In Development
BackOnTrack — Recovery App
Mobile app for tracking disc herniation and recovery
Flutter iOS Android Sqflite OpenAI
Hello, I'm Sergio Díaz
a Software Developer
I help founders turn ideas
into seamless digital experiences
New GetaLink is live! About Me
Software Developer & CTO at GetaLink, specializing in full stack development with a focus on cross-platform mobile applications. Experienced in developing systems for clients like MotoGP (Dorna), Acciona, PayRetailers, and Singular Bank.
Barcelona, Spain
UTC+1 (CET)
Available for projects
Experiencia
2025
CTO & Lead Developer
GetaLink
2021 - Present
Freelance Software Developer
Self-employed
2021-2023
Software Developer
Ohtic
2020-2021
Software Developer
Bdr Informática
2019-2020
Java Developer
Logaritme
2019
Software Engineer Intern
Avanade
Main Stack
Backend
.NET 8 
MySQL Entity Framework Frontend
React 
TypeScript 
Next.js 
Tailwind CSS Mobile
Flutter 
Dart Tools & DevOps
Docker 
Git 
GitHub Actions 
Linux VPS 
AWS Hardware
MacBook M2 
Trusted Companies
Featured Clients
I have worked with leading companies across different sectors
CTO
0+
Featured Clients
0+
Projects Completed
0+
Years Experience
0%
Uptime
How can I help you?
Services Offered
High-quality native and cross-platform mobile application development
Cross-Platform Mobile Development
Native apps for iOS and Android with Flutter. Single codebase, native performance, and perfect UX on both platforms.
- Flutter (iOS & Android)
- Clean & scalable architecture
- Pixel-perfect UI/UX
- REST/GraphQL API integration
Native iOS Development
Native iOS applications with Swift and SwiftUI. Maximum performance and leveraging the latest Apple features.
- Swift & SwiftUI
- Apple ecosystem integration
- Push notifications & deep linking
- Core Data & iCloud sync
Backend for Mobile
Robust and scalable APIs with .NET to power your mobile apps. Specifically designed for mobile needs.
- .NET 8 REST/GraphQL APIs
- JWT & OAuth authentication
- Payment gateway integrations (PayPal, Redsys)
- Mobile optimization (pagination, caching)
Deployment & Maintenance
Automated CI/CD for App Store and Google Play. Frictionless updates and continuous monitoring.
- CI/CD (Fastlane, GitHub Actions)
- App Store & Google Play deployment
- Crash reporting (Firebase, Sentry)
- Analytics & performance monitoring
Let's talk about your project
Custom quotes based on scope
Testimonials
What Clients Say
Testimonials from companies I've worked with
"Sergio led the development of our platform from scratch. His ability to translate business requirements into scalable technical solutions was fundamental to our success. The system processes thousands of transactions daily without issues."
Aitor Ruiz
CEO Getalink
GetaLink
"Sergio developed our mobile app with Flutter flawlessly. His attention to detail in UI/UX and seamless backend integration resulted in an app our users love. Fast, professional, and highly communicative."
Jesus Almir
CEO DigiAcción
DigiAcción
Want to be the next satisfied client?
Let's work togetherLet's Work Together
Have a project in mind? Schedule a 30-minute call with me.