Mateusz
Miszczak
Frontend engineer with production experience in fintech applications and CMS-driven websites. I build React/Next.js interfaces with a focus on clean UX and production-ready delivery.
Completed frontend tasks across production apps
Ongoing delivery across multiple application areas
Realtime UI synchronization and state-driven interfaces
Multilingual pages, analytics and reusable content sections
Case Studies
Selected work
Key production areas I worked on, across fintech applications and CMS-driven websites.
Technical Focus
Technical focus
The technologies, patterns and tools I use every day.
Frontend Architecture
Component-driven React and Next.js apps with TypeScript, App Router and scalable module structure.
Data and State
Redux Toolkit for UI state, React Query for server data, REST and GraphQL API integrations.
Realtime Systems
Event-driven interfaces and state synchronization using WebSockets.
UI, CMS and delivery
Responsive layouts, CMS-managed content, analytics, SEO basics and production-ready pages.
My Journey
From freelance work to production fintech
I started with client websites, photography portfolios and data tools, then moved into a production fintech team where I built trading interfaces, wallet views, withdrawal flows, admin systems and realtime UI driven by WebSockets.
Freelance and commercial projects
Responsive websites for clients and agencies, including marketing sites, photography portfolios and data tools.
Production fintech applications
Trading interfaces, wallet views, withdrawal flows, admin systems and WebSocket data synchronization.
Growing ownership
Owning larger features end-to-end: multi-step flows, realtime UI and API integrations.