and programming techniques.
• Ability to work effectively with minimal guidance and experience providing innovative approaches, applying new technologies to broadly defined tasks and projects with broad experience applying effective analytical and problem-solving skills for complex problems.
• Proficient interpersonal, verbal, and written communication skills necessary to effectively collaborate in a technical team environment to present, explain and provide advice to management.

Qualifications We Desire 

• Master’s degree in Computer Science, Computer Engineering, or a related field.
• Knowledge and experience with LLNL process and procedures.
• Experience with OpenMP, parallel programming, GPU programming, containers, continuous integration

Position Information

This is a Career Indefinite position, open to Lab employees and external candidates.

Why Lawrence Livermore National Laboratory?

• Included in 2025 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.