Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Hi, I’m Rubens Pessoa de Barros Filho, a Senior iOS Engineer with 9 years of experience building native iOS apps using Swift, SwiftUI, and UIKit. I’ve shipped B2C products used by millions of users and I care deeply about software architecture, test coverage, UI quality, and smooth releases. I take ownership of features from start to finish, collaborating closely with designers and product managers to deliver user-friendly mobile experiences. Based in Graz, Austria, I’m open to opportunities in Vienna or remote work.…Hi, I’m Rubens Pessoa de Barros Filho, a Senior iOS Engineer with 9 years of experience building native iOS apps using Swift, SwiftUI, and UIKit. I’ve shipped B2C products used by millions of users and I care deeply about software architecture, test coverage, UI quality, and smooth releases. I take ownership of features from start to finish, collaborating closely with designers and product managers to deliver user-friendly mobile experiences. Based in Graz, Austria, I’m open to opportunities in Vienna or remote work.

Rubens Pessoa de Barros Filho

App Developer, Developer, Front-End Developer, +2





Hi, I’m Rubens Pessoa de Barros Filho, a Senior iOS Engineer with 9 years of experience building native iOS apps using Swift, SwiftUI, and UIKit. I’ve shipped B2C products used by millions of users and I care deeply about software architecture, test coverage, UI quality, and smooth releases. I take ownership of features from start to finish, collaborating closely with designers and product managers to deliver user-friendly mobile experiences. Based in Graz, Austria, I’m open to opportunities in Vienna or remote work.…Hi, I’m Rubens Pessoa de Barros Filho, a Senior iOS Engineer with 9 years of experience building native iOS apps using Swift, SwiftUI, and UIKit. I’ve shipped B2C products used by millions of users and I care deeply about software architecture, test coverage, UI quality, and smooth releases. I take ownership of features from start to finish, collaborating closely with designers and product managers to deliver user-friendly mobile experiences. Based in Graz, Austria, I’m open to opportunities in Vienna or remote work.

Available to hire

Hi, I’m Rubens Pessoa de Barros Filho, a Senior iOS Engineer with 9 years of experience building native iOS apps using Swift, SwiftUI, and UIKit. I’ve shipped B2C products used by millions of users and I care deeply about software architecture, test coverage, UI quality, and smooth releases.

I take ownership of features from start to finish, collaborating closely with designers and product managers to deliver user-friendly mobile experiences. Based in Graz, Austria, I’m open to opportunities in Vienna or remote work.

Skills

Experience Level

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Portuguese

Fluent

English

Advanced

German

Intermediate

Spanish; Castilian

Beginner

Work Experience

Senior iOS Engineer (Contract) at MARCHON™

January 1, 2025 - April 1, 2026

Rebuilt onboarding flows (welcome/login/signup) and implemented welcome workouts to boost activation; redesigned the home screen for easier navigation between fitness programs; implemented push notifications with deep linking to drive cross-product conversion; built a trial retention feature (questionnaire) to identify user friction and reduce churn.

Independent iOS Engineer & Consultant at Rubens Pessoa de Barros Filho e.U.

August 1, 2024 - Present

Provided end-to-end iOS development services as an independent engineer and consultant, delivering mobile features and architecture guidance for clients in Graz, Austria.

Engineering Team Lead and Project Manager at Tappz GmbH (AI-powered consumer apps)

August 1, 2023 - July 31, 2024

Led a cross-functional team of 4 engineers and 2 designers; managed planning, priorities, and releases across mobile platforms; collaborated with product and design on feature direction and design reviews; improved planning and delivery processes to meet quality standards.

Senior iOS Engineer at Tappz GmbH (AI-powered consumer apps)

June 1, 2023 - August 31, 2023

Built native iOS features in Swift, SwiftUI, UIKit, and MVVM; created an internal library of shared services to reduce duplication and improve maintainability; set up CI/CD with Xcode Cloud and improved branching, code review, and release workflows.

iOS Engineer at iTranslate (translation app, now part of Bending Spoons)

June 1, 2021 - April 30, 2023

Worked on the main iTranslate iOS app, building features with Swift, UIKit, SwiftUI, and MVVM+C; helped redesign the app, achieving a 99% crash-free rate; set up unit testing and Bitrise CI/CD; ran A/B tests to inform feature rollout.

iOS Engineer at Parkside (digital product agency)

February 1, 2019 - May 31, 2021

Built native iOS apps for banking and health clients; collaborated in cross-functional teams using UIKit, SwiftUI, and XCTest; contributed to backend-for-frontend work with NestJS and GraphQL when needed.

iOS Engineer at CloudTaxi (transport app)

April 1, 2018 - August 1, 2018

Developed iOS features for a transport app and contributed to mobile architecture improvements.

iOS Engineer at Ilhasoft

November 1, 2017 - April 1, 2018

Contributed iOS development work as part of the team.

iOS Engineer Intern at Ilhasoft

April 1, 2017 - October 1, 2017

Internship performing iOS development tasks and learning project workflows.