Ivan Lacković

Contract remote engagement delivering a back-office invoicing solution: Next.js (React) front-end with Firebase, D365 integration for invoicing management and data syncing; automated invoice processing and data interpretation using Google Cloud Document AI; streaming workflows for invoice creation and email-based data extraction. Redesigned and optimized a marketing website using the latest Next.js version, improving performance, SEO, and multilingual support. 7+ years of experience building robust, scalable front-end and back-end systems across e-commerce, SaaS, and enterprise environments.

Hybrid frontend/backend role focused on re-building an e-commerce site from the ground up using Next.js (React), Node.js, Strapi CMS, AWS, and Vercel. Led frontend architecture, migrated data models to PostgreSQL/MySQL, and implemented SEO/performance improvements. Built CMS integrations for frontend projects, designed scalable data models, and ensured robust CI/CD pipelines. Mentored junior engineers, established coding standards, and extended Storybook-driven component libraries for a consistent UI across products.

Led e-commerce site rewrite from the ground up using Next.js (React), Node.js, Strapi CMS, AWS, and Vercel. Built templated frontend components derived from CMS data; created a scalable architecture with a CI/CD pipeline and migrated hosting from AWS to Vercel to reduce costs. Achieved a 391% increase in online orders and a 32% rise in average order value; delivered new order flow and loyalty features with payment gateway integration; significant SEO/performance improvements.