Rentijer is not just another tool for landlords; it is a high-performance SaaS platform (Property Management System) designed to solve specific administrative challenges in the tourism market. Using Next.js 16, Bun, and Supabase, we built a system that automates critical processes such as guest registrations (eVisitor), document scanning, and real-time calendar synchronization. The result is a product that provides a native mobile experience without the need for app downloads, eliminating bureaucracy from the landlord's daily routine.
The Challenge: Technical Debt and Administrative Congestion
Property owners face a unique set of problems that traditional global PMS systems do not adequately solve:
Data Fragmentation: Manually syncing calendars from platforms like Airbnb, Booking.com, and Vrbo often leads to "double-bookings."
Bureaucratic Pressure: The legal obligation to register guests in state systems within 24 hours creates immense pressure, especially during late arrivals.
Tax Complexity: Calculating VAT on foreign platform commissions and tracking tourist fees often requires professional accounting assistance.
Legacy Solutions: Existing software is often slow, visually cluttered, and poorly optimized for mobile devices, which is critical for owners constantly on the move.
The project's goal was to develop a platform that is technically superior (speed, security, scalability) but user-invisible (ease of use in three clicks).
The Solution: The Future of the Web through Next.js 16 and PPR
To develop Rentijer, we chose a cutting-edge technology stack that allows for maximum development speed and top-tier performance. Using the Bun runtime, we achieved incredibly fast server function execution, while Next.js 16 enabled the implementation of Partial Prerendering (PPR).
PPR allowed us to deliver static parts of the interface (like navigation and layout) instantly, while dynamic data (like active bookings) is streamed from Edge servers directly into components. This eliminated traditional "loading" screens and achieved a zero-latency feel.
1. Unified Calendar: A Centralized Operating System
Instead of constantly switching between different screens, Rentijer offers a single "Single Source of Truth."
Engineering Execution: We implemented an advanced synchronization system based on the library. periodically refresh data from all platforms, converting conflicting formats into a single unified object.
