PKFounding web developer Start a conversation

Founding web developer · Lisbon

I turn ambitious product ideas into systems that ship.

Product-minded full-stack development across Web2, Web3, and AI—from architecture and polished interfaces to backend systems and launch.

Discuss a product See selected work
  • Web2 products
  • Web3 systems
  • AI workflows

01 / Selected work

Product range, not a highlight reel.

Six builds chosen to show the breadth of what I can own: customer-facing products, internal operations, onchain flows, and reusable product systems.

01DeFi trading platform
RhoLabs product interface

Redesign + architecture + codebase unification

RhoLabs

Modernized an existing suite of trading apps through a full design update, frontend architecture renovation, codebase unification, new features, and ongoing product development.

  • TypeScript
  • React
  • Tailwind CSS
  • Shadcn UI
  • TurboRepo
  • CI/CD
  • Argo CD
  • Node.js
  • AWS
Visit live project
02Digital services platform
T-AI Land product interface

Customer portal + staff dashboard

T-AI Land

A full product for submitting requests, managing documents and appointments, tracking service progress, and operating staff workflows.

  • TypeScript
  • Nuxt
  • Vue
  • Docker
  • Tailwind CSS
Visit live project
03Operations platform
Adgem product interface

Product + admin + delivery pipeline

Adgem

A Telegram channel and advertising operations platform built from scratch through production, including administration and delivery infrastructure.

  • TypeScript
  • Next.js
  • React
  • Tailwind CSS
  • Prisma
Private product
04Web3 learning platform
UNCX Academy product interface

Product + content operations

UNCX Academy

An education platform for Web3 articles, videos, and learning resources, shipped with its content administration and delivery pipeline.

  • TypeScript
  • Nuxt
  • Vue
  • Tailwind CSS
  • Prisma
Visit live project
05Product design system
UNCX UI Kit library product interface

Reusable component library

UNCX UI Kit library

An internal React and Storybook component system for building consistent Web3 product interfaces.

  • TypeScript
  • React
  • Storybook
  • Tailwind CSS
  • Vercel
Visit live project
06Multi-chain DeFi platform
UNCX Network Rebranding product interface

Multi-product web presence

UNCX Network Rebranding

A reworked web platform for a multi-chain DeFi company with several products and a production content stack.

  • TypeScript
  • Nuxt
  • Vue
  • Tailwind CSS
  • Prisma
Visit live project
Full experience

The featured work is the short version. The complete archive covers 16 more products and platforms.

Complete body of work

Project archive

Earlier and additional work from the portfolio, across products, platforms, internal tools, and client delivery.

Kaleio project preview01

Kaleio

Made a landing page for Kaleio platform. It is a front page for a platform for trading natural diamonds NFT assets. Landing contains interesting animations, made using Framer Motion animation library.

  • TypeScript
  • Nuxt
  • Vue
  • Tailwind CSS
Visit project
Catbal Soulbound App project preview02

Catbal Soulbound App

Catbal is an app for minting soulbound tokens and managing gallery.

  • TypeScript
  • Next.js
  • React
  • Tailwind CSS
Visit project
Prefice project preview03

Prefice

Prefice is a DeFi tool for storing crypto token's data. One of UNCX Network projects. Includes login with crypto wallet and payments.

  • TypeScript
  • Nuxt
  • Vue
  • Tailwind CSS
Archive entry
UNCX Network project preview04

UNCX Network

UNCX Network is a multi-chain DeFi Services. It has several Web3 products. Main website was made using NuxtJS, GSAP and PrismaORM for blog.

  • TypeScript
  • Nuxt
  • Vue
  • Tailwind CSS
Archive entry
Uznay.ru project preview05

Uznay.ru

Uznay.ru is a platform with articles, lifehacks and other content. Project was made by me, from scratch to production. Except the admin console, which was made as a separate project. Both parts: client and admin's had a common Database and Prisma schema.

  • TypeScript
  • Vue
  • Nuxt
  • Prisma
Visit project
Nearpay project preview06

Nearpay

Nearpay is a part of Kikimora Labs group. We are releasing different projects in Near ecosystem. Some of them are: Fiat to crypto widget, B2B platform crypto to fiat, Crypto debit card.

  • TypeScript
  • Nuxt
  • Prisma
  • PostgreSQL
Visit project
Nearpay OnRamp Widget project preview07

Nearpay OnRamp Widget

Nearpay Widget is an on-ramp solution for buying crypto with debit card in a very simple flow.

