Senior Principal Software Engineer

Sandia National Laboratories
Albuquerque, New Mexico, United StatesFull-time$102,400–$199,700Posted Sep 14, 2026

About the role

About Sandia

Sandia National Laboratories is the nation’s premier science and engineering lab for national security and technology innovation, with teams of specialists focused on cutting-edge work in a broad array of areas. Some of the main reasons we love our jobs:

Challenging work with amazing impact that contributes to security, peace, and freedom worldwide

Extraordinary co-workers

Some of the best tools, equipment, and research facilities in the world

Career advancement and enrichment opportunities

Flexible work arrangements for many positions include 9/80 (work 80 hours every two weeks, with every other Friday off) and 4/10 (work 4 ten-hour days each week) compressed workweeks, part-time work, and telecommuting (a mix of onsite work and working from home)

Generous vacation, strong medical and other benefits, competitive 401k, learning opportunities, relocation assistance and amenities aimed at creating a solid work/life balance*

World-changing technologies. Life-changing careers. Learn more about Sandia at: http://www.sandia.gov

These benefits vary by job classification.

What Your Job Will Be Like

We are seeking a highly motivated Software Systems Engineer to serve as a developer for a multidisciplinary team focused on delivering high-impact national security systems. The successful candidate will design, develop and implement systems in the areas of mission algorithm and software architectures. They will develop solutions to complex problems that require the frequent use of creativity, analysis, and out of the box thinking to solve some of our nation's most critical software needs. The successful candidate will initially focus on the development of the 7th generation United States Nuclear Detonation Detection System (USNDS).

On any given day, you may be called on to:

Develop and document solutions for high-consequence satellite ground systems using C++, Java, Python, Bash, C

Learn and support existing software and hardware systems

Work on an Agile team developing software systems addressing exciting remote sensing problems, including the capture, processing, exploitation, visualization, and distribution of real-time satellite sensor data

Collaborate with architects, developers, technical leads, customers, and end users to collect requirements, design solutions, and deliver extensible software applications

Analyze existing systems and develop new solutions that push the state of what is possible

Use debugging tools, static analysis tools, test harnesses, and other capabilities to address sophisticated software applications and libraries

Engage with diverse specialists in areas such as data fusion, analytics, cloud computing, machine learning, modeling and simulation, service architectures, data management and visualization, and pattern recognition

Because of the nature of this position, candidates must be able to work onsite at our main facility in Albuquerque, NM

Salary Range

$102,400 - $199,700

Salary range is estimated, and actual salary will be determined after consideration of the selected candidate's experience and qualifications, and application of any approved geographic salary differential.

Qualifications We Require

Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, Mathematics, Statistics, or a relevant STEM field

Five (5) years of experience with software engineering and computer science on high consequence information systems

Four (4) years of experience with object-oriented software development C++, Python

One (1) year of experience with algorithm development

An Active DOE Q Clearance or DOD equivalent

Qualifications We Desire

Experience with the full software development process using Agile or Iterative methodologies

Experience using a subset of the following: system engineering, hardware and software architecture, distributed system design, data exploitation/mining/fusion algorithms, digital signal processing, image processing, optical systems, command and control systems, numerical analysis, modeling and simulation, relational/object/geographic database technologies, user interfaces, scientific data visualization, web service technologies, and multi-core/GPU/parallel computing

Proficiency in a subset of the following: requirements capture, software modeling using UML, systems-level software testing, high consequence anomaly resolution, documentation and training, information assurance, and deployment of delivered systems

Experience using CI/CD tools such as Maven, Gradle, Jenkins, GitLab, GitHub, or Docker.

Proven presentation and communication skills

Desire and ability to grow technical capabilities, programs, and staff

Evidence for and a desire to lead in any capacity (technical direction, project leader, program leader, mentor, educator, etc.)

