Custom web applications
Systems that run in the browser: dashboards, internal CRMs and platforms built for your specific operation.
CUSTOM SOFTWARE · FULL STACK
When no off-the-shelf tool does exactly what your business needs, you build it. Web applications, internal tools and software that fits your process — not the other way around.
Leandro Haro builds custom software: web apps, internal tools and AI-powered systems, with full-stack training and real products in production.
Systems that run in the browser: dashboards, internal CRMs and platforms built for your specific operation.
Software that saves your team hours: calculators, quote generators, managers. What you solve today with fragile spreadsheets, done right.
The minimum product that validates your idea with real users — without burning budget on features nobody may use.
Smart search, content generation, classification, assistants. AI as part of the product, not as decoration.
Your CRM talking to invoicing, your site talking to inventory. Data flowing without double entry.
That Google Sheet that became the heart of your business and can't keep up — turned into a real app with permissions and validations.
A generic tool forces you to adapt your business to the software. You pay licenses for features you don't use, fight what's missing, and stay tied to another company's decisions.
Custom software does the opposite: it fits your real process, scales when you grow, and it's yours. No eternal licenses, no arbitrary limits.
It's not always the answer: sometimes an existing tool is enough — and I'll tell you so. But when your process is your competitive edge, cramming it into generic software means giving it away.
My own local-SEO tracking tool on a geographic grid: how a business ranks depending on the searcher's exact location.
OWN PRODUCTApp connected to Google Sheets that calculates event budgets in real time. Instant, error-free quotes.
CLIENT · WEB APPMigrating critical processes from fragile Sheets to stable apps with permissions and traceability.
CLIENTSAutomated audits and Ahrefs data processing. What takes others hours, I do in minutes.
OWN PRODUCTQuote calculators and high-performance microsites embedded into existing sites.
CLIENTSA local-services platform for Patagonia, currently in design as an own product.
IN DEVELOPMENTFAQ
An application built specifically for your business instead of adapting a generic tool. It fits your process, scales with you, and doesn't charge licenses for features you don't use.
It depends on scope. I work in phases with a fixed budget per stage: start small, scale based on results. Pricing in USD.
The focus is web applications and installable PWAs, accessible from any device. For native apps, we evaluate the right technology case by case.
Yes — that's exactly what I recommend: an MVP validated with real users, then scale what works.
Yes. Code, repositories and infrastructure are yours from day one. No black boxes.
Yes, when it adds real value: smart search, content generation, classification, assistants. For full processes, see also AI & automation.
Tell me what you need to solve. I'll tell you if custom software makes sense — or if there's a simpler path.
TELL ME YOUR IDEA