A production B2C flight and hotel booking platform where I owned almost the entire frontend. I built the core search, booking, payment, filtering, sorting, and PWA flows, while reviewing and integrating occasional contributions from other developers. Flight results arrived incrementally from multiple providers. Instead of making users wait for every provider to finish, I proposed sending available results to the frontend over WebSocket as they arrived. The client accumulated the results and handled filtering, sorting, pagination, and infinite scrolling. Some searches returned more than 500 detailed flight results, so rendering everything at once could freeze the interface. I introduced chunked result handling and controlled rendering to keep the UI responsive while new results continued arriving.

A payments platform with merchant and internal staff interfaces. I led the frontend structure within a five-person frontend team, reviewed implementations, guided corrections, and merged team contributions. Because payment integration work was more sensitive, I handled the frontend side of the payment gateways directly, including Stripe, regional and local gateways, bank-specific gateways, and cryptocurrency flows.

A service and warranty management system I designed and built independently across the frontend, backend, and database. I handled the database schema, API routes, business logic, authentication, user interface, and printable invoices. The application also connected to the company's existing inventory and warranty software through a web service. It retrieved available parts, stored warranty requests locally, submitted them to the internal system, and kept the returned external reference so records remained linked across both systems.

An industrial website with a custom engineering calculator for steel grating configuration and load evaluation. The backend supported multiple grating configurations, custom concentrated and distributed loads, and predefined vehicle/load classes. It validated compatible dimensions, calculated standard and galvanized grating weight, evaluated stress and deflection, and returned whether the selected configuration stayed within the implemented allowable limits.

A restaurant ordering and operations ecosystem covering customer ordering, restaurant management, and administration. I worked as part of a five-person frontend team, with developers owning different areas of the product. One operational challenge was automatic printing of narrow restaurant and kitchen tickets. Normal browser printing required confirmation, which did not work for an automatic order workflow. The team designed a local print bridge where a companion Electron application ran on the restaurant computer and exposed a local API. The web frontend sent print jobs to that service, which handled printing without the browser print dialog.

An image-annotation application used to prepare labeled visual data for AI models. Clients uploaded video, backend processing converted it into image frames, and annotators used the application to label those frames. My main contribution was substantial work on the Project Manager interface, including a major UI redesign and restructuring of how annotation projects and frame-based work were presented and managed.