Applications Dev & Test - Software Design Engineer 3 - ...

Job#: 3017687Job Description:Software Design Engineer- Start Date: 1/20/2026- End Date: 6/30/2026- Duration: ~5 months- Chance for Extension: Yes- Location: Onsite - Redmond, WA- Openings: 1- Pay Range: $54--$59/hrTop Must-Have Hard Skills- C/C++ Development: 3+ years writing systems-level code.- Operating Systems & Performance Analysis: 2+ years experience.- Windows OS Development: 1+ year hands-on experience.Ideal Candidate Profile- Education: Bachelor's degree in Computer Science, Computer Engineering, or related field.- Experience: 5+ years in systems software development.- Core Competencies: - Strong foundation in data structures, algorithms, and software design. - Large-scale systems software design and troubleshooting. - Debugging legacy code using Windows Debugger, instrumentation, WPP/ETW trace analysis. - Ability to modernize legacy APIs and implement new designs. - Sufficient proficiency in reading/writing code.Typical Day- 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.Ideal Candidate- - Deep OS-level engineering experience. - Proven ability to modernize legacy systems and APIs. - Strong debugging and performance analysis skills.u00a0u00a0EEO EmployerApex 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. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.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 Staffingu00ae in Talent Satisfaction in the United States and Great Place to Worku00ae in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click

Created: 2026-01-15