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Sergey Velikoretskikh

@sergeyvelikoretskikh

Full-Stack Software Engineer at Magnets USA building production LLM features, including an AI voice assistant and an open-source Claude Code review plugin.

United States

Message

At Magnets USA, I built a real-time AI voice assistant on the OpenAI Realtime API, with prompt guardrails and structured lead capture. I also connected AI agents to Microsoft 365, Vercel deployments, and internal systems through permission-scoped MCP servers.

I published an open-source Claude Code plugin for a two-agent implement-and-review workflow; 185 review runs produced 451 findings. I’ve also built production Next.js applications, including a multi-tenant landing-page builder and a single sign-on portal. I’m self-taught and have shipped software across TypeScript, Node.js, PHP, Angular, and ASP.NET.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Software Engineer

Current

Magnets USA

Jun 2024 - Present (2 years 4 months)

Built an AI voice assistant on the OpenAI Realtime API and connected AI agents to business systems via MCP. Developed a multi-tenant landing-page builder, SSO portal, and QR code platform, and maintained a private TypeScript library used by six applications.

TypeScript Next.js NodeJS OpenAI API MCP PostgreSQL MongoDB Drizzle ORM React Tailwind Zod Playwright GitHub Actions Vercel Docker Azure Sentry

Full-Stack Software Engineer

DASI

Oct 2022 - May 2024 (1 year 7 months)

Scaled an Angular monorepo with modular libraries and reusable components, and built RESTful APIs with ASP.NET and SQL Server. Practiced Agile/Scrum with design discussions, estimation, and peer code reviews.

Angular NgRX RxJS ASP.NET SQL Server Entity Framework Swagger OpenAPI Agile Scrum

JavaScript Developer

Integrify

Dec 2019 - Oct 2022 (2 years 10 months)

Helped build a full-stack web application with Node.js, Express.js, and Vue 2, and designed RESTful API endpoints and SQL queries. Practiced TDD with unit and end-to-end tests and resolved performance bottlenecks.

NodeJS ExpressJS Vue.Js Vuex SQL Test Driven Development BrowserStack

Full-Stack Web Developer

Omega Diamond

Dec 2018 - Oct 2019 (10 months)

Built and maintained a complete e-commerce platform from the ground up with Node.js and Angular, designed the PostgreSQL database, and integrated third-party shipping APIs for checkout.

NodeJS Angular PostgreSQL Ecommerce Shipping APIs