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Kamil Szaffner

@kamilszaffner

Senior Frontend Developer at Acoustic who developed an AI website composer combining generated content with a visual drag-and-drop editor.

Poland

Message

At Acoustic, I developed an AI-powered website composer from scratch, combining AI-generated content with a visual drag-and-drop editor. I also configured reusable Claude Code Rules and Skills to support AI-assisted development workflows.

At ROIROI (formerly STÖK), I built and maintained e-commerce platforms with Next.js, React and TypeScript. I improved SEO, performance and accessibility, and developed Node.js services and REST APIs supporting e-commerce applications.

Earlier, at EY GDS, I built a Progressive Web App for railway infrastructure issue tracking as a sole developer, including offline functionality. I also developed a mobile application for managing conference sessions and contributed to Angular migration work at Infor.

Experience

Work history, roles, and key accomplishments

Senior Frontend Developer

Acoustic

Feb 2026 - Sep 2026 (7 months)

Designed and developed a new AI-powered website composer from scratch, combining AI-generated content with a flexible drag-and-drop editor. Built the composer using React, Redux Toolkit, RTK Query and Styled Components, establishing reusable components and scalable frontend architecture.

React Redux toolkit Redux RTK Query TypeScript JavaScript styled components Claude Code GraphQL Git Zustand Storybook React Testing Library

Senior Frontend Developer

ROIROI

Mar 2022 - Dec 2025 (3 years 9 months)

Built and maintained modern e-commerce platforms using Next.js, React and TypeScript for desktop and mobile users. Developed scalable frontend solutions and Node.js services, improved SEO, performance and accessibility, and mentored junior developers.

Next.js React TypeScript JavaScript NodeJS Tailwind styled components REST APIs Storyblok Storybook Centra React Testing Library Playwright Jest WCAG GraphQL Git

Frontend Developer

EY GDS

Jul 2019 - Feb 2022 (2 years 7 months)

Built scalable frontend features using React, Angular, TypeScript, Redux, Angular Material and React Bootstrap. Designed and developed REST APIs and backend services using Node.js and Express, and built a Progressive Web App for tracking railway infrastructure issues.

React React Native NativeScript Angular TypeScript JavaScript Redux NodeJS Express REST APIs Ionic PWA Cypress Angular Material ReactBootstrap CSS Modules Git

Demo Services Engineer / Frontend Developer

Infor

Oct 2017 - Jun 2019 (1 year 8 months)

Contributed to migration from AngularJS to Angular, improving performance and maintainability. Built production-ready widgets and components using Angular, TypeScript and D3.js, and integrated frontend components with enterprise ERP systems.

AngularJS Angular TypeScript JavaScript D3.Js ERP Git SQL

Programmer / Junior Full Stack Web Developer

GEFIRA FOUNDATION / Caisson Elektronik

Jan 2016 - Sep 2017 (1 year 8 months)

Built responsive websites using WordPress, OpenCart, PHP, HTML, SCSS, jQuery and Bootstrap. Developed custom WordPress plugins and themes, and implemented API and social integrations.