Sergey Moiseev

Turbo Material is a library providing drop-in support for Material Design Components in Hotwire-enabled Rails applications. It provides users with needed Stimulus.js controllers for implementing a Material Design look and feel on such components and complex behaviors on top of Turbo frames.

As the lead architect and senior technical consultant, I led a multi-year, dual-phase modernization of ITU's core student and admissions platform. The project aimed to replace a legacy AngularJS system with a modern, scalable, high-performance solution to manage the student lifecycle.

In the 1st phase, I architected and built a new student portal (My.itu.edu) as an enterprise-scale Angular 14 monorepo using Nx, NgRx, and Material Design. This new platform included a complete, PCI-compliant payment system with Stripe, an advanced financial and academic records reporting engine, and PWA features for an enhanced mobile experience.

In the 2nd phase, I led the strategic migration of the entire platform from the Angular SPA to a modern Ruby on Rails 7 architecture using Hotwire (Turbo/Stimulus). This complex transition improved page load times and unified the front-end and back-end stacks for long-term maintainability. The project involved upgrading the core back end, modernizing the entire technology stack, and ensuring a seamless transition for thousands of students and staff.

Ruby on Rails-based corporate user experience extending existing end-user flows with business-oriented scenarios.

As a back-end developer, I was involved in all stages of active development, from early prototyping to post-release improvements.

As the technical lead for the front-end platform, I architected and drove the development of a large-scale Angular monorepo using Nx. This platform was the primary interface for all users, including contractors, property owners, and internal administrators.

I led a team of over 10 engineers to build and maintain eight distinct applications and over twenty shared libraries. Key applications included a contractor project management portal, a property owner dashboard, and complex financial calculators. My work involved implementing a robust NgRx state management strategy, creating a comprehensive shared component library, and integrating with over 15 back-end microservices for data, authentication (AWS Cognito), and real-time updates. I also led major framework migrations and implemented performance optimizations, such as code splitting and lazy loading, that reduced initial bundle sizes.

As the primary architect and developer for several core back-end services, I led the migration from a legacy monolithic application to a modern microservices architecture using Ruby on Rails. This initiative was critical for improving the scalability, reliability, and maintainability of the company's financing platform.

I was the sole architect and primary maintainer of the `income-service`, a mission-critical microservice responsible for all 3rd-party financial data integrations. I designed and implemented a provider-agnostic system to connect with Yodlee, Verix, and other financial data sources, handling secure data transformation, KMS-based encryption, and resilient, asynchronous job processing with Sidekiq. I also engineered the event-driven message bus for real-time data synchronization and implemented zero-downtime deployment strategies across all production environments.

I architected and led the development of two specialized back-end platforms that served as the central source of truth for all location-based and regulatory data, which were critical for determining financing eligibility and calculating terms.

The 1st platform, a location intelligence service, processed and served US Census TIGER geospatial data. I designed and built the system to handle complex spatial queries, address verification, and dynamic boundary generation for non-standard municipalities. The 2nd platform was a parameter management system that replaced a legacy service. I architected it using STI patterns to manage a hierarchy of different regulatory parameter types (e.g., rates, fees, rules) with a complete value inheritance and audit trail system. I also modernized the front-end interface using Hotwire (Turbo/Stimulus) and TailwindCSS for this service.

The Claude Skills Toolkit is a comprehensive skill suite I developed to transform knowledge of any kind into actionable skills for Claude Code. As the sole developer, I designed and implemented the entire system, including skills for creating and refining, packaging plugins, creating subagents, and implementing hooks.