Marcin Wydra - Portfolio

Worked on a larger React app for consultant management: dashboards, filtering, forms, and robust UI patterns for internal operations.

Contributed to a medical-industry platform. Due to NDA, I can describe only the engineering scope: building UI features, ensuring high quality, and meeting strict reliability and security requirements for healthcare software used at global scale.

Machine-learning app helping salespeople discover new contacts and accelerate sales. I delivered both frontend and backend features, focusing on performance and a smooth UX.

Built an internal platform (largely from scratch) for tracking employee skills and preferences, improving project staffing and professional development.

A customizable editor for building complex React forms used by both developers and business stakeholders. Focus: fast prototyping, strong typing, and predictable state handling.

Chess platform with a focus on performance and accessibility for low-bandwidth environments. I improved UI flows and app responsiveness.

React Native app for club management: ordering drinks, payments, and ticket sales. I delivered UI features and supported the API integration.

Mortgage/borrowing capacity app: delivered live credit form flows and improved UI reliability for a fully-online financing journey.

Vue + TypeScript frontend for a major FMCG brand in Poland, powered by a Django/Python backend. Focus: a stable, content-driven customer-facing front page.

Short optimization sprint after codebase audit: refactoring and performance improvements in a production React/Meteor app.

Internal corporate chat platform (Meteor + Blaze + AWS). I shipped new features and improved stability in day-to-day business usage.

Open-source contribution focused on TypeScript typings and developer experience for a forms toolkit.

Led practical classes in HTML, CSS, JavaScript, and React. Built lesson plans, mentored students, I raise 10 junior developers. Delivered a small web app with students as a capstone project.

Built and maintained high-traffic job board features: search UX, listings, SEO-friendly pages, and reusable UI building blocks.

Implemented and refined time tracking flows used by employees and contractors, including validations, edge cases, and stable UI patterns.

Maintained a component library and patterns to keep product UX consistent. Focus: API design, accessibility, documentation, and adoption across teams.

Vacation management app with time logging and Google Calendar integration. I shipped UI features, improved performance, and supported deployment workflows.

Internal product for managing team CVs: custom CV creation, centralized hub, and analytics. I focused on performance and feature delivery in a reactive stack.

Two parallel streams: end-user documentation in Docusaurus + a major Meteor upgrade (heavy breaking changes). My toughest project: upgrading the framework, auditing code, fixing performance, and stabilizing production.

A fully reactive audit form for lift auditors, engineers, and the sales team, accompanied by a reporting module and a pricing engine. Focused on fast data entry and reliable data flow across the app.

Company website built with Next.js + Sanity. I focused on UI modules, SEO, performance, and reusable patterns for content-driven pages.

EdTech mobile app helping refugees and immigrants integrate in the US. I built a core messenger feature: groups, roles, permissions, reactions, quoting, and link detection.

3D furniture configurator integrated with Shopify. I delivered frontend UX/UI tied to 3D logic, ensured responsive performance on web/mobile, and prepared the base for future AI integrations.

Full-stack platform supporting the legal asset servicing lifecycle: onboarding, contract management, invoicing, funding allocation, and audit-ready reporting. I implement features end-to-end, from UI to backend services and data.

AI-assisted tool to evaluate delivery process via a survey and generate actionable recommendations. I contributed to the app stack, auth, forms, and data flows.

Designed and implemented a Notion-like UX pattern to significantly improve workflows in a client app: better navigation, editing experience, and component structure.