
Damian Obajtek
@damianobajtek
Fullstack Software Engineer at SELLEO building end-to-end platform features across React, Rails, and NestJS.
What I'm looking for
At SELLEO EdTech & HRTech Software Development, I work across frontend and backend on an internal platform, delivering features with React and TypeScript alongside Rails services and Node.js/NestJS APIs. My work includes dashboards, reporting, data visualization, and document generation.
Previously at SELLEO, I contributed to a long-term production social and events platform for a US client across React Native mobile apps and React/Next.js web apps. I delivered features end-to-end, including events, groups, chat, maps, and registration flows, and worked on ongoing improvements to stability, performance, and user experience.
Earlier, I contributed to a React-based food delivery e-commerce platform at Aexol and taught programming at Giganci Programowania. I’m currently open to opportunities where I can contribute to meaningful products, collaborate with strong teams, and keep growing as a front-end/mobile developer.
Experience
Work history, roles, and key accomplishments
Working across frontend and backend development on an internal platform, delivering features across React/TypeScript applications, Rails services, and Node.js/NestJS APIs.
My work includes:
- Building end-to-end features spanning frontend, backend, persistence, and business logic
- Developing dashboards, reporting, data visualization, and document generation (PDF/DOCX)
- Working with React, TypeS
For nearly five years, I worked on a long-term production social and events platform for a US client, contributing across both mobile and web applications built with React Native, Expo, React, and Next.js.
I owned and delivered features end-to-end, from understanding product requirements and edge cases to implementation, testing, production release, and ongoing improvements.
My work included:
-
Worked as a programming instructor at Giganci Programowania, one of the largest coding schools for children and teenagers in Poland. Taught multiple student groups in C#, HTML, CSS, and basic JavaScript, introducing programming concepts in a practical and accessible way. Also supported new instructors in preparing for their first classes and contributed to reviewing and improving course materials
As a Junior Front-End Developer, I contributed to the development of a React-based e-commerce platform focused on food delivery.
My responsibilities included building and maintaining user-facing components using TypeScript, React, and GraphQL, as well as collaborating with designers and backend developers to deliver a smooth and responsive user experience.
Worked as Junior Frontend Developer at Euvic.
I helped with CSS and basic of Angular in ArtSaas Project.
It was my optional holiday internship. I created React application with E2E tests in Cypress and CI / CD integration.
I was responsible for creating and maintaining the tests in Selenium C#.
Education
Degrees, certifications, and relevant coursework
Akademia Techniczno-Humanistyczna w Bielsku-Białej
Master's degree, Computer Science
2021 - 2023
Thesis topic:
"Comparative analysis of multiplatform applications using React and React Native"
Akademia Techniczno-Humanistyczna w Bielsku-Białej
Inżynier (Inż.), Computer Science
2017 - 2021
Thesis topic - “Content Management System Using GraphQL.”
The technology stack used in the thesis included: Node.js, React, GraphQL, Apollo Client, Apollo Server, Hasura, and Cypress.
Swansea University
Bachelor's degree, Informatyka
2017 - 2017
Uniwersytet Jagielloński w Krakowie
Licencjat (Lic.), Informatyka
2015 - 2017
IELTS Official
The International English Language Testing System (Academic)
May 2017 · Expired May 2019
Availability
Location
Authorized to work in
Salary expectations
Social media
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