Software engineering internship: business line applications

Introduction

FC-223 is responsible of developing SW applications in wafer alignment domain at ASML. We create tools that help our customers to optimize, monitor and diagnose wafer alignment process within Twinscan.

Your assignment

We are looking for a motivated intern to support our software development teams in improving the quality and maintainability of our codebase. The focus will be on addressing code issues identified by SonarQube, supporting refactoring efforts, and enhancing unit test coverage.

Key Responsibilities

• Analyze and resolve code issues reported by SonarQube (bugs, code smells, security hotspots).

• Assist in refactoring existing code to improve structure, readability, and performance.

• Improve and expand unit test coverage in critical areas of the codebase.

• Collaborate with developers to understand system architecture and coding standards.

• Contribute to clean code and test automation practices.

Learning Opportunities

• Gain hands-on experience with static code analysis tools like SonarQube.

• Deepen understanding of clean code principles and refactoring techniques.

• Learn to write effective and maintainable unit tests 

• Work in a professional Agile development environment with experienced engineers.

Your profile

To be a great match for this internship you:

• Are a (HBO) bachelor student Software Engineering, Computer Science or a related field.

• Have experience in Python and Maven.

• Are able to work independently and autonomously and are pro-active.

• Have strong communication skills and are fluent in English (verbal and written).

This is a (HBO) bachelor apprentice internship for 6 to 12 months, for 2 to 5 days per week (at least 3 days onsite for full-time). The start date of this internship is September 2025.

Other requirements you need to meet

• You are enrolled at an educational institute for the entire duration of the internship;

• You are located in the Netherlands to perform your internship. In case you are currently living/studying outside of the Netherlands, your CV/motivation letter includes the willingness to relocate;

• If you are a non-EU citizen, studying in the Netherlands, your university is willing to sign the documents relevant for doing an internship (i.e., Nuffic agreement).

Diversity and inclusion

ASML is an Equal Opportunity Employer that values and respects the importance of a diverse and inclusive workforce. It is the policy of the company to recruit, hire, train and promote persons in all job titles without regard to race, color, religion, sex, age, national origin, veteran status, disability, sexual orientation, or gender identity. We recognize that diversity and inclusion is a driving force in the success of our company.

Need to know more about applying for a job at ASML? Read our frequently asked questions.