FRANCISCO DE HARO

Full Stack Developer

Fantasktic: enterprise management SaaS product (Monday.com-style) built within Fos a Blanc SL, a Barcelona-based audiovisual production company with 10+ years of track record. Product in production with real clients.

• #1 contributor of 6 developers: 307 of 1,033 commits (30%)
• Integrated AI directly into the product: email composition with voice profile that mimics the user's writing style, tone analysis per contact, and intelligent calendar organization
• Multi-tenant architecture with subdomains and cross-domain authentication
• 30+ modules: HR, geolocation time tracking, expenses, digital signatures, real-time chat
• Direct mentoring of junior developer

Stack: Next.js 14, TypeScript, PostgreSQL (~150 tables), Redis, Docker

Technical Auditor & Developer · Stupendastic Films

Clinical management platform with real card payments (Stripe Connect) and patient data.

• Audited the payment system by cross-referencing database with bank records and detected 4 critical financial errors that had gone unnoticed for weeks: · €944 held due to a silent error in transfers to a therapist · €272 overcharged due to duplications in automatic payment retries
• Used AI to analyze the payment flow line by line and cross-reference transactions — a days-long analysis resolved in hours
• Developed automatic invoicing, clinical supervision, and multilingual online booking modules
• 13 audit documents delivered to the client

Saena — Complete SaaS for therapists · saena.app

Clinical platform built solo. Automatic payments with Stripe Connect, interactive calendar, patient portal, video calls, AI audio transcription, multi-clinic support, 3 languages. 219 automated tests.

Promecenas — Fintech infrastructure for NGOs

Platform enabling NGOs to receive digital donations and sponsorships. 100% free model for the NGO, sustained by transaction commission. Full Stripe Connect integration.

Hydra — Secure AI manager for teams · npm: @deharo/hydra

Tool for companies to manage their teams' access to AI tools without exposing credentials. AES-256-GCM encryption, remote execution via WebSocket. Published on npm.

Repai Trainer — iOS App with AI · App Store

Personalized training app. Routine generation with OpenAI, subscriptions with RevenueCat, full backend. Published and operational.

Testum — Exam platform with AI · testum.site

Integrated chat with OpenAI for real-time Q&A. +1,600 questions, +21,400 answers. 100% organic growth among Business Administration students at UMU.