01Mobile2026
StepOrbit
StepOrbit is a native Apple Watch app focused on step tracking. It is ROLTEK's first product and the starting point of its line of native apps.
- Swift
- SwiftUI
- watchOS
In developmentView case study
Software engineering · Digital products
Building software. Crafting experiences.
I'm Fran Roldán, a software developer. I design and build digital experiences, web applications and mobile products with an engineering-first mindset.
- Expertise
- Web · Mobile · APIs
- Stack
- React · TypeScript · Java · Swift
- Currently building
- StepOrbit — watchOS
01Selected work
Products built end to end.
From the first architectural decision to the last interaction detail. Each project is documented as a case study.
More projects on the way
New products and open-source work will be published here as they ship.
02Expertise
Where I add the most value.
- 01
Software Engineering
Clean, typed and tested code. Decisions documented so the system can grow without fear.
- TypeScript
- Java
- Testing
- Code review
- 02
Web Applications
Fast, accessible interfaces built with React and Next.js, designed around real user flows.
- React
- Next.js
- Tailwind CSS
- Accessibility
- 03
Native Mobile Development
Native apps for Apple and Android platforms, respecting the conventions of each ecosystem.
- Swift
- SwiftUI
- Kotlin
- watchOS
- 04
Architecture & APIs
Backends and APIs with clear boundaries, predictable contracts and room to scale.
- Spring Boot
- REST
- Data modeling
- Integration
03Philosophy
Good software is more than code.
Code is the material. What matters is what it makes possible, and how long it keeps working well.
01
Architecture
Structure decides how easy the next change will be. I design boundaries before writing features.
02
Performance
Speed is a feature. Measured, budgeted and protected from the first commit.
03
User experience
Every technical decision ends in a person using the product. That is the real test.
04
Maintainability
Software lives for years. Readable code and honest documentation are a form of respect.
04Currently building
On the workbench.
~/roltek/now
- Product
An Apple Watch app focused on step tracking.
Swift · SwiftUI · watchOS
- Focus
Native mobile
Going deeper into native development for iOS and Android.
SwiftUI · Kotlin
- Platform
roltek.es
This site: the home of ROLTEK and its future products.
Next.js · TypeScript · Tailwind CSS
Have something in mind?Let's build it.
Tell me about your idea, product or technical challenge. I usually reply within a few days.
contacto@roltek.es