Don't read my portfolio.
Play it.

I'm a product engineer from Buenos Aires who designs, builds and runs complete products on my own: a multi-tenant SaaS platform, two multiplayer-and-arcade games, a rate tool Argentine freelancers price their hour with. Everything below is real and working. Touch it.

In a hurry? instead.

pulso monitor 01

esperando señal

tap · click · space when the blip crosses the red arc · every 5th arc is golden and worth 3

Dibujá:

80s

dibujá acá — el reloj arranca con tu primer trazo

TrazoLoco

That canvas is the same one ten people share in a real room, over WebSockets, no signup. Public matchmaking or a private 4-letter code; a "broken telephone" mode; chaos modifiers that force one continuous line or drawing blind; the best rounds export as vertical video.

One Node + Socket.io server runs the whole state machine: turns, scoring, letter hints, profanity filtering, and a 90-second reconnect grace so a backgrounded phone rejoins its game.
Strokes travel as normalized coordinates, so a drawing looks identical on any screen — resize this page and watch yours survive.
A 1,252-word Spanish dictionary, a Discord bot that opens private rooms, and an end-to-end smoke test that plays a full two-player game over real sockets.

play with friends at trazoloco.quovra.com

One platform, switched on per client. This is the owner panel of a real kind of customer — a barbershop — and the public site their visitors see. Flip a module. The site changes in front of you.

Barbería Hestia

Owner panel · modules

Reporte mensual enviadoowner-only · nothing changes on the public site

sitioPages, hours, map and WhatsApp. The base everything else plugs into.
turnosOnline booking with time slots and a Mercado Pago deposit.
tiendaA small catalog with real stock, sold straight from the site.
reseñasAsks happy clients for a Google review after their visit.
eventosAnnounces the next event and takes sign-ups.
avisosA newsletter box. One email a month to the client list.
reportesA monthly report to the owner's inbox. Invisible to visitors.
sociosMemberships, plans and classes, with a free trial class.

Onboarding: 0 lines of code written. 1 module live.

Barbería Hestia Villa Crespo · desde 2014

Cortes con turno,
sin espera.

Lun a Sáb · 10 a 20 h
Av. Corrientes 5120

Escribinos por WhatsAppCómo llegar

Reservar turno

Hoy 16:30Hoy 18:00Mañ 11:00Mañ 15:30

Seña por Mercado Pago · $3.000 · se descuenta del corte

Reservar y pagar seña

Tienda

Pomada mate 100 g7 en stock$9.800

Aceite para barbaÚltimas 2$7.200

Agregar al carrito

Planes y clases

Plan mensual4 cortes · barba incluida$28.000

Curso de barberíasábados · 8 clases$45.000

Clase de prueba gratis

Próximo evento: Noche de barbas

Jue 18 · 20 h · cupos limitados · trae a un amigo

Anotarme

¿Cómo te fue?

Dejanos tu reseña en Google

Novedades por mail

tu@mail.comSuscribirme

Un mail al mes. Sin spam.

Sitio sin publicar

Activá «sitio» en el panel y esta página aparece.

Quovra.

My studio, and the multi-tenant platform behind it. What you just did is the whole business model: every capability is built once and switched on per client by configuration. Bookings with Mercado Pago deposits, an online store with real stock control, review funnels, gym memberships, a site builder. The acid test for every feature: can a whole client be onboarded without writing code?

9 Cloudflare Workers, 35 Postgres tables, ~53,000 lines shipped to production in a 17-day build.
Free-tier ceilings drove the architecture: with 5 cron triggers per account, expiring holds are computed at read time, so work scales with usage, not with tenants.
Deposits go straight to each business's own Mercado Pago account. Per-tenant credentials live in Supabase Vault; only the payment webhook can confirm, or undo, a paid booking.
Deny-all row-level security: no table is readable by any client key; every query runs server-side through the service role, scoped by tenant.

quovra.com · founding client migrated from a legacy system

Pipeline · septiembre · 3 cuentas · USD 270/mes

Cobranzas: 0 al día

Drag a lead across the board to Cobrado — or focus a card and press → / ←.

Lead 0

Barbería Hestia

sitio web

USD 120/messeguimiento: mañana
Café Ramos

menú QR

USD 60/messeguimiento: ayer

Contactado 0

Box Norte

turnos

USD 90/messeguimiento: vie 5

Cerrado 0

Cobrado 0

Reachr.

From lead to client, from client to payment. A WhatsApp-first CRM for freelancers and micro-agencies in Latin America who sell recurring services to local businesses. The part every CRM forgets is collections, and that's the part you just used. I run my own client outreach on it every day.

Debt is derived, not stored: due status is computed at read time from billing day + payments. A whole billing subsystem with zero scheduled infrastructure.
The public demo-booking endpoint is defended in layers: honeypot, anti-flood caps, an atomic Postgres rate limiter, and a DB-level UNIQUE that turns the race condition into a clean 409.
Email replies are detected without Gmail OAuth: a Cloudflare Email Worker matches the sender to a lead and advances the pipeline on its own.

Next.js 16 · React 19 · Supabase with row-level security · Paddle · 36 API routes · 12 tables · fully bilingual.

reachr.quovra.com

Monthly budget · freelance, Argentina

¿Cuánto cobro?

Your rate in dollars, your month in pesos. Move anything.

You'd bill, per month

ARS0

Your hour, in pesos: ARS 0
Hours billed per month: 0 h of 0 worked
Dollar used: Blue · 1.450

Also on the bench

Smaller worlds, still under construction, every one a real codebase. Nivelate is a growth journal with game spirit: six life areas, XP, 48 missions and levels that never drop, live as a PWA. Desvío is an isometric maze tower defense in Phaser where every sprite is generated in code. La Cuadra is a 3D boarding-house tycoon in Godot where tenants remember and gossip is reputation, with a sim core under 58 headless tests. Talle takes a job posting and tailors your CV to it with an honest fit score, and never invents experience.

Building something?

I'm open to remote product-engineering roles and short, well-scoped freelance builds. I take a product from idea to production and then keep it running, the same way I run my own.

sebastianelustondo@gmail.com

Buenos Aires, Argentina · remote · GMT-3

Don't read my portfolio.Play it.

Barbería Hestia

Lead 0

Contactado 0

Cerrado 0

Cobrado 0

Also on the bench

Building something?

Don't read my portfolio.
Play it.