Antoni Sort

Built and launched an AI career platform beta solo, starting from a vision of the future human labor market, real user problems and the job-to-be-done.

Designed a skills catalog (DAG) fed by live job postings that keeps market supply and demand current, now the backbone for features like evaluation and career roadmaps.

Cut LLM cost per turn 330x ($0.20 → $0.0006) with no quality regression on a 30-question eval set, via narrow task-specific agents and per-profile semantic caching. This made a free public AI feature economically viable.

Made each AI flow a config file instead of code, creating a harness framework tailored to the product: new AI features ship in 3-6 hours and get tuned daily from telemetry. Traded flexibility for speed, rigor and cost.

Co-led the pivot that saved the company, alongside the CEO: built the POC, led the FC Barcelona pitch that closed the partnership and negotiated an achievable product scope with the client.

Designed the card system that aligned the three stakeholder types (company, club and fans) and became a repeatable model for 8 follow-on club partnerships.

Led a 12-person cross-functional team (Eng, UX/UI, Art, Data) to ship the MVP in a fixed 6-month window: 150k downloads 8 months post-launch, and the designed core loop for the app resulted in 2x the industry average for mobile D30 retention in the same app category.