Summer Software Engineering Intern

About Harborlane Labs:

Harborlane Labs employs 440 people across engineering hubs in London and three other locations, building ERP software for mid-market manufacturers.

The internship:

Our Integrations team is five engineers working fully remote across two time zones. The intern picks up small backend tickets first and moves to bigger features once comfortable. This role is fully remote within the UK. Most of our work is async, and meetings are kept short.

What you'll do:

• 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.
• 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.
• Update the README and internal Confluence pages when you change how something works.
• Build REST API endpoints and document them in Postman or Swagger.
• Profile slow endpoints and suggest fixes, such as adding an index or caching a result.

Requirements:

• Currently enrolled in a bachelor's or master's degree, graduating 2026 or 2027.
• Available for the full internship period.
• Eligible to work in the UK.
• Based in the UK for the duration of the internship.
• Basic understanding of data structures, OOP and how HTTP requests work.
• Some experience with Git, even if only on college or personal projects.
• Good grasp of at least one programming language: Python, Java, JavaScript or C++.
• Comfortable writing simple SQL queries (SELECT, JOIN, GROUP BY)
• Own laptop with at least 8 GB RAM and a reliable internet connection.
• Must be able to overlap at least 4 hours a day with the team's working hours.

Nice to have:

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

What you'll learn:

• You will ship at least one feature that real users touch before the internship ends.
• Code review on every pull request, so expect a lot of feedback on naming, tests and structure.
• Writing tests is part of the job here, and you will get good at it.

Duration: 6 months

Start date: Dec 2026

Stipend: £29,000 - £31,000 per year

What we offer:

• Home working allowance.
• Reference on completion.
• Access to online training.
• Paid holiday accrued during the placement.
• Flexible working hours.
• Mentoring from an experienced team member.

Duration: 6 months. Start: Dec 2026.

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