Software Engineer Intern

Annual releases gave way to two-week sprints years ago, and the platform now handles over 200 million API calls a day. Our engineering group is split into roughly 60 product teams, each owning its services end to end, with on-call shared across time zones. We started in 1995 and have grown to about 2,700 people.

The program:

Heatherlight Labs is hiring a Software Engineer Intern for June 2027. We need a student who can write clean code, test it and explain what it does. Prior internships are not required. The internship is fully remote. Interns join our Madrid team on daily calls and get a named mentor. Core hours are 10:00 to 15:00 CET.

What you'll do:

• Present a short demo of your work to the team every two weeks.
• Add unit tests with pytest or Jest so new code does not lower coverage.
• Build REST API endpoints and document them in Postman or Swagger.
• Update the README and internal Confluence pages when you change how something works.
• Write and test backend features in Python or Node.js under the guidance of a senior developer.
• Raise pull requests on GitHub and respond to code review comments within a day.
• Profile slow endpoints and suggest fixes, such as adding an index or caching a result.

Basic qualifications:

• Available 40 hours a week for the full internship.
• Currently enrolled in a bachelor's or master's program, graduating 2028.
• Able to communicate clearly in written English on Slack and in pull requests.
• Some experience with Git, even if only on college or personal projects.
• Own laptop with at least 8 GB RAM and a reliable internet connection.
• Good grasp of at least one programming language: Python, Java, JavaScript or C++.
• Basic understanding of data structures, OOP and how HTTP requests work.

Preferred qualifications:

• Contributions to an open source project, however small.
• Familiarity with Django, Flask, FastAPI or Express.

What you'll learn:

• How a production codebase is organised, deployed and monitored.
• Code review on every pull request, so expect a lot of feedback on naming, tests and structure.
• Certificate and letter of recommendation on completion, plus a pre-placement offer for strong performers.
• You will ship at least one feature that real users touch before the internship ends.

Program dates: June 2027, 12 weeks.

Pay: $47.50-$57.50 per hour

Benefits for interns:

• Learning and development stipend.
• Intern events and speaker sessions (virtual)
• Final presentation to leadership.
• Paid sick time.

Duration: 12 weeks. Start: June 2027.

Demo job created on 11jobs for testing and demonstrations. It is not an actual opening at Heatherlight Labs.