HELLO WORLDPRG / 2001
IDENTITY / VERIFIED

GregoryKolens.

Senior / Lead Software Engineer

AI platforms and full-stack products, built on 10+ years of enterprise engineering. I design React application architecture and build AI products and developer tools with TypeScript and Node.js.

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PRAGUE, CZECHIAAVAILABLE FOR SELECT WORK
SUBJECT / GK-13Illustrated full-length portrait of Gregory Kolens as a night stewardENGINEER / BUILDER / 10+ YRS
10+Years in production
AI × WEBEnd-to-end products
ENTERPRISEInsurance & banking
PRAGUEBased in Czechia
CAPABILITY DOSSIER / 01

What I bring to the table

Hands-on architecture, implementation and mentoring across enterprise applications, AI integrations and developer tooling.

CASE / 01

AI platforms & developer tools

LLM integrations, AI-assisted testing, model evaluation, observability, and Office automation for enterprise products.

  • TYPESCRIPT
  • MCP
  • PLAYWRIGHT
  • OFFICE.JS
CASE / 02

Full-stack engineering

React application architecture, micro-frontends, typed API contracts, and full-stack features across insurance, banking, and AI products.

  • REACT
  • NEXT.JS
  • NODE.JS
  • SPRING BOOT
CASE / 03

Technical leadership

Architecture, mentoring, delivery planning, and cross-functional product decisions grounded in more than a decade of practice.

  • ARCHITECTURE
  • PRODUCT
  • MENTORING
SELECTED RECORD / 02

Professional experience

Parallel work across insurance platforms and enterprise AI products, from application architecture to implementation.

01
AUG 2023 — PRESENT / CONCURRENT ROLE

Frontend Developer → Full-Stack Developer

Kooperativa pojišťovna (VIG)

Designed the React application architecture for the Neuron Policy domain from the start, working in a small team on insurance-contract lifecycle management for Kooperativa and ČPP. Developed policy search, cancellation and signing workflows, Tasklist micro-frontends, and full-stack features with Java and Spring Boot.

02
OCT 2021 — PRESENT / CURRENT TITLE SINCE JAN 2022

Senior Technical Lead, AI Engineer

PwC

Lead engineering across financial, tax and AI products, including a React and Nx platform with 21 AI micro-frontends. Created and led Specwright, combining source-code analysis, browser automation and LLM integrations to generate deterministic Playwright tests. Principal developer of an AI-powered Excel and PowerPoint add-in using Office.js.

Earlier chapters include senior engineering and leadership roles at Shoptet, Creative Dock, Home Credit International, DHL IT Services, CEMEX / NEORIS, and KESSO.

SELECTED PROJECTS / 03

Side projects

AI product development, industrial data collection and mobile engineering.

PROJECT / 01

Dealyv

AI real-estate platform. Contribute to architecture and implementation of lead qualification and follow-up workflows, with model evaluation, observability and scheduled agents.

  • TYPESCRIPT
  • NEXT.JS
  • VERCEL AI SDK
  • LANGFUSE
  • CLOUDFLARE
  • tRPC
  • POSTGRESQL / NEON
PROJECT / 02

Hey Foods

AI customer feedback project. Built an LLM-based system to analyse restaurant reviews and identify recurring complaints and operational themes.

  • LLM
  • CUSTOMER FEEDBACK
  • TEXT ANALYSIS
PROJECT / 03

Honeywell Safety Console

Developed frontend and backend components to collect data from noise-cancelling headphones and monitor the hearing load of industrial workers.

  • REACTJS
  • NODEJS
  • TYPESCRIPT
  • REDUX
  • WEBPACK
  • GOOGLE CLOUD
PROJECT / 04

Honeywell PNP

Contributed mobile development and team mentoring for an application that synchronises and collects data from noise-cancelling headphones.

  • REACT NATIVE
  • REDUX
  • GOOGLE CLOUD
  • REST API
BACKGROUND / 04

Education & resume

Two-page resumes with professional experience, selected projects and technical skills.

Yandex Practicum — Data Science Extended, Sep 2024–2025 (completed).
VSO in Prague — IT in Tourism, 2014–2015.
CVUT in Prague — IT Development, 2010–2013.
Languages: Russian — Native; English — B2; Czech — B2.

Professional CV (PDF)
OPEN SOURCE SIGNAL

Small tools. Sharp edges removed.

worker-batcherControlled concurrencyreact-slot-componentType-safe React slotsformik-persist-valuesPersistent form state
NEXT TRANSMISSION

Building something difficult?

Let’s turn it into a system that works beyond the demo.

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