Oskar Ryszard Kosciuk
@oskarryszardkosciuk
Senior Mobile Developer with 8 years of experience in app development.
PolandWhat I'm looking for
I am a Senior Mobile Developer with over 8 years of dedicated experience in crafting robust and user-centric mobile applications for both iOS and Android platforms. My expertise lies in developing and maintaining cross-platform mobile applications using Flutter, where I have successfully increased app performance by 25% for numerous clients. I am skilled in implementing state management solutions and optimizing app performance, achieving a remarkable 40% reduction in load times.
Throughout my career, I have collaborated closely with UI/UX designers to deliver responsive and user-friendly mobile interfaces, enhancing user engagement by 30%. My ability to leverage both hard and soft skills has led to significant project outcomes and improved client satisfaction. I have a proven track record of leading development teams and implementing Agile methodologies, which have facilitated timely project deliveries and high-quality standards.
Experience
Work history, roles, and key accomplishments
Senior Mobile Developer
Ecovita
Oct 2020 - Present (5 years 8 months)
Developed and maintained React Native applications for iOS and Android, achieving a 20% increase in user retention. Led a team of four developers using Agile methodologies, resulting in a 30% improvement in project completion rates.
Mobile Engineer
Riddep
Oct 2018 - Sep 2020 (1 year 11 months)
Developed a fully-featured social media platform, authoring over 150,000 lines of code. Championed the development team, ensuring project milestones were met while maintaining high code quality standards.
Software Engineer
Veloxity
Oct 2016 - Sep 2018 (1 year 11 months)
Engineered the Veloxity SDK for Android, React Native, and Unity platforms, now functioning on over 5 million devices. Maintained an online platform for real-time advertisements and achieved a crash-free rate of 99.98%.
Education
Degrees, certifications, and relevant coursework
AGH University of Science and Technology
Bachelor of Science, Information Technology
2011 - 2016
During my Bachelor of Computer Engineering program, I gained a solid foundation in computer science principles and engineering practices. Through coursework and hands-on projects, I developed proficiency in programming languages, software development, hardware design, and system analysis. This program equipped me with a deep understanding of the interplay between software and hardware components,
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