Applications Dev & Test - Software Design Engineer 3

Job#: 3017824

Job Description:
Job Title: Software Design Engineer 3

Start Date: 01/26/2026

Duration: ~5 months

Location: Onsite (Redmond, WA area - confirmation pending)

Pay Rate Range: $60-$65
Top 3 Must-Have Skills

• C++ programming - 3+ years
• Windows device driver development - 3+ years
• Advanced debugging on Windows - 4+ years

Role Overview

This team manages Windows audio system certification tests for industry partners (IHVs and OEMs) to ensure compatibility with Windows and improve test content and debugging tools. The role supports ongoing Windows 11 releases and certification efforts for audio hardware and device drivers.
Responsibilities

• Design, develop, implement, test, and maintain business and computer applications software or specialized utility programs.
• Fine-tune and improve sophisticated software implementation projects.
• Gather and analyze system requirements, document specifications, and develop software solutions.
• Analyze enhancement requests and specifications.
• Implement system software and customize client requirements.
• Prepare detailed software specifications and test plans.
• Code new programs and create test data for testing.
• Modify existing programs to new standards and conduct unit testing.
• Create migration packages for system and user testing.
• Provide quality assurance reviews and post-implementation validation.
• Troubleshoot and resolve bugs found during testing.

Typical Day

• Work on certification tests for Windows audio systems.
• Debug and improve test content and tools.
• Collaborate with internal teams and external partners on Windows 11 audio compatibility.

Candidate Profile

• Ideal Candidate: Advanced debugging experience on Windows, strong C++ skills, and experience with audio or media technologies.
• Disqualifiers: Lack of required degree or strong C++ and debugging experience.

Required Qualifications

• Bachelor's degree in Computer Science or related field.
• 5+ years of experience in software engineering.
• Strong foundation in computer science (data structures, algorithms, software design).
• Large systems software design and development experience.
• In-depth troubleshooting and unit testing experience.
• Programming experience with problem diagnosis and resolution.
• 3+ years of C++ programming experience.

Preferred Qualifications

• Experience with audio or media technologies.
• Windows device driver development experience.
• Advanced debugging skills on Windows.

EEO Employer

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. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Employee Services Department at or .

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 for more details.

Apex Benefits Overview: Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our 'Welcome Packet' as well, which an Apex team member can provide.