Stepan Usiantsev

- Developed a mobile bank for a business that has more than 300,000 clients - Engaged in close discussion with the business, assessed timelines, and the opportunities of implementing features - Achieved a 30% improvement in UI satisfaction ratings while collaborating with the design team to implement custom UI - Collaborated with QA to write and support UI tests, leading to a 50% decrease in bugs and a 20% increase in release stability - Designed a navigation layer and modules architecture using SwiftUI

- Developed delivery application that has more than 500,000 clients (CDEK) - Implemented authorization using an international phone number which made the application available worldwide - Designed a bash-script which helped to linter legacy code in specific files. That led to removing more than 60% of the project's warnings in 3 months - Discussed features from scratch with customers, designers, and backenders. Measured development time and divided features into tasks that could be assigned to a team

- Implemented from scratch and released 2 health applications ( Masimo Radius T - https://apps.apple.com/us/app/masimo-radius-t/id1537213321, Masimo Health - https://apps.apple.com/us/app/masimo-health/id6444578099 ) - Supported and delivered new features into the indoor framework for charts - Created lightweight markdown library - DownSwift (https://github.com/UsiantsevStepanSaritasa/DownSwift) which later was used in the company’s projects