KazancevE · Fullstack

Hi, I'm Egor Kazantsev

CRM, Telegram bots, and integrations — end to end

Telegram bots, CRMs, 1C and Bitrix24 integrations — from design to VPS deployment.

I take projects end to end — from design to deployment on VPS.

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Showcase projects: 13
Years of commercial experience: 5+

Services

Telegram bots end to end

Bots for sales, loyalty, and internal workflows: auth, roles, payments, and alerts.

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CRM and loyalty platforms

Internal portals, multi-tenant setups, and bonus mechanics for small businesses and branch networks.

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Integrations and automation

I connect systems without a friendly API: webhooks, exports, desktop robots, and microservices.

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Websites and landings

Public sites and cabinets with a clear structure, fast load, and a request form.

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About

Fullstack developer with 5+ years of commercial experience. Focused on business process automation: Telegram bots, system integrations, internal CRMs and client portals.

Worked on B2B and B2C projects — from small Telegram bots to full management systems with roles, notifications, and external integrations. I take on projects end to end: from scoping to VPS deployment. Quick to respond.

Beyond code

I teach IT to kids — I break down complex topics into simple steps.
Basketball — teamwork and quick decisions under pressure.
Arm wrestling — discipline and grit I bring into delivery.

Skills

Frontend

React

TypeScript

Redux

Tailwind CSS

Vite

Ant Design

Backend

Node.js

NestJS

Express

REST API

Webhooks

Telegram Bot API

Database

PostgreSQL

MongoDB

Prisma ORM

Integrations

1С

Битрикс24

Google Sheets

n8n

AWS S3

Infrastructure

Docker

Docker Compose

VPS

Git

Electron.js

Projects

Bystry Istok dental office

A private dental office site with priced services, a doctor page, reviews, and appointment requests. The dentist edits copy and reads new requests in the admin.

Next.jsPayload CMSTypeScriptPostgreSQL

Live demo

Bystry Istok travel guide

A district guide on the Ob: the Zolotukhin museum, weekend routes, fishing, and a stay catalog. Pages, places, and guest requests are edited in the admin.

Next.jsPrismaTypeScriptLeaflet

GitHub Live demo

Pressure sensor data automation

Desktop app built with Electron.js + Puppeteer to automate bulk data upload from Excel into a closed foreign government platform with no public API. Reduced 100-sensor entry from ~5 hours to minutes — manual work fully eliminated.

Node.jsExpressPuppeteerElectron.js

Corporate Telegram bot (ГК «АКТИВ»)

Telegram bot for ~100 employees: auth, 2-role model, auto-accrual of corporate currency, 1C and Bitrix24 integration via webhooks and HTTP services. Reduced request processing errors by ~60%.

Node.jsMongoDBTelegram Bot APIБитрикс241С

CRM and bots for an IT school

React + NestJS + PostgreSQL CRM for managing an IT school network: branches, groups and lesson slots. Telegram bot for parent notifications on payments and course access. Actively in development.

ReactTypeScriptNestJSPostgreSQLTelegram Bot API