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Senior Software Development Engineer In Test Jobs in Arlington, WA

Pennant Solutions Group

Sr Aerospace Engineer

Mukilteo, WA · On-site

$175K - $190K/yr

... design, development, and validation of aerospace systems. This role is responsible for leading ... This individual plays a key role in test planning, technical documentation, and solving complex ...

Fortive

Service Test Engineer

Everett, WA

... development, and execution of the assembly, installation, testing, operation, maintenance, and ... Our forward-looking companies lead the way in software-powered workflow solutions, data-driven ...

Fortive

Service Test Engineer

Everett, WA · On-site

... software tools. * Working well in team or independent environments, and the ability to take on ... development, and execution of the assembly, installation, testing, operation, maintenance, and ...

Helion Energy

Senior Test Engineer

Everett, WA · On-site

$182K - $214K/yr

Bachelor's degree in electrical engineering, Mechatronics, or a related field * 5+ years of experience developing and supporting electrical or electronic test systems in R&D or production ...

Karman Space & Defense

Test Technician I

Mukilteo, WA · On-site

Working with engineers and senior technicians to assist in test setup and execution * Able to read and understand technical drawings, specifications and procedures * Strong understanding of Safety ...

MAGNIX USA INC

Motor Control Engineer II

Everett, WA · On-site

$110K - $130K/yr

Support testing teams in test data processing, test reports, and troubleshooting findings in ... control software development. * Proven ability to work cross-functionally with software, power ...

Pacific Defense

Senior Systems Engineer

Mukilteo, WA

$117K - $160K/yr

... Development engineering team. As a member of the Pacific Defense group of companies, our growth is ... Waveform integration and test with Voice and Data * Proficiency in programming and/or hardware ...

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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 Jun 17, 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.

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 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 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 does a Senior Software Development Engineer in Test (SDET) 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.
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
Senior Software Engineer, Cybersecurity

Senior Software Engineer, Cybersecurity

Helion Energy

Everett, WA • On-site

$241K - $255K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 20 days ago

Job description

About Helion
We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone.
Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant.
This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths - values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait.
What You Will Be Doing:
As a Cybersecurity Software Engineer focused on product security, you will ensure that the firmware, software, and server infrastructure driving our fusion machines are resilient against attack. You'll work closely with firmware, software, and infrastructure engineers to embed security into every stage of the development lifecycle-reviewing designs, auditing code and dependencies, and integrating security checks into CI/CD pipelines. You'll lead initiatives in encryption, secrets management, and secure authentication to protect sensitive machine operations. Beyond building defenses, you'll champion security best practices across the organization, providing both the tools and the guidance to enable engineers to move quickly without sacrificing safety. This role is ideal for someone who wants to blend deep cybersecurity expertise with hands-on engineering to safeguard one of the most advanced energy technologies being built today. This is an onsite role that reports directly to the Lead Electrical Engineer at our Everett, WA office.
You Will:
  • Review firmware, software, and infrastructure designs to identify and mitigate security risks before implementation
  • Advocate for and implement security best practices across engineering, such as encryption, key rotation, and secure authentication
  • Deploy and manage application security tools (e.g., Snyk, Trivy, Docker image scanners) to audit dependencies, supply chain risks, and vulnerabilities
  • Own the definition and enforcement of product-level secrets management and credential handling
  • Lead initiatives in software and firmware hardening for production systems, ensuring resilience against potential adversarial attacks
  • Work with firmware, software, and infrastructure engineers to embed security into CI/CD pipelines and development workflows
  • Create and maintain internal guidelines for secure coding practices and data classification
  • Contribute to building institutional trust by ensuring our software and firmware meet high standards of security, reliability, and compliance
  • Serve as the voice of product security in design reviews, code reviews, and cross-functional engineering efforts

Required Skills:
  • Strong Linux systems knowledge, including security hardening and permissions management
  • Proficiency with Git-based workflows and secure software delivery practices
  • Solid understanding of modern encryption standards (TLS, AES, RSA, ECC) and key management practices
  • Hands-on experience with security engineering tools (SAST/DAST, dependency scanning, Docker/Kubernetes security, supply chain auditing)
  • Experience conducting secure code reviews and identifying common vulnerabilities
  • Strong programming background in at least two of: C++, Rust, Python, Typescript, or Java
  • Familiarity with vulnerability assessment and mitigation strategies across firmware, software, and server environments
  • Ability to work collaboratively with multi-disciplinary engineering teams and advocate for security without blocking progress

#LI-Onsite #LI-KL1
Benefits
Our total compensation package includes benefits, including but not limited to:
• Medical, Dental, and Vision plans for employees and their families
• 31 Days of PTO (21 vacation days and 10 sick days)
• 10 Paid holidays, plus company-wide winter break
• Up to 5% employer 401(k) match
• Short term disability, long term disability, and life insurance
• Paid parental leave and support (up to 16 weeks)
• Annual wellness stipend
Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

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