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Hi, I'm Marek. I'm a frontend developer based in Szczecin, Poland. I have 4+ years of commercial experience building modern React-based web apps for international clients. I specialize in scalable UI architecture, reusable component libraries, and close collaboration with designers, backend developers, and stakeholders to deliver high-quality user experiences.…

Marek Winiarski

Front-End Developer, Back-End Developer, Web Developer, +4

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Hi, I'm Marek. I'm a frontend developer based in Szczecin, Poland. I have 4+ years of commercial experience building modern React-based web apps for international clients. I specialize in scalable UI architecture, reusable component libraries, and close collaboration with designers, backend developers, and stakeholders to deliver high-quality user experiences.…

Available to hire

Hi, I’m Marek. I’m a frontend developer based in Szczecin, Poland. I have 4+ years of commercial experience building modern React-based web apps for international clients.

I specialize in scalable UI architecture, reusable component libraries, and close collaboration with designers, backend developers, and stakeholders to deliver high-quality user experiences.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

Polish

Fluent

English

Advanced

Work Experience

Full Stack Developer at Agencja Softwareowa

May 1, 2023 - Present

Developed and maintained full-stack web applications using React on the frontend and Node.js on the backend. Designed reusable React components and custom hooks to ensure scalability and consistency across projects. Built and integrated RESTful APIs and backend services for client-facing applications. Created and maintained a custom internal npm component library, improving development efficiency. Styled applications using Styled Components and implemented routing with React Router. Customized and extended WordPress websites based on individual client requirements. Worked directly with clients in agile sprints to gather requirements and deliver production-ready solutions.

Junior React Developer at Agencja Softwareowa

May 1, 2022 - May 1, 2023

Implemented UI components and features using React and modern JavaScript. Integrated REST APIs and supported backend development in Node.js. Contributed to shared npm component libraries. Styled applications with Styled Components and supported client WordPress customization.

Junior Frontend Developer at Amplifier

January 1, 2022 - May 1, 2022

Developed frontend components using React. Wrote unit tests for UI components. Contributed to UI/UX improvements. Participated in Scrum ceremonies and team planning.

Full Stack Developer at Agency Software House

May 1, 2023 - Present

Developed and maintained full-stack web applications using React on the frontend and Node.js on the backend. Designed reusable React components and custom hooks to ensure scalability and consistency across projects. Built and integrated RESTful APIs and backend services for client-facing applications. Created and maintained a custom internal npm component library, improving development efficiency. Styled applications with Styled Components and implemented routing with React Router. Customised WordPress websites based on client requirements. Worked directly with clients in agile sprints to gather requirements and deliver production-ready solutions.

Junior React Developer at Agency Software House

May 1, 2022 - May 1, 2023

Implemented UI components and features using React and modern JavaScript. Integrated REST APIs and supported backend development with Node.js. Contributed to shared npm component libraries. Styled applications with Styled Components and supported client WordPress customization.