Denys Oliinyk

I’m a senior full-stack engineer and technical consultant based near Barcelona.

I work with Zasta on tax automation systems used by 100k+ users per year, and run Intelonik, where I help companies build reliable web platforms, integrations, automation systems, and product infrastructure.

I’ve worked across SaaS, fintech, e-commerce, Shopify, internal tools, and content platforms. My main stack includes React, Next.js, Laravel, Node.js, Shopify, Strapi, PostgreSQL, AWS, Vercel, and practical AI-assisted engineering workflows.

You can read my notes, view selected case studies, or ask my work profile about my experience.