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Artem Kalinichenko

Software Engineer, Backend, Frontend, Web3, AI AutomationKyiv, Ukraine · Remote

ArtemKalinichenko.

Full-stack engineering across Backend, Frontend, Web3 and AI Automation — from database to deploy.

I build web systems, automation solutions, and Web3/FinTech applications — owning the full engineering process from database design and back-end systems to front-end applications and server installations.

See selected workGet in touch

01About

One engineer for the whole stack — and for what happens after launch.

Artem Kalinichenko, portrait
Kyiv, Ukraine · Remote

As a Software Engineer, I am responsible for building and creating web systems, automation solutions, and Web3/FinTech applications. I take on the full engineering process from database design and back-end systems to front-end applications and server installations, while making sure that the platform works well.

I am specifically interested in tooling that delivers the highest level of performance — such as an overall Google PageSpeed score above 95 or backend latency under 10ms.

My knowledge covers back-end development (Node.js / Nest.js, Python, PHP) and front-end development (Next.js, Svelte, React, Vue.js, Angular); REST, GraphQL and WebSocket APIs; event-driven systems on BullMQ and RabbitMQ; and databases (PostgreSQL, MySQL, Redis).

I work on Solidity smart contracts, algorithmic trading systems for CEX/DEX (Binance, Bybit, OKX, Uniswap, PancakeSwap), automation with CRM integrations (KeyCRM, marketplaces, payment systems), Telegram bots, distributed scrapers, and AI-based products.

I work AI-first, orchestrating role-based agents with Claude Code and Codex.

years in production
16+
Shipping web software since October 2010
Google PageSpeed
95+
Performance target for the sites I build
backend latency
<10ms
What I aim for on hot API paths

02Services

Four directions, one standard of engineering.

From CRM automation and trading bots to high-load platforms and fast websites — scoped pragmatically, built to last.

  1. 014 capabilities

    Business Automation & CRM Integrations

    KeyCRM wired into your websites, marketplaces, payments and shipping — with automation that removes manual work.

    • End-to-end KeyCRM integration with custom websites, marketplaces (Prom, Rozetka), payment gateways, and shipping providers.
    • Automated trigger flows, lead/order routing, end-to-end analytics, and bi-directional inventory synchronization via API.
    • Custom AI agents for first-line customer support and inbound lead qualification.
    • Multifunctional Telegram bots: sales funnels, integrated payments, and self-service customer portals.
  2. 023 capabilities

    Crypto Trading Bots & Web3 Engineering

    Algorithmic trading on CEX and DEX, EVM smart contracts, and full-stack dApps with wallet integrations.

    • Algorithmic trading bots for CEXs (Binance, Bybit, OKX) and DEXs (Uniswap, PancakeSwap) via REST, WebSockets, or direct on-chain interactions (Grid, DCA, arbitrage, scalping).
    • Solidity EVM smart contract development, testing, and deployment (tokenomics, staking, multi-tier referral programs, AMM liquidity pools).
    • Full-stack dApps with Web3 wallet integrations (MetaMask, WalletConnect).
  3. 033 capabilities

    High-Load Web Services, SaaS & Enterprise Platforms

    Production-grade SPAs, PWAs, portals and SaaS — with queues, real-time streams and tuned databases underneath.

    • Production-grade SPAs/PWAs, client portals, and SaaS solutions powered by Nest.js, Laravel, Svelte, Vue, or React.
    • Queue architectures (RabbitMQ, BullMQ) for compute-heavy background jobs and real-time data streaming via WebSockets.
    • Database optimization: schema normalization, complex SQL tuning, PostgreSQL indexing, and multi-layer Redis caching.
  4. 043 capabilities

    Turnkey Websites, Blogs & E-Commerce

    High-converting landing pages, blogs and stores engineered for technical SEO and 95+ performance scores.

    • High-converting landing pages, content blogs, and digital media platforms engineered for top-tier technical SEO.
    • Turnkey e-commerce development and customization on PrestaShop, OpenCart, and WooCommerce (custom payment gateways, shipping methods, and inventory sync).
    • Speed optimization and Core Web Vitals remediation targeting 95+ benchmark scores.

