Mandatory Internship(Unpaid): Backend / Full-Stack Developer for AI SaaS

IndieKidz GmbH is a Berlin-based early stage startup building creative learning products for children.

Our software product, Occibo, is an AI-assisted children’s book creation platform. It helps authors, parents, teachers, and small publishers turn a manuscript into a complete children’s book workflow, including editing, illustration planning, character consistency, layout, export, and promotional assets.

We are looking for a motivated Backend / Full-Stack Developer Intern to support the development of Occibo mainly open to work in early stage startup.

Duration: 3–6 months / Compensation: Unpaid mandatory internship

Tasks

You will work on the technical development of Occibo, mainly on backend services, APIs, database logic, file handling, AI workflow integration, and selected full-stack features.

This role is ideal for a student who wants hands-on experience building a real SaaS product using modern backend and AI infrastructure.

Build and improve backend APIs using Node.js, TypeScript, and Express.js

Work with Supabase for database, authentication, and data management

Support file storage workflows using Cloudflare R2

Help build AI workflow orchestration for book creation, illustration, layout, and export

Work with queue-based processing using Redis and BullMQ

Support integration with AI image-generation workflows such as ComfyUI

Create clean, maintainable, and well-documented code

Debug, test, and improve existing backend services

Support selected frontend or full-stack tasks when needed

Collaborate with product, design, and content team members

Requirements

You have hands-on knowledge of JavaScript / TypeScript

You understand backend development, APIs, databases, and Git

You are interested in early stage AI, SaaS products, and product development

You can work independently in a remote setup

You write clean code and are willing to learn

You are reliable, curious, and proactive

Benefits

Real experience building an AI SaaS product from early stage

Hands-on work with modern backend and AI infrastructure

Exposure to product thinking, architecture, and startup execution

Opportunity to work directly with the founder

Remote and flexible working setup

Internship certificate after successful completion

Recommendation letter based on performance

Company

IndieKidz GmbH / Occibo

Location

Remote

Employment Type

Mandatory Internship / Pflichtpraktikum

Duration

3–6 months

Compensation

Unpaid mandatory internship

Please send us:

Your CV

GitHub profile or portfolio

Short note explaining why you are interested in this internship

Your required internship duration and earliest start date