Projects — NexusCred, Java APIs and Python

ReactWebSocketsNode.jsREST API

SPA application · Real time

NexusCred

Single-page chat application, with a frontend and a backend built around the same idea: each layer does one thing and does not need to know how the others work.

Strict separation between presentation, state and transport: components talk to a service layer, never to the network.
Token-based session, validated on the connection handshake as well.
A persistent WebSocket for messages and REST for everything else, with automatic reconnection and explicit loading and error states.

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JavaHibernateJPASQLMaven

Backend · REST · ORM

Java APIs

Several REST APIs built on top of Hibernate, each with its data model, its transactions and a deployment on both a local and an external server.

Data model first, then the Hibernate mapping, then a service layer holding the transactions, and only at the end the endpoints.
Any operation touching several tables runs inside a transaction: either it completes, or nothing is left half-written.
The same environment-variable configuration locally and on the external server, with no paths or credentials hard-coded.

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PythonPOOpytestSQL

Training · Backend

Python projects

A collection of projects from my training as a Python developer: the Mate Academy course on one side, and what I build on my own on the other.

Exercises and projects ranging from language fundamentals to object-oriented programming, automated testing and working with APIs.
The one taking most of my time right now is a banking system in development: accounts, transactions and making sure no balance is ever left half-written.
The priority is data consistency and error handling, above the interface.

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