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Senior Software Development Engineer In Test Jobs in Arlington, WA

PACCAR

Senior ECU Test Engineer

Mount Vernon, WA · On-site

$104K - $162K/yr

The Senior ECU Test Engineer will be responsible for Hardware in the Loop (HiL) testing of ECUs with PACCAR Electronics developed software. The successful candidate will coordinate with the product ...

PACCAR Inc

Senior ECU Test Engineer

Mount Vernon, WA · On-site

$125 - $150/hr

PACCAR The Senior ECU Test Engineer will be responsible for Hardware in the Loop (HiL) testing of ECUs with PACCAR Electronics developed software. The successful candidate will coordinate with the ...

Helion

Senior Test Engineer

Everett, WA · On-site

$80 - $100/hr

... software integration * Work with Contract Manufacturers (CMs) to deploy, validate, and maintain ... in R&D or production environments * Proficient with standard benchtop instruments such as ...

Socket.dev

Development Engineer III

Mukilteo, WA · On-site

$100 - $125/hr

... in engineering tasks. * Performs and leads product development tests, including development and ... qualification test support. Required Qualifications * Bachelor's degree in mechanical engineering ...

Helion

Senior Software Engineer, Data Platform

Everett, WA · On-site

$135K - $178K/yr

Helion is a fusion power company based in Everett, WA, on a mission to build the world's first fusion power plant. The Senior Software Engineer, Data Platform will design, develop, and operate a ...

Helion

Senior Software Engineer, Data Platform

Everett, WA · On-site

$135K - $178K/yr

Helion is a fusion power company based in Everett, WA, focused on building the world's first fusion power plant. They are seeking a Senior Software Engineer for their Data Platform to design, develop ...

Leidos

Lead Test and Integration Engineer

Lynnwood, WA · On-site

$87K - $157K/yr

Support Development: Ensure a "design for testing" focus during system development and integration ... Bachelor's degree in Engineering (Systems, Mechanical, Electrical, Software, Ocean), Computer ...

Karman Space & Defense

Development Engineer I

Mukilteo, WA · On-site

$85K - $110K/yr

Karman Space & Defense is a leader in the rapid design, development, and production of critical ... Contributes to test planning and execution, including test design, analysis, procedure development ...

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All JobsSoftware Development Engineer In Test JobsSenior Software Development Engineer In Test JobsSenior Software Development Engineer In Test Jobs in Arlington, WA

Senior Software Development Engineer In Test information

See Arlington, WA salary details

$24.9K

$139.1K

$181.1K

How much do senior software development engineer in test jobs pay per year?

As of Sep 8, 2026, the average yearly pay for senior software development engineer in test in Arlington, WA is $139,101.00, according to ZipRecruiter salary data. Most workers in this role earn between $122,400.00 and $159,000.00 per year, depending on experience, location, and employer.

What does a senior software development engineer in test do?

A Senior Software Development Engineer in Test (SDET) is responsible for designing, developing, and maintaining automated test frameworks and tools to ensure the quality and reliability of software products. They work closely with development and QA teams to identify test requirements, create robust test cases, and integrate automated tests into the CI/CD pipeline. In addition to coding and scripting, Senior SDETs mentor junior team members, analyze test results, and help troubleshoot complex issues to continuously improve software quality. Their expertise bridges the gap between development and testing, ensuring both speed and quality in software releases.

How does a senior software development engineer in test typically collaborate with development and product teams to ensure software quality?

As a Senior Software Development Engineer In Test (SDET), you will work closely with both development and product teams throughout the software development lifecycle. This includes participating in design and requirements discussions to identify potential test cases early, contributing to test automation strategies, and providing feedback on testability and quality risks. SDETs often pair with developers to review code, co-create test plans, and triage bugs together, ensuring that testing is fully integrated into the CI/CD pipeline. Effective communication and cross-team collaboration are essential for proactively identifying issues and maintaining high software quality standards.

What are the key skills and qualifications needed to thrive as a senior software development engineer in test, and why are they important?

