Freelancer profile translated to English.
Back to original languageAbout Bartek
I design and build Web & Mobile ecosystems, from Figma mockups to deployment.
My expertise lies in building B2B and Greentech platforms. I notably led the complete construction of a B2B audit platform (Next.js/Supabase). This involved UX/UI design (5-step wizard, intern/trainer interfaces) and the creation of an intelligent evaluation engine (+870 business rules) calculating scores via PostgreSQL RPC functions.
Concurrently, I architected a Greentech platform (Next.js, tRPC, Monorepo) with dual Stripe billing (subscriptions + one-time payments), a points-based economy system with expiration, and an advanced admin dashboard (data visualization, content management).
My experience also covers the development of high-traffic mobile applications. I participated in the development of the official Dour Festival application (React Native/Expo), serving thousands of festival-goers, with Spotify API integration and personalized schedule creation.
I also contributed to the Appetito ecosystem, developing the B2B dashboard (Next.js) with its interactive delivery zone modules (Leaflet), and the B2C application (React Native) with its checkout funnel. My design expertise was also applied to sensitive projects, such as the UX/UI design (Figma) and development of a cyberbullying app (CFWB) with real-time secure chat and biometric authentication.
Outside of tech, my passions for photography (attention to detail) and weightlifting (discipline) strengthen my ability to complete complex projects.
My Specialties:
☁️ Full-stack: Supabase, Next.js 15, tRPC, TypeScript, React 19
📱 Mobile: React Native, Expo, RTK Query
🎨 Design: Product Design (UX/UI), Prototyping (Figma)
🏛️ Architecture: Software Architecture, RLS, Monorepo, Project Management
French
Native or bilingual
English
Conversational
Polish
Native or bilingual
Can work on-site
Bruxelles (up to 50km), Mouscron (up to 10km), Tournai (up to 10km), Ohain (up to 10km)
Experience
- sparkle.techFront-end DeveloperApril 2023 - Today (3 years and 2 months)As a Front-end Developer, I participated in the development of web and mobile applications for various clients.► Project: Dour Festival (Mobile Application)Development of the application (React Native/Expo), serving thousands of festival-goers during the event.Technical architecture (RTK Query, Lingui) and integration of the Spotify API for official playlists.Key features: interactive schedule (filters by stages/days), favorite artists management. Setup of the EAS Build infrastructure.► Project: Appetito (Delivery Ecosystem)[Web Dashboard - Next.js]: Development of the B2B dashboard (MUI, Redux Toolkit). Development of business features: menu management system (products, options, image upload) and interactive delivery zone module (Leaflet).[Mobile App - React Native]: Development of the B2C app. Implementation of the complete cart system (dynamic fee calculation), checkout funnel, and management of 2 APIs (legacy + v2).► Project: CFWB CyberAide (Cyberbullying Application) ReactNative/ExpoUX/UI design (Figma) and development of the secure and sensitive application. Real-time secure chat between students and professionals, and reporting case management system. Security architecture (biometric authentication, JWT management).► Other notable contributions:Expo update on the HuggyMed teleconsultation app (React Native).Participation in the development of the Formidable Dashboard interface (React 19, TanStack Router).Reconstruction of the Appetito Box B2B app (React Native, TanStack Query, NativeWind).
- WexibleFull-stack Architect (Consultant)June 2022 - Today (4 years)As a Full-stack Architect & Product Designer (freelance), I lead the end-to-end design and development of digital platforms, from conception to backend architecture (Supabase) and deployment (Web & Mobile).► Project: Make the CHANGE (Greentech Platform) (In Progress)Architecture of a full-stack ecosystem (Next.js 16, Supabase, tRPC) in a monorepo (Turborepo), including a points-based economy system (with expiration) and dual Stripe billing (subscriptions + one-time payments).Web platform (Next.js): a rewards marketplace, an environmental impact calculator, an interactive map (Leaflet) of projects, and internationalization management (next-intl).Admin dashboard: content management system (blog, producer stories), order management, and data visualization module (Tremor).Mobile application (React Native/Expo): native payment funnel (Apple/Google Pay), gamification system (badges, levels), and geolocation.► Project: Sextant Consulting (Skills Audit Platform) (Completed Project)Led the complete construction of the B2B platform (Next.js/Supabase).UX/UI design of the audit process, including a 5-step wizard for trainers and distinct evaluation interfaces for trainees, with light/dark theme.Creation of an intelligent evaluation engine (+870 business rules) calculating scores via PostgreSQL RPC functions and generating personalized recommendations.Implementation of advanced features: management of a comprehensive skills repository, multi-client management (secured by RLS), automatic PDF report export, and an accessible design system (dark/light/responsive theme).End-to-end testing strategy (Playwright) to validate all workflows (admin, trainee) and navigation.
- DigitaluFront-end Developer (Web & Mobile)January 2021 - December 2021 (11 months)Responsible for the development and maintenance of a portfolio of 9 applications (7 web in React/Next.js and 2 mobile in React Native/Expo).• Design and creation of internal reusable UI component libraries to standardize and accelerate development. • Participation in sprint organization and task tracking via Notion and Airtable.
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Education
- Full Stack Web Development & UX/UI DesignBeCode.org2020Programme intensif de 6 mois axé sur le développement full-stack (client et serveur). L'accent a été mis sur l'acquisition de méthodes de travail professionnelles : gestion de projet en méthode Agile, autonomie et leadership technique.