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

Hello! I’m a Senior iOS Developer with 6+ years of experience building scalable, performant mobile applications using Swift, SwiftUI, and clean architecture. I enjoy shaping robust architectures, mentoring teammates, and driving product-focused outcomes. I also love leveraging AI-powered tooling to boost code quality, automation, and development efficiency. Based in Warsaw, Poland, I collaborate across product, design, and engineering teams to deliver delightful mobile experiences. I’m open to remote, hybrid, or on-site roles and excited to explore opportunities that challenge me and help teams ship value faster.…Hello! I’m a Senior iOS Developer with 6+ years of experience building scalable, performant mobile applications using Swift, SwiftUI, and clean architecture. I enjoy shaping robust architectures, mentoring teammates, and driving product-focused outcomes. I also love leveraging AI-powered tooling to boost code quality, automation, and development efficiency. Based in Warsaw, Poland, I collaborate across product, design, and engineering teams to deliver delightful mobile experiences. I’m open to remote, hybrid, or on-site roles and excited to explore opportunities that challenge me and help teams ship value faster.

Ihar Maroz

App Developer, Web Developer, Full Stack Developer, +2





Hello! I’m a Senior iOS Developer with 6+ years of experience building scalable, performant mobile applications using Swift, SwiftUI, and clean architecture. I enjoy shaping robust architectures, mentoring teammates, and driving product-focused outcomes. I also love leveraging AI-powered tooling to boost code quality, automation, and development efficiency. Based in Warsaw, Poland, I collaborate across product, design, and engineering teams to deliver delightful mobile experiences. I’m open to remote, hybrid, or on-site roles and excited to explore opportunities that challenge me and help teams ship value faster.…Hello! I’m a Senior iOS Developer with 6+ years of experience building scalable, performant mobile applications using Swift, SwiftUI, and clean architecture. I enjoy shaping robust architectures, mentoring teammates, and driving product-focused outcomes. I also love leveraging AI-powered tooling to boost code quality, automation, and development efficiency. Based in Warsaw, Poland, I collaborate across product, design, and engineering teams to deliver delightful mobile experiences. I’m open to remote, hybrid, or on-site roles and excited to explore opportunities that challenge me and help teams ship value faster.

Available to hire

Hello! I’m a Senior iOS Developer with 6+ years of experience building scalable, performant mobile applications using Swift, SwiftUI, and clean architecture. I enjoy shaping robust architectures, mentoring teammates, and driving product-focused outcomes. I also love leveraging AI-powered tooling to boost code quality, automation, and development efficiency.

Based in Warsaw, Poland, I collaborate across product, design, and engineering teams to deliver delightful mobile experiences. I’m open to remote, hybrid, or on-site roles and excited to explore opportunities that challenge me and help teams ship value faster.

Skills

Experience Level

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Work Experience

Senior iOS Developer at ITRex Group

April 1, 2024 - September 30, 2025

Refactored architecture, reducing technical debt by 40% and development time by 30%. Integrated AI-powered tools for code quality, automation, and automated UI testing, resulting in faster feature delivery and improved maintainability. Built a personalized recommendations system, increasing user engagement by 25%. Test coverage rose from 30% to 85%, and crashes were cut by 50%. Mentored 5+ iOS developers, boosting overall team performance by 20% and improving CI/CD processes. Supported CSAT improvements to 4.8/5 and increased LTV by 15%. Contributed to a 2-sided mentor/mentee matching app and led architecture planning for scalable mobile solutions.

Middle iOS Developer at ITRex Group

June 1, 2021 - September 30, 2021

Corporate Health Care App – internal tool for emergency services. Participated in client-side development for real-time alerts and company-wide messaging. Optimized app performance and contributed to architecture and tech stack decisions. Developed an efficient communications system for emergency scenarios and delivered milestones through effective planning and development experience.

Middle iOS Developer at ITRex Group

September 1, 2020 - April 1, 2024

Social Network App – video streaming and communication platform with 300M+ users. Implemented monetization features increasing profits by 35% and retention by 50%. Developed internal SDKs and automated release workflows. Led UX improvements, maintained technical documentation, and drove feature alignment with client needs. Built end-to-end features for scheduling and communication, and participated in user feedback loops to drive product improvements.

iOS Developer at Sam-Solutions

January 1, 2019 - May 1, 2020

Corporate Health Care App – internal tool for emergency services and company-wide messaging. Participated in client-side development for real-time alerts and messaging. Optimized app performance, contributed to architecture decisions, and developed efficient communications systems for emergency situations.