Available for new projects

Cassio Rossi

Apple Platform Developer

Full-lifecycle development for iOS, macOS, watchOS & visionOS — from first concept to App Store launch. 30+ years of engineering experience across four continents.

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About Me

Engineering apps people
actually love to use.

I'm a senior software engineer with over three decades of hands-on experience building software for global companies including IBM, Roku, Worldpay, Ocado and VeriFone.

For the last 16+ years I've focused exclusively on the Apple ecosystem — shipping native apps for iPhone, iPad, Mac, Apple Watch and Vision Pro. I own the entire product lifecycle: architecture decisions, UI/UX craft, backend integration, App Store submission and beyond.

I hold a Master's degree in Machine Learning & Big Data (Distinction) from Anglia Ruskin University and speak five languages, which makes collaboration across global teams effortless.

Swift SwiftUI Combine CoreML ARKit SwiftData CloudKit App Store Connect CI/CD Python Agentic Development SDLC Agile

Credentials

🎓 MSc Machine Learning & Big Data — Distinction
Anglia Ruskin University, 2022

📱 App Store developer since 2009 — 16+ years of native Apple development

⭐ Top-ranked apps — iBovespa reached Top 20 iPhone & Top 10 iPad

🏆 IBM Design Thinking Practitioner

💻 Open Source Contributor — MacMagazine on GitHub

🚀 Empretec · SEBRAE — Entrepreneurship (UN methodology, 2008)

🌍 English · Portuguese · Spanish · Italian · French

Location & Availability

🕐 Available for remote projects worldwide

✅ Open to long-term contracts & short engagements

What I Do

End-to-end Apple
development expertise

From zero to one, or from v1 to v10 — I bring deep platform knowledge and a product mindset to every engagement.

Apple Platform Development

Native apps built with Swift and SwiftUI that feel at home on every Apple device and delight users from first launch.

iOS & iPadOS
macOS (AppKit & SwiftUI)
watchOS & visionOS
App Store submission & review
Performance optimisation

Technical Leadership

Senior engineering oversight for startups and scale-ups that need a seasoned iOS architect without a full-time hire.

CTO & fractional tech lead
Architecture & code review
Team mentoring & upskilling
Hiring & technical assessments
Roadmap & sprint planning

AI & Machine Learning

Bringing intelligence to your app with on-device ML models, CoreML pipelines and modern LLM integrations.

CoreML & Create ML
Natural language processing
Computer vision & ARKit
LLM & API integration
Predictive features & personalization

Portfolio

Shipped apps,
real impact.

iBabyControl: Baby Tracker

Complete baby tracking companion for iPhone & iPad. Log feeding, diaper changes, sleep, health and medicines — with iCloud sync, journal entries and a full activity timeline.

iOS iPadOS iCloud Swift

MacMagazine

Official iOS, iPadOS & watchOS app for MacMagazine.com.br — one of the largest Portuguese-language Apple news sites. Open-source on GitHub, with widgets, dark mode, Apple Watch support, Disqus comments and Picture-in-Picture.

iOS iPadOS watchOS Open Source

E aí, Marília?

Universal iPhone & iPad app for EntendendoiPhone subscribers — access all tips, save favourites, search by topic, read the latest news, access courses and purchase books with a single subscription.

iOS iPadOS Universal SwiftUI

How I Work

A process built for
ambitious products

Clear communication, no surprises, and a relentless focus on shipping quality software on time.

Discovery

Understanding your vision, users and constraints before writing a single line of code.

Architecture

Designing a scalable, maintainable foundation that fits your product and team's needs.

Development

Iterative delivery with weekly demos, test-driven development and regular code reviews.

Launch

Full App Store submission support, metadata optimisation and post-launch monitoring.

Get In Touch

Let's build something
great together.

Tell me about your project and I'll get back to you within one business day.