Oleh Derkachov

Led iOS development remotely for a digital sports media and fan community platform focused on soccer coverage and discussion. Managed a team of developers and QA specialists to ship 19 new mobile applications for a product with 1,000,000+ MAU. Implemented Tuist binary caching for Swift project builds, reducing total build time by 80%. Built a custom Firebase Remote Configuration management tool in Python with Slack integration, cutting time per configuration change by 90%. Created module scaffolding templates (architecture, DI wiring, routing, tests, and folder structure), making end-to-end module creation and integration 95% faster. Built a native paywall builder integrated with Adapty to standardize paywall composition, reducing new paywall integration time by 75%.

Movix - streaming & TV entertainment platform providing on-demand video content and live TV channels across mobile and TV devices. Designed scalable UI-test architecture reducing UI-test development time by 60%. Extracted reusable UI components into a shared design system, reducing duplication and speeding up new screen development by 20%. Refactored core screens to modernize architecture and UI components; mentored junior iOS developers through code reviews and pairing, improving code quality.

Integrated Kotlin Multiplatform into the iOS codebase to reuse shared business logic, accelerating delivery of selected screens and reducing duplicate implementation. Introduced a developer mode that gave engineers and QA quick access to advanced debug tools, shortening test cycles and saving 30 minutes of coordination time per issue. Mentored trainees and organized iOS knowledge-sharing lectures, strengthening technical culture.