Freelancer profile translated to English.
Back to original languageAbout Abbas
I build production-ready RAG and LLM systems — from data architecture to ongoing, GDPR-compliant operation.
As a Senior AI Engineer, I take on AI projects from concept to production. Not a prototype that shines in the demo and fails in operation — but systems that remain stable, verifiable, and maintainable.
What I deliver:
• RAG Architectures: Hybrid retrieval, vector databases, embedding pipelines, re-ranking, hallucination verification
• LLM Deployment: vLLM, local & cloud models, fine-tuning (QLoRA), GPU inference optimization
• Azure Databricks End-to-End: Data pipelines, MLflow, Databricks Asset Bundles (DABs), GitLab CI/CD
• Backend: FastAPI, agent pipelines, multi-stage verification
What makes me special: I specialize in sovereign, GDPR-compliant AI — local and on-premise solutions for regulated industries where cloud is not an option. Exactly where data protection and traceability are crucial.
I work independently and result-oriented: clear briefing in, runnable system out.
Remote from Hamburg · German & English.
German
Native or bilingual
English
Conversational
Arabic
Native or bilingual
Remote only
Primarily works remotely
Experience
- NeuroTresor Holding LLCFounder & Lead AI EngineerJanuary 2025 - Today (1 year and 5 months)Building a GDPR-compliant, locally hosted AI platform for German professional service providers.• Conception and development of a production RAG architecture with over 244,000 routeable chunks and 456 collections (ChromaDB, PostgreSQL reference graph)• Implementation of hybrid retrieval (BM25 + vector search) with RRF fusion and bge-reranker-v2-m3 reranking; Recall@5 increased from 26% (V1) to 88% (V2)• Multi-GPU deployment on own infrastructure: 4× RTX 5090 (128 GB VRAM total), Gemma 4 26B AWQ-4bit via vLLM-fast, bge-m3 + snowflake embeddings via Ollama• Section-aware chunking strategy with LLM-based tagging for complex German legal documents (BGB, StGB, HGB, Bundestag-Drucksachen)• Development of an evidence-based verification agent (VIKTOR) to reduce hallucinations in legal answers• Fine-tuning pipeline on H200 NVL infrastructure (Vast.ai) with LoRA, eval-loss-driven optimization, and independent reviewer model• CI/CD setup with Docker, Systemd services, automated backups (Borg), and health monitoring; Cloudflare Tunnel for secure external endpoints• Full-stack development: FastAPI backend (21 endpoints), Next.js frontend, progressive web app with PDF export and feedback loop
- Kunden DACH-RegionFreelance IT Service ProviderJanuary 2017 - January 2024 (7 years)• Development of individual web and mobile applications for SME and startup clients (frontend with modern JavaScript stacks, backend in Python and Node.js)• Initial integration projects with Large Language Models and AI APIs (OpenAI, Anthropic) for customer support automation and content workflows• Conception and implementation of corporate websites and landing pages with a focus on performance, responsive design, and SEO best practices• Management of social media channels and creation of content strategies for local businesses• Planning and optimization of Google Ads and Meta Ads campaigns (SEA / Performance Marketing) with continuous A/B testing• IT Administration: Server setup (Linux), backup concepts, domain and email management, security audits for small businesses
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Education
- IT Specialist System IntegrationIHK2017Fachinformatiker Systemintegration