Software Engineer C++

Leidos LLC; Tewksbury (MA); On-site; USD 87,000 - 157,000; Full time

Job summary

Leidos is seeking a Software Engineer to support new product development at Security Enterprise Solutions. You will design, develop, and troubleshoot multi-tier distributed applications in C++ on Linux, focusing on real-time performance and OO design, collaborating with cross-functional scientists and engineers.

You will contribute through the software lifecycle from requirements to validation, participate in software development processes, and may travel to customer sites.

Qualifications

• Bachelor's degree with 4-8 years of relevant experience or Master's degree with 2-6 years of relevant experience.
• Proficient in C++ and OOAD, memory management, and distributed systems design.
• Experience with TCP/UDP socket programming and Linux-based development.

Responsibilities

• Design, build, and maintain efficient C++ code for distributed systems.
• Analyze customer issues, identify bottlenecks, and implement robust fixes.
• Collaborate within a software development process and support cross-functional teams.

Skills

C++

OOP/OOAD

Socket programming (TCP/UDP)

Data structures & algorithms

Linux

Education

Bachelor's degree

Master's degree

Tools

Qt 5+

CUDA

OpenGL

Linux (RedHat)

Job description

Leidos is looking for a talented Software Engineer to support new product development at Security Enterprise Solutions. As a Software Engineer on our diverse and collaborative team, you will work alongside our expert Scientists and Engineers who belong to cross functional discipline, contributing to Leidos products with global impact on aviation security screening. You’ll be honing your engineering skills with instrumentation domain products, real-time programming, and object-oriented design, all with the support of a management team focused on your professional growth and advancement. Working under general supervision in a diverse team, your primary responsibility will be to develop, modify and troubleshoot multi-tiered distributed applications and systems. The duties and responsibilities may change from time to time without notice and include but are not limited to the duties described below.

Primary Responsibilities

Design, build, and maintain efficient, reusable, and reliable C++ code using good OOP/OOAD techniques for our systems. Optimize, identify bottlenecks, bugs, and devise solutions to problems including: Maintain code quality, leverage and extend code, revision control and organization Analyze customer issues and identify and implement solutions. Participate and contribute within a defined software development process. Occasional travel to customer sites may be required. Travel may be domestic and international.

Basic Qualifications

Software Engineering candidate shall participate in the design, development, testing, troubleshooting, and debugging of software programs for enhancements and new software-intensive systems and products. Applies appropriate principles, standards, processes, procedures, and tools throughout the software development life cycle. Duties include software requirements analysis, analysis of hardware compatibility, development of software products and tools used for design, development and maintenance of infrastructure, and platforms. Typical Education & Experience: Develops solutions to complex technical issues and problems that impact multiple area or disciplines. Regularly employs ingenuity and creativity to develop new technical solutions and systems to achieve functional objectives. Communicates with internal team members across multiple areas and client team members. Works to influence project/team leaders regarding solution design, process and/or approaches. Requires expert knowledge of and ability to apply advanced technical principles, theories, and concepts. Bachelor's degree with 4-8 years of relevant experience, or Master's degree with 2-6 years of relevant experience. Working knowledge of C++ and OOP/OOAD Understanding of data structures, algorithms, and software design solutions. Understanding of memory management, multicore processors, and distributed systems design. Experience with TCP/UDP socket programming.

Preferred Qualifications

Preferred Qualifications: Graphics Design, GUI development Experience writing/debugging socket programming. Interfacing with hardware and real-time debugging. Experience developing software with Linux based OS (RedHat distribution preferred) and Qt 5 or above programming language. GPU Programming with CUDA and/or OpenGL. Good working knowledge of SQL. Working knowledge of Cybersecurity. Working knowledge of networking solutions. Working knowledge of DevOps and CI/CD pipeline. Experience with Scrum/Agile development methodologies. 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 that 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 24, 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 $87,100.00 - $157,450.00 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.

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers.

Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.