Job description

Looking for an opportunity to make an impact? At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers’ success. We empower our teams, contribute to our communities, and operate sustainable. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business. Your greatest work is ahead! Leidos’ Defense Systems Kinetics Business Area is seeking a Sr Software Developer to join our team. In this position, the candidate will be expected to apply domain knowledge to integrated digital engineering for conceptual system development providing operational analysis and military utility assessments for our nation’s defense. We are looking for an experienced C and Python Developer with 8 years of experience in a similar position. You will be responsible for designing and implementing high-performance, scalable software solutions using C , and delivering robust applications while working closely with our team of developers and engineers. Job Responsibilities: Design, develop, and manage high-performance software applications using C Design, develop, and manage software applications and transformations using Python Implement and optimize code for performance, security, and memory efficiency Write robust, efficient, and scalable C code for various applications, including real-time systems, embedded systems, and desktop software Monitor and optimize the performance and responsiveness of C applications across multiple platforms and environments Integrate third-party libraries, tools, and APIs into C applications for enhanced functionality Collaborate with developers, engineers, and stakeholders to ensure seamless integration of C applications with other systems and components Run unit, integration, and performance tests to ensure the stability and functionality of C applications Conduct code reviews and ensure adherence to coding standards, security protocols, and best practices in C development Participate in agile development processes and contribute to continuous improvement of C development workflows Required Skills: 8 years of related work experience with software development using C and Python Proficiency in object-oriented programming, data structures, and algorithms with C Strong understanding of memory management, multithreading, and concurrency in C applications Experience with integrating C applications with back-end technologies or third-party libraries Familiarity with C standards (C 11/14/17/20) and STL (Standard Template Library) Understanding of version control systems such as GIT Knowledge of performance optimization, profiling, and debugging tools for C is a plus Experience with security best practices in C development is preferred Excellent communication and collaboration skills, with a proven track record of effective teamwork Strong analytical and problem-solving skills, dedicated to delivering high-quality, efficient software solutions Ability to travel on an as needed basis Requires a Bachelors degree in Computer Science, Engineering, or similar discipline and 8 years’ experience, or a Master’s degree in Computer Science, Engineering, or similar discipline and 6 years’ experience. In lieu of degree, a High School diploma is acceptable with 12 years minimum experience. Active Secret Clearance If you re looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We re not hiring followers. We re recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We re already at step 30 — and moving faster than anyone else dares. Original Posting: September 11, 2026 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 $107,900.00 - $195,050.00 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.

Requirements

Must-haves

Looking for an opportunity to make an impact?
Your greatest work is ahead!
Design, develop, and manage high-performance software applications using C
Design, develop, and manage software applications and transformations using Python
Implement and optimize code for performance, security, and memory efficiency
Write robust, efficient, and scalable C code for various applications, including real-time systems, embedded systems, and desktop software
Monitor and optimize the performance and responsiveness of C applications across multiple platforms and environments
Integrate third-party libraries, tools, and APIs into C applications for enhanced functionality
Collaborate with developers, engineers, and stakeholders to ensure seamless integration of C applications with other systems and components
Run unit, integration, and performance tests to ensure the stability and functionality of C applications
Conduct code reviews and ensure adherence to coding standards, security protocols, and best practices in C development
Participate in agile development processes and contribute to continuous improvement of C development workflows
8 years of related work experience with software development using C and Python
Proficiency in object-oriented programming, data structures, and algorithms with C
Strong understanding of memory management, multithreading, and concurrency in C applications
Experience with integrating C applications with back-end technologies or third-party libraries
Familiarity with C standards (C 11/14/17/20) and STL (Standard Template Library)
Understanding of version control systems such as GIT
Excellent communication and collaboration skills, with a proven track record of effective teamwork
Strong analytical and problem-solving skills, dedicated to delivering high-quality, efficient software solutions
Ability to travel on an as needed basis
Active Secret Clearance

Nice-to-haves

Knowledge of performance optimization, profiling, and debugging tools for C is a plus
Experience with security best practices in C development is preferred

Application prep

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Keywords to mirror

pythonagile

Platform: workday
Effort: long

Benefits

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