Business systems & integrations
SAP Business One, EDI, Redsys and intercompany solutions connected to real business workflows.
Software Engineer · Commercial Products · Integrations · .NET · TypeScript
Software Engineer building commercial software products that run in production
I build and maintain commercial products and integrations in the SAP Business One ecosystem: replication platforms, authorization layers and multi-tenant web applications, sold and running in customer production environments.
Experience
8 years in tech, 6 building SAP Business One products
Current focus
Enterprise applications and integrations
Location
Zarautz, Basque Country, Spain
Currently building
An MCP server over the intercompany platform’s web backend
Currently shipping
Enterprise apps, internal tools and exploratory product builds
Open to product engineering roles
Aitzol Garro
Software Engineer with systems background
.NET / C# JavaScript SQL Infrastructure
I care about clarity, maintainability and building systems that make sense technically and from a product perspective.
What I build
Enterprise engineering from integration to operations
Applications, integrations and workflows I build, ship and keep running in production.
End-to-end ownership
Analysis, development, data, deployment and maintenance across the application lifecycle.
Infrastructure-aware engineering
A systems background with Docker, operations and reliability in mind.
Selected work
Projects presented as clear, real technical stories
The commercial products I build and maintain for the SAP Business One ecosystem, running in customer production environments. Personal projects, coursework and self-hosted infrastructure are on the projects page.
Enterprise Integration
Intercompany Integration Platform
In production since September 2024 Currently building: an MCP server over the platform’s web backend
Replication and workflow platform that keeps several SAP Business One company databases in sync.
C#.NETSQL ServerSAP HANA
Proprietary: no public repository
API Security
Service Layer Authorization Proxy
In production since October 2022
Authorization layer in front of the SAP Business One Service Layer, enforcing per-entity and per-operation permissions.
C#.NETSAP Business OneREST
Proprietary: no public repository
Enterprise Web Application
Multi-Tenant Approvals Portal
In production since December 2022
Web portal for SAP Business One approval workflows, connected to several company databases at the same time.
C#.NETSQL ServerSAP HANA
Proprietary: no public repository
Experience
Enterprise application experience at Seidor
8 years in tech, 6 of them at Seidor building commercial software products for the SAP Business One ecosystem. They are sold, deployed and running in customer production environments. Alongside these products, I have built SAP Business One add-ons continuously since joining Seidor in 2020.
Learn more about my backgroundGitHub Activity
Language distribution across my repositories
Public repositories only. The commercial products I work on are proprietary and are not on GitHub, so this breakdown does not reflect my professional stack.
JavaScript 62.9%
C# 12.6%
PHP 9.5%
VB.NET 5.3%
Python 3.0%
Others 2.6%
HTML 2.5%
CSS 1.6%
Last updated: Sep 11, 2026, 07:59 AM
Contact
If my profile fits what you are building, let’s talk
I am open to opportunities, collaborations and technically interesting conversations. You can reach me directly by email or find more context on GitHub and LinkedIn.