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Mateusz Miszczak

Experience

Experience

My growth across client websites, CMS-driven marketing pages and production fintech applications.

Frontend Engineer
Fintech Experience
Performance Focused
CMS & Landing Pages

Growth Timeline

2023
01

Freelance and commercial websites

I started by building responsive websites for clients and agencies, including marketing pages, photography portfolios, interactive visualizations and data tools. This stage helped me develop a strong eye for layout, performance, responsive design and client-facing web experiences.

2025
02

Production fintech applications

I joined a production fintech environment as a Junior Frontend Developer. Over time, I started taking on more complex features: trading interfaces, wallet views, withdrawal flows, admin systems, client onboarding and data synchronization through WebSockets.

2026
03

Increased ownership and web platform scope

I developed larger frontend modules involving multi-step business flows, realtime UI, API integrations, refactoring, component standardization and shared packages for CMS-driven marketing applications.

Areas of responsibility

What I work on

Key areas I contributed to across the fintech product and CMS-driven web projects.

Product features

The core user-facing areas: trading interfaces with live asset data, withdrawal flows, tax document management, and admin systems covering user lifecycle and client onboarding.

Platform and tooling

Infrastructure work beyond features: shared frontend packages across the monorepo, cookie consent with consent-based analytics loading, and Next.js performance optimizations.

Marketing websites

Multilingual Next.js websites with CMS-driven content, responsive landing sections, reusable shared packages and production-ready delivery.

AI-assisted workflow

I use AI tools like Claude and Codex as part of my daily workflow, for code generation, refactoring, debugging and exploring solutions faster. Decisions and final code quality are always mine.

Technical focus

Technical focus

Technologies and practices I use to build reliable, performant and scalable frontend applications.

Frontend
React
Next.js
TypeScript
State & Data
Redux Toolkit
React Query
GraphQL
REST
UI & Styling
Tailwind CSS
Framer Motion
Material UI
Figma
Realtime
WebSockets
State Sync
Forms
Zod
React Hook Form
Tooling
Turborepo
Strapi
Vitest
Web quality
SEO
Accessibility
Core Web Vitals
Analytics
Responsive Design
Experience | Mateusz Miszczak