Summer Software Engineering Intern

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. You can work from home anywhere in Spain. We have no office requirement. You can set your own hours around a daily morning check-in.

What you'll do

• Fix bugs from the Jira backlog, starting with small, well-defined tickets
• 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
• Join the daily 15-minute standup on Google Meet and post a short written update in Slack
• Refactor old modules when asked, keeping behaviour the same
• Add unit tests with pytest or Jest so new code does not lower coverage

What we're looking for

• Eligible to work in Spain
• Based in Spain for the duration of the internship
• Available for the full internship period
• Good grasp of at least one programming language: Python, Java, JavaScript or C++
• Must be able to overlap at least 4 hours a day with the team's working hours
• Basic understanding of data structures, OOP and how HTTP requests work
• A GitHub profile with at least two projects you wrote yourself
• Comfortable writing simple SQL queries (SELECT, JOIN, GROUP BY)

Duration: 6 months

Start date: Dec 2026

Stipend: €1,100 - €1,450/month

What we offer

• Letter of recommendation
• Mentorship
• Certificate of completion

Tell us your notice period and what salary you are looking for.

Duration: 6 months. Start: Dec 2026.

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