Oktawian Chojnacki
Experienced Software Engineer
🎓 MSc in Computer Science
⚡️ BSc in Electronics
👷♂️ 15 Years in Software Engineering
📱 11 Years in Mobile Engineering
🧡 8 Years in Swift Engineering
🏠 Based in Wroclaw, Poland
📧 oktawian@me.com
📞 +48 603 585 037
Work Experience
Undisclosed Company
Senior Staff Software Engineer
Nov 2024 – Now
🇺🇸 Cupertino, USA
Contributing to ecosystem-wide software initiatives at technology company under strict confidentiality.
Presidential Title, LLC
Founding Software Engineer
1 yr 4 mos • Aug 2023 – Nov 2024
🇺🇸 Illinois, USA
Built a proptech/insurtech venture from the ground up, developing web services, mobile applications, and machine learning solutions. Created a Python-based API for intelligent client communication and integrated language models to process real estate documentation, reducing onboarding time by 60%.
Dreams is the easy way to save more towards your dreams, make your money go further, and simultaneously reduce your carbon footprint. So you can focus on living life.
Dreams AB
Senior iOS Developer
2 yrs 9 mos • Dec 2020 – Aug 2023
🇸🇪 Stockholm, Sweden
Led development of a next-generation banking and money management iOS app. Mentored junior developers and established best practices for code quality, testing, and documentation. Created a robust CI/CD pipeline that significantly reduced release cycles.
Traditional companies might have cameras. But Kangaroo is the only one that keeps you covered in the case of incidents. Yep, we don’t just have your back. We pay you back..
Roo, Inc.
Lead iOS Engineer & Mobile Team Leader
2 yrs 10 mos • Mar 2018 – Dec 2020
🇺🇸 New York, USA
Architected a flagship mobile app for IoT smart home security from inception. Built and led a team of engineers and testers, developing a cross-platform architecture supporting both iOS and Android with features for device integration, security controls, and subscription management.
Aterian, Inc
Senior iOS Developer
1 yr 4 mos • Oct 2016 – Jan 2018>
🇺🇸 New York, USA
Directed development of an ARKit-based utility application. Built AR features using object detection and machine learning while optimizing performance for complex AR functionalities.
Download the Allegro app and gain one-click access to millions of products, attractive prices, and secure purchases. With the Allegro app on your phone, you can make convenient purchases, track your parcels and pick them up faster using the feature of remote opening of parcel lockers.
Allegro Sp. z o. o.
iOS Developer
1 yr 5 mos • Aug 2014 – Dec 2015
🇵🇱 Wroclaw, Poland
Contributed to Poland's largest marketplace app serving 800,000 monthly users. Implemented UI components and optimized data management for high-volume user interactions.
AddSecure
Software Developer
3 yrs 11 mos • Oct 2010 – Aug 2014
🇵🇱 Wroclaw, Poland
Developed iOS applications using Objective-C, Core Data, and GCD. Also worked with backend technologies including PHP, Python, Node.js, and PostgreSQL.
Education
Wroclaw University of Science and Technology
Master of Science in Computer Science
2010 – 2012
The Karkonosze University of Applied Sciences
Bachelor of Engineering in Electronics and Telecommunication
2005 – 2010
Testimonials
Oktawian took ownership of large, challenging features. His solutions were always scalable, maintainable, and built to last. His attention to detail and commitment to craftsmanship were evident throughout. Thanks to his guidance, our system was not only robust but also thoroughly tested and ready to handle real-world challenges.
Oktawian possesses a strong proficiency in software engineering principles, Swift, and the iOS ecosystem, coupled with a keen eye for detail. His high level of integrity and unwavering commitment to delivering well-functioning software consistently results in the delivery of high-quality work.
Oktawian is very skilled iOS engineer. However his engineering expertise and craftsmanship is reaching way beyond iOS and Swift ecosystem. His commitment, pragmatic approach and quality of delivered solutions has been always paying off.