kdev.
Next.jsReactTypeScriptTailwindNode.jsPostgreSQLDockerCI/CDREST APIGraphQLRedisFigmaUI/UXSSRSSGWebSocketOAuthJWT
WEB DEVELOPMENT

I build websites that work for your business

Premium web development with modern technologies, clean design, and focus on results. From concept to launch.

Next.js — React — TypeScript — Tailwind CSS — Node.js — PostgreSQL — Docker — Figma — Framer Motion — Redis — CI/CD — GraphQL — REST API — Linux — Python — Next.js — React — TypeScript — Tailwind CSS — Node.js — PostgreSQL — Docker — Figma — Framer Motion — Redis — CI/CD — GraphQL — REST API — Linux — Python —
PROBLEMS

Sound Familiar?

If at least one of these applies to you — let's talk

01

You have a website but it doesn't bring clients

Beautiful design alone is not enough. You need a website that works as a sales tool and converts visitors into customers.

02

Your design is outdated and doesn't inspire trust

First impressions matter. A dated interface drives potential clients to your competitors before they even read your offer.

03

You need a product but don't know where to start

From idea to launch — I'll guide you through the entire process, from strategy and design to development and deployment.

04

Your current team can't deliver the quality you need

Premium results require premium expertise. I bring both design thinking and technical execution to deliver world-class digital products.

05

Your website is slow and loses visitors

Speed matters. Every extra second of loading costs you conversions, kills search rankings, and drives impatient users away.

06

You've been burned by freelancers

Missed deadlines, poor communication, half-finished projects. You need a reliable partner who delivers on promises and stays accountable.

PROCESS

How I Work

01

Briefing

Understanding goals, audience, and business context

02

Architecture

Designing structure, choosing stack, and building a plan

03

Development

Iterative development with tests, reviews and transparency

04

Scaling

Optimize, document, handover. System works without me.

TECH STACK

Technologies I Use

Frontend

React, Next.js, TypeScript, Tailwind CSS

ReactNext.jsTypeScriptTailwind

Backend

Node.js, Ruby on Rails, PostgreSQL, Redis

Node.jsRuby on RailsPostgreSQLRedis

DevOps

Docker, CI/CD, Nginx, Linux

DockerCI/CDNginxLinux

Design

Figma, Motion Design, UI/UX

FigmaFramer MotionUI/UX

AI Tools

Claude, GPT, Copilot, Cursor

ClaudeGPTCopilotCursor

Analytics

Google Analytics, Mixpanel, Datadog, Hotjar

GA4MixpanelDatadogHotjar
AI APPROACH

AI Is My Tool, Not a Replacement

I use AI to accelerate development, automate routine tasks, and deliver faster — while every architectural decision, design choice, and line of code is reviewed and owned by me.

AI-Enhanced Workflow

  • Code generation & review
  • Automated testing
  • Design prototyping
  • Content optimization
PORTFOLIO

Selected Cases

01

4stay — Accommodation Platform

Full stack development of an international accommodation booking platform with real-time chat, Stripe payments, and a customizable landing page builder.

Real-time chat via GraphQL subscriptions
Stripe integration: payments, subscriptions, payouts
Custom landing page builder for hosts
Migration from Paperclip to Active Storage at scale
Ruby on RailsReactGraphQLAWS
02

Fintech Matching Platform

Lead processing platform that matches clients with financial advisors through scoring models, ranking algorithms, and integrations with 10+ external services.

~30K leads processed through matching engine
10+ integrations: HubSpot, Salesforce, Twilio, etc.
80% backend test coverage
Google Cloud infrastructure: Cloud Run, Load Balancer
Node.jsTypeScriptReactPostgreSQL
03

NFT Marketplace

Full-cycle development of an NFT marketplace with real-time auctions, media storage on IPFS, and a flexible GraphQL API for asset management.

Real-time auction system via WebSocket
Decentralized media storage on IPFS
GraphQL API with Apollo for flexible data queries
Secure asset management and ownership transfer
Ruby on RailsNext.jsGraphQLIPFS
04

Legal Video Platform

Secure platform for scheduling and conducting encrypted video consultations between lawyers and clients with confidential recording archiving.

End-to-end encrypted video calls via WebRTC
Appointment scheduling and calendar integration
Confidential meeting recording archive
Full compliance with legal data privacy standards
Ruby on RailsWebRTCPostgreSQLJavaScript
Ivan Kuzhelev
ABOUT

About Me

Programming hooked me back in school, and over the years it became a conscious career choice. I enjoy understanding the full cycle — from idea and architecture to production and scaling.

With 7+ years of commercial development, I've worked on SaaS platforms, fintech, NFT marketplaces, legal and event platforms. Processing tens of thousands of leads, building real-time systems, designing scalable architectures.

I work with international teams remotely. I dive into business logic, make architectural decisions, and become part of the team — a partner, not just an executor. Code quality matters to me as much as speed. Master's degree in Software Engineering with honors.

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YEARS OF EXPERIENCE

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INTEGRATIONS BUILT

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PRODUCTION PROJECTS

CONTACT

Let's Build Something Great

Have a project in mind? Let's discuss how I can help bring your vision to life.