Marcelina Ziółkiewicz
I am a skilled React/React Native Developer with extensive experience building web and mobile applications.
About
I am a skilled React/React Native Developer with extensive experience building web and mobile applications. Proficient in JavaScript and TypeScript, I value collaboration as well as independence, and I am eager to support others while remaining fully engaged in achieving my own goals.
I’m passionate about programming and enjoy creating my own applications, which allows me to explore new technologies and improve my skills. I also enjoy building LEGO sets, as it lets me unwind and exercise my creativity. I started this job part-time in the summer as a side activity to gain commercial experience in programming.
- 4 years' experience
- Joined August 2025
Languages
- EnglishIntermediate
Industry experience
- Software & Internet
- Transportation & Logistics
Work experience
I have been part of Ścieki's development teams since January 2022, engaging in full-stack development including writing backend code in Django since December 2023. I worked on entire systems for sewage truck drivers such as Senizacja.Online and Szambo.online. I developed mobile apps using React Native, Tanstack Query, RN-Paper, Detox, Firebase, Vision-Camera, Redux, and Zustand. On the frontend, I used React, Redux, Redux Saga, and React Query. Backend work involved Django, DRF, Docker, and Bootstrap.
I worked on an app for ordering food called 'BookFood', adding new features to several mobile applications developed in React Native. I wrote code primarily in TypeScript and JavaScript.
Education
Certifications and awards
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