Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

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.…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.

Ivan Križaj

Full Stack Developer, Back-End Developer, Web Developer





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.…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.

Available to hire

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.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Croatian

Advanced

Work Experience

Full Stack Developer at KRTECH DIGITAL d.o.o.

August 1, 2025 - Present

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.

Back-End Developer at Triad.d.o.o.

July 1, 2023 - August 1, 2025

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.

Web Developer

September 1, 2019 - May 1, 2021

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.