Applications Dev & Test – Software Design Engineer

Job Title

Software Design Engineer 4

• Start Date: 1/20/2026
• End Date: 6/30/2026
• Duration: ~5 months
• Location: Onsite – Redmond, WA
• Openings: 1
• Pay Range: $73-$78/hr

• Operating Systems Knowledge (Windows preferred): 3+ years
• C/C++ Development: 3+ years
• Kernel Driver API Familiarity: Ability to rapidly gain understanding

• Education: Bachelor’s degree in Computer Science, Computer Engineering, or related field.
• Experience: 5+ years in systems‑level engineering and software development.
• Core Competencies:
• Strong foundation in data structures, algorithms, and software design.
• Large‑scale systems software design and troubleshooting.
• Hands‑on experience writing systems‑level code in C and C++.
• Proficiency with debugging tools and techniques, including Windows Debugger, instrumentation‑based analysis, and WPP/ETW trace collection.
• Ability to modernize legacy APIs and implement new designs.
• Sufficient proficiency in reading/writing code.

• Analyze and modernize complex legacy implementations.
• Write clean, maintainable systems‑level code in C/C++.
• Debug and fix issues using advanced OS‑level tools.
• Prepare detailed specifications, test plans, and migration packages.
• Conduct unit testing and post‑implementation validation.

• Deep OS‑level engineering experience with Windows.
• Strong debugging and performance analysis skills.
• Proven ability to modernize legacy systems and APIs.

Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law.

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