Sintaxio is a Mexican boutique studio for custom software development based in Guadalajara, Jalisco. Founded in 2018, we work with SMEs and medium-sized companies in Mexico and LATAM that need something more than a template and less than an agency with corporate hierarchy. What we build: - Custom web pages (Next.js, Astro, TypeScript) - Online stores with native CFDI 4.0 and integrated Mercado Pago - Multi-tenant SaaS platforms (Postgres + Row-Level Security) - Custom ERP systems (with integration to SAP, Aspel SAE, Bind ERP, Microsip) - iOS and Android mobile apps (React Native + Expo) - Applied AI: chatbots with RAG, WhatsApp Business automation, agents with tool calling Three public commitments with each project: 1. Fixed price. We quote per project, not per hour. What you sign, that's what you pay. Scope changes are quoted separately before touching code. 2. Bug fixes 30 days included. No tickets, no fine print SLAs. Direct WhatsApp with the person who programmed your system. 3. Zero lock-in. The client remains the owner of the code (GitHub in their name), domains, hosting accounts (Vercel, AWS, Cloudflare), and databases from day one. No mandatory monthly maintenance. Main stack: Next.js 15, React 19, TypeScript, Astro, FastAPI, Node.js, PostgreSQL, React Native, Expo, OpenAI, Claude, Mercado Pago, CFDI 4.0 (Facturapi, Pegaso, Smarter Web, Diverza, Edicom), Vercel, AWS, Cloudflare. Track record and coverage: Over 40 projects delivered since 2018. Production cases include Abona (collections SaaS for credit sales, +38% recovery) and StandMX (website with 3D gallery, x2.5 leads/month). Physical headquarters in Guadalajara with remote service throughout Mexico (CDMX, Monterrey, Mérida, Querétaro, Tijuana) and occasional LATAM.