Senior .NET Backend & AI Integration Consultant | Freelance B2B · Remote
Aktualisiert am 04.03.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 23.02.2026
Verfügbar zu: 100%
davon vor Ort: 0%
Microservices
ASP.NET Core
.Net
c#
MS SQL Server
Rest API
Docker
Clean Architecture
Domain-Driven Design
Entity Framework Core
Performance Optimization
Software Architecture
CI/CD
MongoDB
Redis
RabbitMQ
T-SQL
WinForms
GitLab
xUnit
Spanish
Muttersprache
English
Professional working proficiency (written)

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

4 years 3 months
2021-12 - now

Wealth Management Platform

Backend Consultant .NET 6/8 ASP.NET Core REST API ...
Backend Consultant
Backend consultant on a multitenant SaaS platform for regulated financial advisory (MiFID2). Involved in multiple modules: account and financial product management, portfolio reporting, advice engine, digital signature and document management. Work focused on refactoring critical components, performance optimization and per-tenant observability.
.NET 6/8 ASP.NET Core REST API SQL Server MongoDB Docker RabbitMQ Redis GitLab xUnit Logalty JIRA
Fintech
4 years 11 months
2021-04 - now

Integral Air Handling System

Backend Engineer .NET 5 ASP.NET MVC REST API ...
Backend Engineer
Full design and development of an integral management system for an air handling operator. System built and maintained as sole technical owner. Covers the complete operational cycle: flight and operations management, manifests, rates, automatic billing, storage, accounting and accounting export.
.NET 5 ASP.NET MVC REST API Azure App Service Azure SQL Swagger GitLab xUnit
Logistics
8 years 10 months
2017-05 - now

Operative Management & Billing System

Backend Engineer .NET Framework C# WinForms ...
Backend Engineer
Design, development and maintenance of a desktop application for operative management and billing of air shipments (AWB/house). Automated economic valuation, rate parameterization by client and service, full traceability from operations to accounting. Synchronization with Microsoft Dynamics Navision and external flight management systems.
.NET Framework C# WinForms SQL Server T-SQL Syncfusion Microsoft Dynamics Navision
Air Logistics
7 months
2021-06 - 2021-12

Financial Application

Backend Consultant ASP.NET WebForms .NET Framework 4.7 SQL Server
Backend Consultant
Backend consultant on a banking system in production. Evolutionary maintenance, security hardening and performance optimization on critical components.
ASP.NET WebForms .NET Framework 4.7 SQL Server
Banking
1 year 3 months
2020-03 - 2021-05

Data Platform

Backend Consultant .NET Core 3.1 Docker Kubernetes ...
Backend Consultant
Backend consultant on a business data platform with microservices architecture. Optimization of Snowflake connectors and performance improvements on analytical dashboards. Fork and adaptation of the CData driver for Snowflake to resolve connectivity limitations.
.NET Core 3.1 Docker Kubernetes Snowflake CData
Automotive Sector
6 months
2019-07 - 2019-12

Booking System

Backend Consultant .NET Core 2.1 SQL Server Oracle ...
Backend Consultant
Backend consultant on a hotel management system. Involvement in integrations with external booking systems and internal services.
.NET Core 2.1 SQL Server Oracle REST API
Hotel Chain
1 year 3 months
2018-02 - 2019-04

Quinius Platform

Senior .NET Developer .NET Framework 4.5 C# JavaScript ...
Senior .NET Developer
Supplier purchasing management application with price formula engine (embedded JavaScript). Catalog import optimization: from 1 hour to seconds handling up to 4M references. Real-time product sheet crawler for online stores. Automated purchasing robot (Selenium).
.NET Framework 4.5 C# JavaScript SQL Server Selenium
Webic Internet & Consulting
4 years 1 month
2011-12 - 2015-12

Decentralized POS System

Backend Engineer .NET C# SQL Server ...
Backend Engineer
Full design and development of a decentralized POS system for a network of 30+ stores with real-time and offline synchronization. Built as sole technical owner. Centralized integration with Microsoft Dynamics Navision. Distributed data consistency management between points of sale and central system.
.NET C# SQL Server Microsoft Dynamics Navision
Retail
11 years 1 month
2000-12 - 2011-12

