Brenno Ferrari

German neobank with 8+ million customers. Working on the iOS platform team for one of Europe's fastest-growing fintech companies.

Two years and five months spanning two distinct roles. Started as Senior macOS Engineer building VPN and Meshnet features for the NordVPN macOS client. Led a design system initiative that improved developer/designer synchronization. Drove the adoption of a new project architecture through modularization and migration to Swift Package Manager.

Promoted to Senior Swift Engineer on the Apple Low Level team — a foundational role building shared libraries consumed across macOS, iOS, tvOS, and visionOS. Worked directly with multiple product teams to ensure seamless integration and high-quality delivery. This was the role that proved platform-level thinking beyond iOS alone: writing Swift that ships on four operating systems, dealing with platform-specific networking stacks, and keeping a unified architecture across all of them.

Three years building e-commerce infrastructure in Berlin. Developed and maintained Waystation, an internal iOS/iPadOS tooling application. Created PayKit, Wayfair's payments SDK — the layer between the app and every payment processor the company supported, handling multiple payment methods across the platform. Collaborated with the iOS infrastructure team on SPM integration. Led the modernization of Waystation with SwiftUI and Combine. This was the longest single tenure and the period where the senior engineering identity solidified: owning critical-path systems, mentoring, and shipping reliably at scale.

Fitness technology platform based in Munich and Berlin. Developed iPhone and iPad applications for a connected strength equipment ecosystem used in gyms across Europe. Reconstructed the iPad application from the ground up in Swift with high test coverage. Introduced a design module and composable animations framework. Led the architecture transition from XIBs and Storyboards to fully programmatic views. First international role — relocated from Brazil to Germany for this position.

Concrete Solutions was one of Brazil's most respected mobile consultancies — acquired by Accenture shortly after joining. Built "Meu Cartão BV," the iOS banking application for Banco Votorantim, one of the country's major banks. Fully programmatic views in Swift, custom UI components, and intricate animations for credit card transaction management. First dedicated, single-company iOS engineering role after years of juggling multiple positions simultaneously.