Software
& product

Consumer apps, marketplaces and AI-powered tools — design & build.
Peter Neyra · see hardware →

A handful of real products — designed and built end to end. One person.

These are working products, not design studies. I build them end to end — the product thinking, the interface, the backend, the data, the go-to-market — and each gets a design language of its own, built for its audience rather than a house style. The projects below are how that plays out. No agency, no handoff. I think by building.

Sancho y Panza · Current venture · 2026

Sancho y Panza
the order desk that listens

My current venture. Family food distributors in Spain run on WhatsApp voice notes, calls and email — Sancho y Panza turns that stream into structured orders, ready to invoice in the systems they already use, without changing how their customers talk to them. And it reads more than the order: it hears the sentiment inside each message, so a producer knows which relationships need attention while the paperwork handles itself. Spanish-first, WhatsApp-native, built end to end — product, AI pipeline and go-to-market — now opening its founder early-access programme.

AI agentsWhatsApp-nativeB2B food supplyFounder
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Sancho y Panza
sanchoypanza.com
Sancho y Panza
Open project

Scope · leo.casa · 2026

Scope
clear agreements for every home job

A home-renovation marketplace for Spain. A homeowner describes a job in plain language and Leo turns it into a priced, milestoned scope; the money sits in escrow and releases phase by phase as each stage is approved; tradespeople join by importing their existing Habitissimo profile — reviews, ratings and history pulled in seconds. Chat-first, escrow-backed, bilingual — designed and built end to end: the product, the AI agent, the payments and the marketing site. Open the case study to browse the real product and a live, scripted demo of every flow.

AI agentsMarketplaceEscrow paymentsSpain
Open case study
Scope
leo.casa
Scope
Open project

Dis Dat · Chrome extension · 2026

Dis Dat
point at anything, for AI agents

A free, open-source Chrome extension that lets you point or talk at any element on any page — your localhost, a live site, or anyone else’s — and hands your AI coding agent the actual element instead of a screenshot. It reads every layer underneath: the exact DOM selector and a11y role, computed CSS and box model, framework state (event listeners, React props/state), WebGL shaders and geometry, network calls and their schemas, and a render trace (paint, layout shift, reflow). Then it turns a plain-language reaction like “this feels cramped” into precise, code-ready instructions with the real selectors and values — dropped straight into Cursor, Claude Code or Codex.

Chrome extensionDeveloper toolsAI agentsOpen source
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Dis Dat
disdat.dev
Dis Dat
Open project

01 · Vitrina · 2026

Vitrina
farm drops

Problem. Small farms grow exceptional food but can't reach city shoppers, who pay main-street markups for less. Distribution is the bottleneck.
Solution. Vitrina pools a neighbourhood's demand — people pre-order personalised groceries from small local farms with their neighbours; when an area hits critical mass the drop goes ahead at near-wholesale, collected from a local shop's rented fridge. A phone-first waitlist ranks demand area-by-area before a euro is spent.
Stack. Pure HTML/CSS/JS landing · Supabase · FastAPI on Hetzner · Vercel · bilingual BG/EN. Open it for the live site, the gamified waitlist, and the founder tracker.

HTML · CSS · JS Pixel art No framework Bilingual (BG/EN) Bulgarian market
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Vitrina
vitrina.bg
Vitrina — farm drops
Open project

02 · Leo.casa · 2025–2026

Leo.casa
renovation platform

The public platform for Leo.casa — an AI-powered renovation marketplace for Spanish homeowners and tradespeople. Persona-switching landing (homeowners vs contractors), WhatsApp-native contact flows, transparent line-item estimates, verified contractor badges, and a full dispute resolution flow. Bilingual. One coherent design system across every persona and state.

Next.js AI marketplace Homeowners Contractors Bilingual
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Leo.casa
leo.casa
Leo.casa
Open project

03 · Leo · 2025

Leo
housing concierge

An AI housing co-pilot for Spain. You don't pick filters — you tell Leo how you live, and it finds the rentals and homes worth your time, with a tailored checklist for every serious viewing. Four personas (renters, buyers, buyer agents, relocation) in one bilingual landing, an isochrone "sweet-spot" map, listing-vs-reality mockups, and a voice-first intake. The most design-dense build of the set.

Next.js Real estate AI Lifestyle matching Isochrone maps Bilingual
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Leo · Housing
puedo.casa
Leo — housing concierge
Open project

04 · Leo.casa · 2025–2026

Leo
Estimates

A standalone AI tool for house flippers and investors in Spain. Paste a listing URL, get a room-by-room renovation cost breakdown, comparables of sold properties, an estimated flip margin, and a ready-to-send contractor briefing — in minutes. Designed to feel fast, precise, and trustworthy before the first result even loads. Bilingual (ES/EN).

Next.js AI product House flippers Spain market Bilingual
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Leo Estimates
leo.casa/es
Leo Estimates
Open project

05 · Smart Supply Router · 2026

Routing
simulator

Problem. A warehouseless food supplier routes fresh produce straight from farms to restaurants — no depot to buffer demand, so every order is a direct multi-stop run and the margin lives or dies on routing.
Solution. A browser simulator of real farm→restaurant mornings: pick the orders, it pulls real road distances (OSRM), solves the vehicle-routing problem with a self-hosted VROOM engine, and breaks down the true per-drop cost — goods, last-mile, overtime, distance — to show whether the unit economics work before a van leaves.
Stack. Vanilla JS · Leaflet · OSRM road network · self-hosted VROOM solver · scenario data (farms / restaurants / depot).

VROOM OSRM Vehicle routing Unit economics Leaflet
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Routing Simulator
VROOM · OSRM
Farm-to-restaurant routing simulator
Open project