kbilokopytov

• Have owned frontend architecture, delivery, and CI/CD for two products at Scale Final: a media-buyer analytics platform and a multi-tenant entertainment platform. Performance Marketing Tracking Platform • Architected and delivered an advanced reporting system for media buyers supporting flexible filter combinations, multi-level grouping, and configurable data views. • Migrated the project to pnpm and optimized GitHub Actions workflows, cutting CI/CD execution time from ~20 minutes to under 10 minutes and reducing monthly CI runner costs by ~50%. • Mentored 2 Angular engineers transitioning to React and TypeScript, ran 15–20 company-wide technical interviews, and led knowledge-sharing sessions on AI-assisted development. Confidential Multi-Tenant B2C Entertainment Platform (NDA) • Owned architecture and end-to-end delivery of a back-office CMS within a cross-functional team of frontend/backend engineers, QA, design, and product. • Designed the bonus-engine feature for the customer-facing app and built the NestJS-based BFF layer, implementing APIs and workflows for the admin platform. • Established multi-tenant architecture with a layered feature-flag system, organizing the app, back office, and shared libraries in an Nx monorepo. • Set up CI/CD and introduced Playwright E2E testing, achieving 100% automated coverage of all agreed critical user journeys. • Built a Go CLI that automates repository setup, service orchestration, database and CMS seeding, and Kafka event mocking, cutting local environment setup to a single command.

• Recruited to recover a legacy trading application blocked by an outdated dependency tree and Webpack 4; resolved the core issues and upgraded to Webpack 5 (and the dependencies it required) to unblock both WebAssembly integration and active development. • Led its modernization into a Progressive Web App and integrated WebAssembly to run trading-pair and exchange-rate calculations efficiently in the browser. • Drove the recovered application through production readiness and launched it to users.

• Architected an internal administration platform from scratch using React and TypeScript, with a feature-based architecture, reusable UI components, and a fully typed API layer. • Implemented state-heavy workflows for money-transfer operations, separating domain logic, server state, validation, and presentation to improve maintainability. • Introduced unit testing and CI/CD pipelines for automated validation, builds, and deployments; mentored a backend engineer into the frontend codebase. • Developed a public-facing website with Next.js and improved its Lighthouse Performance score from the 60s to the 90s through bundle, rendering, and asset optimization.

• Contributed to the incremental migration of Salesloft's customer-facing application from AngularJS to React and TypeScript, building reusable components and gradually replacing legacy modules. • Developed workflows for managing accounts, users, teams, roles, phone-number provisioning, and platform configuration.

• Developed checkout and payment workflows for hotel-booking platforms using the Stripe API, including validation, confirmation, error handling, and recovery states. • Built a React and TypeScript application for cruise liners supporting core operational workflows under limited or unavailable internet connectivity, with local persistence and sync to preserve state on reconnect.

• Built content-driven websites with Gatsby and React to attract organic traffic and direct visitors to Shopify storefronts, using reusable templates for articles, categories, and promo pages. • Improved technical SEO and page performance through static generation, optimized images, structured metadata, and analytics/conversion tracking.