Product engineering partner
I join your team as one more member and push the product from 0 to 1 — and from 1 to the kind of scale that survives its first traffic spike.
// builder. not a ninja, not a rockstar, not a 10x anything
Imagine, build, ship and scale
I'm F. Javier Pedrosa. 15+ years dragging products from whiteboard sketches to production servers. Allergic to buzzwords, in love with boring tech that works, and full of strong opinions about why that microservice didn't need to exist.
profile.ts
// profile.ts
const builder = {
name: "F. Javier Pedrosa",
role: "builder",
stack: ["TypeScript", "React", "Node"],
focus: "0 → 1 → scale",
shipFast: true,
}
export default builder;
// work with me
Product engineering, no smoke
I'm Francisco Javier Pedrosa Ruiz — F. Javier to almost everyone. I work freelance from Málaga with teams building something that matters: I get into the product, not just the ticket.
Applied AI and agents in production
Agents that do real work, not LinkedIn demos. Orchestration, evaluation, and cost per token under control.
Fractional CTO
Senior technical judgement without hiring a CTO. Architecture, stack decisions, and above all saying no in time.
Tailored MVPs
From the idea to something you can show, measure, and sell. Weeks, not quarters, and without microservices nobody needed.
15+ years building product · Remote from Málaga · Spanish and English
Tell me what you are building// latest posts
Blog
I Asked Codex to Cancel a Subscription—and It Even Got Me a Refund
I asked Codex to cancel my annual Medium subscription and request a refund. Five minutes later, the job was done.
Aug 22, 20264 min read
AI won't just write code: it will redesign the interfaces we use every day
A practical case study on using Codex and a Chrome extension to redesign Mercadona’s classic website without replacing its underlying logic.
May 11, 20266 min read
I applied Karpathy's autoresearch to a mobile UX and its “excellence” score went from 54% to 100%
How I turned mobile UX improvement into an automated loop that measures, tests, and keeps only changes that move the score from 54% to 100%.
Apr 21, 20264 min read
No cover image
10 rules I use so Cursor, Claude Code, or ChatGPT deliver quality code
Ten practical rules I use with Cursor, Claude Code, and ChatGPT to reduce noise, preserve context, and get cleaner, more maintainable code.
Oct 21, 20255 min read
// projects
Selected work
Almirant
Open-source project management platform for AI-native teams. It orchestrates LLM agents across the development cycle with scheduled runs, webhooks, MCP access, and a self-hostable stack.
Next.jsReactBunPostgresAI Agents
ProductActive
Flatzer
Conversational commerce SaaS for businesses that need AI agents to answer, qualify, recommend, and hand off sales conversations without exposing all the technical complexity.
Next.jsElysiaDrizzlePostgresOpenClaw
SaaSValidating
Medianonymizer
Privacy-first media anonymization product for documents, images, audio, and video. AI locates sensitive data; deterministic pipelines apply irreversible redaction with auditability.
Next.jsPythonOpenCVPostgresStripe
Privacy ToolPrototype
Anotea
AI-powered QR menu platform for restaurants. It turns menu photos into digital menus with dish extraction, allergens, translations, QR flows, analytics, and Google Business integrations.
Next.jsPayloadSupabaseStripePostHog
ProductLive
// reach out
Let's connect
Got an idea, a product, or a hard engineering problem?
I enjoy working where product thinking and technical execution meet. If you are building something ambitious and want a sharp engineering partner, send me a message.