Technical articles about engineering, management, and tech life from a tech lead who builds systems that don't break at 3am.https://yoana.tech/en-ushttps://yoana.tech/blog/how-z-index-broke-ios-status-bar/https://yoana.tech/blog/how-z-index-broke-ios-status-bar/A nearly invisible CSS overlay with z-index: 9999 caused content to bleed through the iOS Safari status bar. Seven failed fix attempts later, here's what actually worked.Sat, 07 Feb 2026 00:00:00 GMTEngineeringCSSiOSSafariDebuggingFrontendYoana Borissovahttps://yoana.tech/blog/angular-signals-future/https://yoana.tech/blog/angular-signals-future/A deep dive into Angular's reactive primitive that's changing how we think about state management and change detection.Fri, 06 Feb 2026 00:00:00 GMTEngineeringAngularSignalsReactive ProgrammingState ManagementAngular 21Yoana Borissovahttps://yoana.tech/blog/cloud-agnostic-infrastructure-case-study/https://yoana.tech/blog/cloud-agnostic-infrastructure-case-study/How separating infrastructure provisioning from configuration management made switching cloud providers effortless—no vendor lock-in, no complexity.Mon, 15 Sep 2025 00:00:00 GMTEngineeringDevOpsTerraformAnsibleInfrastructureCloudYoana Borissovahttps://yoana.tech/blog/ai-prompters-are-not-professionals/https://yoana.tech/blog/ai-prompters-are-not-professionals/On AI hype, fake experts, and why dumb prompts will always produce dumb output—no matter how advanced the model.Wed, 18 Jun 2025 00:00:00 GMTBeyond TechAICareerLearningHot TakesYoana Borissovahttps://yoana.tech/blog/junior-mindset-trap/https://yoana.tech/blog/junior-mindset-trap/Lessons from Bulgarian history about mentorship, growth, and why 'junior developer' should be a stage, not an identity.Sat, 24 May 2025 00:00:00 GMTManagementCareer GrowthMentorshipJunior DevelopersLeadershipYoana Borissova