Freelancer profile translated to English.
Back to original languageAbout Steven
Berlin-based Full-Stack Engineer specializing in AI and LLM integration, API and system integration, and workflow automation.
I bring LLM-powered systems into production.
RAG architectures, Multi-Agent workflows, MCP integration, and Multi-Model orchestration via OpenRouter with Cost-Tiered Routing and evaluation logic.
I also build clean integrations between systems, via REST, Webhooks, and OAuth, with n8n-orchestrated pipelines that transform error-prone manual workflows into reliable automation, including idempotency, retries, and error handling for production.
I work end-to-end: Next.js, React, and TypeScript on the frontend, Python, FastAPI, and Flask on the backend, Supabase and PostgreSQL as the data layer, Docker and CI/CD for deployment and operations.
Typical projects: AI assistants and internal copilots, RAG and agentic systems, B2B and B2C SaaS platforms, data aggregation pipelines from heterogeneous sources, and API integration layers. The current mandate is a BRAO and GDPR-compliant Legal-Tech platform with an anonymization gateway for EU-only LLM calls.
I now work AI-augmented, delivering quickly and cleanly across various system landscapes.
German
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Self-EmployedIndependent Engineering & Production DeliveryLEGALDecember 2024 - Today (1 year and 7 months)Berlin, GermanyMultiple production systems across legal-tech, SaaS, and automation. Selection:- Legal-tech platform (BRAO/GDPR-compliant): n8n-orchestrated bidirectional sync layer, anonymization gateway routing all LLM calls EU-only, RAG agent for case research. Next.js, FastAPI, Supabase.- Career-intelligence SaaS, built solo: five-stage LLM evaluation pipeline with cost-tiered routing over Anthropic and OpenRouter, Stripe billing, bilingual Next.js frontend.- Headless data-aggregation engine across 29 heterogeneous sources, three-stage deduplication, circuit breakers, plugin architecture. Python, PostgreSQL, Docker.- B2B field-sales PWA (FMCG), offline-tolerant, RLS. Next.js, TypeScript, Supabase.
- Better Payment GmbH (FinTech),Technical Project ManagerBANKING AND INSURANCEJanuary 2021 - January 2024 (3 years)Germany- Primary technical escalation point between onboarding and engineering; resolved platform issues and aligned with CTO on complex integrations- Ran full delivery cycle: client requirements intake, sprint planning, ticket management, developer coordination through release and client presentation- Structured requirements and GitHub workflows; built WordPress + Zapier onboarding pipeline routing client information into structured support tickets
- Getränke Stöhr GmbHIT SpecialistE-COMMERCEJanuary 2017 - January 2019 (2 years)- Sole IT contact for 50+ staff across office and warehouse operations- Built WordPress/WooCommerce webshop handling 100+ monthly orders with warehouse delivery integration
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Education
- Masterschool Institute of Technology2026
- Apprenticeship: Wholesale and Foreign Trade ClerkDeltatecc GmbHAusbildung: Kaufmann im Groß- und Außenhandel