Cristian – Python, React, AWS

Comprehensive booking reservation system, currently used by car wash businesses, with a perspective of further expansion.

• Led the end-to-end development of the project, taking it from a small proof of concept to a production-ready, advanced MVP;
• Engineered a fully functional front-end application by translating mock-ups into high-quality, production-level code;
• Built a comprehensive internal dashboard for business administration and data oversight;
• Developed a multi-channel notification system (Email/WhatsApp via Twilio) to communicate with clients based on their preferences;
• Architected a complex reservation system with an intelligent matching algorithm that assigns the most suitable worker based on date, time, distance, service zone, available services, and each worker’s booking load;
• Integrated Google Maps API for service zone validation and geolocation features;
• Integrated Stripe as the payment processing solution to support secure transactions;
• Authored a suite of unit tests to ensure reliability and correctness of core logic and components.

A SaaS platform designed to help physical bookstores quickly expand into e-commerce. It supported the full purchasing flow - shopping cart, wishlists, gift cards, and multiple payment methods - while allowing stores to manage both their own catalog and third-party book inventories. The system included robust user account management, an advanced searchable book catalog, content publishing tools for blog posts and event promotions, and features for newsletter subscriptions and discovering nearby bookstores.

• Developed responsive e-commerce frontend components using React and Redux Toolkit for state management;
• Designed and maintained PostgreSQL database schemas for the product catalog, user accounts, and order management;
• Built a responsive checkout flow supporting multiple payment methods;
• Implemented wishlist and gift card management features;
• Built a background task processing system with Celery for automated workflows and email notifications;
• Created comprehensive book search functionality with advanced filtering by author, genre, and publication parameters;
• Implemented secure payment integrations supporting credit cards, bank transfers, and PayPal;
• Optimized database queries to improve catalog browsing and search performance;
• Designed a user account management system and order history functionality;
• Configured CI/CD pipelines using Jenkins for automated testing and deployment to Amazon EC2 instances.

A back-office management system for multiple online bookstores, providing administrators with full control over their e-commerce operations. The platform allowed management of book data, catalogs, curated lists, client information, sales inventory, and performance statistics. It functioned as a secure, admin-only environment with extensive CRUD capabilities - supporting listing, filtering, detailed views, updates, and batch actions across all store configurations and content.

• Developed the front-end application from the ground up; Integrated internationalization (i18n) using the i18next library;
• Implemented role-based access control (RBAC) and user management features;
• Consumed and interacted with a large-scale backend API comprising over 200 endpoints;
• Adapted existing backend endpoints and created new ones to enable comprehensive data model management;
• Maintained a scalable project architecture by cleanly segregating the core e-commerce logic from back-office implementations.

A streaming platform designed to provide users with access to a wide range of movies, series, and documentaries online. The platform emphasizes user-friendly streaming and curated content, enabling seamless access to artistic and cultural media. Its library includes over 23,000 titles, spanning films, series, games, and magazines.

• Helped migrate a legacy MVC project to a scalable RESTful API architecture;
• Collaborated on implementing a redesigned, aesthetically improved frontend;
• Implemented internationalization features using the i18next library;
• Optimized frontend rendering lifecycle for better performance;
• Designed and implemented automated tasks using Celery to gather analytics on platform usage.