Hrant Mailyan

Experience deploying and maintaining applications in Linux environments using Amazon EC2, S3, and Nginx. Worked with server configuration, SSL, file storage, deployments, monitoring, and performance tuning in production.

Experience working with Amazon RDS (PostgreSQL) in production environments. Managed database setup, migrations, backups, monitoring, and performance tuning. Worked closely with application code to ensure scalability, reliability, and data safety in cloud-based systems.

Implemented Elasticsearch for advanced search, filtering, and indexing large datasets. Experience with index design, queries, and synchronization between databases and Elasticsearch using background jobs.

Used Redis for caching, background jobs, session storage, and performance optimization. Implemented Redis to reduce database load and improve response times in production applications.

Developed chatbots and automation tools for Telegram and web platforms. Integrated bots with backend systems, databases, external APIs, and AI services. Focus on business automation, user flows, and reliability

Experience building responsive, mobile-first web interfaces using HTML5, CSS3, and JavaScript. Worked on integrating frontend components with backend APIs, form handling, client-side validation, and UI improvements. Strong focus on performance, usability, and cross-browser compatibility.

5+ years of professional experience with Ruby on Rails in production environments. Built REST and GraphQL APIs, authentication systems, background jobs, and integrations. Strong experience with performance tuning, code refactoring, and scaling Rails applications.

Experience working with MySQL databases for web and e-commerce applications. Designed schemas, wrote complex queries, optimized indexes, and handled migrations. Worked with high-traffic systems, data synchronization, and maintaining data integrity between services and external APIs.

Strong experience designing and optimizing PostgreSQL databases for high-load applications. Worked with complex schemas, indexes, migrations, and query optimization. Improved performance and data consistency in production systems.

Senior backend-focused engineer with 5+ years of experience building and maintaining scalable web applications and APIs. Strong focus on performance optimization, system reliability, security, and clean architecture. Experienced in improving existing production systems, refactoring legacy code, and integrating third-party services.

Built dynamic, data-driven websites with authentication, dashboards, admin panels, and API integrations. Focus on backend logic, performance, and maintainable architecture rather than simple static pages.

Built and maintained e-commerce platforms with integrations such as PayPal, Stripe, Authorize.Net, Apple Pay, and Google Pay. Experience with multi-variation products, checkout flows, admin panels, and API-based synchronization of products, inventory, and orders. Focus on secure payments and reliable systems.

I develop mobile-first and responsive web applications optimized for performance and usability across iOS and Android browsers. Experience includes building mobile web UIs, integrating REST/GraphQL APIs, authentication flows, payment integrations, and admin dashboards. Strong focus on performance, clean UX, accessibility, and cross-device compatibility.

I built and maintained an electronics e-commerce store end-to-end: product catalog, checkout, and admin panel. Integrated multiple payment gateways including PayPal, Authorize.Net, and Apple Pay / Google Pay. Implemented multi-variation products (options like color/storage/condition), inventory & price management in an admin panel, and automated product/order synchronization via APIs (import/export, updates, webhooks/cron sync). Focus on secure payments, clean UX, and reliable data consistency between systems.