Ability to obtain SCI clearance, which may require polygraph testing

About Our Team

The System and Software Engineering Solutions Department is a capability-based organization that architects, develops, integrates, tests, and deploys highly reliable mission critical systems using agile methodologies. We have expertise in R&D and Information Technology across many disciplines including large-scale software engineering, computer science, cyber security, and computer engineering. Our specific capabilities include classical software development, platform automation, software architectures, and cyber security. We leverage these capabilities to innovate high-rigor solutions while supporting existing critical customer needs. Our current responsibility includes support for nonproliferation and national security missions for the US Nuclear Detonation Detection System.

Posting Duration

This posting will be open for application submissions for a minimum of three (3) calendar days, including the 'posting date'. Sandia reserves the right to extend the posting date at any time.

Security Clearance

Position requires a Department of Energy (DOE) Q security clearance to start, or equivalent active security clearance with another U.S. government agency (e.g., DOD). Sandia is required by DOE directive to conduct a pre-employment drug test and background review that includes checks of personal references, credit, law enforcement records, and employment/education verifications. Applicants for employment need to be able to maintain a DOE Q-level security clearance, which requires U.S. citizenship. If you hold more than one citizenship (i.e., of the U.S. and another country), your ability to obtain a security clearance may be impacted.

Applicants offered employment with Sandia are subject to a federal background investigation to meet the requirements for access to classified information or matter if the duties of the position require a DOE security clearance. Substance abuse or illegal drug use, falsification of information, criminal activity, serious misconduct or other indicators of untrustworthiness can cause a clearance to be denied or terminated by DOE, resulting in the inability to perform the duties assigned and subsequent termination of employment.

Eeo

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status and any other protected class under state or federal law.

NNSA Requirements For MedPEDs

If you have a Medical Portable Electronic Device (MedPED), such as a pacemaker, defibrillator, drug-releasing pump, hearing aids, or diagnostic equipment and other equipment for measuring, monitoring, and recording body functions such as heartbeat and brain waves, if employed by Sandia National Laboratories you may be required to comply with NNSA security requirements for MedPEDs.

If you have a MedPED and you are selected for an on-site interview at Sandia National Laboratories, there may be additional steps necessary to ensure compliance with NNSA security requirements prior to the interview date.

Job ID: 699058

Job Family: IT

Regular/Temporary Position: R

Full/Part-Time Status: F

Responsibilities

  • Develop and document solutions for high-consequence satellite ground systems using C++, Java, Python, Bash, C
  • Learn and support existing software and hardware systems
  • Work on an Agile team developing software systems addressing remote sensing problems
  • Collaborate with architects, developers, technical leads, customers, and end users
  • Analyze existing systems and develop new solutions
  • Use debugging tools, static analysis tools, test harnesses, and other capabilities

Qualifications

  • Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, Mathematics, Statistics, or a relevant STEM field
  • Five years of experience with software engineering and computer science on high consequence information systems
  • Four years of experience with object-oriented software development C++, Python
  • One year of experience with algorithm development
  • An Active DOE Q Clearance or DOD equivalent

Benefits

  • Generous vacation
  • Strong medical and other benefits
  • Competitive 401k
  • Learning opportunities
  • Relocation assistance
  • Flexible work arrangements

Skills mentioned

C++PythonSystem DesignDistributed SystemsDebuggingSoftware TestingCI/CDDockerGitShell Scripting

About Sandia National Laboratories

Sandia National Laboratories is the nation’s premier DOE science and engineering lab for national security and technology innovation. Our team of scientists, engineers, researchers, and business specialists apply their knowledge and skill toward delivering cutting-edge technology in an array of areas. Across our main sites in Albuquerque, NM, and Livermore, CA, our research ranges from nuclear defense and homeland and global security to innovative work in biotechnology, environmental preservation, energy, and cyber security. Our teams have shared some of the reasons they enjoy working at Sandia: • Challenging work with amazing impact that contributes to security, peace, and freedom worldwide • Extraordinary co-workers • Access to some of the best tools, equipment, and research facilities in the world (tours.sandia.gov) • Career advancement and enrichment opportunities • Work-life balance with flexible work schedules, competitive benefits, and convenient on-site amenities

Defense and Space Manufacturing10,001+ employeesAlbuquerque, NM