Products & Tools

Software Built by ProxyPattern

We design, build, and maintain high-utility tools, live web applications, and developer utilities built around our core principles of simplicity and determinism.

Featured Application

Live Web Applications

Web ApplicationLive Tool

Factura DGII

Dominican Republic Tax Invoice Generator

A fast, privacy-first tax invoice (NCF & e-NCF) generator compliant with DGII standards for Dominican Republic businesses, contractors, and freelancers. Generates valid fiscal invoices with automated ITBIS tax calculations and instant PDF export.

TypeScriptNext.jsDGII CompliancePDF GenerationPrivacy First

Key Features

  • Compliant NCF sequence formatting (B01, B02, B14, B15, e-NCF)
  • Automatic ITBIS (18%) tax and retention calculation
  • Instant vector PDF export for client delivery
  • Zero server tracking — all data remains local in browser
SaaS PlatformLive Tool

PrestaCRM

Loan & Credit Portfolio Management Platform

A specialized loan management platform built for credit entities, lenders, and financial institutions in the Dominican Republic. Centralizes applicant intake, automated AI/rules-based risk scoring, French amortization calculations, and automated WhatsApp collection notifications.

TypeScriptNext.jsFinTechAutomated CollectionsDouble-Entry Ledger

Key Features

  • Digital intake & automated risk scoring for loan applicants
  • Automated French amortization schedules with immutable double-entry ledger
  • Automated WhatsApp payment reminders, late alerts, & digital receipts
  • Executive portfolio health dashboards and delinquency reporting
Web ApplicationLive Tool

Healthy Food Punta Cana

Nutrition & Health Assessment Platform

A modern web application and health evaluation portal for Chef Nutritionist & Dietitian Jennifer Núñez in Punta Cana, Dominican Republic. Features interactive online health assessment forms, custom meal plan subscriptions, and school lunch program bookings.

TypeScriptNext.jsHealthTechAssessment EnginePunta Cana

Key Features

  • Interactive online health assessment & client intake questionnaires
  • Customized nutrition program & school lunch plan reservations
  • Direct WhatsApp & email consultation integration
  • Fast, responsive, high-conversion modern web experience
Digital MediaLive Tool

La Antorcha Digital

Independent Digital Newspaper & Publishing Platform

An independent digital newspaper and news publishing platform providing news, analysis, and opinion across politics, economics, culture, and sports in Spain and internationally. Built with a modern publishing pipeline and optimized for search & accessibility.

TypeScriptNext.jsDigital PublishingMedia PlatformSpain

Key Features

  • High-performance digital news publishing & editorial management
  • Structured category channels (Política, Economía, Cultura, Deportes, Opinión)
  • Automated 'El Breviario' daily news summary and newsletter pipeline
  • SEO-optimized rendering & full RSS feed distribution
Open Source

Developer Utilities & Packages

Ruby

AISpec

An open-source Ruby gem establishing executable behavioral contracts and statistical assertion testing for LLM applications.

View Repository
Ruby

GemGuard

A fast, dependency-free Ruby library to validate lockfiles, audit vulnerabilities, and block unapproved package updates in local environments or CI/CD pipelines.

View Repository
TypeScript

Promptly

A local-first TypeScript utility to version, evaluate, and test LLM prompt templates against mock data without sending keys to a cloud SaaS provider.

View Repository
Ruby

outbox_rails

A pragmatic Rails engine implementing the Transactional Outbox Pattern to guarantee reliable background job enqueueing and message delivery during database transactions.

View Repository

Have a custom web application idea?

We design, build, and launch high-performance web products with clean architecture and low operational debt.

Discuss Your Project