Senior Software Engineer in Test; SDET Seattle, WA

Position: Senior Software Engineer in Test (SDET) Seattle, WA

The Nuclear Company is the fastest growing startup in the nuclear and energy space creating a never before seen fleet‑scale approach to building nuclear reactors. Through its design‑once, build‑many approach and coalition building across communities, regulators, and financial stakeholders, The Nuclear Company is committed to delivering safe and reliable electricity at the lowest cost, while catalyzing the nuclear industry toward rapid development in America and globally.

Senior

Software Engineer in Test (SDET) About The Nuclear Company

The Nuclear Company (TNC) is at the forefront of revolutionizing nuclear energy through cutting‑edge technology and innovative digital solutions.

We're building Nuclear OS, a comprehensive digital platform that transforms how nuclear facilities are designed, constructed, and operated.

Our technology staff is embedded alongside engineering, procurement, and construction teams, ensuring our software solutions are built from real‑world nuclear deployment experience.

Position Overview

We're seeking a passionate Software Engineer in Test to join our mission‑critical team developing software that ensures the safety, compliance, and efficiency of nuclear operations. This role combines the excitement of cutting‑edge technology with the responsibility of supporting clean energy infrastructure that powers our future.

Key Responsibilities

• Design and implement comprehensive test automation frameworks for Nuclear OS applications
• Develop testing strategies for safety‑critical nuclear software systems
• Create and maintain QA/QC data validation systems, including inspection reports, test results, and compliance documentation
• Build automated testing pipelines that integrate with our continuous deployment processes
• Develop advanced analytics and AI capabilities
• Implement foundational architecture that combines Palantir's powerful data integration and modeling capabilities with quality objectives

Nuclear‑Specific Testing

• Validate QA records with attributes like date, result (pass/fail), inspector credentials, and linkage to ITAAC requirements
• Test software systems that manage nuclear component tracking, system testing, and regulatory compliance
• Implement data quality checks and validation routines to catch inconsistencies in critical nuclear data
• Ensure software meets stringent nuclear industry standards and regulatory requirements

Advanced Testing & Analytics

• Develop testing frameworks for root cause analysis tools that trace system histories, component manufacturing records, and test procedures
• Create performance and load testing suites for mission‑critical nuclear operations software
• Build testing infrastructure for AI‑powered compliance and project management tools

Quality Assurance & Compliance

• Ensure testing processes conform to Nuclear Quality Assurance programs (NQA-1 standards)
• Validate electronic signature systems and traceability workflows
  
  Test regulatory reporting and documentation systems
• Strong problem‑solving skills with ability to work in cross‑functional teams
• Experience translating business requirements into technical solutions
• Ability to work effectively with non‑technical stakeholders
• Excellent written and verbal communication skills

Technical Skills

• 5+ years of software testing experience, preferably in regulated industries
• Test automation expertise with frameworks like Selenium, Cypress, TestNG, or Playwright
• API testing proficiency using tools like Postman, REST Assured, or similar
• Database testing experience with SQL and No
  
  SQL databases
• CI/CD pipeline experience with Jenkins, Git Lab CI, or Azure Dev Ops

Nuclear Industry Knowledge (Preferred)

• Understanding of nuclear regulatory requirements and compliance frameworks
• Experience with personnel qualification tracking and training record systems
• Knowledge of ITAAC (Inspections, Tests, Analyses, and Acceptance Criteria) processes
• Familiarity with nuclear quality assurance standards

Professional Attributes

• Detail‑oriented mindset with commitment to safety and quality
• Analytical problem‑solving skills for complex system testing
• Collaborative approach to working with cross‑functional teams
• Adaptability to work in a fast‑paced, innovative environment
• Securi…