Mandatory InternshipUnpaid 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