Applications Dev & Test - Software Design Engineer 3

## Job Description# Applications Dev & Test - Software Design Engineer 3* **C/C++ development:** 5+ years* **Operating systems knowledge (Windows):** 3+ years* **Networking protocols (IPSec, VPN technologies, QUIC):** 2+ years* Strong experience in C/C++ systems-level development.* Familiarity with networking protocols such as IPSec, TCP, and QUIC.* Comfortable with VPN technologies and software-defined networking.* Expertise in PowerShell and YAML scripting.* Experience working in both Windows and Linux environments.* Skilled in debugging tools such as Wireshark, gdb, tcpdump, and system-level instrumentation.* Fine-tune and improve complex software implementation projects.* Gather and analyze system requirements, document specifications, and develop solutions.* Customize system software to meet client requirements.* Prepare detailed design and test documentation.* Implement new or modify existing programs and author automated tests.* Perform post-implementation validation and resolve bugs.* Ability to write clean, maintainable systems-level code in C/C++.* Strong debugging skills for legacy software using instrumentation and tracing tools.* Experience analyzing WPP/ETW traces for complex system issues.* Skilled in developing and enhancing automated test suites.* Familiarity with VPN, IPSec-based security, and SDN technologies.* Bachelor’s degree in Computer Science, Computer Engineering, or related field.* 5+ years of experience in software design and development.* Strong foundation in data structures, algorithms, and software design principles.* Experience with large-scale systems software development.* Proficiency in troubleshooting and unit testing for both new and legacy systems.* Sufficient proficiency in reading and writing code.* Systems-level programming in C and C++.* Operating systems knowledge (Windows and Linux).* Debugging tools: Windows Debugger, Wireshark, gdb, tcpdump.* Experience with WPP/ETW trace analysis.* Networking protocols: IPSec, TCP, QUIC.* VPN and SDN technologies.* PowerShell and YAML scripting.*Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click*

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