> Markdown version of [/jobs/ext/3137900-software-engineer-sr-e3](https://www.wearedevelopers.com/jobs/ext/3137900-software-engineer-sr-e3). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer Sr - E3 - **Company:** Lockheed Martin - **Location:** Owego, NY, United States - **Experience:** Expert - **Salary:** $98,100.0 - $182,100.0 - **Contract:** Permanent contract - **Skills:** Agile Methodology, Confluence, JIRA, Automation of Tests, Unit Testing, C++ (Programming Language), Configuration Management, Communications Protocols, Computer Engineering, Continuous Integration, Software Debugging, Device Drivers, Microprocessors, Linux on Embedded Systems, Embedded Software, Ethernet, Firmware, Field-Programmable Gate Array (FPGA), Hardware Design, Hypervisor, Modular Design, PCI Express, Real-Time Operating Systems, Regression Testing, Software Engineering, System Programming, Systems Integration, Universal Asynchronous Receiver/Transmitter, VxWorks, Serial Peripheral Interface, PIC Microcontroller, Test-Driven Development (TDD), Safety Critical Systems, Git, SC Clearance, Information Technology, DO-178B, U-Boot, Devsecops - **Published:** September 29, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9199596/software-engineer-sr-e3 ## About the Role You're a software engineer who enjoys solving complex problems and working across engineering disciplines. You can independently tackle significant technical challenges, communicate effectively, and apply sound engineering judgment. Experience with embedded software, C/C++, RTOS, hypervisors, hardware/software integration, or safety-critical systems is highly valued., * Bachelor's degree or above from an accredited college in a STEM discipline (Computer Science, Computer Engineering, Software Engineering, or related technical field); with 5 years of related professional experience or 3+ years related experience required with a related Masters degree * Professional embedded software development experience in C and/or C++. * Familiar with developing and debugging software that controls embedded hardware, firmware, and FPGAs. Knowledge of hardware communication protocols such as PCIe, SPI, UART, and I2C * Experience developing, integrating, and debugging software within a Real-Time Operating System (RTOS) or embedded Linux environment (e.g., Wind River VxWorks, LynxOS, Green Hills Integrity, or similar). * Experience working with hardware/software interfaces (microcontrollers, microprocessors, FPGAs, or custom hardware). * Willingness and ability to work onsite in Owego, NY, including working within closed/classified lab facilities. * Ability to obtain and maintain a U.S. Government security clearance at the Secret level. * Must be a US Citizen; this position will require a DoD government security clearance at the Secret level. This position is located at a facility that requires special access Desired Skills * Experience with Secure Processing concepts, cryptography, secure boot, or hypervisor technologies (e.g., LynxSecure). * Experience developing low-level software, device drivers, and Board Support Packages (BSPs). * Familiarity with open architecture initiatives and modular design standards (e.g., FACE, OMS, SOSA). * Knowledge of hardware communication protocols (e.g., PCIe, Ethernet, SPI, UART, I2C, ARINC-429). * Hands-on experience working in lab environments with test instrumentation (logic analyzers, oscilloscopes, serial consoles). * Experience using Agile software development tools and methodologies (e.g., Git, Jira, Confluence, CI/CD). * Experience with Test-Driven Development (TDD), unit testing frameworks (e.g., VectorCAST), and automated regression test benches. * Familiarity with safety-critical software development processes (e.g., DO-178C). * Experience mentoring junior engineers or leading small technical efforts. * Active U.S. Secret clearance. ## Description As a Level 3 Senior Software Engineer, you'll work across the software development lifecycle, taking ownership of complex technical assignments and developing solutions that move from design into real mission systems. You'll collaborate with software, systems, hardware, cyber, and test engineers in a hands-on environment., * Design, develop, test, debug, document, and integrate embedded software for avionics, mission computers, and secure processing systems. * Develop software for RTOS and hypervisors such as LynxOS, VxWorks, Green Hills Integrity, or LynxSecure. * Perform hands-on software/hardware integration, verification, troubleshooting, and system-level debugging using target hardware and laboratory instrumentation. * Analyze and resolve complex issues involving processors, FPGAs, peripherals, and hardware/software interfaces. * Apply software engineering standards, development processes, configuration management, and coding best practices. * Support modern DevSecOps practices, including CI/CD and automated testing. * Participate in peer reviews and technical design discussions. * Provide technical guidance and mentorship to junior engineers. ## Related Videos - [More efficient software for more efficient microchips](https://www.wearedevelopers.com/videos/1164-more-efficient-software-for-more-efficient-microchips) - [GitOps for the people](https://www.wearedevelopers.com/videos/461-gitops-for-the-people) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Is Software Engineering Hard?](https://www.wearedevelopers.com/magazine/448-is-software-engineering-hard) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Best Countries for Software Engineers](https://www.wearedevelopers.com/magazine/267-best-countries-for-software-engineers) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs) - [What is Software Engineering?](https://www.wearedevelopers.com/magazine/289-what-is-software-engineering)