Available for Hire

Hello, I'm

Sergio Fernández

I build native iOS experiences with Swift & SwiftUI, applying Clean Architecture and SOLID principles to deliver production-ready, scalable apps.

About Me

About Me

Software Engineer based in Montevideo, Uruguay, passionate about the Apple ecosystem and committed to writing clean, maintainable Swift code. I specialize in building native iOS applications using modern technologies like SwiftUI, SwiftData, and Swift Concurrency. I follow Clean Architecture patterns, MVVM, and SOLID principles to deliver production-quality apps that are scalable, testable, and a pleasure to maintain.

Location

Montevideo, Uruguay

Focus

Native iOS Development

Architecture

Clean Architecture + MVVM

Principles

SOLID · TDD · CI/CD

By the Numbers

A snapshot of my development journey

0+

iOS Projects Built

0+

Technologies Mastered

0

Architecture Patterns

0+

Commits on GitHub

Swift Ecosystem

Technical Skills

My core toolkit for building exceptional iOS apps

Languages

Swift

Frameworks & APIs

SwiftUI
Swift Concurrency
SwiftData
Combine
Observation
WidgetKit
REST APIs

Tools

Xcode
Git
SPM
TestFlight
Instruments

Architecture

Clean Architecture
MVVM
SOLID
Swift Testing
< Swift Code />

Modern Swift in Action

Real patterns I use daily to build production iOS apps

Structured concurrency for safe, readable asynchronous code. No more callback hell.

NetworkService.swift
1func fetchUser(id: String) async throws User {
2 let url = URL(string: "/api/users/\(id)")!
3 let (data, response) = try await URLSession.shared.data(from: url)
4 
5 guard let httpResponse = response as? HTTPURLResponse,
6 httpResponse.statusCode == 200 else {
7 throw NetworkError.invalidResponse
8 }
9 
10 return try JSONDecoder().decode(User.self, from: data)
11}
Portfolio

Featured Projects

A selection of iOS applications I've built with Swift

Featured

LensCal

A smart calorie tracker that uses photo analysis to log meals instantly. Tracks macros (protein, carbs, fat), sets personalized daily calorie goals based on body composition (lean mass vs fat mass), and provides a minimal, fast UI designed for logging in just a couple of taps.

SwiftUIVisionCoreMLSwiftDataHealthKit
Featured

GymStreak

A fitness tracking app built with Clean Architecture and MVVM. Features workout logging, streak tracking, and detailed statistics. Uses SwiftUI with modern Swift Concurrency (async/await) and follows SOLID principles throughout.

SwiftUIMVVMClean ArchitectureAsync/AwaitSOLID
Featured

Super Hero Finder

An iOS app to search for superheroes and explore their stats and abilities. Integrates with an external REST API to fetch hero data, displaying power levels, speed, intelligence, and more in a clean SwiftUI interface.

SwiftUIREST APIURLSessionJSON Decoding
Featured

GitHub API Explorer

A GitHub user search application built with Swift Concurrency. Search for any GitHub user and view their profile details including bio, avatar, followers, repositories, and more. Features robust error handling and async/await patterns.

SwiftSwiftUIAsync/AwaitError HandlingGitHub API

BMI Calculator

A Body Mass Index calculator following WHO guidelines. Supports both male and female calculations with personalized recommendations. Features a clean, intuitive SwiftUI interface for entering weight and height data.

SwiftSwiftUIHealthWHO Guidelines
Contact

Let's Connect

I'm currently looking for iOS development opportunities. Whether you have a position, a project, or just want to say hi — I'd love to hear from you.

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