Rogelin spearheaded the complete rebuild of the Really app, delivering it to TestFlight in under three months. He designed the app's core architecture using MVVM-C, ensuring scalability and maintainability. Additionally, he integrated a third-party privacy provider, developed a VPN detector for enhanced security, and collaborated with backend engineers to create and refine critical APIs.

• Built the Tally SDK, providing seamless integration for partners and delivering all features from the main app.
• Led the development of various features, including networking, onboarding, login, and credit card management. Worked directly with Product and UX teams to document requirements and feature specifications.
• Collaborated with cross-functional teams to design, develop, and launch critical features on schedule.
• Defined API interfaces to sync with backend systems and other platforms.
• Conducted code reviews to ensure adherence to best practices.
• Created CI/CD pipelines and workflows to support development and delivery lifecycles.

• Contributed to the development of various features for the Fierce iOS app, including onboarding, sign-in, and stock and crypto listing.
• Collaborated with a multicultural global team across multiple time zones.
• Assisted in creating comprehensive documentation to facilitate future updates and maintenance.
• Worked directly with product managers to refine app features and functionalities, ensuring alignment with client goals.
• Partnered closely with UX/UI designers to maintain visual consistency across all features of the iOS application.

• Developed robust, scalable, maintainable, and testable code for the Banco Neon iOS app.
• Supported two distinct squads, assisting the PM and SM in defining priorities.
• Implemented multiple A/B testing features to optimize app performance.
• Defined and developed reusable modules based on the Design System.
• Reduced app crashes by optimizing code with RxSwift.
• Mentored junior developers, providing guidance on best practices and iOS development methodologies.

Client: BTG Pactual (Investment/Bank/Broker)

• Developed iOS applications using UIKit, RxSwift, View Code, and Firebase App Distribution.
• Contributed to the creation of one of the first crypto trading features in the Brazilian market.
• Implemented real-time options listing using websockets with the Starscream library.
• Developed a standalone module utilized in various internal and direct-to-consumer applications.

Client: Banco Original

• Worked on a hybrid application based on IBM MobileFirst.
• Led the mobile development team and assisted the product team in defining development strategies.
• Collaborated with multi-disciplinary teams using Agile development frameworks.
• Successfully transitioned legacy applications to newer platforms, ensuring full functionality with minimal user disruption.
• Mentored junior developers, fostering a collaborative environment for knowledge sharing and skill development.
• Provided insights and support to the Web team, sharing learnings from mobile development.

Client: Banco Bradesco

• Contributed to various projects related to frameworks for the mainframe environment.
• Developed key APIs and services for gathering analytics data on program execution.
• Added features to enhance monitoring systems

• Contributed to various projects related to government policy compliance and back-office operations.
• Focused on money laundering prevention and performance indicators.
• Conducted technical analysis, designed databases, and developed features on the Mainframe.
• Worked on system architecture using COBOL, JCL, DB2, and Java EE.
• Provided onsite support to ensure smooth project execution and client satisfaction.