Christian Moser
I design, modernize, and deliver mission-critical, enterprise-scale systems. Oracle at the core — PL/SQL, APEX — and deliberately broad around it: full-stack delivery to Python/FastAPI, system and integration architecture, DevOps, and applied AI.
Oracle at the core, deliberately broad around it
Deep specialization in the Oracle stack, combined with the architectural judgment to keep enterprise systems reliable, maintainable, and compliant.
Oracle Database
Database development and architecture on Oracle 19c / 26ai, from data model to performance.
PL/SQL Engineering
Robust, testable business logic and batch processing at enterprise scale.
Oracle APEX
Web applications and internal systems built and delivered end to end in APEX.
Forms Modernization
Migrating legacy Oracle Forms to APEX without losing operational continuity.
ORDS & Integration
REST/ORDS services and integration across SOAP, JSON, XML, and heterogeneous databases.
Solution Architecture
System design, performance tuning, and legacy migration for business-critical platforms.
Full-Stack Development
Full-stack delivery beyond the Oracle core — Python/FastAPI, node.js, JavaScript, PostgreSQL, and web front ends.
Applied AI & Agents
Agentic workflows (LangGraph), multi-agent orchestration with human-in-the-loop gates, MCP, Claude & OpenAI APIs, and AI-assisted development (Claude Code).
DevOps & Infrastructure
Docker, Linux administration and hardening, CI/CD and schema migration (Liquibase), reverse proxy / TLS (Caddy), and Git-based workflows.
Four decades of production systems
A selection of recent engagements, described by domain. Named references and full project history available on request.
Nationwide EU subsidy monitoring
Full-stack development and QA ownership on a country-wide, EU-mandated system for agricultural subsidy management, including regulated data exchange with the European Commission.
Wafer production systems
Mission-critical, high-availability production systems for crystal-rod pulling, including automated test frameworks and web services for warehouse automation.
Production planning & calibration
Legacy Forms-to-APEX modernization and external customer portals for calibration data, integrating heterogeneous databases via ORDS.
Core-system migrations
Automated migration frameworks consolidating legacy and subsidiary systems into central insurance platforms, plus data-warehouse cost reporting for management.
Experience you can hand a hard problem to
I have spent 40 years in IT and more than 30 of them building software on Oracle. My work sits where the database meets the business: designing data models, engineering PL/SQL, delivering APEX applications, and modernizing systems that organizations depend on every day.
I work hands-on. Clients bring me complex, business-critical problems — a legacy platform that needs modernizing, a production system that must not fail, a migration that has to be right the first time — and I take responsibility for the solution end to end.
Recently certified as an AI Strategist, I bring modern backend engineering and applied AI to the depth of Oracle experience, keeping delivery current without chasing hype.
Let's talk about your Oracle project
Available for freelance assignments across the DACH region, onsite or remote. Send a short description of the challenge and I'll respond quickly.