Software Engineer
Company: Leidos
Location: El Cajon
Posted on: October 28, 2025
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Job Description:
Job Description 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 only and 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.
Keywords: Leidos, El Cajon , Software Engineer, Engineering , El Cajon, California
