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Description

Unleash your curiosity. Solve what others can’t.

At **Leidos** , we’re not just writing code—we’re decoding the unknown. Our San Diego research and engineering team tackles some of the most complex challenges in national defense using **advanced signal processing, ocean remote sensing, and high-performance computing** .

We’re looking for a **Software Engineer / Computer Scientist** who thrives on solving hard problems and pushing the boundaries of performance. You’ll join a cross-disciplinary team of scientists and engineers—experts in **hydrodynamics, physics, acoustics, and signal processing** —to build high-impact software that extracts meaning from massive, complex data sets.

If you’re driven by innovation, energized by collaboration, and ready to see your algorithms power real-world missions—you belong here.

What You’ll Do

+ Collaborate with scientists and engineers to **design, implement, and optimize advanced algorithms** that power next-generation radar, optical, and infrared sensor systems.

+ **Engineer high-performance backend systems** for scientific computing and distributed environments.

+ **Integrate, refactor, and optimize scientific codebases** , ensuring scalability and efficiency.

+ **Translate and enhance existing code for GPU/CUDA acceleration** and parallel/distributed execution.

+ Test, document, and evolve complex software in a Linux/Unix environment.

+ Work in a collaborative environment that values **technical rigor, creativity, and growth** .

Required Qualifications

+ **Bachelor’s degree** in Computer Science, Applied Mathematics, Physics, or related field with **6+ years** of backend software development experience; or **Master’s with 4+ years** . Equivalent experience may be considered in lieu of degree.

+ **U.S. citizenship** and ability to obtain a **Top Secret clearance** (active TS preferred).

+ Demonstrated expertise in **C/C++ backend software development** , including large-scale, performance-critical applications.

+ Proven experience with **high-performance computing** , **parallel/distributed processing** , and standards such as **MPI** .

+ Hands-on experience with **GPU/CUDA programming** and optimization.

+ Experience with AI/ML and LLM concepts and algorithms

+ Strong foundation in **advanced mathematics or physics** , with the ability to translate theory into functional code.

+ Proficiency in **Linux/Unix** development environments.

+ Familiarity with **scientific programming** , algorithm implementation, and system-level problem-solving.

+ Strong understanding of **software engineering principles** and best practices.

+ Excellent **written and verbal communication** and **software documentation** skills.

Preferred Qualifications

+ **Active Top Secret clearance**

+ Familiarity with **Agile development** , **object-oriented design** , and modern software architecture.

+ Experience with **Git** , **GitLab** , **MATLAB** , and **Fortran** .

+ Knowledge of **multi-threaded** or **shared-memory applications** .

Why Leidos?

You’ll be part of a team that:

+ Combines **science, technology, and imagination** to solve real-world defense challenges.

+ Values your **curiosity** as much as your technical ability.

+ Invests in your **professional growth** through mentorship and hands-on innovation.

At Leidos, your code doesn’t just run—it **defends, detects, and delivers** .

At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.”

If you’re already scheming step 20 while everyone else is still debating step 2… good. You’ll fit right in.

Original Posting:

October 21, 2025

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $85,150.00 - $153,925.00

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

REQNUMBER: R-00169124

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.