03Skills

A stack chosen for the problem, not the hype.

Backend, frontend, data, chain and automation — the tools I reach for, grouped the way projects use them.

  • TypeScript
  • Node.js
  • Nest.js
  • Next.js
  • React
  • Svelte
  • Vue.js
  • Angular
  • Python
  • PHP
  • Laravel
  • Solidity
  • PostgreSQL
  • Redis
  • RabbitMQ
  • BullMQ
  • GraphQL
  • WebSockets
  • Docker
  • KeyCRM
  • Claude API

  • Languages5

    • Node.js / TypeScript
    • Python
    • JavaScript
    • PHP
    • Solidity

  • Backend9

    • Nest.js
    • REST API
    • GraphQL
    • WebSockets
    • BullMQ
    • RabbitMQ
    • Symfony
    • Laravel
    • Yii

  • Frontend10

    • Next.js
    • Svelte
    • React
    • Vue.js
    • Angular
    • TypeScript
    • Vanilla JavaScript
    • Tailwind CSS
    • HTML5
    • CSS3

  • Databases4

    • PostgreSQL
    • MySQL
    • Redis
    • SQL

  • Web3 / Blockchain10

    • Solidity
    • EVM
    • JSON-RPC
    • Web3.js
    • Smart Contracts
    • AMM
    • Crypto Trading Bots (CEX/DEX)
    • Binance, Bybit, OKX
    • Uniswap, PancakeSwap
    • MetaMask / WalletConnect

  • CRM / E-commerce7

    • KeyCRM (API, webhooks, automation)
    • WordPress / WooCommerce
    • 1C-Bitrix
    • OpenCart
    • PrestaShop
    • Prom
    • Rozetka

  • Infrastructure5

    • Docker
    • Docker Compose
    • Git / GitHub
    • CI/CD
    • Unix/Linux

  • AI / Automation10

    • Claude API
    • Claude Code
    • Codex
    • ChatGPT
    • AI Agents
    • Multi-Agent Orchestration
    • Telegram Bots
    • Distributed Web Scraping
    • Webhooks
    • Data Migration & Sync

04Experience

Over a decade of shipping — in teams and independently.

  1. —

    Freelance · Remote

    Current

    Software Engineer · Freelance

    • Work with an AI-first approach: orchestrate agents with different roles, running Claude Code and Codex simultaneously and reviewing code with several different models.
    • Built full-stack applications end to end: backend in Node.js / Nest.js and PHP / Laravel, frontend in React, Next.js, Vue.js, Angular, and Svelte, with real-time data delivery over WebSockets.
    • Designed parallel background services and task queues for real-time data ingestion, idempotent event processing, and high-load traffic across independently scalable workers.
    • Developed Solidity smart contracts for EVM networks: ERC-20 token with a 7-level referral system, automated treasury management, reward distribution logic, and multi-tier incentive protocols.
    • Built automated trading / market-making software in Node.js for EVM networks: continuous on-chain data ingestion, order execution, and real-time volume support.
    • Developed an AI sales agent for a travel business that automatically detects customer intent and recommends relevant tours and services.
    • Delivered business automation and CRM integrations: end-to-end KeyCRM setup with custom websites, marketplaces (Prom, Rozetka), payment gateways, and shipping providers, including automated trigger flows, lead/order routing, and bi-directional inventory sync via API.
    • Optimized page load times and throughput on legacy systems, including horizontal scaling and Redis caching.

  2. —

    Evogence · Kyiv, Ukraine

    Backend Developer (PHP) · Evogence

    • Developed and maintained backend applications and APIs for terminal systems serving US-based clients.
    • Worked in a team using a Git pull-request workflow with code review and branching strategy.

  3. —

    Freelance · Remote

    Full-Stack Developer · Freelance

    • Built backend logic and APIs in PHP and Node.js with MySQL, implemented real-time features via WebSockets.
    • Managed diverse client projects independently: from data modeling and API design to frontend integration.