Early Career

Senior Programmer Analyst .NET C# SQL Server ...
Senior Programmer Analyst
11 years of professional development in .NET from its earliest versions. Enterprise applications, web services and system integration.
.NET C# SQL Server ASP.NET COM/DCOM Microsoft Dynamics
Grupo NTG · Toc Systems · Iterdata Networks · Hardware & Programing Galicia

Aus- und Weiterbildung

Aus- und Weiterbildung

1985 ? 1993

Bachelor's Degree in Mathematics

Universidade de Santiago de Compostela


1998 ? 2000

Doctoral Courses ? Analytical and Algebraic Techniques

Universidad de Vigo


CERTIFICATIONS

  • Microsoft Certified Technology Specialist: SQL Server 2005 (MCTS 70-431)
  • Microsoft Certified Professional (ID 7064302)
  • SCRUM: Agile IT Project Management ? Universidad de Vigo, 2013

Kompetenzen

Kompetenzen

Top-Skills

Microservices ASP.NET Core .Net c# MS SQL Server Rest API Docker Clean Architecture Domain-Driven Design Entity Framework Core Performance Optimization Software Architecture CI/CD MongoDB Redis RabbitMQ T-SQL WinForms GitLab xUnit

Produkte / Standards / Erfahrungen / Methoden

PROFILE

  • Senior .NET Backend Engineer & Consultant with 14+ years as an independent contractor, focused on enterprise backend systems in production. I work on projects where the backend is not a technical detail ? it's a critical part of the business.
  • Systems under real load, complex dependencies and operational pressure where problems don't show up in diagrams, they show up in production.
  • I work both independently and embedded in technical teams, delivering complete systems end-to-end as sole developer and contributing as a specialist consultant within larger distributed teams. Background in Mathematics applied to system design, consistent domain models and architectural decisions built to last.


SKILLS

  • Core Stack: .NET 8/10 · C# · ASP.NET Core · REST API · Entity Framework Core
  • Architecture: Clean Architecture · DDD · CQRS · Microservices · Software Architecture
  • Cloud & DevOps: Azure · Docker · CI/CD · GitLab
  • Messaging: RabbitMQ
  • Testing: xUnit · Performance Optimization
  • Desktop: WinForms · Syncfusion
  • Integrations: Microsoft Dynamics Navision · Snowflake · Logalty · Swagger
  • AI Workflow: Claude Code · GitHub Copilot · Gemini

Datenbanken

SQL Server
T-SQL
MongoDB
Redis
Oracle

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

4 years 3 months
2021-12 - now

Wealth Management Platform

Backend Consultant .NET 6/8 ASP.NET Core REST API ...
Backend Consultant
Backend consultant on a multitenant SaaS platform for regulated financial advisory (MiFID2). Involved in multiple modules: account and financial product management, portfolio reporting, advice engine, digital signature and document management. Work focused on refactoring critical components, performance optimization and per-tenant observability.
.NET 6/8 ASP.NET Core REST API SQL Server MongoDB Docker RabbitMQ Redis GitLab xUnit Logalty JIRA
Fintech
4 years 11 months
2021-04 - now

Integral Air Handling System

Backend Engineer .NET 5 ASP.NET MVC REST API ...
Backend Engineer
Full design and development of an integral management system for an air handling operator. System built and maintained as sole technical owner. Covers the complete operational cycle: flight and operations management, manifests, rates, automatic billing, storage, accounting and accounting export.
.NET 5 ASP.NET MVC REST API Azure App Service Azure SQL Swagger GitLab xUnit
Logistics
8 years 10 months
2017-05 - now

Operative Management & Billing System

Backend Engineer .NET Framework C# WinForms ...
Backend Engineer
Design, development and maintenance of a desktop application for operative management and billing of air shipments (AWB/house). Automated economic valuation, rate parameterization by client and service, full traceability from operations to accounting. Synchronization with Microsoft Dynamics Navision and external flight management systems.
.NET Framework C# WinForms SQL Server T-SQL Syncfusion Microsoft Dynamics Navision
Air Logistics
7 months
2021-06 - 2021-12

Financial Application

Backend Consultant ASP.NET WebForms .NET Framework 4.7 SQL Server
Backend Consultant
Backend consultant on a banking system in production. Evolutionary maintenance, security hardening and performance optimization on critical components.
ASP.NET WebForms .NET Framework 4.7 SQL Server
Banking
1 year 3 months
2020-03 - 2021-05

