High Performance Computing Compiler and Tool Developer

Lawrence Livermore National Laboratory
Livermore, California, (US)
Closing date
4 Jun 2023

Job Details

Company Description

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 committed to a diverse and equitable workforce with an inclusive culture that values and celebrates the diversity of our people, talents, ideas, experiences, and perspectives. This is important for continued success of the Laboratory’s mission.

Pay Range

$123,960 - $166,992 yearly for the SES.2 level

$148,650 - $200,328 yearly for the SES.3 level

Please note that the pay range information is a general guideline only. Many factors are taken into consideration when setting starting pay including education, experience, the external labor market, and internal equity.

Job Description

We have an opening for a Software Developer specializing in compilers and application development tools for supporting High Performance Computing (HPC). You will work with scientific computing teams, the open source software community, and HPC vendor partners on the development of enabling technologies for the state-of-the-art platforms currently in use and under procurement. You will apply knowledge of HPC systems and software to enhance and improve the development environment. You will be a member of Livermore Computing’s (LC) Development Environment Group, within the Computing Directorate.

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

  • Help develop and deploy new compiler technology through LLVM for use on LC systems and the open source community.
  • Help applications teams utilize and integrate LLNL developed tools and features as point person during the life cycle of their issues, from tracking to resolving.
  • Independently evaluate, analyze, implement, and benchmark performance optimizations on advanced architectures including El Capitan.
  • Provide prime technical support of Clang compilers - isolating, reporting, and fixing compiler-related bugs in HPC applications running on LC systems on multiple networks.
  • Participate in the evaluation of vendor solutions for compiler and toolchain-related topics and deploy proposed solutions on LC systems.
  • Investigate, diagnose, and resolve software issues.
  • Provide software quality assurance (SQA) to ensure a stable software computing environment.
  • Engage other developers and staff members frequently to share relevant knowledge and recommendations.
  • Perform other duties as assigned.

Additional job responsibilities, at the SES.3 level

  • Participate in the definition of programming languages and components in support of HPC application development.
  • Conduct relevant applied research to address challenges inherent in HPC computing at the level of Exascale performance.


  • Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship
  • Bachelor’s degree in Computer Science or a related field, or the equivalent combination of education and related experience.
  • Broad experience with compiler and toolchain development, including intermediate representations, machine-independent and machine-dependent optimizations, and/or code generation.
  • Comprehensive knowledge of instruction sets and computer architectures, such as pipeline structure and hazards, and cache and memory hierarchies.
  • Experience with and knowledge of UNIX/Linux, compiled programming languages, and script programming languages (Python, shell).
  • Experience working with, and contributing to, open-source programming projects.
  • Broad experience with structured software engineering and/or SQA practices.
  • Effective analytical and problem-solving skills to contribute to creative solutions to moderately complex problems, in an multi-disciplinary environment with conflicting priorities.
  • Proficient verbal and written communication skills to effectively collaborate in a team environment, present and explain technical information to technical as well non-technical audience.

Additional qualifications at the SES.3 level

  • Advanced knowledge and significant experience with compiler and/or toolchain development.
  • Advanced knowledge and experience with the development of programming models and/or new programming language standards.
  • Ability to provide innovative solutions to broadly defined tasks and problems.
  • Significant and current experience using HPC systems and tools, as well as advanced knowledge of node-level and distributed parallel programming models and/or techniques.

Qualifications We Desire

  • M.S. or PhD in Computer Science, or related field.
  • Current and in-depth experience using HPC systems and tools, and knowledge of node-level and distributed parallel programming models and techniques, including familiarity with GPGPU programming, OpenMP, CUDA, or ROCm.
  • Advanced knowledge and experience in the development of programming models, new language standards and their runtimes (e.g., OpenMP runtime libraries).

Additional Information

All your information will be kept confidential according to EEO guidelines.

Position Information

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

Why Lawrence Livermore National Laboratory?

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.

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.

We invite you to review the Equal Employment Opportunity posters which include EEO is the Law and Pay Transparency Nondiscrimination Provision.

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.


Lawrence Livermore National Laboratory (LLNL) is the go-to laboratory for science and technology solutions to the toughest and most important problems affecting national and global security. If you are interested in contributing to pushing the frontiers of knowledge to build the scientific and technological foundation that will be needed to address national security issues, then we invite you to apply.

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