Role Description A Java Full Stack Developer designs, develops, and maintains both the client-side and server-side of web applications. You own features end-to-end, from database schema and REST API design through to responsive UI components, collaborating closely with product, design, and DevOps teams to ship high-quality software at pace. - Build and maintain scalable back-end services using Java and Spring Boot, ensuring high availability and clean service boundaries. - Develop responsive, accessible front-end interfaces using React, Angular, or Vue.js in close collaboration with UI/UX designers. - Design, query, and optimise relational databases such as PostgreSQL or MySQL, as well as NoSQL stores like MongoDB where appropriate. - Create and consume RESTful and GraphQL APIs that are secure, well-documented, and easy for other teams to integrate. - Write unit, integration, and end-to-end tests using tools like JUnit, Mockito, and Selenium to maintain high code quality. - Participate actively in code reviews, architectural discussions, and help uphold engineering standards across the team. - Deploy and monitor applications on cloud platforms (AWS, GCP, or Azure) using CI/CD pipelines and containerisation tools. Qualifications - 3+ years of Java development experience, with a strong understanding of OOP and design patterns. - Hands-on experience with Spring Boot, Spring MVC, and Spring Security for building production-grade applications. - Proficiency in at least one front-end framework — React, Angular, or Vue.js — alongside HTML5 and CSS3. - Solid experience working with both relational (SQL) and NoSQL databases in a professional setting. - Familiarity with Git version control, Docker for containerisation, and basic Kubernetes concepts. - Proven ability to design and implement RESTful or GraphQL APIs with attention to security and performance. - Proficiency in English.

Role Description 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. - 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 Qualifications - 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 Description IndieKidz GmbH is a young Berlin based startup building meaningful learning experiences for children. We create screen free books, magazines, and activities that blend early learning with cultural roots. Alongside this, we are building Occibo, a modern platform for authors and publishers. Occibo uses AI assisted workflows to simplify children’s book creation. Together, we combine creativity, technology, and real publishing needs. Our goal is to make high quality children’s content easier to create and joyful to use.

• Design, develop, and maintain scalable backend services using TypeScript and Node.js • Participate in migrating applications and services from on-premises infrastructure to AWS • Build and maintain serverless solutions following cloud-native best practices • Implement integrations and processing workflows for accounting, tax, payments, and transaction data • Collaborate closely with Product, QA, and Engineering to deliver high-quality features • Write and maintain automated and unit tests (Jest) • Participate in code reviews and promote engineering best practices and maintainable design • Monitor, troubleshoot, and optimize application performance, reliability, and security • Ensure traceability and auditability across business processes and generate accounting/tax files.

• Participar en desarrollos de proyectos trabajando con entornos tecnológicos actualizados • Asumir un rol de desarrollador/a o analista programador/a Java con modalidad 100% teletrabajo