Sr. Software Engineer in Test (Madrid-based) at Align… · Madrid

We are Align Technology/Invisalign https://www.aligntech.com/ American multinational, we’re a NASDAQ 100 company with a start-up mindset that fabricates his own medical products being worldwide leaders.

We are seeking a proactive and detail-oriented Software Quality Assurance Engineer to join our 3D manufacturing software team. In this role, you will ensure the quality and reliability of complex 3D applications that drive cutting-edge innovations in engineering and manufacturing.

This is a complex process that requires an innovative way of thinking when it comes to something that hasn't been done before.

In Align you will be part of a cross-functional and multiregional development organization utilizing a broad set of technologies and tools. You will have the opportunity to interact and share experiences with colleagues from multiple countries and cultures that will help you to grow with us and develop your professional career

Key Responsibilities

In this role, you will…

• Own the quality strategy for business-critical 3D/CAD/CAM software products and drive quality initiatives across multiple projects.
• Define test approaches, quality gates, and success criteria for complex software releases.
• Design, review, and improve test strategies, test plans, and test cases, ensuring comprehensive coverage of functional and non-functional requirements.
• Lead testing activities throughout the software development lifecycle, including estimation, planning, execution, monitoring, and reporting.
• Verify the correctness, reliability, and performance of geometry-intensive software workflows used in digital manufacturing.
• Analyze complex software behavior, investigate defects, perform root cause analysis, and drive resolution of quality issues.
• Build and maintain scalable test automation solutions using Python and modern testing frameworks.
• Drive quality engineering practices within CI/CD pipelines and continuously improve automation coverage.
• Conduct functional, integration, system, performance, and hardware-software validation testing.
• Collaborate closely with Product Owners, Software Engineers, and Architects to clarify requirements, identify risks, and ensure product quality from early design through release.
• Mentor QA engineers, promote testing best practices, and contribute to the evolution of the team's quality culture.

Skills, Knowledge & Expertise

In this role, you’ll need…

• 8-12 years of experience in Software Quality Assurance or Software Development Engineer in Test roles.
• Experience testing complex desktop applications, engineering software, or 3D/CAD/CAM systems.
• Strong understanding of 3D geometry concepts, mesh-based models, and geometric data processing.
• Ability to reason about geometric algorithms and effectively validate the results of geometry-processing operations.
• Deep understanding of software testing methodologies, quality engineering practices, and modern SDLC processes.
• Proven experience designing and implementing automated test solutions using Python.
• Experience defining test strategies and leading testing efforts for medium-to-large projects.
• Experience with non-functional testing, including performance, scalability, reliability, and stability testing.
• Strong analytical and problem-solving skills with the ability to investigate complex technical issues.
• Experience working in Agile development environments.
• Effective communication skills and ability to collaborate with cross-functional teams. Intermediate to Upper-Intermediate English (B2+).

Desired:

• Experience with CI/CD platforms and build pipelines such as Bamboo, Jenkins, GitHub Actions, or Azure DevOps.
• Familiarity with JIRA, Confluence, Git, and test management tools. Knowledge of SQL and data validation techniques.
• Experience with medical device, manufacturing, or digital production software.
• Exposure to 3D/CAD tools such as Solidworks, Geomagic, or Magics.

Challenges of the Job:

• Ensuring quality of highly specialized 3D/CAD/CAM workflows used in large-scale manufacturing environments.
• Testing software that combines complex geometry processing, visualization, hardware interaction, and manufacturing automation.
• Balancing release speed with quality and regulatory expectations in a business-critical environment.
• Driving test automation and quality improvements across multiple applications and teams.

Career Growth Opportunities:

• Become a recognized quality engineering expert in digital manufacturing and 3D software.
• Lead quality initiatives spanning multiple products and development teams.
• Grow into Staff SDET, QA Lead, Engineering Manager, or Software Architect career paths.
• Influence product quality strategy for next-generation digital manufacturing solutions.