To thrive as a Senior Software Development Engineer In Test, you need advanced programming skills, deep knowledge of software testing methodologies, and a bachelor's degree in computer science or a related field. Expertise with automation frameworks (such as Selenium, Cypress, or Appium), CI/CD tools, and scripting languages is typically required, along with relevant certifications like ISTQB. Strong analytical thinking, problem-solving, and effective communication are crucial soft skills for collaborating with cross-functional teams and driving quality initiatives. These capabilities ensure rigorous test coverage, faster release cycles, and high-quality software products.

What is the difference between Senior Software Development Engineer In Test vs Software Development Engineer In Test?

AspectSenior Software Development Engineer In TestSoftware Development Engineer In Test
ExperienceTypically 5+ years in testing and developmentEntry to mid-level, 1-3 years experience
ResponsibilitiesDesigns complex test frameworks, mentors juniors, leads testing initiativesDevelops test cases, automates tests, executes testing tasks
Skills & CertificationsAdvanced coding, automation, testing tools, leadership skillsProgramming, automation, testing tools
Work EnvironmentCollaborates with cross-functional teams, often in Agile settingsWorks closely with developers, focuses on automation and manual testing

In summary, a Senior Software Development Engineer In Test has more experience, leadership responsibilities, and strategic testing roles compared to a Software Development Engineer In Test, who primarily focuses on developing and executing tests.

What cities near Arlington, WA are hiring for Senior Software Development Engineer In Test jobs?

Cities near Arlington, WA with the most Senior Software Development Engineer In Test job openings:

Senior Software Development Engineer In Test jobs near you
Infographic showing various Senior Software Development Engineer In Test job openings in Arlington, WA as of August 2026, with employment types broken down into 1% As Needed, 80% Full Time, 16% Part Time, and 3% Contract. Highlights an 91% Physical, 3% Hybrid, and 6% Remote job distribution, with an average salary of $139,101 per year, or $66.9 per hour.

Software Development Engineer in Test SDET

Globenet Consulting Corp

Lynnwood, WA • On-site

$40 - $45/hr

Full-time

Re-posted 19 days ago

Job description

Benefits:
  • Competitive salary
  • Opportunity for advancement
  • Training & development

Role: Software Development Engineer in Test (SDET)
Location: Plano, TX
Work Arrangement: Onsite, five days per week
Experience Required: 9+ years
Benefits and Engagement Details
  • Long-term opportunity
  • Competitive compensation
  • Opportunity to work on enterprise-scale automation and software quality initiatives
Position Overview
The AES Group Inc. is seeking an experienced Software Development Engineer in Test to design, build, and maintain scalable automation solutions across web, API, backend, and integrated application environments.
The ideal candidate will bring strong programming expertise, hands-on automation framework experience, and the ability to support continuous testing within modern CI/CD pipelines. Candidates must provide an accurate resume reflecting their experience.

Key Responsibilities
  • Design, develop, and maintain scalable automation frameworks for web, API, and backend testing.
  • Create automated test scripts using Java, Python, or C#.
  • Perform functional, regression, integration, API, UI, and end-to-end testing.
  • Build continuous testing solutions and integrate automated tests into CI/CD pipelines.
  • Review business and technical requirements to create test strategies, test cases, and automation plans.
  • Collaborate with developers, product owners, DevOps engineers, and quality assurance teams.
  • Conduct root cause analysis and troubleshoot complex application and automation issues.
  • Perform performance, cross-browser, and cross-platform testing when required.
  • Participate in code reviews and recommend improvements to automation frameworks.
  • Enhance testing standards, reusable components, reporting, and overall quality engineering practices.
Required Qualifications
  • 9+ years of experience in software testing, quality engineering, or test automation.
  • Strong programming experience with Java, Python, or C#.
  • Hands-on experience developing and maintaining automation frameworks.
  • Strong knowledge of web, API, backend, integration, and UI testing.
  • Experience integrating automated tests with CI/CD and DevOps pipelines.
  • Ability to create comprehensive test strategies, test cases, and automation plans.
  • Strong troubleshooting, analytical, and root cause analysis skills.
  • Excellent communication and cross-functional collaboration abilities.
  • Willingness to work onsite in Plano, Texas, five days per week.
Ready to make an impact? Apply now and join us on our journey!