Senior Fullstack Engineer — AI Systems & Web3 Platforms Based near Geneva (France) · Open to Swiss & Remote collaborations
I design, build and stabilize production-grade AI and blockchain systems used in real-world environments.
My work focuses on:
- Reliable system architecture
- Async processing & worker-based designs
- Structured data flows & validation
- AI integration in production (LLM / RAG)
- Blockchain data normalization & smart contract interaction
I operate at the intersection of engineering execution, architectural clarity and product constraints.
Frontend
- TypeScript
- React / Next.js
- Vite
- TanStack Query
Backend
- Node.js
- NestJS
- PostgreSQL
- REST APIs
- Worker-based architectures
AI Systems
- LLM integration
- RAG pipelines
- Streaming (SSE)
- Async task orchestration
Web3
- EVM chains
- Smart contract integration (Viem / Wagmi)
- Indexer-based architectures
- Event decoding
- Account abstraction
Frontend architecture ownership.
Structured heterogeneous blockchain data (Indexer + SDK), implemented schema validation layer and event decoding logic.
Fullstack feature delivery inside a RAG-based production SaaS (~16k tenders/month). Refactored AI processing into async workers to eliminate server bottlenecks and improve reliability.
Industrialized internal AI tooling across 5 applications. Reduced operational workload by up to 50% through automation and structured frontend architecture.
- Architectural clarity over accidental complexity
- Stabilization of high-constraint systems
- Pragmatic delivery under real-world deadlines
- Clean TypeScript-first environments
- Strong ownership from design to deployment
Available for long-term freelance collaborations Switzerland or Remote
📫 Telegram: @DavNej