Alfonso Altamar

Custom Software Development

I build systems that handle real money, real operations, real data

Full-stack engineer with 6+ years designing architecture for fintech, logistics, and SaaS. As a founder and CTO, I've taken complete products from architecture design to production, not just isolated features.

Ruby on RailsNext.jsTypeScriptFlutterKotlinPostgreSQLNATS

How I can help

From websites and online stores to software architecture for businesses that can't afford production failures.

Custom software development

Complete products from backend to frontend, designed to scale without costly rewrites. Ruby on Rails, Next.js, and TypeScript as the baseline; anything beyond that is decided by the problem.

Websites and online stores

Landing pages, business sites, and online stores with integrated payments. The same care in performance and code quality as a larger product, in a format built to launch fast.

Bank and payment integrations

Connectors with financial institutions and payment gateways, with idempotency, reconciliation, and failure handling as design requirements, not patches added later.

Have a system that needs to be correct, not just functional?

Let's talk about architecture, integrations, or building your product from scratch.

Get in touch