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

I am a Senior iOS Developer and Mobile Architect with over 10 years of experience building clean, secure, and scalable mobile apps. I specialize in Swift, Objective-C, and cross-platform work with Flutter, mentoring teams and championing robust architectures (VIPER, MVVM, MVC) and CI/CD practices. I thrive on collaborating with product and backend teams to deliver consistent UX across iOS and Flutter, driving feature parity, performance, and security. I enjoy sharing knowledge, leading by example, and delivering maintainable code that stands the test of time.…I am a Senior iOS Developer and Mobile Architect with over 10 years of experience building clean, secure, and scalable mobile apps. I specialize in Swift, Objective-C, and cross-platform work with Flutter, mentoring teams and championing robust architectures (VIPER, MVVM, MVC) and CI/CD practices. I thrive on collaborating with product and backend teams to deliver consistent UX across iOS and Flutter, driving feature parity, performance, and security. I enjoy sharing knowledge, leading by example, and delivering maintainable code that stands the test of time.

Jan Handzus





I am a Senior iOS Developer and Mobile Architect with over 10 years of experience building clean, secure, and scalable mobile apps. I specialize in Swift, Objective-C, and cross-platform work with Flutter, mentoring teams and championing robust architectures (VIPER, MVVM, MVC) and CI/CD practices. I thrive on collaborating with product and backend teams to deliver consistent UX across iOS and Flutter, driving feature parity, performance, and security. I enjoy sharing knowledge, leading by example, and delivering maintainable code that stands the test of time.…I am a Senior iOS Developer and Mobile Architect with over 10 years of experience building clean, secure, and scalable mobile apps. I specialize in Swift, Objective-C, and cross-platform work with Flutter, mentoring teams and championing robust architectures (VIPER, MVVM, MVC) and CI/CD practices. I thrive on collaborating with product and backend teams to deliver consistent UX across iOS and Flutter, driving feature parity, performance, and security. I enjoy sharing knowledge, leading by example, and delivering maintainable code that stands the test of time.

Available to hire

I am a Senior iOS Developer and Mobile Architect with over 10 years of experience building clean, secure, and scalable mobile apps. I specialize in Swift, Objective-C, and cross-platform work with Flutter, mentoring teams and championing robust architectures (VIPER, MVVM, MVC) and CI/CD practices.

I thrive on collaborating with product and backend teams to deliver consistent UX across iOS and Flutter, driving feature parity, performance, and security. I enjoy sharing knowledge, leading by example, and delivering maintainable code that stands the test of time.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior iOS / Flutter Developer & Tech Lead at Panaxeo s.r.o.

September 1, 2021 - October 1, 2025

Led iOS development and mentored junior developers, introducing best practices in architecture and CI/CD. Designed and implemented the Secure Remote Password framework for RaiPay, a payment app for Raiffeisen Group deployed in nine countries. Architected and developed the IPBA Conference App using Flutter/Dart (Greenfield project). Collaborated closely with Android and backend teams to ensure feature parity and consistent UX.

iOS Team Lead at Location Labs by Avast

October 1, 2019 - May 1, 2021

Led the iOS team developing Secure Family, a parental control app distributed via AT & T and other carriers. Mentored and onboarded new developers, established coding standards, and conducted regular code reviews. Integrated carrier-specific features into Avast’s Ring Framework (Swift).

iOS Developer at InloopX s.r.o. by Avast

October 1, 2017 - October 1, 2019

Developed core modules for Avast’s Ring Framework enabling parental control, VPN, and location tracking. Implemented facial recognition for Ta t r a Banka’s mobile banking app across all iOS devices. Built Vacatuner, a social tourism network with chat and booking features (Swift).

iOS Developer at Garwan s.r.o.

February 1, 2017 - October 1, 2017

Developed multiple Greenfield projects including Offero, an online marketplace app (Swift). Built Yanko prototype app for gallery visitors and Henry, a digital diner ordering app.

iOS Developer at eGlu

March 1, 2015 - February 1, 2017

Maintained and extended IIHF, the official app for international hockey events. Implemented new banking features for Prima Bank’s Penazenka app (Objective-C).

Freelance iOS Developer – Self-employed

January 1, 2013 - January 1, 2018

Delivered multiple full-cycle iOS apps including Dejt, TookyLooky, and Healthy Shape. Specialized in social and lifestyle apps integrating Facebook APIs and custom REST backends.