Self-employed, IT freelancer and consultant, working remotely from Poland.Worked with a diverse range of clients worldwide, on dozens of projects, using various languages, platforms, and technologies, ranging from social apps to digital health solutions, interactive designers, banner management systems, and messaging solutions.

Remote, from Poland, full-time.Behavioral change digital health company aiming to engage employers and health plans eager to deliver elevated wellness solutions to individuals.• Translated Figma designs into user interfaces using UIKit and SwiftUI• Designed a new architecture based on SwiftUI, using a package-driven MVVM-C pattern to favor separation of concerns, encapsulation, and reusability while exposing a legacy interface to the UIKit side of the app• Optimized… Show more Remote, from Poland, full-time.Behavioral change digital health company aiming to engage employers and health plans eager to deliver elevated wellness solutions to individuals.• Translated Figma designs into user interfaces using UIKit and SwiftUI• Designed a new architecture based on SwiftUI, using a package-driven MVVM-C pattern to favor separation of concerns, encapsulation, and reusability while exposing a legacy interface to the UIKit side of the app• Optimized existing codebase, enhancing separation of concerns, reusability, and modularity• Provided technical guidance on development processes and coding standards throughout the team• Mentored interns on best practices when developing iOS apps• Debugged complex issues in mobile applications using Instruments and other debugging tools• Deployed updates regularly through the App Store, following Apple's guidelines and policies and solving rejection issues• Contributed to a backend service combining heterogeneous data coming from other backend services, consumed by the mobile apps Show less

Online learning platform for mobile developers, formerly raywenderlich.com.• Wrote several articles, including a popular series focused on freelancing, remote working, and mental health• Co-authored the SwiftUI by Tutorials and ARKit by Tutorials books• Tech-edited books and video courses

Remote, from Poland, part-time.Designed and implemented the first version of the iOS SDK, written in Objective-C, with bridge to Swift.

I contributed to talent screening, and recently I’m also curating the launch of the Upstack technical blog, as well as tech editing articles.https://upstack.co/team/antonio

Remote, from Poland, full-time.Touchless access control system and video intercom• Worked on the client-facing mobile app used to unlock doors in place, using biometric verification and Bluetooth communication• Integrated a VOIP-based video intercom visitors use to call a tenant/admin at an access point• Modified existing software to correct errors and improve performance, ensuring a more efficient and reliable service• Wrote well-designed, efficient code with… Show more Remote, from Poland, full-time.Touchless access control system and video intercom• Worked on the client-facing mobile app used to unlock doors in place, using biometric verification and Bluetooth communication• Integrated a VOIP-based video intercom visitors use to call a tenant/admin at an access point• Modified existing software to correct errors and improve performance, ensuring a more efficient and reliable service• Wrote well-designed, efficient code with separation of concerns and modularity in mind Show less

Remote, from Poland, full-time.Social network to discover, choose & experience spots around the world.• Participated in the full software development life cycle, from initial requirements gathering to system implementation• Designed the high-level system architecture of the entire service (mobile, backend, database)• As part of the system architecture, designed an efficient and scalable service to retrieve and synchronize 3rd party content (such as Google Business and… Show more Remote, from Poland, full-time.Social network to discover, choose & experience spots around the world.• Participated in the full software development life cycle, from initial requirements gathering to system implementation• Designed the high-level system architecture of the entire service (mobile, backend, database)• As part of the system architecture, designed an efficient and scalable service to retrieve and synchronize 3rd party content (such as Google Business and Yelp)• Wrote technical documentation detailing system architecture, coding conventions, and best practices• Developed the iOS mobile app and the backend (Go + Postgres)• Being the service location-based, focused backend and database development toward geospatial data management, leveraging the Postgres’ PostGIS extension to query and extract data around a specific position in the most efficient way• Deployed & managed applications on cloud platforms Show less

Remote, from Poland.Share lists of apps and digital business cards as an effective personal marketing system for business professionals.• Worked with the CEO to draft requirements, evaluate feasibility, and choose the proper technologies• Displayed willingness to learn and take on additional responsibilities• Designed the high-level architecture and implemented the backend, plus the iOS and Android clients• Led a small, talented team that contributed to mobile… Show more Remote, from Poland.Share lists of apps and digital business cards as an effective personal marketing system for business professionals.• Worked with the CEO to draft requirements, evaluate feasibility, and choose the proper technologies• Displayed willingness to learn and take on additional responsibilities• Designed the high-level architecture and implemented the backend, plus the iOS and Android clients• Led a small, talented team that contributed to mobile development Show less

System Integration• Worked on innovative mobile solutions (SMS Gateway, SMTP to SMS, Unified Messaging, Workforce Management, Remote order entry)• Designed and implemented the most used web-based Italian Free SMS service, capable of sending up to 700K daily messages• Managed multiple projects concurrently while meeting deadlines and budgetary requirements• Analyzed causes and implemented solutions to technical and system issues