Hi, I'm
Santiago Quintana
Fullstack developer.
I build web products that sell.
I turn ideas into fast, scalable, well-crafted applications. I work with startups and companies that want real results, not just pretty code.
Developer focused on results
I've spent 5+ years building digital products for startups and growing businesses. I specialize in the full stack: from high-performance APIs to interfaces that turn visitors into customers.
I don't just write code — I understand the business behind each project. My approach combines solid architecture, best practices and agile delivery with no excuses.
Tech stack
What I build
Tailored solutions for every stage of your digital business.
High-Conversion Landing Pages
Pages built to convert. Load time < 2s, technical SEO and copy that closes. Not just pretty landing pages — ones that actually sell.
Request serviceCustom Web Applications
From internal dashboards to full SaaS products. Clean, scalable architecture built to grow without rewriting everything from scratch.
Request serviceRobust APIs & Backends
REST APIs and microservices that handle peak traffic. Auth, caching, rate limiting and Swagger docs from day one.
Request serviceMaintenance & Optimization
Full audit, refactoring and performance improvements for legacy projects. Measurable results in Core Web Vitals and response time.
Request serviceSelected work
Real projects, real challenges, measurable results.
DentaFlow
All-in-one platform for dental clinics: smart scheduling with WhatsApp reminders, digital clinical records, electronic billing and a KPI dashboard. Went from 0 to 120 active clinics in 6 months, reducing no-shows by 43%.
Brûlé Coffee
Headless storefront for a specialty coffee brand operating in 4 countries. Ultra-fast Next.js frontend with Shopify backend. Result: conversion rate 1.2% → 4.1% and load time 6.8s → 1.1s in the first month.
LogixBoard
Real-time ops dashboard for a last-mile startup: GPS tracking for 200+ drivers, detour alerts, automatic optimal route calculation and exportable reports. Reduced operational coordination time by 67%.
DeskHub
Booking system for a network of 8 coworkings in Bogotá. Room management, recurring billing via Wompi, React Native mobile app and admin panel. Automated 90% of bookings previously handled via WhatsApp.
MediAgenda
Telemedicine platform with WebRTC video consultations, digital prescriptions with e-signatures and patient record management. Integrated with Stripe and MercadoPago. Processed 3,000+ consultations in its first quarter.
FinTrack
Financial dashboard for multi-client accounting firms: automatic bank reconciliation via Belvo, financial statement generation, tax deadline alerts and multi-company access with granular roles.
Dev mode activated
Explore my portfolio like a CLI. Type help to get started.
How I work
A clear process eliminates surprises and guarantees results.
Discovery
I understand your business, goals and technical context. We define scope, timeline and budget in a 45-min call.
Proposal
I deliver a detailed proposal with architecture, stack, milestones and fixed-price estimate. No surprises.
Development
1-2 week sprints with live demos. Clean code, tests and documentation from day one.
Delivery
Production deploy with CI/CD, monitoring configured and team training. Everything documented.
Support
30 days of post-launch support included. Quick fixes and continuous improvements always available.
Discovery
I understand your business, goals and technical context. We define scope, timeline and budget in a 45-min call.
Proposal
I deliver a detailed proposal with architecture, stack, milestones and fixed-price estimate. No surprises.
Development
1-2 week sprints with live demos. Clean code, tests and documentation from day one.
Delivery
Production deploy with CI/CD, monitoring configured and team training. Everything documented.
Support
30 days of post-launch support included. Quick fixes and continuous improvements always available.
What my clients say
"Building since 2026 — I craft full-stack he had it running, and within a month we were live with double the features. His communication and follow-through is exactly what you look for in a freelancer."
Mariana García
CEO · DentaFlow
"Our old store loaded in 7 seconds with 0.8% conversion. Santiago rebuilt everything in 6 weeks. Now it loads in 1 second and we convert at 4%. The ROI was visible from month one. I recommend him without hesitation."
Carlos Ruiz
Founder · Brûlé Coffee
"What I value most about working with Santiago is that he thinks like a product manager, not just a developer. He helped us simplify features we were going to build unnecessarily and focus on what actually moved the needle. We're now on our 3rd project together."
Laura Torres
CTO · LogixBoard
"Santiago delivered on time with clean, well-documented code. Months after launch we have had zero production incidents. He is the kind of dev you always want on call."
Felipe Moreno
Co-founder · Tractivo
"We worked with Santiago on a legacy PHP migration to a modern API architecture. He finished ahead of schedule and the system ended up much faster. He knows how to explain technical issues to non-technical people, which is key."
Andrea Villalba
Head of Product · Innova360
"I hired Santiago for a one-off project and he ended up becoming our go-to dev. He has the judgment to propose solutions rather than just follow orders. That makes him incredibly valuable at an early stage where resources are tight."
Rodrigo Salinas
CEO · Payana
Got a project?
Tell me what you're building. I reply within 24 business hours.