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Apex Systems · 2 days ago

Applications Dev & Test - Software Design Engineer 3

Redmond, WA

Full-time

Onsite

Senior Level

$54/hr - $59/hr

5+ years exp

Apex Systems is a world-class IT services company that serves thousands of clients across the globe. They are seeking a Software Design Engineer 3 to analyze and modernize complex legacy implementations, write clean systems-level code in C/C++, and conduct unit testing and post-implementation validation.

Human ResourcesInformation TechnologyRecruiting

H1B Sponsor Likely

Responsibilities

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

Qualification

C/C++ DevelopmentOperating Systems AnalysisWindows OS DevelopmentDebugging Legacy CodeData Structures & Algorithms

Required

C/C++ Development: 3+ years writing systems-level code

Operating Systems & Performance Analysis: 2+ years experience

Windows OS Development: 1+ year hands-on experience

Education: Bachelor's degree in Computer Science, Computer Engineering, or related field

Experience: 5+ years in systems software development

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

Preferred

Deep OS-level engineering experience

Proven ability to modernize legacy systems and APIs

Strong debugging and performance analysis skills

Benefits

Medical

Dental

Vision

Life

Disability

Other insurance plans

ESPP (employee stock purchase program)

401K program

HSA (Health Savings Account on the HDHP plan)

SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions

Corporate discount savings program

Discounts

On-demand training program

Access to certification prep

Library of technical and leadership courses/books/seminars

Certification discounts

Other perks to associations that include CompTIA and IIBA

Dedicated customer service team for our Consultants

Certified Career Coach

Company

Apex Systems

Glassdoor3.8

Apex Systems, a division of On Assignment, provides organizations with IT staffing solutions to address gaps in their current workforce.

Founded in 1995

Richmond, Virginia, USA

1001-5000 employees

https://www.apexsystems.com

H1B Sponsorship

Apex Systems has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)

Distribution of Different Job Fields Receiving Sponsorship

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Trends of Total Sponsorships

2025 (28)

2024 (21)

2023 (35)

2022 (26)

2021 (29)

2020 (38)