Mikołaj Gramowski — Full-Stack Web Developer

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Deltaton is an advanced AI-powered platform designed to support farmers, growers, and agricultural professionals. It offers specialized agents to assist in managing crops, vineyards, greenhouses, or beehives with data-driven decisions. Includes a General Agent for agriculture basics and a Farm Agent for customized expert insights.

ArtBoard is a Polish online marketplace connecting artists with buyers, featuring artist profiles, artwork listings. It’s built with a Next.js 15 frontend and a NestJS + MongoDB backend, with TypeScript.

Project Overview: Sadege (Field Service & Work Order Management App) Sadege is a robust cross-platform mobile application designed to manage field services, maintenance tasks, and work orders. Built with offline-first capabilities, it empowers field workers to track their assignments, update task statuses, and upload necessary documentation whether they are online or operating in remote areas with poor connectivity. The application enforces specific business logic, such as ensuring a worker only has one active work order running at a single time. Once connectivity is restored, the application seamlessly synchronizes background mutations and resolves optimistic UI state updates with the backend server. Features like rich media attachments, real-time geolocation tracking, and native device interactions make it a comprehensive tool for field operations. Key Features Offline-First Architecture: Complete support for local caching and offline mutations. Workers can start, pause, and finalize work orders without an active internet connection. The app queues these actions and synchronizes them with the backend upon network reconnection. Work Order Management: Detailed screens for viewing My Orders, tracking time spent on active tasks, and enforcing business rules (e.g., single active order validation, automatic timestamp calculations). Device Native Integrations: Real-time geolocation tracking, native camera integration for site photos, and extensive file/document picking capabilities. Push Notifications: Firebase Cloud Messaging (FCM) integration for real-time alerts and dispatches. Internationalization: Full i18n support, automatically adapting to the user's localized device context. Secure Storage: Using MMKV and Secure Storage to keep authentication and sensitive company data safe on the device. Tech Stack Core Framework & Language: React Native (v0.74.3) TypeScript for type-safe, maintainable code. State Management & Data Fetching: Zustand for lightweight, scalable global state management. TanStack React Query (v5) combined with Persist Client / Sync Storage Persister for data fetching, caching, and offline-first queue/optimistic updates. Axios for API communication. Navigation: React Navigation (Native Stack) for smooth, native-feeling screen transitions and deep linking. Forms & Validation: React Hook Form combined with Yup for performant, strictly validated forms (e.g., status updates, task finalization). Storage & Database: React Native MMKV: Lightning-fast, synchronous local key-value storage used for persisting the React Query cache and user state. RN Secure Storage: For secure credential management. UI & Animation: React Native Reanimated & React Native Gesture Handler: For buttery smooth 60fps animations and complex gesture interactions. Gorhom Bottom Sheet: For advanced, interactive sliding panels often used in status forms and options menus. Lottie & React Native SVG: For rich, scalable vector graphics and fluid illustrations.

Piana is a comprehensive finance and banking mobile app built with Flutter. It enables users to securely manage accounts, track transactions, set budgets, and access advanced financial analytics. I led the development, integrating Adyen API for seamless payment processing and designing an intuitive, user-friendly interface focused on security and usability.

Created a hybrid iPad app using React Native and a web-based dashboard using React for a 3D printing business. Used Firebase for real-time data sync and authentication. Delivered smooth user flows and a responsive UI tailored for in-factory use. Helped digitize operations and reduce manual input errors.