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Hi, I'm Serhii

Web developer with 12+ years of experience, specializing in logic, algorithms, and design tasks. Building robust web applications with PHP, React.js, and Node.js — from CRM systems to real-time applications.

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Serhii Sulakov

About Me

Fullstack Developer with over 12 years of experience building web applications. Passionate about exact sciences — the more you understand physics, the less you believe in miracles. Specialize in PHP (Yii2), React.js, and Node.js — from CRM systems and real-time apps to payment integrations and browser automation. Led an IT department at SmartUm, managing developers and support teams. Based in Warsaw, Poland — working remotely with clients worldwide.

12+ Years

Experience

50+ Projects

Delivered

Team Lead

IT Department

Full Stack

Expertise

Skills & Technologies

Frontend

HTML/CSS/SCSS12 years

Bootstrap, Tailwind, Responsive

React8 years

SPA, hooks, Redux, Context API

TypeScript5 years

Strict typing, generics

Electron3 years

Desktop applications

React Native1 year

Expo, published to stores

Next.js1 year

SSR, SSG, API routes

Backend

PHP / Yii212 years

OOP, PSR, Laravel basics

MySQL12 years

Sequelize, query optimization

PostgreSQL6 years

TypeORM, complex queries

Node.js5 years

Express, NestJS, Socket.io

Strapi2 years

Headless CMS, REST & GraphQL

Python1 year

Flask, FastAPI, automation

DevOps & Tools

Docker5 years

Containerization, docker-compose

Nginx5 years

Reverse proxy, server config

CI/CD5 years

GitHub Actions, GitLab CI

Linux3 years

Server setup, CLI tools

Integrations

Payment Systems5 years

Stripe, PayPal, Liqpay, Cryptomus

Telegram API5 years

Bots, MTProto

WebRTC3 years

Video calls, Janus Gateway

OpenAI / Claude2 years

AI integrations

Work Experience

Fullstack Web Developer / Team Lead

2020 — Present

SmartUm

Team Lead of the IT department, managing developers and support teams. CRM development with PHP, JavaScript, MySQL. Built frontend applications with React.js, Next.js, Electron.js. Backend services with Node.js, Express, Socket.IO. System administration on Ubuntu.

PHPYii2React.jsNode.jsMySQLElectronSocket.IO

Fullstack Web Developer

2022 — 2024

Freelance

Worked with Strapi Headless CMS, Telegram bots, and Puppeteer. Developed APIs, integrated third-party services, payment systems, and optimized backend performance.

StrapiPuppeteerTelegram APINode.js

Fullstack Web Developer

2014 — 2020

Amakids

Full-cycle web development using PHP and JavaScript. Built server-side logic, APIs, and database management. Designed interactive interfaces and dynamic web components. Optimized MySQL queries for efficient data handling.

PHPJavaScriptMySQLHTML/CSS

Web Developer

2010 — 2014

Freelance

Started career as a freelance web developer. Built websites and web applications for various clients using PHP, JavaScript, and MySQL.

PHPJavaScriptMySQL

Get In Touch

Have a project in mind? Let's work together!

Contact Information

Email

s.sulacov@gmail.com

Phone

+380 96 621 86 21
+48 794 281 393

Location

Warsaw, Poland (Remote)

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