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

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.

1. Build and improve backend APIs using Node.js, TypeScript, and Express.js
2. Work with Supabase for database, authentication, and data management
3. Support file storage workflows using Cloudflare R2
4. Help build AI workflow orchestration for book creation, illustration, layout, and export
5. Work with queue-based processing using Redis and BullMQ
6. Support integration with AI image-generation workflows such as ComfyUI
7. Create clean, maintainable, and well-documented code
8. Debug, test, and improve existing backend services
9. Support selected frontend or full-stack tasks when needed
10. Collaborate with product, design, and content team members

• 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

• 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