15.10.2026 aktualisiert
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AI Engineer & Full-Stack Developer | Python, LLM/RAG, React, Automation
Zollikon, Schweiz
Zollikon +50 km
Über mich
AI Engineer & Full-Stack Developer based in Zollikon (Zurich). I build websites, AI automations and private, on-premise AI systems for Swiss SMEs, from first prototype to production. Practical, privacy-first and focused on measurable results.
Skills
LLMKünstliche IntelligenzData AnalysisComputer VisionAutomatisierungWebdesignSEOPythonPostgreSQLMachine LearningProzessautomatisierungTensorFlowTypeScriptWeb Application DevelopmentPyTorch
SERVICES FOR SMEs (Zurich area, remote or on-site)
- Websites: design and development of fast, modern business websites and landing pages
- SEO & local search visibility: technical SEO, Google Business, local rankings
- AI automation: document/receipt capture, account reconciliation, email and lead workflows
- Custom CRM and web applications: pipelines, deadlines, invoicing, API integrations
- Private AI on-premise: local LLM assistants without cloud or subscription, nDSG-compliant
- AI voice agents: qualify leads and book appointments automatically
- Portfolio and services: estebanmarco.ch
AI ENGINEERING & MACHINE LEARNING
- LLM applications: RAG (hybrid search, ChromaDB, BM25), function calling, agentic workflows (LangGraph)
- Local LLMs (Qwen, Llama, llama.cpp), LoRA/QLoRA fine-tuning, DPO
- Computer vision: YOLOv8, OpenCV, OCR; time series with LSTM
- Reinforcement learning (DQN, Q-Learning), Bayesian networks, anomaly detection
- Speech: Whisper (STT), TTS, voice assistants
- PyTorch, TensorFlow, ONNX Runtime, CUDA
FULL-STACK DEVELOPMENT
- Backend: Python, FastAPI, REST APIs, PostgreSQL, Supabase, Redis
- Frontend: React, TypeScript, Tailwind CSS, HTML/CSS/JavaScript
- Docker, Linux, Git
DATA
- Data analysis and dashboards (Python, SQL)
- AI governance: OPA/Rego policy gates, prompt-injection protection
CERTIFICATIONS
- Harvard CS50: Introduction to Artificial Intelligence with Python
- IBM: Introduction to Data Analytics (Coursera)
Erfahrung
Berufserfahrung0 - 5 Jahre
Freelancer seit2026
Sprachen
EnglischgutSpanischMuttersprache
Projekthistorie
Websites, SEO and AI automation for small and medium-sized businesses in the Zurich area:
- Design and development of business websites and landing pages
- Technical and local SEO to improve Google visibility
- AI automations: receipt capture, account reconciliation, lead workflows
- Private on-premise AI assistants and AI voice agents for appointment booking
- Own lead-prospecting tool in Python (new company registrations + website audits)
- Portfolio and live demos: estebanmarco.ch
Fully private cognitive AI assistant running 100% offline on local hardware (no cloud, no telemetry):
- Voice pipeline: wake word, Whisper speech-to-text, local LLM, text-to-speech
- Local LLMs (Qwen, llama.cpp) with function calling, multi-step planning and agentic actions
- Persistent memory with hybrid RAG (ChromaDB + BM25)
- Continuous learning via nightly LoRA fine-tuning
- Universal device control (smart home, calendar, files) with a firewall-enforced privacy model
- Python, Redis, React
- github.com/esteban3marco-ctrl/omnimind-local
AI-powered smart city traffic management platform combining 5 ML models:
- Computer vision (YOLOv8, OpenCV) for vehicle detection and OCR for license plates
- LSTM traffic forecasting and autoencoder anomaly detection
- Deep reinforcement learning (DQN) for adaptive traffic-light control, validated in the SUMO simulator
- Simulated results: 25-35% shorter average wait times and 15-22% lower CO2 emissions vs. fixed timing
- Python, PyTorch, TensorFlow, ONNX Runtime; 43 automated tests
- github.com/esteban3marco-ctrl/atlas-traffic-ai-pro