Case study · Our own product
Relixio — fleet management, engineered end to end.
A cloud platform that replaces spreadsheets and paper travel orders for companies that run vehicles. Designed, built and maintained entirely by Bdot.
The challenge
One question nobody could answer
Companies with a vehicle fleet juggle an enormous amount of paperwork: registrations, insurance, service intervals, tires, travel orders, fuel receipts and invoices. In most firms it lives in spreadsheets and binders, which means nobody can answer a simple question — what does each vehicle actually cost us? — without days of manual work.
Relixio was conceived to put all of it in one place: a system simple enough for a driver to use on a phone, and rigorous enough for management to trust the numbers.
The solution
What we built
Four connected modules on one database, so a figure entered once shows up everywhere it is needed.
Mobile
An app for the people behind the wheel
Drivers do not sit at desks, so Relixio goes with them. The mobile app is built with React Native and Expo on the same API as the web application.
- GPS route recordingThe route is recorded automatically, from order approval to the end of the trip.
- Expenses from the fieldFuel, tolls and other costs are entered on the spot, against the order.
- Works without signalData waits on the device and is sent as soon as the connection returns.
Engineering
Decisions that keep it maintainable
Clean architecture on .NET
A layered ASP.NET Core API with CQRS, validation and a clear line between business rules and infrastructure.
Multi-tenant by design
Every client company sees only its own data, with modules enabled per contract.
Three roles, enforced on the server
Administrator, client manager and driver — permissions are checked in the API, not just hidden in the interface.
One source of truth for numbers
Reports aggregate the same invoices and mileage that users enter, so totals always reconcile.
Bilingual from day one
Serbian and English across the web application, the mobile app and the marketing website.
Responsive everywhere
The full application works on a phone as well as on a desktop, down to the last form.
Technology
- ASP.NET Core
- C#
- Entity Framework Core
- SQL Server
- React
- TypeScript
- Ant Design
- React Native
- Expo
- REST API
The result
From an empty repository to a working business system
Relixio is feature-complete and preparing for its public launch. For Bdot it is also proof of something we tell every client: one team can take a product all the way — backend, web, mobile and marketing website.
- 4
- Deliverables: API, web application, mobile app and marketing website
- 3
- User roles with permissions enforced on the server
- 2
- Languages in every interface: Serbian and English
- 1
- Team responsible for all of it
Need a product built like this?
Whether it is a SaaS idea or an internal system, we can take it from specification to launch.