Anton Hordievskyi

Led a year-long SPA migration (monolith → React) across 150–200 pages, growing the engineering org from ~80 to ~250. Shaped migration sequencing, introduced react-query, typed API contracts, Zustand, and new error-handling patterns, becoming company-wide standards. Owned the final phase of the migration (error architecture) and achieved 2–3x page-load improvements on complex pages. Drove frontend standards across 9–15 teams (eslint config, TS conventions, library refactors, shared error handling). Identified and mitigated a DDoS-like hotspot in an OpenSearch cluster (96% CPU); reduced cluster from 7→5 nodes and cut infra costs ~50% ($2K→$1K/month) while preventing systemic failure. Pioneered code ownership with a broader org-wide rollout to GitLab migration. Delivered ~40 user stories across 7 releases (discovery + delivery) through close collaboration with PMs and beta community; replaced duplicative Python ML code with a Ruby monolith to accelerate delivery and maintainab

Led the frontend for an infrastructure/observability platform (CTO prototype → full product). Built 5 chart types (pie, bar, line, area, Grafana-like canvas) and a ~20-page UI; connected 5 Go microservices and helped scale the team from 3 to 15 engineers. Drove end-to-end delivery from initial concept to production, achieving a first production release in ~6 months. Recruited and onboarded the founding frontend team (2 engineers) and defined a 6-month product roadmap, translating business goals into engineering epics and delivering contracts.

Led a year-long jQuery → Vue.js migration across ~40 pages, achieving a ~50% bundle size reduction and smoother performance. Built internal CRM and inventory systems end-to-end from requirements to production, establishing a daily client feedback loop and owning the full product cycle. Demonstrated rapid growth from a self-taught junior to a team lead in under 3 years, and contributed to establishing early development practices and onboarding.