Andrii Chertkov

Greetings! I am a Full-stack JavaScript Developer with over 3 years of commercial experience in building high-load web applications and reliable backend architectures

I specialize in creating scalable systems, integrating complex payment solutions, and performance optimization

My Tech Stack:

• Backend: Node.js, NestJS, Express, Strapi, REST API, GraphQL

• Frontend / Mobile: React, Next.js, Redux Toolkit, React Native

• Databases: PostgreSQL, MongoDB, MySQL, Redis

• Integrations: Stripe (subscriptions, webhooks, custom payment logic), third-party API integrations

How I Can Help Your Business:

• Developing robust backend systems from scratch using NestJS/Node.js

• Building and customizing CMS systems (expert in Strapi architectures, custom plugin development)

• Setting up fault-tolerant payment ecosystems (Stripe, subscriptions, retry logic, webhooks)

• Optimizing application speed (proven track record of reducing page load time by 70%)

• Developing cross-platform mobile applications using React Native

Work Principles:

I write clean, maintainable code strictly adhering to KISS, DRY, and SOLID principles. I cover all critical business logic with tests to guarantee system stability under high loads

Always responsive, strictly dedicated to deadlines, and deeply focused on the client's business goals

Let's build an awesome product together!