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Hi, I’m Tymon Kowalski, a frontend-focused Senior Software Engineer with over 10 years of experience delivering scalable, high-performance web applications. I specialize in React-based ecosystems, modern frontend architectures, and design-system-driven development, always balancing user experience with solid backend collaboration. I’m known for ownership, clean UI engineering, and performance optimization, as well as mentoring engineers to deliver maintainable, business-aligned products. I enjoy partnering with product and design teams to turn complex requirements into delightful, accessible UI across enterprise, e-commerce, and cloud-enabled environments.…Hi, I’m Tymon Kowalski, a frontend-focused Senior Software Engineer with over 10 years of experience delivering scalable, high-performance web applications. I specialize in React-based ecosystems, modern frontend architectures, and design-system-driven development, always balancing user experience with solid backend collaboration. I’m known for ownership, clean UI engineering, and performance optimization, as well as mentoring engineers to deliver maintainable, business-aligned products. I enjoy partnering with product and design teams to turn complex requirements into delightful, accessible UI across enterprise, e-commerce, and cloud-enabled environments.

Tymon Kowalski

Front-End Developer, Web Developer, Full Stack Developer, +2

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Hi, I’m Tymon Kowalski, a frontend-focused Senior Software Engineer with over 10 years of experience delivering scalable, high-performance web applications. I specialize in React-based ecosystems, modern frontend architectures, and design-system-driven development, always balancing user experience with solid backend collaboration. I’m known for ownership, clean UI engineering, and performance optimization, as well as mentoring engineers to deliver maintainable, business-aligned products. I enjoy partnering with product and design teams to turn complex requirements into delightful, accessible UI across enterprise, e-commerce, and cloud-enabled environments.…Hi, I’m Tymon Kowalski, a frontend-focused Senior Software Engineer with over 10 years of experience delivering scalable, high-performance web applications. I specialize in React-based ecosystems, modern frontend architectures, and design-system-driven development, always balancing user experience with solid backend collaboration. I’m known for ownership, clean UI engineering, and performance optimization, as well as mentoring engineers to deliver maintainable, business-aligned products. I enjoy partnering with product and design teams to turn complex requirements into delightful, accessible UI across enterprise, e-commerce, and cloud-enabled environments.

Available to hire

Hi, I’m Tymon Kowalski, a frontend-focused Senior Software Engineer with over 10 years of experience delivering scalable, high-performance web applications. I specialize in React-based ecosystems, modern frontend architectures, and design-system-driven development, always balancing user experience with solid backend collaboration.

I’m known for ownership, clean UI engineering, and performance optimization, as well as mentoring engineers to deliver maintainable, business-aligned products. I enjoy partnering with product and design teams to turn complex requirements into delightful, accessible UI across enterprise, e-commerce, and cloud-enabled environments.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Work Experience

Senior Software Engineer at CGI

April 1, 2024 - Present

Led the frontend architecture of enterprise-scale web applications using React, TypeScript, and micro-frontend patterns, enabling independent team deployments and faster release cycles. Designed and implemented a shared design system and component library to reduce UI inconsistencies and improve development velocity. Optimized frontend performance through code-splitting, lazy loading, and rendering improvements, enhancing Core Web Vitals. Collaborated with UX designers, product owners, and backend engineers to translate complex requirements into scalable UI solutions. Integrated frontend with REST and GraphQL APIs, ensuring secure data flows. Introduced accessibility standards and automated UI testing practices to improve quality and compliance. Mentored junior and mid-level engineers and acted as a technical owner for frontend decisions. Worked with DevOps to streamline CI/CD pipelines for frontend deployments on cloud platforms.

Full Stack Engineer at Delivery Hero

May 1, 2021 - February 1, 2024

Built and maintained high-traffic customer-facing applications with a strong frontend emphasis using React, TypeScript, and modern state management. Delivered responsive, mobile-first UI solutions supporting millions of users across international markets. Collaborated on frontend performance tuning and bundle optimization to sustain fast load times under peak traffic. Built reusable UI components aligned with product branding and usability standards. Integrated frontend features with backend services via REST APIs and event-driven architectures. Participated in feature planning, estimation, and cross-team alignment. Improved frontend reliability through automated testing and CI integration. Supported gradual migration from legacy frontend solutions to modern React-based architectures.

Software Engineer at Infosys

March 1, 2018 - March 1, 2020

Developed enterprise web applications with a focus on frontend development using JavaScript, React, and HTML/CSS. Translated complex business requirements into intuitive user interfaces for global clients. Collaborated with senior engineers to improve frontend architecture and code quality. Implemented reusable UI patterns to accelerate feature development. Integrated frontend modules with Java-based backend systems. Supported production deployments and resolved UI-related defects. Gained experience working within large-scale, distributed engineering teams and improved application usability through UI refinements.

Software Engineer at Sony

March 1, 2015 - July 1, 2017

Contributed to the development of internal and consumer-facing web applications with a frontend-centric role. Built interactive UI components using JavaScript, HTML5, and CSS3. Collaborated with designers to ensure visual consistency and usability and supported modernization of legacy UI codebases. Assisted in frontend testing and debugging across browsers and devices. Participated in code reviews and knowledge-sharing sessions and helped document frontend standards and workflows. Delivered features in collaboration with cross-functional teams to improve UI stability and maintainability.