Alexander Ertli

I design cloud and application architectures for SaaS, ERP, AI/RAG, and managed services.

Terraform / Kubernetes / GitOps / IaC / Go/Python

Experience

Technical Founder

Contenox / Self-employed / Hamburg
Since Apr 2025

Built and maintain a local-first AI agent runtime compiled as a Go binary. Pivoted the core design from a cloud orchestrator to config-driven local execution chains; the work includes a multi-tenant document SaaS version.

Lead Engineer

advancedsolution GmbH / Hamburg
Jan 2026 - Jun 2026

Designed and implemented a multi-tenant ERPNext provisioning system for isolated B2B tenant instances. Implemented a custom Kubernetes operator in Go, a web control panel, and automated provisioning via Terraform, Ansible, and GitLab CI/CD on IONOS Cloud.

Senior Software Developer

Direktiv.io (acquired by archTIS) / Remote
Feb 2023 - Mar 2025

Backend development for a Kubernetes-native workflow engine in Go. Migrated the codebases to a monorepo structure, optimized event routing latency, and integrated monitoring pipelines via OpenTelemetry and Prometheus.

Data Specialist

T-Systems on site services GmbH / Hamburg
Aug 2022 - Jan 2023

Developed Python microservices on Kubernetes and implemented vulnerability scanning in build pipelines to meet compliance standards.

IT Systems Consultant

Self-employed / Hamburg
2013 - 2022

Configured networks, IT asset management systems, and VoIP routing for small businesses.