Gregor Welters
Senior AI Software Engineer Software Architect
Available immediately · permanent role · remote, hybrid preferred · on-site Düsseldorf / Cologne / Wuppertal
- Orchideenweg 3 · 42657 Solingen, Germany
- gregor.welters@gmail.com
- 0163 190 44 60
- welters.aiproactive.net
- born 17.07.1972
Profile
Software developer and architect since 1998. Started at ten, out of curiosity, and never stopped since. A digital native before the term existed.
Today I design systems and orchestrate AI agents to implement them: spec-driven, test-driven, with Clean Architecture and SOLID as guardrails. Code that meets the requirements exactly and is still maintainable and extensible years from now. I analyse processes, build the automation that actually fits, get teams to the point where they use AI productively instead of decoratively — and I say so when automation is the wrong answer.
Work Experience
AI Engineering — Deepening & own projects
Intensive self-study in agentic AI and spec-driven development with AI agents. Built welters.aiproactive.net (concept, architecture, implementation). First engagements in process analysis, workflow automation, and team enablement for controlled AI adoption.
Senior Developer — Accendere GmbH
Greenfield development of legacy systems with Symfony, each with massive performance and code quality gains: report generator with ~30 parameterized DB reports and complex commission algorithms, automated rating system for the betting business, control systems for the regulatory authority. Reorganized the team's development processes (Scrum, Jira, CI).
Developer — Nexus Netsoft GmbH
Highly customized Shopware shops, import systems and REST APIs in Symfony and Phalcon.
PHP Developer & System Administrator — Maklerkanzlei CEO Deutschland GmbH
Sole responsibility for concept and development of a domain-specific CRM from scratch: mobile data capture, imports/exports, automated email processing, cloud-based telephony, document generation. Introduced Xdebug, Git Flow, unit and functional tests; trained staff in SOLID and OO design.
PHP Developer — Brainbits GmbH · Silvertours GmbH
Scrum team on a large Symfony2 application for producing custom-fit foam inserts: SVG editor, automated CAD/CAM integration, production and admin backend, multi-tenant systems. Then e-commerce on the large legacy codebase of billiger-mietwagen.de.
Self-employed Software Developer — Welters Websolutions
Own platform with automated importers (incl. BMECAT), print template generators for large product catalogs; learning and research programs for the University of Duisburg-Essen.
Early Years — Weos AG · Welters PC-Service
Co-owner and head of development at Weos AG: multi-tenant CMS platform, shop systems, early self-built AJAX technologies. Previously self-employed IT service provider; 1996 multimedia CD-ROM for EICTV Havana (with Kassel Art Academy).
Selected Projects
welters.aiproactive.net
My own website including a backend with CMS and lead management, built entirely spec-driven with AI agents: Astro SSG, Go API, k3s cluster, CI/CD with a staging gate and an end-to-end suite.
agentboard: an agentic platform
With a kanban production system for spec-driven development, including an LLM router with model pooling and an integrated scheduler for local models. A general-purpose platform for building agentic systems, and a runtime engine for the apps built on it.
Reimplementation of the company's core component
Fully automated settlement and booking service for the betting business, with highly complex evaluation of more than 80 bet types, in a thorough Clean Code and SOLID architecture. Legacy runtime: ~20 minutes per race New runtime: ~0.1 seconds per race Rolled out to production in stages, only after a purpose-built test system had proven correct behaviour including every edge case.
Initiative to save the development department
Analysis of the team processes, the information flows and the deficits in team management. I convinced first my teammates, then the team lead and finally the management of a package of measures that led, a few months after implementation, to abolishing a 24/7 on-call rota. Until then a developer always had to be reachable to patch problems in the production database that were caused by unfixed bugs.
Production system for custom-fit foam inserts
SVG-based editor with automated CAD/CAM integration, a complete production and admin backend, multi-tenant systems (Symfony2, Doctrine2, PHPUnit, CI).
The weOs platform
A multi-tenant, multi-user CMS with features ahead of their time: AJAX before the term existed, a socket connection to the browser before WebSocket. It was a server platform for my clients' daily-updated websites, with a generic, universal backend and frontend delivery on a classic LAMP stack using my own framework.