Adam Mika

About Me

Results-driven Frontend Developer with 8+ years of experience delivering high-performance, scalable web applications in financial services, SaaS, and e-commerce industries using React, Next.js, and TypeScript. Expert in designing and implementing reusable component libraries, optimizing rendering with SSR, SSG, and ISR, and ensuring robust state management with Redux Toolkit and React Query.

Work Experience

Senior Software Engineer

Capgemini • Warsaw, Poland • Jan 2025 - Nov 2025

• Developed scalable micro-frontend experiences for American Express using TypeScript, React, and Next.js
• Enhanced UI reliability with React Testing Library, Jest, and MSW, reducing regressions
• Integrated AI-powered insights from OpenAI GPT-4.0 and Anthropic Claude 3.5 into UI components

Senior Frontend Developer

Goose • United States (Remote) • Aug 2021 - Dec 2024

• Built scalable frontend foundations with reusable TypeScript, React, and Next.js components
• Delivered high-performance features using React Query, SWR, and Zustand
• Achieved 85%+ test coverage using React Testing Library and Jest

Frontend Developer

Remedy Product Studio • Minsk, Belarus (Remote) • Mar 2018 - Jun 2021

• Established scalable frontend environment using Docker, TypeScript, and React
• Optimized state and data flows using Redux Toolkit, React Apollo, and GraphQL
• Achieved 85%+ automated test coverage ensuring stable feature delivery

Frontend Developer

Wevedo • London, UK (Remote) • Aug 2017 - Feb 2018

• Developed responsive web applications using React, JavaScript, and React Bootstrap
• Implemented multilingual support with i18next and robust form handling