PR_TITLE
merged

feat: senior frontend engineer

I ship products to production. Code first, everything else when needed.

reactnext.jstypescriptnode.js
products shipped
0
years coding
0+
technologies
0+
denis-dev.jpg771×1028
Denis Kukobin
Description

Frontend developer who doesn't stop at 'UI is done'. 8+ products shipped to production: from social networks to a DEX on a custom L2 Ethereum. In 2024 I built an LLM chat with MCP agents — when agentic AI wasn't yet mainstream. React/Next.js is my core, Node.js backend when needed, can read and fix Go. I know what production looks like from the inside — because I've shipped there myself.

Files Changed
  • src/projects/papiny-skazki.tsx+2,100

    Papiny Skazki

    Bedtime story service for parents: the AI generates a new story every day from a short description. Next.js, Supabase, SCSS — solo from idea to deploy.

    • Next.js
    • Supabase
    • OpenAI
    • SCSS
  • src/projects/llm-chat.tsx+3,400

    LLM Chat + MCP Agents

    LLM chat with external MCP servers from GitHub and custom agent creation — built in 2024, a year before agentic AI became the mainstream topic.

    • React
    • Node.js
    • MCP
    • LLM
  • src/projects/dex-l2.tsx+4,800

    DEX on L2 Ethereum

    Token swap platform on a custom Layer 2 blockchain. Full cycle: React UI, smart contract integration via Ethers.js, production deployment.

    • React
    • Web3
    • Ethers.js
    • L2
  • src/projects/sprint-board.tsx+1,840

    Sprint Board

    Internal dashboard with Jira API: sprint progress, team workload, real-time metrics. Built over a weekend — the whole company still uses it.

    • Next.js
    • TypeScript
    • Jira API
Diff

Frontend

React / Next.js100%
TypeScript88%
Tailwind CSS / SCSS85%
Framer Motion75%

Backend & Web3

Node.js / Express75%
Supabase / BaaS78%
Web3 / Ethers.js70%
Go / Python (read & fix)60%
  • React
  • Next.js
  • TypeScript
  • Tailwind CSS
  • SCSS
  • Supabase
  • Framer Motion
  • MDX
  • Node.js
  • Web3
  • Ethers.js
  • OpenAI API
  • PostgreSQL
  • Git
  • Figma
  • Cursor IDE
Commits
  1. 2020

    feat: first commercial React app @ VegaAvangard

    CRM system in React for a company that had no frontend before. First production, first real deadline — both shipped.

  2. 2021–2024

    feat: 5+ products shipped @ Aurora Infinity

    DEX on custom L2 Ethereum, crypto investor social network, writers media platform, LLM chat with MCP agents. Each one: full cycle from design to production.

  3. 2025

    feat: internal tooling + AI integrations @ SprutGaming

    Sprint Board for the entire company, AI pipelines, internal tools. Projects that are actually used — not gathering dust in Confluence.

  4. 2026

    feat: public tech-leader launch (this PR)

    This portfolio on Next.js 16 + Framer Motion. Papiny Skazki. Going public — because it's time to build a personal brand.

Checks
  • ✓8+ products shipped to production — solopassed
  • ✓Senior Frontend Engineer (React, Next.js, TypeScript)passed
  • ✓LLM agents + MCP — before the mainstream hype (2024)passed
  • ✓DEX on custom L2 Ethereum (React + Ethers.js)passed
  • ◎Open Source contributionsin progress
Attachments