- Developing and maintaining front-end application architecture using React and Next.js (SPA, PWA, SSR, Static HTML Export) for various projects, including industries like fintech and HR- Collaborating closely with the back-end team to integrate the front-end application with the server using RESTful API ensuring smooth data exchange and optimal performance- Providing training, mentorship, and code reviews for junior programmers, helping them improve their coding skills and understanding of best practices- Working with graphic UX/UI designers using tools like Adobe XD and Figma to ensure visual consistency of the application with graphical projects, following style guides, and implementing responsive designs for various screen resolutions and devices- Analyzing, monitoring, and optimizing application performance using tools such as Google Lighthouse and Chrome DevTools, addressing bottlenecks and improving user experience- Actively participating in the creation and continuous improvement of development processes within the company, promoting Agile methodologies including Scrum- Designing and implementing a comprehensive testing strategy, including unit, integration, and automated e2e tests using Jest and Cypress to ensure robust test coverage, minimize regressions, and improve product reliability while reducing manual testing efforts

- Designing and implementing robust front-end application architectures, utilizing framework such as Angular for projects in Cryptocurrency industry- Building integrations between front-end applications and back-end servers using RESTful APIs, collaborating closely with back-end teams to ensure optimal performance and efficient data exchange- Ensuring visual consistency and high-quality user experience by working closely with graphic designers and UX/UI specialists, leveraging tools like Adobe XD and Figma, and implementing responsive designs for various screen resolutions and devices- Analyzing business requirements, translating them into efficient software solutions, and actively participating in the planning and design phases to ensure alignment with project goals and stakeholder expectations- Promoting best coding practices within the team, actively promoting clean and maintainable code, contributing to the establishment of coding standards, and providing thorough peer code reviews to improve overall code quality- Thriving in an Agile environment as a valuable member of a multi-disciplinary, self-managing team, effectively collaborating with various roles such as developers, designers, product managers, QAs to deliver successful projects

- Developing and executing front-end application infrastructures, employing frameworks like Angular for projects within the cryptocurrency, online gambling, and fintech sector- Collaborating closely with back-end teams to seamlessly integrate front-end applications with server-side technologies, ensuring efficient data exchange and optimal performance- Collaborating with graphic designers and UX/UI specialists to guarantee visual coherence and adherence to design principles, resulting in a cohesive and engaging user experience across applications- Ensuring application responsiveness and compatibility across different browsers and devices, implementing best practices for cross-platform and cross-browser support- Actively participating in code reviews, promoting clean and maintainable code, and sharing best practices with team members to improve overall code quality and team efficiency

- Developing and maintaining a variety of web pages using JavaScript, HTML5, CSS3, and WordPress, showcasing versatility and expertise in modern web technologies- Taking ownership of website maintenance and administration, ensuring smooth operation, up-to-date content, and prompt resolution of issues to minimize downtime- Designing and implementing engaging landing pages for various departments, including Marketing, Sales, and HR, to support their goals and drive user interaction- Demonstrating responsibility for the visual aspects of the company's digital presence, continuously refining and enhancing its image to create a compelling and consistent brand identity

- Creating proficiently numerous web pages for both Polish and international clients, utilizing JavaScript, HTML5, CSS3, and PHP technologies to deliver visually appealing and fully functional websites tailored to their specific needs- Designing a diverse portfolio of over 60 distinctive logos for companies across various industries, demonstrating creativity, adaptability, and a keen understanding of branding and visual identity principles- Producing an extensive array of more than 300 graphic design projects, including banners, offer templates, and presentations, showcasing a strong ability to create compelling visuals that effectively communicate and engage target audiences