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Santiago Bernaldo De QuirósSB

Santiago Bernaldo De Quirós

Founder & iOS Developer

€250/day
Cadiz, ES
8-15 years

Average response time: 1 hour

About Santiago

I’m an experienced native iOS developer with 8+ years in the software industry. I specialize in building high-quality iOS apps using Swift and SwiftUI, with earlier experience in Objective-C. I’ve taken multiple apps from concept to App Store launch, both as a solo developer and as part of a team.

My strengths include writing clean, maintainable code, working with modular architectures (VIPER, MVVM, MVP), applying SOLID principles, and implementing Unit Tests to ensure code reliability. I’m comfortable using both UIKit (programmatically and via Interface Builder) and SwiftUI (used extensively in personal projects).

I’m well-suited for short- or long-term collaborations with tech companies that value clean architecture, autonomy, and high standards.
  • Spanish

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • iFeel
    iOS Developer Contractor
    July 2025 - March 2026 (8 months)
    - Most spoken communication was conducted in English due to working within an international team.
    - Contributed to a TDD-driven migration from a legacy architecture to a multi-endpoint architecture, applying SOLID principles across the codebase.
    - Took ownership of the App Store release process, managing the full Git Flow from development to main branch and ensuring stable production releases.
    - Migrated several UIKit views to SwiftUI, preserving existing business logic while introducing new SwiftUI view models and improved state management.
    - Pioneered the adoption of ViewInspector to enable unit and UI testing of SwiftUI views, significantly improving testability.
    - Increased unit test coverage to 25%, being one of the main contributors to TDD and testing strategy, especially within the Networking and Use Cases layers.
    - Improved test coverage across SwiftUI view models and views, leveraging test doubles, mocks, and ViewInspector.
    - Worked across two squads: one product-focused and another dedicated to B2B clients, collaborating with cross-functional teams.
    - CI/CD pipelines using Bitrise for automated testing, building, and App Store deployments.
    Acted as Crash Dispatcher for two sprints, analyzing crashes, identifying root causes, and reporting actionable issues in JIRA.
    - Fixed critical bugs and delivered new features on time, contributing to overall app stability and product evolution.
    SwiftUI Unit Tests iOS Mobile App Deployment
  • kospot
    Founder & iOS Developer
    December 2024 - Today (1 year and 6 months)
    Tarifa, AN, Spain
    Designed and developed a full-featured iOS app for remote workers using Swift, SwiftUI, Firebase, and modern architecture patterns. The app includes Apple/Google/email/faceid/touchid authentication, account deletion, guest mode, and over 20 functional screens. Core features include location-based check-ins, nearby spot discovery, route launching via Google Maps, work session logging, profiles with session history, and viewing sessions from followed users. Social features such as follow/block/comment are fully implemented with privacy-aware filtering across search and maps. Built using Test-Driven Development (~300 tests, 80% initial coverage), async/await, and a clean Composition pattern for dependency injection. Architecture is modular, MVVM-based, and designed for scalability and testing. Fully aligned with App Store privacy guidelines, with proper handling of location permissions, manual check-ins, and user-controlled visibility. A professional-grade app built over months of focused work, showcasing clean code, robust privacy, and thoughtful user experience design.
  • Caio & Mike
    iOS Lead
    December 2023 - Today (2 years and 6 months)
    Tarifa, AN, Spain
    As a student in Caio & Mike's program, I experienced exponential growth as a developer. The program offers deep dives into advanced iOS programming topics such as modular software design for building robust systems and apps, test-driven development, and the application of SOLID principles and best software practices.

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Education

  • Essentials
    Essentials
  • iOS Lead Essentials iOS
    Caio & Mike
    2024
    iOS Lead Essentials iOS

Skill set

Categories