Antoni Sort

Built Rezum.io 0 → 1 as sole Founder & Product Lead: defined the vision, unit economics, PRD, prioritized roadmap, and shipped the beta, owning product, design, and infra trade-offs

Shipped an end-to-end production Harness — embeddings, vector DB, HyDE prompt compression, caching, retriever + reranker — reducing tokens while preserving relevanceCut average tokens per production API call ~85% (≈20k → ≈3k) over a 30‑day production window in closed alpha (<10 testers) by redesigning the retrieval and prompt pipeline and deploying a production RAG harness, lowering LLM cost per query and restoring viable unit economics for alpha.

Co-led a company-saving pivot with the CEO — metaverse to digital collectibles — with under 10 months of runway: drove the POC, co-pitched the FC Barcelona partnership, and owned execution end-to-end, turning near-zero revenue into the company's primary revenue engine in ~6 months

Led a 12-person cross-functional team (Eng, UX/UI, Art, Data) to ship the FCB mobile app MVP in 6 months; scaled to 100k downloads, 15k average DAU, and 15% D30 retention over 8 months — 2.5–5× the mobile benchmark — anchoring six follow-on club partnerships

Built product ops from scratch: a PRD framework in Confluence as a single source of truth, translated into a Jira hierarchy (product → epics → stories → tickets) with strict Do

Drove a 13% lift in CLV by launching a targeted annual subscription tier, converting a retention bottleneck into working capital