Data Platform

Backend Consultant .NET Core 3.1 Docker Kubernetes ...
Backend Consultant
Backend consultant on a business data platform with microservices architecture. Optimization of Snowflake connectors and performance improvements on analytical dashboards. Fork and adaptation of the CData driver for Snowflake to resolve connectivity limitations.
.NET Core 3.1 Docker Kubernetes Snowflake CData
Automotive Sector
6 months
2019-07 - 2019-12

Booking System

Backend Consultant .NET Core 2.1 SQL Server Oracle ...
Backend Consultant
Backend consultant on a hotel management system. Involvement in integrations with external booking systems and internal services.
.NET Core 2.1 SQL Server Oracle REST API
Hotel Chain
1 year 3 months
2018-02 - 2019-04

Quinius Platform

Senior .NET Developer .NET Framework 4.5 C# JavaScript ...
Senior .NET Developer
Supplier purchasing management application with price formula engine (embedded JavaScript). Catalog import optimization: from 1 hour to seconds handling up to 4M references. Real-time product sheet crawler for online stores. Automated purchasing robot (Selenium).
.NET Framework 4.5 C# JavaScript SQL Server Selenium
Webic Internet & Consulting
4 years 1 month
2011-12 - 2015-12

Decentralized POS System

Backend Engineer .NET C# SQL Server ...
Backend Engineer
Full design and development of a decentralized POS system for a network of 30+ stores with real-time and offline synchronization. Built as sole technical owner. Centralized integration with Microsoft Dynamics Navision. Distributed data consistency management between points of sale and central system.
.NET C# SQL Server Microsoft Dynamics Navision
Retail
11 years 1 month
2000-12 - 2011-12

Early Career

Senior Programmer Analyst .NET C# SQL Server ...
Senior Programmer Analyst
11 years of professional development in .NET from its earliest versions. Enterprise applications, web services and system integration.
.NET C# SQL Server ASP.NET COM/DCOM Microsoft Dynamics
Grupo NTG · Toc Systems · Iterdata Networks · Hardware & Programing Galicia

Aus- und Weiterbildung

Aus- und Weiterbildung

1985 ? 1993

Bachelor's Degree in Mathematics

Universidade de Santiago de Compostela


1998 ? 2000

Doctoral Courses ? Analytical and Algebraic Techniques

Universidad de Vigo


CERTIFICATIONS

  • Microsoft Certified Technology Specialist: SQL Server 2005 (MCTS 70-431)
  • Microsoft Certified Professional (ID 7064302)
  • SCRUM: Agile IT Project Management ? Universidad de Vigo, 2013

Kompetenzen

Kompetenzen

Top-Skills

Microservices ASP.NET Core .Net c# MS SQL Server Rest API Docker Clean Architecture Domain-Driven Design Entity Framework Core Performance Optimization Software Architecture CI/CD MongoDB Redis RabbitMQ T-SQL WinForms GitLab xUnit

Produkte / Standards / Erfahrungen / Methoden

PROFILE

  • Senior .NET Backend Engineer & Consultant with 14+ years as an independent contractor, focused on enterprise backend systems in production. I work on projects where the backend is not a technical detail ? it's a critical part of the business.
  • Systems under real load, complex dependencies and operational pressure where problems don't show up in diagrams, they show up in production.
  • I work both independently and embedded in technical teams, delivering complete systems end-to-end as sole developer and contributing as a specialist consultant within larger distributed teams. Background in Mathematics applied to system design, consistent domain models and architectural decisions built to last.


SKILLS

  • Core Stack: .NET 8/10 · C# · ASP.NET Core · REST API · Entity Framework Core
  • Architecture: Clean Architecture · DDD · CQRS · Microservices · Software Architecture
  • Cloud & DevOps: Azure · Docker · CI/CD · GitLab
  • Messaging: RabbitMQ
  • Testing: xUnit · Performance Optimization
  • Desktop: WinForms · Syncfusion
  • Integrations: Microsoft Dynamics Navision · Snowflake · Logalty · Swagger
  • AI Workflow: Claude Code · GitHub Copilot · Gemini

Datenbanken

SQL Server
T-SQL
MongoDB
Redis
Oracle

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Im Bereich Freelancing
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