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yurich_hz

Yurii K

@yurich_hz

FullStack Developer

Polonia
Inglese, Ucraino, Russo
Alcune informazioni sono riportate in lingua inglese.
Chi sono
I am a Full-Stack Developer with 5 years of experience specializing in JavaScript, TypeScript, and Node.js. I have extensive expertise across the stack, including React, Next.js, .NET, and various database technologies like PostgreSQL and MongoDB. I am proficient in cloud platforms such as AWS, GCP, and Azure, and I am experienced in building scalable applications using Docker and Kubernetes.... Continua a leggere

Competenze

y
yurich_hz
Yurii K
offline • 
Tempo di risposta medio: 1 ora

Consulta i miei servizi

Applicazioni web full stack
I will build and fix nodejs nestjs apis and react web applications
A partire da50 USD / progettoMaggiori dettagli
Applicazioni web full stack
I will build asp net core rest apis and react web applications
A partire da50 USD / progettoMaggiori dettagli

Esperienza lavorativa

Onix

Onix

Full time • 2 yrs 10 mos

Full-Stack Developer | AI & SaaS Development

Nov 2025 - Present • 11 mos

I’m the sole developer of an AI-powered CRM and business operations platform, responsible for everything from architecture and database design to frontend development and production releases. I built lead management features, automated workflows, and AI-powered document generation using RAG, OpenAI, and Anthropic APIs. I also integrated Google Drive, Notion, Dropbox, and SharePoint, including OAuth authentication and token management. For billing, I implemented Stripe subscriptions with proration and webhook handling. The CRM improvements increased lead qualification efficiency by 20%, and the document integrations handle over 1,000 imports per month.

Full-Stack Developer | Shopify & E-commerce

Oct 2024 - Nov 2025 • 1 yr 1 mo

I worked on a Shopify cosmetics storefront built with React, Remix, Shopify Hydrogen, and Sanity CMS. My work included product pages, customer accounts, store locators, loyalty features, and reusable UI components. One of the main improvements was reducing average route response time from 1,200 ms to 150 ms. I achieved this by caching Sanity content in Upstash Redis and adding webhook-based cache invalidation. I also created reusable CMS components that allowed the content team to manage over 50 pages without developer changes. The storefront updates helped increase user engagement by 25%.

Full-Stack Developer | Analytics & Reporting

Sep 2024 - Jul 2025 • 10 mos

I developed sales analytics and reporting features using Next.js, NestJS, PostgreSQL, and Google BigQuery. The work included sales reports, data filtering, pagination, CSV exports, and handling date ranges across different time zones. One of the reports originally took around 55 seconds to run. I rewrote the SQL queries to process over 500,000 order line items more efficiently, reducing execution time to 8 seconds. I also implemented configurable product recommendation rules and role-based access controls.