Ivan Križaj
Hi, I'm Ivan Križaj, a software developer from Čakovec, Croatia. js, TypeScript, React, and AWS.
About
Hi, I’m Ivan Križaj, a software developer from Čakovec, Croatia. I design, build, and deploy cloud-based applications using Node.js, TypeScript, React, and AWS. I thrive in Agile, test-driven environments and enjoy pair and mob programming to share knowledge and ship reliable software.
Currently I enjoy solving complex logistics and data-workflow challenges, building modular systems, and crafting clean, maintainable code. I am passionate about performance, security, and delivering great user experiences, from APIs to frontend interfaces.
- 5 years' experience
- Joined January 2026
Languages
- EnglishFluent
- CroatianAdvanced
Industry experience
- Software & Internet
- Professional Services
Work experience
Developed a full-stack system to manage arcade machine logistics and complex, multi-level warehouse distribution. Streamlined asset tracking by engineering automated goods-receiving workflows and real-time Telegram notifications for inventory movements.
Designed and maintained system integrations (SAP, Shopify, WMS) enabling automated data exchange and operational sync. Implemented a sync processing and data pipelines using Kafka and internal queues for reliable cross-service communication. Integrated shipping carriers (DHL, Hermes, Schenker) for label/document generation and tracking flows. Wrote unit tests and collaborated on production debugging, API reliability, and secure data handling (Keycloak/JWT, RBAC). Implemented an internal AWS S3 connector service and worked with S3, EC2, and CloudWatch in production. Tech Stack: JavaScript, React, Node.js, Express, PostgreSQL, Material-UI.
Established a Storybook-based design system to standardize UI components. Contributed to web projects with performance and cross-browser focus. Tech Stack: JavaScript, React, Node.js, Express.
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