Full Stack Developer — NestJS · Next.js · React Native
I build multi-tenant SaaS end to end — NestJS API, Next.js web, React Native app — and take it all the way to production, including the parts nobody wants to touch: WhatsApp Cloud API, Meta Ads, Argentine e-invoicing, CRM integrations.
Who I am
Full stack developer based in Buenos Aires, with the weight on the backend. I design and ship complete products on my own: a NestJS + Prisma + PostgreSQL API, a Next.js or React web app, and a React Native Android app when the product needs one — plus the deploy, the migrations and the seeded data that let a stranger open the demo and click around. The systems I work on are multi-tenant by default: one install, many clients, isolated data, role-based access and per-tenant encrypted credentials.
What I'm actually good at is the unglamorous half. Asynchronous work with BullMQ and Redis, webhooks with retries and full execution logs, imports that survive a real client's spreadsheet, and third-party integrations that have no happy path: WhatsApp Cloud API, the Meta Marketing API, Argentine electronic invoicing with ARCA/AFIP, Kommo, HubSpot, Shopify and Google Workspace. The largest system I maintain runs on 185 migrations and around fifty modules and is in daily production use; the newest one carries 879 automated tests. A WhatsApp bot I built processes about 27,000 messages a week.
My path here wasn't a straight line. I spent eight years in the United States, where I learned the language and founded my own computer company, and along the way I've led teams, run a business and managed operations. In 2022 I went all-in on software at Henry Bootcamp, and I haven't stopped building since. I work with AI as part of the toolchain — both to move faster and inside the products themselves, where I've built copilots, transcription and LLM-backed features. That mix of hands-on engineering, real-world leadership and C2 English (EF SET 94/100) is what I bring to a team.
Selected work
A selection of things I've built — from multi-tenant SaaS to high-volume automations.
Mobile app to track toll-booth crossings
React Native app that auto-detects toll crossings via GPS geofencing (plus manual logging), tracks spending per vehicle, and is built to verify charges against operator billing. NestJS + PostgreSQL backend with 294 geocoded Argentine toll booths. Android beta.
Multi-tenant SaaS connecting kindergartens and families
Communication & management platform between a kindergarten and parents: per-classroom photo/video gallery (Cloudinary), parent↔teacher messaging, announcements, daily reports (meals/naps/mood) and a shared calendar. Multi-tenant with role-based access (super admin / direction / teacher / parent) — a super admin manages multiple kindergartens. NestJS + Prisma + PostgreSQL backend, React + Vite + MUI web, plus a native Android app (Expo / React Native) for families and teachers. Live demo seeded with a sample kindergarten.
Logs in to the demo kindergarten as Direction (full management). The slug 'jardin-la-estacion' is pre-filled. Other roles share the password secret123: teacher seño@jardin.com, family papa@jardin.com — and superadmin@laestacion.app manages multiple kindergartens.
Built for DotsCom
Conversational CRM: the inbox and the sale in one system
WhatsApp, Instagram and Messenger messages from several companies at once land in a shared team inbox and become contacts, companies and deals with an amount and a stage. It adds what messaging platforms don't give you: revenue reporting, measured first-response time, campaigns by audience, automation flows built on a canvas, and each Meta ad's spend cross-referenced against the sales it actually closed — two ads that look identical inside a CRM stop looking identical. Also does two things the market leader can't: it embeds the live WhatsApp thread inside the client's own system, and it migrates a whole contact base from a legacy CRM with a dry run first. Multi-tenant NestJS 11 + Prisma + BullMQ backend (54 migrations, ~45 modules, 879 automated tests) with a Next.js app. Deployed and operating in technical beta.
Built for DotsCom
Operating system for a software agency
Everything an agency runs on, tied to the client instead of scattered across tools: tickets and dev workflow with handoff between developers, time tracking, client CRM, credential vault, onboarding engine, recurring billing and AFIP electronic invoicing, plus internal chat, calendar, Google Workspace and HubSpot/Kommo integrations, an AI assistant and a marketing/SEO suite with YouTube analytics. Because billing and hours hang off the same client record, it answers what an agency usually can't: what each account really cost, and how much work is being delivered outside contract. NestJS + Prisma + PostgreSQL (185 migrations, ~50 modules) with a Next.js PWA. In production and in daily internal use — it keeps growing every week.
