Full Stack Software Engineer

I am a Full Stack Software Engineer with nearly five years of experience building modern web applications with TypeScript, React, Next.js, Node.js, and PostgreSQL. My work has a strong frontend product focus while covering the complete delivery lifecycle from discovery and technical design to implementation, debugging, and deployment.

I independently deliver functional full-stack solutions, creating responsive React interfaces, integrating APIs, designing data flows, and maintaining clear system boundaries. I prioritize reusable components, understandable UI states, maintainable architecture, and production performance.

I have worked on secure authentication systems, including PKCE-based cross-application login flows for web-to-desktop integrations. I also build payment and billing functionality, including Stripe-based recurring subscriptions, AI credit tracking, usage balances, and webhook-driven workflows.

My integration experience includes e-commerce and ERP synchronization, MedusaJS product catalog design, Payload CMS implementations, and social-media data imports from Instagram, Facebook, and YouTube. I have also developed on-demand analytics workflows using live API data.

I regularly collaborate directly with clients to clarify requirements, define API contracts, evaluate technical trade-offs, and translate complex needs into practical implementation plans. I work remotely and am fluent in English and native in Polish.