Yaroslav
Ostapenko
Junior Frontend Developer. Ambitious 18-year-old programmer building modern web solutions.
About me
Get to know me better
I am an ambitious and motivated 18-year-old programmer from Ukraine, currently in my third year of a technical high school. I have solid knowledge of web technologies and practical experience as a Junior Frontend Developer, gained during my professional internship.
My main goal is to further develop my skills while working on innovative projects under the guidance of experienced specialists. I am characterized by a desire for continuous improvement and the ability to work in a team.
Location
Krakow, Lesser Poland
Languages
Polish (C1), English (B2)
Status
Student / Intern
What do I do?
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Creating responsive web pages (RWD) using HTML5, CSS3, JavaScript.
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Performance optimization, Clean Code, and SEO.
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Designing and implementing MySQL relational databases.
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Collaborating in a team on innovative web solutions.
Skills
Technologies and tools I work with
Programming Languages
Technical Knowledge & Concepts
Libraries and Frameworks
Tools
Foreign Languages
Projects
Selected works I have worked on
E-Commerce System
Comprehensive sales platform with an admin panel, shopping cart, and order management system.
Developer Portfolio
Modern business card website (like this one), optimized for SEO and performance.
Weather Dashboard
Application using an external API to display real-time weather forecasts.
Task Manager
Interactive To-Do list with categorization capabilities and browser state saving.
Commercial Projects
Examples of websites developed at AKTRU sp. z o.o. for the company's clients, on which I worked.
Kurowski Pol-Agro
Professional corporate website created during an internship. I was responsible for front-end implementation, performance optimization, and adaptation to RWD standards.
Experience and Education
My professional development path
Mobile Informant
24.11.2025 - Present- Safety and technique: Regular patrols of the station and platforms, reporting unattended baggage to Railway Security/protection, and infrastructure failures (e.g., escalators) to technical service.
- Passenger information: Providing detailed information on timetables, delays, platforms, replacement transport, and journey planning (connections, transfers).
- Topography and navigation: Directing travelers to ticket offices, carrier offices (PKP IC, Koleje Małopolskie), ticket machines, luggage storage, public transport, and taxis.
- Support and procedures: Assistance with ticket exchange, handling situations with lost luggage (contact with Info Station/helpline), and instructions on how to proceed in case of canceled trains.
Junior Frontend Developer (Intern)
October 2025 - Present- Creating modern websites for the company's clients.
- Performance optimization: improving loading speed, maintaining Clean Code, and achieving 100/100 scores in Google Lighthouse.
- Code validation and quality: working with validators, removing technical errors (0 errors in code), and security audits (Security A+).
- Multilingual implementations: adapting services to 25 language versions with full localization.
Programmer Technician
04.09.2023 - Present- Profile: Programmer
- Learning advanced web technologies.
General High School
2022 - 2025- Online teaching. General profile with an emphasis on exact sciences.
Certificates
Confirmed competencies and courses
Google AI Essentials
Certificate confirming skills in using artificial intelligence tools to increase productivity and create content.
View CertificateContact
Interested in working together? Write to me.
Let's talk about projects
I am looking for development opportunities as a Junior Frontend Developer. If you have questions about my experience or want to discuss potential cooperation, I am at your disposal.