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Senior PHP Engineer & AI Engineer | LLM Integration | E-Commerce | Tech Lead

Waldshut-Tiengen, Deutschland
Nur Remote
Diplom Informatik (equiv. MSc Computer Science), Martin Luther University Halle-Wittenberg, 2011
Waldshut-Tiengen, Deutschland
Nur Remote
Diplom Informatik (equiv. MSc Computer Science), Martin Luther University Halle-Wittenberg, 2011

Profilanlagen

CV_Sebastian_Bauer__MASTER__PHP_AI.docx
CV_Sebastian_Bauer__Diploma_and_Certificates.pdf

Über mich

Senior PHP engineer and AI engineer with 25+ years of fullstack experience and a background as OXID eSales engineer. Takes full technical ownership from architecture to operations and brings LLM features into production systems, from use-case selection to team enablement.

Skills

PHPAPIsLAMP StackEntwurfDevOpsE-CommerceLaravelMessaging Application Programming InterfacePHP DevelopmentScrumIntegration (Software)PHP FrameworksLarge Language ModelsPrompt EngineeringFull Stack EntwicklungFront EndArtificial Intelligence Markup Language (AIML)
PHP-Entwicklung & Fullstack-Engineering
Uber 25 Jahre Erfahrung in der Fullstack-PHP-Entwicklung, von der Architektur bis zum Linux-Betrieb. Einsatz von PHP, Laravel und Python in produktiven Systemen fur mittelstandische und industrielle Kunden.

LLM-Integration & KI-Engineering
Integration von Large Language Models in produktive Umsatzsysteme. Aufbau von Agenten- und Automatisierungspipelines auf Basis von Anthropic API, OpenAI API, MCP und n8n, eingebettet in bestehende Produktivsysteme.

E-Commerce & OXID eSales
Umfangreiche Expertise als OXID eSales Engineer, inklusive vollstandiger technischer Verantwortung fur Shop-Architektur, Entwicklung, Betrieb und Sicherheit. Skalierung von Produktkatalogen und Durchfuhrung kompletter Shop-Upgrades.

Prompt Engineering
Entwicklung und Optimierung von Prompts fur den produktiven Einsatz von LLMs, insbesondere zur Automatisierung redaktioneller Prozesse und zur Produkttextgenerierung.

Datenbanken & ElasticSearch
Fundierte Kenntnisse in MySQL und ElasticSearch, eingesetzt zur Skalierung von Produktkatalogen auf uber 120.000 Produkte und zur Optimierung von Datenpipelines und ETL-Prozessen.

DevOps & Infrastruktur
Einsatz von Docker, GitLab CI, Ubuntu und Python fur den stabilen Betrieb von Produktivsystemen mit 99%+ Uptime. Verwaltung von Server-Infrastruktur und Deployment-Pipelines.

Software-Architektur & Clean Code
Entwurf skalierbarer Softwarearchitekturen nach modernen Engineering-Praktiken, inklusive Software Design, Clean Code und automatisiertem Testing.

Technical Lead & Agile Coaching
Sieben Jahre Erfahrung als Technical Lead, Scrum Master und Agile Coach. Fuhrung von Entwicklerteams, Durchfuhrung von Hiring-Prozessen und Einfuhrung agiler Methoden (PSM I, PSPO I, CSM).

GDPR / EU AI Act & Governance
Kenntnisse in regulatorischen Anforderungen rund um DSGVO und den EU AI Act, angewandt bei der Reaktion auf Sicherheitsvorfalle und der Einfuhrung von KI-Systemen in Unternehmen.

JavaScript & Frontend-Technologien
Einsatz von JavaScript und Smarty im Rahmen von E-Commerce-Projekten zur Entwicklung und Pflege von Shop-Frontends.

Sprachen

DeutschMutterspracheEnglischverhandlungssicher

Projekthistorie

Consultant / Lead Engineer

Various clients (AI Implementation Programmer)
AI adoption for German mid-market firms end to end: use-case selection, build, rollout, staff enablement. Building agent and automation pipelines on Anthropic / OpenAI APIs, MCP and n8n, integrated into existing production systems. Training and coaching client staff so the workflows survive without the consultant. Technologies: Anthropic API, OpenAI API, Claude Code, MCP, n8n, Python, PHP, Laravel.

Founder / Lead Developer

kjernePM & Social Horizons
kjernePM: minimal project management SaaS for small dev teams, built in Laravel, full architecture to operations. Social Horizons: AI-driven social media management platform, done-for-you and SaaS tier. Technologies: Laravel, PHP, MySQL, Docker, Hetzner, Anthropic API, n8n.

Technical Owner / Lead Developer

ambiente & object GmbH
Single technical authority for the complete OXID eShop stack: architecture, roadmap, development, operations, security. Integration of pCon.facts VR furniture configurator as an OXID module, automation of price and discount sync from manufacturer data. Led response to a live SQL injection incident: forensics, patch, hardening, GDPR breach notification (BayLDA). Technologies: OXID eShop, PHP, MySQL, pCon.facts API, Linux, GitLab, Docker.

Managing Director & Senior Software Engineer

Digital Vitamins GmbH
Custom development, E-Commerce and AI integration for German Mittelstand and industrial clients; own SaaS products. Technical lead on client engagements: architecture, delivery, and guidance of client-side and partner developers.

Technical Owner

Trader GmbH
Full technical ownership: numerous custom modules, two complete shop upgrades. Scaled the catalog from 20,000 to 120,000 products with no platform rebuild. Sustained 99%+ uptime across the entire engagement. Technologies: OXID eShop, PHP, MySQL, ElasticSearch.

Consulting Engineer

GTECH Industries GmbH
Led the client's internal team through the build: concept, technical guidance, review, rollout. Replaced manual, article-by-article entry of manufacturer catalogs with an automated import and mapping pipeline into product master data. Cut lead time per catalog from several weeks to a few hours. Technologies: Python, CSV mapping.

Lead Developer

SPAR Mathis
Integration of LLM-driven product copy generation directly into the shop backend. Built editorial review and approval step so generated text never goes live unchecked. Cut effort per product text from approximately 2 hours to approximately 10 minutes. Technologies: OpenAI API, PHP, Shopware 6.

Technical Owner / Team Lead

KOFFEREXPRESS24
Led a team of several developers, including through difficult situations. Maintained a legacy shop version while implementing a complete new design. Guaranteed functional stability at 99%+ uptime. Technologies: OXID eShop, PHP, MySQL, Smarty, JavaScript.

Developer

ABUS
As part of the development team, updated and migrated the complete online shop: 19 subshops across 23 countries. Handed over a fully installed, running shop on new server infrastructure. Technologies: OXID eShop 4-7, PHP, MySQL.

Scrum Master / Agile Coach

SWING GmbH, Freiburg
Led and coached agile development teams (two teams with each five developers), introduced and embedded Scrum practice, ran hiring and review processes.

Senior Software Engineer

OXID eSales AG
Migrated the shop ecosystem to version 6, with major refactorings of the database layer and the introduction of Composer.

Senior Software Engineer

OXID eSales AG
Worked on efire, a platform that exported product data from 3,000 shops to Amazon, eBay and other marketplaces.

Software Engineer

MLU Halle-Wittenberg

Zertifikate

PROFESSIONAL SCRUM MASTER 1

Scrum.org

2019

PROFESSIONAL SCRUM PRODUCT OWNER 1

Scrum.org

2019

Certified Scrum Master

ScrumAlliance

2012

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