  • TypeScript
  • Nuxt
  • Prisma
  • PostgreSQL
Visit project
TimeToEat project preview08

TimeToEat

TimeToEat is a platform for sport nutritionists. It takes users' measurements and provides counts and health recommendations. Whole project is made by me, from scratch to production. Including admin console for managing users, CI/CD pipelines, database, etc.

  • TypeScript
  • Nuxt
  • Prisma
  • PostgreSQL
Visit project
Embria project preview09

Embria

Our team has been built a multipurpose web portal for Venture Company. It includes startup mangement system, corporative news, chats, market analytics and CRM.

  • TypeScript
  • Vue
  • Vitest
Visit project
Yandex Alice Voice assistant skill project preview10

Yandex Alice Voice assistant skill

I've created a voice assistant skill for Yandex Alice as a pet project. It can can provide interesting facts about different countries. Contains skill itself and an admin console for managing countries ad facts.

  • TypeScript
  • Node.js
Visit project
Yandex project preview11

Yandex

An IT giant company with dozens of products. Our team has been created internal services for managers of company. It were very specific management interfaces and API's.

  • TypeScript
  • NestJS
  • React
  • gRPC
Visit project
PropellerAds project preview12

PropellerAds

I created interfaces for new projects in R&D department. It were traffic content sites with teasers, landing generator, quiz constructor, components for internal UI library.

  • TypeScript
  • React
  • Storybook
Visit project
GFaive ROI Calculator project preview13

GFaive ROI Calculator

A calculator for calculating ROI for Gfive. Web applications are made as a separate module for an existing WIX site. Made on ReactJS as an SPA.

  • TypeScript
  • React
Archive entry
Medici Housing Group project preview14

Medici Housing Group

Corporate website for a construction company. The site is made on VueJS and Wordpress Simple website based on modern technologies and with an excellent design by Alexey Semenov

  • TypeScript
  • Vue
Archive entry
Teaser Network SMI.FM project preview15

Teaser Network SMI.FM

Teaser network for traffic exchange. In addition to the news showcase, it is a service with a client administrative panel, analytics and customization of teaser blocks. Front: VueJS + Element UI, Backend: Laravel. I also wrote a script for rendering teaser blocks on any site using Preact

  • TypeScript
  • Vue
Archive entry
Build Home project preview16

Build Home

A one-page website for a company engaged in the repair of apartments and country houses. The site is made using ReactJS. Design by Alexey Semenov

  • TypeScript
  • React
Visit project

02 / Capabilities

One owner across the product surface.

The useful overlap is not a list of frameworks. It is the ability to move from an ambiguous product problem to a coherent system and a production release.

01

Founding product engineering

Shape the first production version with enough clarity and technical depth to keep evolving after launch.

  • Product architecture
  • Full-stack delivery
  • Design systems
  • CI/CD & testing
02

Web3 product systems

Turn protocol complexity into product flows people can understand, trust, and use across devices.

  • Wallet UX
  • Onchain integrations
  • Fintech interfaces
  • Multi-product platforms
03

AI workflows

Find where AI creates operational value, then connect models, APIs, guardrails, and human review.

  • Workflow design
  • Agentic automation
  • API orchestration
  • Human-in-the-loop

Delivery loop

  1. 01 Discovery
  2. 02 Architecture
  3. 03 Build
  4. 04 Iterate
03 / About
Pavel Kalchenko
Lisbon, PortugalProduct / engineering

Judgment before tooling

Technical depth with product context.

I build from the business problem outward. Before choosing a stack, I examine the product goal, operating context, budget, and delivery constraints.

My background includes Yandex, PropellerAds, venture and startup teams, crypto products, AI startups, SEO marketing, and hands-on IT team management. That range helps me connect interface quality with architecture, operations, and the reality of shipping.

Working toolkit

Product & UI
TypeScript · Vue / Nuxt · React / Next · React Native · Tailwind
Systems & data
Node.js · NestJS · Prisma · PostgreSQL · GraphQL · gRPC
Web3 & AI
Viem · Wagmi · wallet UX · OpenAI API · agentic workflows
Delivery
Docker · CI/CD · Vitest · Jest · Cypress · Storybook

04 / Field notes

Thinking beyond the build.

View all writing

05 / Start a conversation

Have an ambitious product and need someone who can own the web end to end?

Based in Lisbon, Portugal

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