Long-form writeups of shipped projects — what the business problem was, what shape the solution took, and what the numbers looked like after launch.
Case study of ArTicket: replacing a licensed MuchTicket operation with a custom Next.js + PostgreSQL ticketing platform, own canvas seat-map engine, MercadoPago + Payway signed HMAC webhooks, QR access control, Chatwoot omnichannel support desk on a second VPS.
Case study of Servifibras: replacing a licensed AI CRM (prometheo.ai) with an in-house Anthropic Claude Sonnet 5 + Haiku 4.5 assistant, complexity-classifier model routing, RAG grounded on live catalog, 263-test Playwright sweep, zero-downtime deploy with schema-drift guard.
Case study of Sensu Ángela: full platform for a 24/7 elderly-SOS monitoring service in Mexico, pairing Eview GPS pendants with a live human call center. Next.js PWA + FastAPI/MQTT ingest + Stripe MSI + Capacitor iOS + Android TWA.
Case study of the Hilong Ecuador incident: a production mail server actively compromised, malware eradicated (cryptominer + reverse shell + persistence crontab), CVE-2024-45519 mitigated with a custom Perl patch, fail2ban + firewalld hardening, weekly SOC monitoring.
Case study of Agendux: a SaaS appointment platform where WhatsApp reminders cut no-shows in half and a cancellation slot-reuse queue reoffers freed slots automatically. Real-time bidirectional Google Calendar sync, encrypted patient data.
Case study of Distrialma: SQL Server-synced online store grown into a full company-owned back-office ERP over the client PunTouch POS. Tesorería per sucursal, Cuadro de Cuentas Mayores live, cheques lifecycle, AFIP RG 5616, cierre de caja, installable customer PWA with Web Push.
Behind the Vetra USD-backed stablecoin on Polygon PoS. Chainlink Functions verifies fiat reserves in real time, pausable ERC-20 with role-based access, on-chain audit trail, deployment checklist and incident response plan.
Case study of DexSpeed: a Raydium-style AMM DEX on Solana with Anchor smart contracts, SPL token support, Jupiter Aggregator integration. Full trader flow shipped in weeks, 99% reduction in wait time vs the client's previous ETH-based DEX.
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