$ whoami

Available for full-time remote positions | UTC-3 (flexible for US hours)

Mathias BenignoFull-Stack DeveloperJavaScript / TypeScript Specialist

4+ years building production SaaS platforms, REST APIs, and government digital services across Latin America and Europe. Deep expertise in Next.js, NestJS, and cloud infrastructure. Seeking a remote position with a US-based team.

View Projects Get in Touch

terminal

$ cd projects/portfolio

$ npm install

Added 1283 packages in 24s

$ npm run dev

ready - started server on 0.0.0.0:3000

✓ Ready in 3.6s

$ git status

On branch main

Your branch is up to date with 'origin/main'

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Experience

Professional Experience

Citalo

Founder & Lead DeveloperRemote

2024 -- Present

Multi-tenant SaaS platform for service businesses (clinics, salons)

Next.js SSR frontend, sub-2s load times, strong Core Web Vitals

Stripe + MercadoPago payment integration, WhatsApp Business API

Dockerized infra with CI/CD, Traefik reverse proxy, zero-downtime deploys

Reduced client no-show rates by ~25-35%

Next.jsNestJSDockerStripePostgreSQLWhatsApp API

Agencia 7am

Full-Stack DeveloperRemote

Dec 2023 -- Nov 2025

Government digital portal for Dominican Republic -- digitized administrative processes for thousands of citizens

ChatGPT-powered assistant reducing support overhead by ~60%

Refactored legacy codebases: -30-45% bundle size, improved Lighthouse scores

OpenAI, Gemini, Meta API integrations

Scrum/agile across multiple time zones

Next.jsNode.jsOpenAI APIReactTypeScript

Helphis Tech

Full-Stack DeveloperRemote

Mar -- Nov 2023

Custom client applications with Next.js, Vite, Node.js, Express, MongoDB

Built company's client management platform (quotes, pricing, project tracking)

AWS deployments and server infrastructure management

Next.jsViteNode.jsExpressMongoDBAWS

Projects

Featured Projects

Citalo

Founder & Lead Developer

Architected and shipped a multi-tenant SaaS platform from scratch for service-based businesses across Latin America. Features scheduling, automated reminders via WhatsApp Business API, and multi-country payment processing — reducing client no-show rates by an estimated 25–35%.

Next.jsNestJSStripeDockerWhatsApp API

View Project

PostalPAQ

Full Stack Developer

Built a package management and shipping application with real-time tracking and automated status notifications. Designed the REST API layer and integrated third-party shipping provider APIs for cross-border logistics.

Next.jsTailwind CSSNode.jsExpressMongoDB

View Project

Fundacion Cap Cana

Frontend Developer

Developed a CMS-driven website for an environmental conservation nonprofit in the Dominican Republic. Integrated donation processing with CardNET payment gateway and built event management features.

Next.jsStrapiTailwind CSSCardNET

View Project

DeepFriend

Frontend Developer

Built the frontend for a mental health and wellness platform connecting users with certified therapists for online sessions, featuring real-time scheduling and session management interfaces.

Next.jsTailwind CSS

View Project

Tech Stack