Available to hire
I’m Adam Mika, a frontend developer based in Wrocław, Poland. I’ve spent 8+ years delivering high-performance, scalable web applications for financial services, SaaS, and e-commerce using React, Next.js, and TypeScript.
I design reusable component libraries, optimize rendering with SSR/SSG/ISR, and ensure robust state management with Redux Toolkit and React Query. I’m passionate about UI reliability, accessibility, and user experience, and I enjoy turning complex requirements into polished, cloud-enabled frontend solutions.
Skills
Work Experience
Senior Software Engineer at Capgemini
January 1, 2025 - November 1, 2025Developed scalable micro-frontend experiences for the American Express project by building reusable UI modules with TypeScript, React, and Next.js, improving frontend performance, modularity, and architecture across distributed applications. Enhanced UI reliability by implementing automated testing using React Testing Library, Jest, and MSW, reducing regressions. Delivered performant and accessible interfaces by applying advanced React patterns (Hooks, Custom Hooks, Suspense, Error Boundaries) and leveraging Next.js SSR/SSG/ISR for rendering and SEO. Integrated design system standards to ensure visual consistency and reduce fragmentation. Improved visuals with Tailwind CSS, Bootstrap, and Material UI; integrated AI-powered insights from OpenAI GPT-4.0 and Claude 3.5 into UI components. Created reusable component libraries and enforced coding standards.
Senior Frontend Developer at Goose
August 1, 2021 - December 1, 2024Built scalable frontend foundations with reusable TypeScript, React, and Next.js components; delivered high-performance, data-driven features using React Query, SWR, and Zustand. Applied advanced React patterns (Hooks, Custom Hooks, Context API, Suspense, Error Boundaries); leveraged Next.js Server Components and Client Components to streamline rendering and modernize architecture. Improved routing, scalability, and SEO via Next.js App Router, SSR, SSG, and ISR; implemented Dynamic Imports, Code Splitting, and lazy-loading for performance. Ensured responsive, accessible UI with Tailwind CSS and Figma; implemented robust validation with Formik and Yup. Built reliable state/data flows with Redux Toolkit, RTK Query, and modular slice patterns; achieved 85%+ test coverage.
Frontend Developer at Remedy Product Studio
March 1, 2018 - June 1, 2021Established scalable frontend environment using Docker, TypeScript, and React; developed reusable components and Custom Hooks; standardized patterns across multiple micro-frontends. Achieved 85%+ automated test coverage with React Testing Library and Jest. Optimized state/data flows with Redux Toolkit, React Apollo, and GraphQL; delivered responsive and accessible UIs using Emotion CSS and Figma. Applied advanced patterns (Hooks, Suspense, Error Boundaries) and contributed to scalable frontend architecture with modern tooling; created reusable component libraries and modular frontend practices.
Frontend Developer at Wevedo
August 1, 2017 - February 1, 2018Developed responsive web features using React, JavaScript, and React Bootstrap; styled/reused components with SCSS and React Bootstrap for consistent UI across pages. Implemented multilingual support with i18next and robust form handling. Integrated frontend with backend APIs for smooth data flow and real-time updates, ensuring accessibility and responsiveness.
Education
Master of Computer Science at University of Amsterdam
January 11, 2030 - June 1, 2017Bachelor of Computer Science at University of Amsterdam
January 11, 2030 - July 1, 2015Master of Computer Science (cum laude) at University of Amsterdam
January 11, 2030 - June 1, 2017Bachelor of Computer Science at University of Amsterdam
January 11, 2030 - July 1, 2015Qualifications
Industry Experience
Software & Internet, Financial Services, Retail, Professional Services
Skills
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