Sr. Software Engineer in Test

Align Technology; Köln; On-site; EUR 65,000 - 85,000; Full time

Job summary

A leading healthcare technology company is looking for a Sr. Software Engineer in Test located in Germany. This position requires strong experience in QA and automation, where you will design and maintain scalable test frameworks and collaborate closely with development teams to ensure product reliability and user experience. Candidates must hold a degree in Computer Science and have 8+ years of experience in software testing. Proficiency in Python, Selenium, and CI/CD systems is needed for this crucial role.

Qualifications

• 8+ years of experience as a Software QA Engineer, Test Engineer, or SDET.
• Hands-on experience with web and mobile test automation.
• Strong understanding of software quality principles.

Responsibilities

• Develop and maintain test plans, test cases, and reports.
• Implement automated test cases for new functionality.
• Collaborate with teams to ensure testability and integration reliability.

Skills

Analytical and problem-solving mindset

Proficiency in Python

Experience with Selenium or Playwright

Experience with Appium

Strong experience in Git

Excellent collaboration skills

Strong communication skills

Education

Bachelor’s or Master’s degree in Computer Science or related field

Tools

Jira

Pytest

Selenium

Appium

CI/CD systems (Jenkins, GitHub Actions)

Job description

Description

This position is ideal for experienced QA and SDET professionals with strong backgrounds in both QA and automation to join the ATD DE team as a Sr. Software Engineer in Test. You will design, implement, and maintain scalable test frameworks while also developing efficient test plans to ensure product reliability, functionality, and user experience. Working closely with development and product teams, you will validate multi‑platform, AWS‑based backend, web, and mobile applications including ClinCheck® and the mobile Invisalign Practice App. This role is key in ensuring high‑quality releases and advancing automation maturity across Align’s digital orthodontic solutions.

Department

Department: Research & Development

Location

Location: EMEA-Germany-Darmstadt-Tech

Key Responsibilities

• Develop and maintain test plans, test cases, and test reports to validate functionality, integration, and user workflows.
• Design, extend, and maintain automated testing frameworks for backend, web, and iOS applications.
• Implement automated test cases for new functionality and ensure continuous regression coverage.
• Contribute to and evolve the Pytest framework used for testing serverless backend services on AWS.
• Develop and maintain Selenium‑based automated tests for the ClinCheck® web application.
• Extend and improve Appium‑based automation coverage for the Invisalign Practice App (iOS).
• Collaborate with backend, frontend, and mobile engineers as well as product owners to ensure testability and integration reliability.
• Collaborate with external teams to set up communication and technical processes.
• Perform black‑box, system integration, and end‑to‑end testing to ensure robust and user‑ready software quality.
• Analyze, reproduce and document defects; work with developers to identify root causes and verify resolutions.

Skills, Knowledge & Expertise

• Education: Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field.
• Experience: 8+ years of professional experience as a Software QA Engineer, Test Engineer, or SDET, preferably in multi‑platform or cloud‑based environments.
• Skills:
  • Strong analytical and problem‑solving mindset, with a focus on quality ownership and continuous improvement.
  • Strong proficiency in Python and experience with Pytest or similar frameworks.
  • Strong experience with task and test management, and defect tracking (Jira, TM4J, etc.)
• Hands‑on experience with Selenium or Playwright in web automation, Appium in mobile test automation, or backend automation.
• Strong understanding of software quality principles, test data management, and observability in testing.
• Strong experience in Git.
• Familiarity with JIRA and Agile/Scrum practices.
• Knowledge of CI/CD systems (e.g., Jenkins, GitHub Actions, Bitbucket Pipelines).
• Familiarity with Allure or other test reporting tools.
• Communication: Excellent collaboration and documentation skills; upper‑intermediate English for effective work with distributed teams.
• Mindset: Analytical, self‑organized, and proactive — passionate about improving quality through both testing and automation.

Complementary skills

• Experience with Integration Services, API testing, microservices validation, or event‑driven backend architectures.
• Solid understanding of AWS architectures, serverless components, and CI/CD pipelines.
• Strong knowledge of OOP and design patterns.
• Understanding of performance testing, security testing, or usability validation principles.
• Experience in image analysis in UI automation or mobile camera testing.
• Ability to lead the interview process.

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Equal Opportunity Statement

Align Technology is an equal opportunity employer. We are committed to providing equal employment opportunities in all our practices, without regard to race, color, religion, sex, national origin, ancestry, marital status, protected veteran status, age, disability, sexual orientation, gender identity or expression, or any other legally protected category. Applicants must be legally authorized to work in the country for which they are applying, and employment eligibility will be verified as a condition of hire.