Christian D.

Co-founder and technical lead of Bluesky, an AEO / GEO (Answer Engine Optimization / Generative Engine Optimization) SaaS platform that measures and optimizes brand visibility in AI-generated answers (ChatGPT, Perplexity, Gemini, Claude).

End-to-end platform design and development:

- Multi-LLM scoring engine: generation, execution, and analysis of large-scale prompts on major market models, extraction of citations and brand mentions.

- Ranking pipeline inspired by state-of-the-art in information retrieval: TF-IDF, BM25, neural rerankers (Vertex AI, open-source models like Qwen3-Reranker).

- Automatic prompt generation from URLs and industry corpora, multilingual DACH coverage (FR / DE / EN / IT).

- Analytics dashboard (Next.js, React, TypeScript): visibility tracking, competitive analysis, actionable recommendations.

- Self-hosted Kubernetes infrastructure, LLM workload orchestration, API cost optimization.

Clients: premium brands and agencies in Switzerland and DACH (retail, banking, services, communication).

Role: architecture, development, technical recruitment, AI watch, and product strategy support.

Co-founder and CTO of Flint Delivery, a Swiss same-day delivery platform connecting local merchants (pharmacies, veterinarians, retail, cosmetics) and independent couriers in Zurich.

Responsible for technical architecture and end-to-end product development:

- Merchant Portal and back office (Laravel + Inertia.js + React): order management for partner merchants, real-time tracking, invoicing, administration.

- Public API (Laravel)

- Flint Rider mobile apps (React Native, published on iOS and Android): ride acceptance, navigation, proof of delivery, courier payment.

- Real-time backend: ride dispatching, GPS tracking, push notifications, payment management.

- Infrastructure, PostgreSQL database, CI/CD, and monitoring.

Technical and product management: architecture, roadmap, recruitment, code reviews, and support for operational growth.

A portion of delivery fees is donated to pediatric cancer research.

Co-founder and technical lead of ToBill, a Swiss invoicing SaaS for freelancers and SMEs. QR-bill compliant, multi-currency, multi-language (FR/DE/EN).

Complete execution: architecture, web development (Next.js, React, TypeScript) and mobile (React Native, Expo), Node.js backend, PostgreSQL database, self-hosted Kubernetes infrastructure. Payment integrations, compliant PDF generation, authentication, transactional emails (Resend) and marketing (Brevo).

Product management: roadmap, customer feedback, multilingual support, App Store listings FR / DE / EN.

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