HAMDI ZAYEN

– Designed and shipped an end-to-end email automation SaaS (ingestion → NLP/LLM → ERP actions), reducing manual handling time by ~65%. – Built a domain corpus (web scraping + Prodigy annotation); normalization, train/val/test splits, and data versioning for reproducibility. – Fine-tuned CamemBERT for multi-class email classification; +20 F1 points on minority classes via class rebalancing and stratified cross-validation. – Implemented spaCy NER (customers, products, references) with rule/regex post-validation for business checks. – Delivered a RAG pipeline with LangChain (retrievers, FAISS/Chroma vector store, prompt templates, retrieval-augmented generation) and LLM rewriting (tone/style, summarization, FR/EN) with guardrails and context checks. – Integrated ERPNext REST APIs (token auth) to auto-create quotes, invoices, and delivery notes with centralized audit logging.

– Built an Enterprise Document Management (EDM) platform (Angular + .NET + PostgreSQL) with indexed search and archival workflows, cutting retrieval time by ~75%. – Implemented IAM (roles & permissions, OAuth2), audit trails, and hardened access controls. – Drove modular refactors to improve maintainability and stabilize release cadence; delivered minor features and maintenance.