Do you have a business idea and don't want to learn to code?

I build it and put it live. Here are 6 examples.

I'm Natan Valencia. I've spent 21 years making things work on the internet. Everything you see below was built by me, it's online, and you can try it. If you have an idea, I'll hand it to you working in 6 weeks.

Tell me your idea

Apps I've built

These aren't mockups or promises: each one has its own web address and you can go in and see it. This is the same kind of work I deliver on commission.

I built my own SEO tool

ApeSpider · apespider.com · on sale right now

Your website doesn't show up on Google and you don't know why? ApeSpider crawls it end to end, page by page, and tells you what's broken, what it's costing you money, and what to fix first. It also checks something almost nobody measures yet: whether ChatGPT mentions you when someone asks about what you do.

It's my flagship product: I designed it, programmed it and I sell it. When you hire me for a project, you get the same person who built this.

apespider.com

Python · FastAPI · PostgreSQL · custom crawler (resumable, detects WAF blocks behind a 200, on-demand JS rendering, 547 tests) · 84 raw-SQL detectors · Google Search Console integration

ApeSpider screens: rank tracker with average position and visibility, winners & losers and signals, SERP features by device, AI visibility and audit panel with issues by severity

I programmed an investment fund comparison tool

FatCow · fatcow.pro · online, private beta

Investment fund data is scattered across three sources that don't talk to each other, each with its own format. FatCow brings them together —close to 50,000 products— into a search engine anyone can use: filter, compare two funds head to head, and test how your portfolio would have performed.

The hard part is the one you don't see: turning three incompatible sources into comparable data. That part is exactly what many businesses need and can't find anyone to build.

fatcow.pro

Scraping of internal APIs + CNMV + SEC filings · Python · PostgreSQL · SvelteKit · faceted search over millions of rows

FatCow screens: fund search with filters and metrics, head-to-head equity comparison and portfolio backtest with drawdown and composition

Your idea, working, in 6 weeks

You have the idea and you need to show it working — to customers, a partner, an investor. A real first version of your product (what techies call an MVP): I build it the same way I build my own, from the first line of code until it's live.

week 1

We agree on what gets built

We define in writing what's in and what's out. Fixed price means fixed scope: whatever comes up along the way goes on the list for the next version — it doesn't blow up the deadline or the price.

weeks 2–5

You watch it grow every week

From week 2 you have a real web address where you can see the progress. A demo every week, showing you what already works — no PowerPoints, no "trust me".

week 6

Live, on your domain, and yours

Delivered working and in your name: the code is yours from day one, with every decision written down so any developer can carry on without me. No strings attached.

From €2,000 fixed price set on the scoping call · one project at a time
Book the call
If your idea doesn't fit in 6 weeks, I'll tell you on the first call. And if it can be solved without writing any code, I'll tell you that too — cheaper for you, fewer headaches for both of us.

I test trading strategies before money is at risk

Real client work · anonymized reports published here

Would your trading strategy actually work? I'll tell you before you risk a euro: I program it and put it through thousands of simulations on historical data. The result isn't a hunch — it's a report where every number can be verified.

The client of the latest study came after seeing FatCow's public reports. That's why this site shows deliverables instead of telling you how good I am:

Decision report (real study) Interactive results explorer
Real reports from a client engagement, anonymized. What you see is what the client receives.

MT5 · NinjaTrader 8 · thousands of backtests per phase on a queryable results database · deliverables generated from the data

Decision report from the multi-pair grid study: combination map, equity curve and candidates with real costs

I built an automatic watchdog for trading accounts

OsoGuardian · running 24/7 in the cloud

It monitors trading accounts in real time and, when one crosses its loss limit, it steps in on its own: cancels the orders and closes the positions in seconds, at any hour, with nobody watching. An automatic guardian so one bad streak doesn't take the whole account down.

.NET 9 · deployed on Azure · Rithmic API · multi-tenant on top of a single-session API · circuit breaker for gateway outages

OsoGuardian dashboard: live P&L of three accounts, one automatically locked after crossing its loss limit

I made a legal-text generator for websites

LegalWP · legalwp.com · online

Most small websites carry legal texts copied from some other site — and the law requires them to reflect what your website actually does. LegalWP generates yours with a step-by-step wizard that asks just what's needed and hands you the pages ready to publish, compliant with Spanish and EU regulations.

The second part goes further: a WordPress plugin that examines your real website, works out which services you use, and publishes the legal pages directly. It's finished, in legal review ahead of launch.

legalwp.com

React 18 + Vite · PDF export · GDPR, Spanish LSSI-CE and EU AI Act · WP plugin: active-plugin scan + public HTML analysis

LegalWP scanner: services detected on the site and the three legal pages generated and published on WordPress

I moved my blog to a new platform without losing a single page

tecnicaseo.com · my SEO blog since 2013

My SEO blog and, along the way, proof of a delicate technical move: I migrated the entire site to a new platform —63 articles with 12 years of history— without losing a single address on the way. If you've ever migrated a website, you know that almost never goes well.

tecnicaseo.com
Looking for SEO —audits, consulting, content—? That lives there, not here. This site is about building. (The blog is in Spanish.)

WordPress → Astro migration with a custom SQL-dump parser · 290 301/410 redirects · Open Graph images generated on every build

tecnicaseo.com migration: WordPress to Astro with a custom parser, 63 articles, 290 redirects and zero lost URLs
about me

About me

Natan Valencia

I've spent 21 years making things work: I started administering the servers of a company with seven offices, went on to 13 years of technical SEO —four of them for an international portal with more than 20,000 pages in 7 languages— and today I build my own products and projects on commission.

That mix defines how I work: I understand the business behind each project, not just the code. And I have one rule that sums it all up: if a number appears in one of my reports, you can check where it came from.

usual stack: Python (FastAPI · PostgreSQL · Celery) · Sentry · Astro on Netlify (and headless WordPress) · Docker on a VPS

contact

Tell me what you want to get off the ground

An idea you want to show working, data you have but don't use, a task your team repeats by hand every week, something nobody manages to build for you. Write to me and I'll tell you honestly whether I can help, how, and what it would cost. And if I can't, I'll tell you that too.

Write to me