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Sergio Cortes

MVPs • Product Engineering • Technical Direction

Technical Partner for Founders

Whether you're validating a new idea, rebuilding an AI-generated MVP, or preparing your product to scale, I help you make the technical decisions that keep your business moving.

Book a free strategy callSee how I can help

How I Help

Product Development
Turn your idea into production-ready software
You bring the vision and business knowledge. I help you plan, design, and build a scalable web application with the right technical foundations from day one—so you can focus on customers, growth, and validating your product.
Start your project
MVP Evolution
Transform your MVP into software built to scale
Your MVP proved the idea, but adding new features is becoming difficult. Whether it was built with Lovable, Bolt, Replit, v0, or another stack, I help you evolve it into production-ready software without losing users or momentum.
Discuss your MVP

Why founders choose to work with me

Building a prototype has never been easier. Building software that remains reliable, maintainable, and ready to scale is much harder. I help founders make the right technical decisions from day one, avoiding expensive rewrites as their product grows.

View my work
01
Production experience
I've built and maintained production software for startups, Web3 companies, and enterprise organisations including HoudiniSwap, Unizen and Tata Consultancy Services (Tryg). I understand what it takes to ship software that lasts.
02
Technical decisions with business in mind
My role isn't just writing code. I help founders make informed technical decisions that support product goals, customer needs, and long-term maintainability.
03
AI where it creates value
AI helps accelerate research, prototyping, and delivery—but architecture, engineering judgement, and product thinking still matter. I combine both to move faster without sacrificing quality.
04
Direct partnership
You work directly with me throughout the project. No account managers, no unnecessary layers, and no communication overhead—just clear conversations and transparent progress.

What you'll have after launch

app.yourapp.com/admin
Members284 total
Alex ChenActive
Sara MartínActive
Jose RibeiroActive
An admin dashboard built for your business
  • Manage customers, content, and business data
  • Roles and permissions for your team
  • Reports, exports, and operational tools
app.yourapp.com/onboarding

Step 2 of 4

Set up your workspace

Workspace name
Industry
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A polished product your customers enjoy using
  • Responsive web application
  • Secure authentication and member areas
  • Designed to grow with your business
Your app
Stripe
SendGrid
OpenAI
Connected to the tools your business relies on
  • Payments, email, AI, analytics, and third-party APIs
  • Automations and webhook integrations
  • Scalable architecture for future integrations

Products I've Helped Build

Products I've Built

FinTech
Investment Strategist
A full-stack automated investment platform that monitors US equity markets, evaluates trading strategies using historical market analysis, executes trades through broker APIs, and provides real-time operational insights through automated notifications. Built as an end-to-end product from architecture to deployment.

Products I've Contributed To

Web3 Infrastructure
HoudiniSwap
Built and delivered user-facing features for a privacy-focused cross-chain protocol, helping improve usability while maintaining a high-quality engineering standard.
Digital Assets
Unizen
Contributed to a global digital asset platform by developing production-ready frontend features within a distributed engineering team.
Insurance
Tryg Insurance (via Tata Consultancy Services)
Developed internal tools and customer-facing applications for one of Scandinavia's largest insurance providers, working within enterprise engineering practices.

Trusted by founders, startups and engineering teams.

What it's like to work with me

Building software is a collaborative process. Here's what colleagues and clients have said about working with me across product development and engineering teams.

“Sergio consistently delivered high-quality work, communicated clearly, and demonstrated exceptional attention to detail. He quickly became a trusted member of the team, and I'd gladly recommend him for future opportunities.”

CEO, Unizen

Chief Executive Officer

“Sergio integrates quickly into existing teams, takes ownership of complex features, and consistently delivers production-ready software while maintaining high engineering standards.”

Senior Engineering Manager

Engineering Leadership

How we'll work together

01
🎯 Understand your business
We start by understanding your goals, customers, and product vision. Before discussing technologies, we define what success looks like and identify the highest-value opportunities.
02
🧭 Plan the right solution
Together we'll define the product roadmap, technical approach, architecture, and priorities. You'll understand why we're building something—not just what we're building.
03
⚙️ Build and iterate
Development happens in small, transparent iterations with regular demos and feedback. You'll always know what's being built and have opportunities to refine the product as we move forward.
04
🚀 Launch with confidence
Once your product is ready, we'll prepare it for production and plan the next steps. Whether that's new features, scaling, or ongoing support, you'll have a solid foundation to grow from.

Every founder and every product is unique. We'll adapt the process to your stage, goals, and timeline.

Ways we can work together

Every founder and every product is different. Whether you need help validating an idea, building an MVP, or improving an existing product, we'll choose the engagement model that best fits your goals and stage.

New Product Development
Starting from an idea? I'll help you define the technical direction, plan the roadmap, and build your product from the ground up.
Founders launching a new product
  • Not sure what's right for you?
  • Let's have a conversation about your product, your goals, and where you're currently stuck. I'll recommend the most appropriate way to move forward—even if that means pointing you in a different direction.
Book a free strategy call
MVP Evolution
Already have an MVP? I'll help you strengthen the architecture, improve maintainability, and prepare the product for future growth.
Founders with an existing MVP
  • Not sure what's right for you?
  • Let's have a conversation about your product, your goals, and where you're currently stuck. I'll recommend the most appropriate way to move forward—even if that means pointing you in a different direction.
Book a free strategy call
Technical Partnership
Need an experienced engineer to support technical decisions while continuing to build and improve your product? I can work alongside you as an ongoing technical partner.
Growing startups and early-stage companies
  • Not sure what's right for you?
  • Let's have a conversation about your product, your goals, and where you're currently stuck. I'll recommend the most appropriate way to move forward—even if that means pointing you in a different direction.
Book a free strategy call

Questions founders often ask

Let's talk

Ready to build with confidence?

Whether you're validating a new idea, improving an existing MVP, or planning your next stage of growth, let's talk about your product and the technical decisions ahead. I'll help you understand your options and recommend the best path forward.

Book a free strategy callContact me

No commitment. No sales pressure. Just an honest conversation about your product.