Multi-tenant SaaS for medical clinic management
Scheduling, medical records, cash desk and collections for medical, dental, aesthetic, physiotherapy, plastic-surgery and hair-medicine clinics. Multi-site, white-labelled per client (colors, logo, typography), with modules that switch on per site according to its specialty — each site sees its own menu, not its neighbour's. Since August 2026 it also covers surgeries with informed consent (an operation cannot be marked as performed without a signed consent, and the consent stores a frozen copy of the exact text the patient read), product sales with stock, and electronic invoicing with ARCA (AFIP) CAE. In production with a clinic operating daily.
Demo organisation with four clinics and a selector — the owner account sees all of them. Eighteen demo users share the password demo2026, one set per specialty: medical practice (admin.consultorios@), dentistry with odontogram (admin.odonto@), physiotherapy with session packs (admin.kine@) and aesthetics/surgery (admin.estetica@, cirujano@) — plus accountant and sales at organisation level.
Multi-tenant SaaS for pharmacies and drug wholesalers
Built around the case that motivates it: an Argentine drug wholesaler that opens its own retail pharmacy and has to sell to itself. Where the incumbent system is a generic ERP dressed as pharmacy software — and hands the pharmacist a wall of a hundred voucher types — this one makes the medicine a first-class citizen: batch stock with FEFO expiry control, health-insurer coverage per drug with exclusions and unit caps, DDM batch closing and settlement with per-dispense debits and reconciliation, purchase connectors to wholesalers, ARCA/AFIP electronic invoicing and ANMAT traceability. NestJS + Prisma monorepo (pnpm + Turborepo) over PostgreSQL, using row-level security for tenant isolation — 19 modules. In development; a working codename, not the final brand. Live demo seeded with a wholesaler and its pharmacy.
The login form comes pre-filled — company 'demo', owner account, one click to enter. The demo group is a drug wholesaler that has just opened its own pharmacy, so the intercompany sale, batch stock and insurer coverage all have data to show.
Policy management platform for insurance brokers
Replaced an Excel-based workflow with a full platform: policy lifecycle, automated debt/collections tracking, follow-ups and multi-step XLSX import (scaled to ~8K policies in production). Live demo seeded with sample data.
Marketplace seller intelligence dashboard
Full-stack BI platform: weekly KPIs, automated alerts, health scores, GMV projections and rankings, with role-based access (admin/supervisor/consultant) and CSV/XLSX imports. Live demo seeded with sample data.
Multi-tenant WhatsApp campaigns & messaging platform
Sends template-based WhatsApp campaigns via the WhatsApp Cloud API: multi-tenant, per-source API keys, OTP, delivery-status webhooks, rate limiting and audit logs. NestJS + BullMQ/Redis backend with a Next.js admin panel. Live demo seeded with sample campaigns.
Multi-tenant CRM ↔ e-commerce webhook orchestrator
Config-as-data rule engine connecting a CRM (Kommo) with Shopify/Tiendanube/WooCommerce and shipping providers, so a new client integration is a configuration change rather than a new backend: per-tenant AES-encrypted credentials, webhook ingestion, async workers with retries, declarative rules and full execution logs. NestJS + BullMQ/Redis backend with a Next.js admin. In production, internal use — no public demo.
Anime/manga e-commerce
E-commerce to read and buy manga plus anime merch, with admin and mailing. Team project (8 devs, Scrum).
Countries explorer SPA
Single-page app with search, filters, sorting and CRUD over a countries API.
Where I've worked
2024 — 2025
No Country
Led multidisciplinary teams through job-simulation programs, shipping backend projects on time as both developer and team leader.
2022
Henry Bootcamp
800+ hours of intensive full-stack training. Built React and Node apps, including MangaCoffee — an e-commerce platform delivered with an 8-person team.
2008 — 2019
National Library of Argentina
Database programming (FileMaker) and data systems supporting the human resources department.
2002 — 2007
Compubyte Corp · Miami, FL
Founded and ran a computer sales and repair business in Miami for five years.
Get in touch
Let's build something. Reach me through any of these.