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Senior QA Automation Engineer

Nucleus Security
Remote

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Job Details

Full-time
$135,000 a year

Benefits

Disability insurance
Dental insurance
Paid time off
Vision insurance
Life insurance

Qualifications

Defect resolution root cause analysis
Continuous Delivery (CD) implementation
Tooling
Software coding
Selenium
Java
Programming languages
Version control systems
Quality control problem-solving
APIs
Quality check automation
DevOps automation
Playwright
Design patterns

Full Job Description

Overview

We are seeking a detail-oriented and proactive QA Automation Engineer to join our team. This role is responsible for ensuring the quality, reliability, and performance of our applications through a combination of manual and automated testing across front-end and back-end systems.
The ideal candidate is passionate about software quality, enjoys working in a collaborative environment, and is motivated to improve testing processes, tools, and automation coverage.

About Nucleus Security

Nucleus Security is transforming how security and development teams manage vulnerabilities at a scale. Our platform unifies vulnerability data across scanners and environments, enabling organizations to prioritize and remediate vulnerabilities efficiently. Through our integrations, we empower customers to ingest data from their existing tools with minimal setup and maximum reliability.

Core Responsibilities

What You Will Do

Ensure the quality and reliability of assigned products across the full stack — UI, APIs, and data — defining test approach and risk coverage with the QA Manager, and leveraging AI tools to improve coverage and efficiency
Build, extend, and improve scalable automation frameworks in Selenium and Playwright that the team relies on, reducing manual testing effort and increasing confidence in every release
Act as a quality advocate within the team — reviewing test code, sharing testing practices with peers, and raising design concerns early enough to prevent defects rather than catch them

Testing & Quality Assurance

Plan and execute test coverage for complex, cross-system features, including functional, regression, smoke, integration, and end-to-end testing
Design and execute manual and automated test cases covering functionality, performance, and reliability, including positive, negative, and edge cases
Assess risk and prioritize testing effort, making clear recommendations on depth of coverage versus delivery timelines
Map test cases to business requirements and functional designs, ensuring traceability and identifying gaps before development begins
Investigate complex or intermittent failures to root cause, distinguishing product defects from test instability and environment issues
Document and report defects, verify fixes, and ensure timely resolution in collaboration with development teams

Database & Data Validation

Write and execute complex SQL queries to validate data integrity, transformations, and business logic across the application stack
Verify data accuracy through ingestion, normalization, and processing workflows — record counts, deduplication, field-level mapping, and malformed or partial data
Validate database interactions triggered by UI and API operations, and test data migrations, schema changes, and backfills for correctness and backward compatibility
Build and maintain reusable test data sets and database setup and teardown routines for reliable, repeatable automated runs

Automation & Frameworks

Implement and review automated test scripts using Java with Selenium WebDriver and Playwright, following best practices such as the Page Object Model
Contribute to the architecture and long-term health of automation frameworks — structure, reusable components, reporting, and test data management
Incorporate database validation into automated suites through query-based assertions and programmatic test data setup
Improve automation reliability by reducing flakiness, execution time, and maintenance cost as suites grow
Integrate automated tests into CI/CD pipelines and support optimization within DevOps workflows, including parallel execution
Support performance and scale testing, and recommend tools and processes that measurably improve QA effectiveness

AI-Assisted Testing

Hands-on experience using AI tools for test case generation, test data creation, and defect analysis
Familiarity with Model Context Protocol (MCP) tooling, such as Playwright MCP, for AI-driven browser interaction, exploratory testing, and test script generation
Experience with AI-assisted coding tools for building and maintaining automation scripts, with sound judgment about where AI output needs human validation
Ability to apply AI thoughtfully within QA workflows and share what works with the rest of the team

Collaboration & QA Practices

Partner with the QA Manager, developers, and product managers to clarify requirements and acceptance criteria
Support and mentor less experienced QA engineers through technical guidance, code review feedback, and knowledge sharing
Participate in design reviews and technical discussions, surfacing testability and reliability concerns early
Contribute to continuous improvement of QA processes, tools, and standards across the team

What we’re looking for:

Required

8+ years in software quality assurance, with at least 5 years in test automation
Strong programming skills in Java, with demonstrated ability to write clean, maintainable, reviewable test code
Hands-on experience with Selenium WebDriver and Playwright, and with design patterns such as the Page Object Model
Experience contributing to the design or significant refactoring of an automation framework, not just writing tests within one
Solid API testing experience and strong SQL skills, with hands-on experience validating application behavior directly against relational databases
Working knowledge of CI/CD tooling and version control, with experience running automation reliably within pipelines
Strong analytical and debugging skills, with a track record of driving complex issues to root cause

Preferred (Nice to Have)

Experience working in cybersecurity, vulnerability management, or security-focused products and environments
Familiarity with security concepts such as vulnerabilities, risk scoring, APIs, and data protection practices
Experience with MCP servers or agent-based testing workflows beyond basic tool usage
Experience testing ETL or data pipelines, or working with large-scale or NoSQL data stores
Experience with performance or load testing, cloud environments, or containerized test infrastructure

Common Skills & Traits

Self-starter with a strong ownership mindset and the ability to wear multiple hats in a fast-paced environment
Strong problem-solving and collaboration skills, with the maturity to disagree constructively
Ability to quickly learn new tools, technologies, and frameworks — and to teach them to others
Willingness to fail fast, iterate, and improve

Why Nucleus?

Nucleus is a truly unique solution that’s defining a market AND making an actual impact.
We’re biased, but you will get to work with one of the best teams in security. We have a lot to get done and we work extremely hard, but we have fun in the process.
Work with a high-performing team that values creativity, autonomy, and innovation.
Collaborate on meaningful products that improve the security posture of major organizations.
Enjoy flexible remote work arrangements and a strong emphasis on work-life balance.

Just a few of our Outstanding benefits
Fully remote
Flexible PTO
401k company contribution
100% company-paid healthcare options
100% company-paid dental
100% company-paid vision
100% company-paid life insurance
100% company-paid short-term disability insurance
>>>and more!

Additional Information

At Nucleus we are committed to achieving excellence in our field by combining diversity, collaboration, teamwork, and pride in our work. All qualified applicants will receive consideration for employment without regard to race, sex, color, religion, sexual orientation, gender identity, national origin, protected veteran status, or disability.

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