Kibrom Hailay

Delivered responsive, consumer-facing application features using Next.js (App Router), TypeScript, React, and Tanish Stack Query, achieving 98+ Core Web Vitals on mobile and desktop. Built accessible, reusable UI component systems using Tailwind CSS and headless UI primitives to speed up feature delivery across product squads. Implemented client-side caching and optimistic UI updates to reduce perceived latency in unstable network conditions. Spearheaded rapid A/B testing using feature flags and measured conversion rate and retention metrics.

Architected and shipped mission-critical web applications and compliance platforms operating under strict 99.9% uptime SLAs. Established a modular front-end architecture and enforced strict TypeScript typing conventions across large codebases to reduce runtime errors and refactoring friction. Standardized automated end-to-end and unit testing pipelines using Cypress and Vitest with GitHub Actions to ensure reliable deployment gates. Collaborated closely with product managers, UX designers, and back-end engineers to scope and ship enterprise features autonomously. Integrated AI coding agent workflows to refactor legacy modules into modern typed abstractions with zero production incidents.

Engineered and maintained mobile apps and data collection workflows supporting over 6,000 field officers and 1,000,000+ smallholder farmers. Implemented robust offline-first caching mechanisms, conflict resolution algorithms, and background data synchronization for devices in low-connectivity rural environments. Optimized mobile app bundle sizes and memory footprint to ensure stable performance on low-end Android hardware. Integrated automated data pipelines connecting field collection systems to PostgreSQL analytics databases.