Антон User

· Develop and maintain high‑load e‑commerce platforms using Symfony and Laravel.
· Design microservices for real‑time sync between internal systems and external APIs.
· Introduced spec‑driven development: OpenAPI 3.0 specs → auto‑generated stubs/SDKs – reduced integration bugs by ~30%.
· Implement contract testing (Pact/Postman) to ensure API compliance.
· Optimize DB queries and caching (Redis, M

· Developed and customized Bitrix24 and Bitrix CRM for enterprise clients across various industries.
· Designed and implemented complex business processes – automated order approval chains, lead routing, contract signing, and client onboarding.
· Built custom components, modules, and marketplace applications for Bitrix24 cloud and on‑premise.
· Integrated external systems via REST API – sync with

· Developed and maintained a network of high‑traffic online stores (20k+ daily visitors) using Symfony and Yii.
· Integrated Yandex.Market and Yandex.Direct APIs – built automated ad generation and bid management, increasing ROI by 15%.
· Created a product hub unifying inventory across storefronts, cutting data inconsistency by 90%.
· Wrote technical specs for SEO, design, and content teams; manag

· Developed e‑commerce websites, performed full data migration from Bitrix to MySQL architecture.
· Built internal services for order processing and delivery tracking.

· Built online stores from scratch using PHP, MySQL, JS, jQuery.
· Automated Yandex.Direct ad generation and bid management, saving 20% of marketing budget.

Created pixel-perfect HTML/CSS layouts and worked with JavaScript/jQuery for interactive elements, building a foundation for full-stack skills.

· Created pixel‑perfect HTML/CSS layouts, cross‑browser and responsive.
· Worked with JavaScript/jQuery for interactive elements – foundation for full‑stack skills.

Engineer in Radio Engineering degree from Vladimir State University from 2001 to 2006.