Olga Zakharchuk

Built a B2B portal from the scratch, including system architecture, feature development, and core functionality implementation. Developed robust backend APIs using GraphQL to support a headless frontend. Led quality and architecture review for multiple offshore teams. Prevented critical production issues, enforce best practices. Worked extensively with microservices architecture, third-party APIs, payment gateways, and queue-based event-driven infrastructure. Partially covered Team Lead responsibilities

Project - Migration old Magento 1 website for French lingerie company to Magento 2 with Headless FE. - Implemented full migration from Magento 1.x to Magento 2.x, including custom module migration and adaptation of third-party modules to Magento 2 GraphQL. - Managed end-to-end migration cycle, including testing, debugging, and post-launch support. - Achieved less then 3% data lost during migration.

Website for custom handmade US jewelry company. High-load ($3mln revenue on Black Friday). - Translated business requirements into end-to-end solutions, covering design, architecture, frontend and backend development, deployment, and testing. - Integrated external APIs, including social media tools such as Facebook Pixel and Google Ads. - Developed BI reports to support data-driven business decisions.