Senior Embedded Software Engineer - Defense Systems

Elbit Systems of America, LLC; Merrimack (NH); On-site; USD 115,000 - 170,000; Full time

Job summary

Elbit Systems of America, LLC in Merrimack, NH seeks a Senior Software Engineer to design, develop, integrate, and sustain software for APS programs in a classified environment. You will contribute across the full software lifecycle, including requirements analysis, design, implementation in C/C++, and verification/validation.

The role collaborates with internal teams and external customers, supporting prototype development, lab testing, and system integration, with travel up to 15%

Qualifications

• Bachelors degree in Engineering, Computer Science, or related technical field.
• 5+ years of related experience.
• Proficient with C/C++ and Python.
• Candidate must hold or be able to obtain a SECRET security clearance.
• Experience in embedded, real-time, or hardware-adjacent software environments preferred.

Responsibilities

• Provides software engineering input to the APS product team through development, testing, and validation activities.
• Develops and maintains C/C++ applications and embedded software for new features, system upgrades, and end-of-life replacements.
• Supports interpretation and implementation of internal and external customer application requirements.
• Reviews and becomes familiar with existing codebases, including subcontractor or partner-developed modules.
• Writes high-quality, maintainable source code within established deadlines.
• Performs unit testing and integration testing prior to release.
• Troubleshoots reported issues, identifying root causes and implementing corrective actions.
• Identifies, documents, and proposes solutions for software defects.
• Contributes to development and execution of test plans, procedures, and verification reports for qualification and acceptance testing.
• Supports laboratory testing on breadboards, mock-ups, and system integration test setups.
• Creates and maintains task lists and engineering documentation.
• Assists with system integration, field testing, and system-level troubleshooting.
• Collaborates closely with systems, hardware, electrical, and test engineering disciplines.

Skills

C/C++

Python

Embedded software

Real-time systems

Defense environment

SECRET clearance

Education

Bachelor's degree in Engineering/CS

Job description

Elbit Systems of America, LLC in Merrimack, NH seeks a Senior Software Engineer to design, develop, integrate, and sustain software for APS programs in a classified environment. You will contribute across the full software lifecycle, including requirements analysis, design, implementation in C/C++, and verification/validation.

The role collaborates with internal teams and external customers, supporting prototype development, lab testing, and system integration, with travel up to 15%