Hello, I'm Alexey Romanov. Full-Stack Engineer modernizing complex business systems across frontend, backend, and cloud infrastructure.

Working on Supplai / O8 planning-engine infrastructure, a distributed inventory and supply-chain optimization platform for large-scale simulation and automated reorder planning. Inherited and took ownership of a complex Python/Rust planning engine and cloud orchestration platform, contributing across simulation logic, distributed execution pipelines, scalability, reliability, and infrastructure modernization. Built and improved distributed cloud execution infrastructure for parallel inventory simulations, including dynamic compute scaling, resilient worker orchestration, spot/on-demand execution strategies, automated provisioning, recovery behavior, and infrastructure cost efficiency.

Working on the modernization of O8 Enterprise Suite, an enterprise supply-chain planning platform used by global clients including Shell, BT, 3M, and others. Took ownership of frontend development after onboarding and expanded into a full-stack role, contributing across React architecture, reusable UI systems, Python backend modules, AWS tooling, and multiple enterprise applications. Modernized platform architecture by introducing shared frontend/backend infrastructure, scalable development patterns, enterprise data grids, D3-based analytics, permissions, user management, Lambda execution context, centralized error handling, and AWS-integrated services.

Owned end-to-end development of a custom CRM and internal operations platform for a Seattle-area cleaning company. Designed and implemented the full-stack system including database design, backend APIs, frontend workflows, role-based access control, real-time messaging, scheduling logic, booking flows, order lifecycle tracking, recurring cleanings, cleaner availability, employee assignments, dashboards, payment tracking, payroll calculations, expenses, tips, and financial reporting. Worked directly with the client to translate real cleaning-service operations into a centralized software platform.

Delivered multiple contract projects focused on advanced frontend systems, browser tooling, UI infrastructure, session replay, debugging tools, operational platforms, application analysis, and security testing. Built a session replay and debugging interface that reconstructed recorded HTML application states, including DOM change highlighting, HTML search, timeline navigation, and DevTools-style panels for Elements, Console, Network, and Sources. Also worked on content-protection platform UI development, legacy refactoring, reusable components, and security testing that identified a high-impact authorization vulnerability in a production SaaS platform.

Owned frontend development for a custom internal CRM used by a truck and trailer service company. Designed and built React and TypeScript workflows for service scheduling, customer and vehicle records, repair requests, warehouse operations, daily work assignments, dashboards, and technician-facing task visibility. Worked with the client, project manager, and backend developer to convert operational business rules into frontend application logic.

Owned full-stack development of an internal CRM and construction operations platform. Designed and implemented database structure, backend APIs, frontend workflows, role-based access control, employee management, project tracking, construction-site revision reporting, reporting automation, PDF generation, document management, archival tracking, and approval workflows. The platform digitized paper-based processes and centralized construction-site records for field teams and technical supervisors.

Worked on a CRM modernization project for a logistics and transport company within the Global Transport Investments / Formag group. Contributed to a React and TypeScript rewrite of a legacy CRM used across logistics operations, accounting, financial workflows, tax forms, notifications, statistics, reference data, multilingual interfaces, and internal tools. Progressed from bug fixes and UI maintenance to building reusable React components, Redux state management, form workflows, localization support, feature development, performance improvements, code reviews, and occasional frontend interview support.