Summer Software Engineering Intern (Summer 2027)

Who we are

Our engineering group is split into roughly 60 product teams, each owning its services end to end, with on-call shared across time zones. Most engineers work remotely and come into the office one week a quarter for planning.

The internship

The intern will work on internal tools and APIs used by our support and operations staff. Daily standup on Google Meet, everything else async on Slack. Remote within Spain. The team meets in Madrid once a quarter, travel covered. Normal working hours, Monday to Friday.

What you'll do

• Write and test backend features in Python or Node.js under the guidance of a senior developer.
• Profile slow endpoints and suggest fixes, such as adding an index or caching a result.
• Refactor old modules when asked, keeping behaviour the same.
• Present a short demo of your work to the team every two weeks.
• Build REST API endpoints and document them in Postman or Swagger.
• Add unit tests with pytest or Jest so new code does not lower coverage.
• Query and update data in PostgreSQL or MySQL, including simple migrations.

What we're looking for

• Based in Spain for the duration of the internship.
• Currently enrolled in a bachelor's or master's degree, graduating between December 2027 and June 2028.
• Available for the full internship period.
• Eligible to work in Spain.
• Available for 30 to 40 hours a week for the full internship period.
• Comfortable writing simple SQL queries (SELECT, JOIN, GROUP BY)
• A GitHub profile with at least two projects you wrote yourself.
• Some experience with Git, even if only on college or personal projects.
• Must be able to overlap at least 4 hours a day with the team's working hours.
• Able to communicate clearly in written English on Slack and in pull requests.

What you'll learn

• 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.

Duration: 3 months

Start date: Summer 2027

Stipend: €1,150 - €1,550/month

What we offer

• Online learning budget.
• Flexible hours.
• Mentorship.
• Internet allowance.
• Possibility of a full-time offer.

Duration: 3 months. Start: Summer 2027.

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