  4. —

    Genius Marketing · Kyiv, Ukraine

    Web Developer · Genius Marketing

    • Built landing pages and blogs, integrated WordPress sites.

  5. —

    Freelance · Remote

    Web Developer · Freelance

    • Worked continuously on a freelance basis (aside from the full-time roles), mainly doing website markup/layout and small PHP scripts.

  6. —

    Bitrix · Kyiv, Ukraine

    Web Developer · Bitrix

    • Developed websites based on the 1C-Bitrix CMS.

  7. —

    R25 Studio · Kyiv, Ukraine

    Web Developer · R25 Studio

    • Built website markup/layout and deployed sites on the DLE CMS.

05Selected work

Things I've built.

SaaS, on-chain systems, high-load web and bots — a cross-section of recent work.

  • SaaS / TypeScript Monorepo / Web3

    LandingCreator.ai

    SaaS platform where an AI agent builds landing pages — both Web3 token pages and regular websites — and publishes them on custom domains, with live on-chain market data (SSE price/candle/trade feeds), in-page swaps (PancakeSwap V2 on EVM, Raydium CPMM on Solana), and cross-chain payments via Heleket with automated treasury distribution. A TypeScript monorepo: Next.js frontend, NestJS/Fastify API, and eight independently scalable background workers sharing a framework-free domain layer, with server-side-only transaction signing and idempotent event handling throughout.

    • TypeScript
    • Next.js
    • NestJS
    • Fastify
    • SSE
    • PancakeSwap V2
    • Raydium CPMM
    • Solana
    • EVM
    Source on GitHub (opens in a new tab)

  • Blockchain / Web3 / Node.js

    Automated Market-Making Bot for EVM Networks

    A complete Node.js software solution for automated token buying/selling and trading volume support. Wallet creation, fund distribution, and custom trading rules. Compatible with all EVM networks (Ethereum, BNB, Polygon, Arbitrum); processes streaming market data in real time.

    • Node.js
    • EVM
    • Ethereum
    • BNB
    • Polygon
    • Arbitrum
    • Real-time data

    No public link

  • Blockchain / Solidity

    Referral EVM Smart Contract

    A fully functional token contract for any EVM network with nickname-based referral registration. Percentage accruals on every buy/sell by referrals across 7 levels with a claim mechanism. Two access tiers: Premium (7 levels) and Standard (3 levels). Fully tested.

    • Solidity
    • EVM
    • ERC-20
    • Referral system
    • Tested

    No public link

  • Web Development / Angular + Laravel

    Friends of Fashion — Highload Web Application

    Worked on a project built on the Angular + Laravel stack. Prepared the system for high load via horizontal scaling and Redis caching. Full cycle: architecture, backend API, frontend integration, and deployment.

    • Angular
    • Laravel
    • Redis
    • Horizontal scaling
    friendsoffashion.com.ua (opens in a new tab)

  • Telegram Bot / Python

    Giveaway Bot — @wizard_giveaway_bot

    A full-featured Telegram giveaway bot in Python (aiogram) with PostgreSQL storage, deployed as a systemd service. Configurable giveaway creation, two participation modes (button-click with anti-bot captcha, or keyword in comments), animated live winner draw, end-of-contest notifications, and public result verification.

    • Python
    • aiogram
    • PostgreSQL
    • systemd
    • Telegram
    Source on GitHub (opens in a new tab)Open in Telegram (opens in a new tab)

06Working principles

How I work.

  1. Full Ownership

    I dive straight into the business domain, select the most pragmatic tech stack without overengineering, and operate entirely without micromanagement.

  2. Long-Term Accountability

    I stand behind the software I build — troubleshooting bugs, refactoring legacy components, and scaling architecture as your business evolves over its entire lifecycle.

07Languages

Spoken & written.

Ukrainian
Native
English
Intermediatestrong written

08Contact

Have a system to build, automate or speed up? Let's talk.

artem21kalinichenko@gmail.com