Backend Software Engineer working mainly with C#, ASP.NET Core, Python and FastAPI.

I build backend systems around APIs, asynchronous processing, distributed workflows, authentication, payments, observability and data-intensive applications.

I currently work at the Paderborn Center for Parallel Computing (PC²).

I am currently building FlowForge, a backend platform for workflow execution and distributed job processing.

The project is being developed in stages, starting with the execution core and worker infrastructure before moving into document intelligence.

FlowForge Core
    ↓
Workflow Execution
    ↓
RabbitMQ + Workers
    ↓
Retries and Reliability
    ↓
Stable FlowForge API
    ↓
Document Intelligence Platform
    ↓
FlowForge Integration
    ↓
Python / FastAPI Document Worker

The main focus is reliable asynchronous execution, worker processing, retry handling and clear workflow state.

Repository · Live API

A backend election platform built with ASP.NET Core, Entity Framework Core and SQL Server.

It covers:

• election setup and election positions
• candidate applications
• application payments
• administrative review
• contestant management
• voter registration
• secure vote casting
• voting history
• election results
• JWT authentication
• refresh-token rotation
• role- and claims-based authorization
• caching
• background processing
• audit trails
• OpenTelemetry instrumentation
• Prometheus metrics
• Grafana dashboards
• Tempo distributed tracing
• NLog application logging

The project follows a layered architecture with thin controllers, service interfaces and implementations, repositories, Unit of Work and infrastructure abstractions.

Digital wallet and banking REST API built with .NET 8, ASP.NET Core and Entity Framework Core.

Includes authentication, transaction processing, bill payments, airtime and data purchases, Docker and CI/CD.

Banking application built with Python, SQLAlchemy and MySQL.

Includes account management, transfers, transaction processing and asynchronous database operations.

E-commerce application built with ASP.NET Core, MVC, Blazor, Entity Framework Core and SQL Server.

Includes authentication, shopping cart functionality, order management and automated tests.

C# backend project for managing country and regional data.

Machine-learning project using K-Nearest Neighbors to classify penguin species from physical characteristics.

• C#
• ASP.NET Core
• Python
• FastAPI
• Entity Framework Core
• SQLAlchemy

• SQL Server
• PostgreSQL
• MySQL
• MongoDB
• Redis

• RabbitMQ
• Background workers
• Asynchronous processing

• OpenTelemetry
• Prometheus
• Grafana
• Tempo
• NLog

• Docker
• Git
• GitHub
• Swagger / OpenAPI
• xUnit
• Moq

• Backend architecture
• Distributed systems
• REST API design
• Event-driven systems
• Message queues
• Background processing
• Authentication and authorization
• Payments
• Caching
• Observability
• Database design
• Reliability and retry handling
• Automated testing
• System design

GitHub: @Slimcent

Backend engineering • Distributed systems • APIs • Reliability • Observability