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Senior Software Development Engineer In Test Jobs in Arlington, WA

... in the overall shared codebase. Stays up-to-date with current development tools, processes, and ... Option 2: 5 years' experience in software engineering or related area. Preferred Qualifications.

In addition, you will provide direct on-going support and continued development for a variety of ... test operations for our growing world-wide user base. Our infrastructure consists of both cloud ...

Software Design Engineer

Everett, WA · On-site

$125 - $150/hr

In addition, you will provide direct on-going support and continued development for a variety of ... test operations for our growing world-wide user base. Our infrastructure consists of both cloud ...

New

ECU Test Engineer

Mount Vernon, WA · On-site

$80K - $120K/yr

Job Summary The Hardware-in-the-Loop (HIL) Test Engineer will be responsible for validating PACCAR Electronics-developed ECU software through HIL testing. This role partners closely with product ...

ECU Test Engineer

Mount Vernon, WA · On-site

$80K - $120K/yr

Job Summary The Hardware-in-the-Loop (HIL) Test Engineer will be responsible for validating PACCAR Electronics-developed ECU software through HIL testing. This role partners closely with product ...

ECU Test Engineer

Mount Vernon, WA · On-site

$100 - $125/hr

Job Summary The Hardware-in-the-Loop (HIL) Test Engineer will be responsible for validating PACCAR Electronics-developed ECU software through HIL testing. This role partners closely with product ...

In addition, you will provide direct on-going support and continued development for a variety of ... test operations for our growing world-wide user base. Our infrastructure consists of both cloud ...

ECU Test Engineer

Mount Vernon, WA · On-site

$80K - $120K/yr

Job Summary The Hardware-in-the-Loop (HIL) Test Engineer will be responsible for validating PACCAR Electronics-developed ECU software through HIL testing. This role partners closely with product ...

Development Engineer III

Mukilteo, WA · On-site

$110K - $140K/yr

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

Based in the beautiful Pacific Northwest, magniX builds solutions for the electric age, applying ... and software to mission-critical applications across data centers, energy storage, defense ...

Product Development Engineer

Everett, WA · On-site

$145K - $190K/yr

Based in the beautiful Pacific Northwest, magniX builds solutions for the electric age, applying ... and software to mission-critical applications across data centers, energy storage, defense ...

In addition, you will provide direct on-going support and continued development for a variety of ... test operations for our growing world-wide user base. Our infrastructure consists of both cloud ...

Showing results 21-40

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:

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.

Automation Test Cell & Facility Engineer

Mount Vernon, WA

PACCAR Inc
Motor Vehicle Manufacturing • 10K+ employees

$104K - $162K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 5 days ago


Paccar rating

8.8

Company rating: 8.8 out of 10

Based on 17 frontline employees who took The Breakroom Quiz

46th of 499 rated machine equipment manufacturers


Job description

The Automation Test Cell & Facility Engineer is responsible for the design, development, implementation, and continuous improvement of automation, controls, and testing systems in PACCAR’S Engine Test Laboratory (ETL) that support powertrain, engine, and aftertreatment development programs. This role supplies and enhances testing tools, test cell infrastructure, automation systems to validate new hardware and software technologies. The engineer works closely with cross-functional teams to improve test quality, increase automation and standardize testing procedures at ETL.

Job Functions / Responsibilities

  • Design, develop, and implement automation and control systems for engine test cells and facility operations
  • Support PACCAR engineering organizations by supplying, improving, and maintaining testing tools used for calibrating, evaluating, and validating hardware and software systems used in test cells
  • Support calibration, evaluation, and validation activities through continuous improvement of testing tools
  • Support facility upgrades and new test cell development initiatives
  • Collaborate with engineering teams to improve test quality, automation, safety, and operational efficiency
  • Research and implement new automation, instrumentation, and testing technologies


Required Qualifications & Skills

  • B.S. in Engineering (Electrical, Computer, Mechanical), Computer Science, or related discipline 
  • Minimum 7 years work experience in automation and control systems for engine test lab facilities
  • Proficiency using AVL test cell automation systems and Siemens facility hardware
  • Basic knowledge of diesel engine and exhaust aftertreatment system operation and control systems 
  • Ability to work with all ETL staff, fostering teamwork and employee development
  • Ability to work independently and as part of a multi-disciplinary team
  • Self-motivated with the ability to manage multiple tasks
  • Excellent organizational and communication skills


Preferred Qualifications & Skills

  • MS degree in Mechanical, Electrical, Computer, Automotive, or related engineering degree
  • Test cell experience performing heavy-duty on-highway engine development  
  • Experience performing engine or exhaust aftertreatment calibration
  • Proficiency using AVL test cell automation systems and data analysis (PUMA and CONCERTO)
  • Experience using engine control software such as ATI Vision, CALTERM, dSpace

PACCAR Benefits 


As a U.S. PACCAR employee, you have a full range of benefit options including:

  • 401k with up to a 5% company match
  • Fully funded pension plan that provides monthly benefits after retirement
  • Comprehensive paid time off – minimum of 10 paid vacation days (additional days are provided with additional seniority/years of service), 12 paid holidays, and sick time 
  • Tuition reimbursement for continued education 
  • Medical, dental, and vision plans for you and your family
  • Flexible spending accounts (FSA) and health savings account (HSA)
  • Paid short-and long-term disability programs
  • Life and accidental death and dismemberment insurance
  • EAP services including wellness plans, estate planning, financial counseling and more

Additional Job Board Information

PACCAR is an Equal Opportunity Employer/Protected Veteran/Disability. At PACCAR, we value talent and promote growth and development. We carefully consider numerous compensation factors, including your education, training, or experience. Applicants and employees for this position will not be sponsored for work authorization, including, but not limited to H-1B visas, now or in the future. The salary range for the Automation Test Cell & Facility Engineer is $104,100 - $162,900 annually. Additionally, this role is eligible for a full range of benefit options listed above. This position is also eligible for a holiday gift. 

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About Paccar

Sourced by ZipRecruiter

PACCAR, Inc. is a Fortune 500 company established in 1905 and is recognized as a global leader in the commercial vehicle, financial, and customer service fields. PACCAR is a global technology leader in the design, manufacture, and customer support of high-quality light-, medium- and heavy-duty trucks under its internationally recognized brands Kenworth, Peterbilt and DAF nameplates. PACCAR designs and manufactures advanced diesel engines and provides customized financial services, information technology and truck parts related to its principal business. Your next career move is waiting at PACCAR whether you want to design the transportation technology of tomorrow, support the staff functions of a dynamic, international leader, or build our excellent products and services. Join the PACCAR team today!

Industry

Motor vehicle manufacturing

Company size

10,000+ Employees

Headquarters location

Bellevue, WA, US

Year founded

1905

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