HELLO WORLDPRG / 2001
IDENTITY / VERIFIED

GregoryKolens.

Senior AI Product Engineer

I turn complex AI and software systems into products people can actually use — and teams can reliably run in production.

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

What I bring to the table

A product mindset, senior engineering judgment, and enough range to move between the model, the backend, and the interface.

CASE / 01

AI product systems

Agentic workflows, LLM orchestration, RAG, structured outputs, evaluation loops, and human-in-the-loop delivery.

  • PYTHON
  • PYDANTIC AI
  • LLM
  • ASYNC
CASE / 02

Full-stack engineering

Production web applications and APIs designed for maintainability, performance, and a clear path from idea to release.

  • TYPESCRIPT
  • REACT
  • NEXT.JS
  • NODE.JS
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

Experience that ships

Recent work spans AI-native products, enterprise ML systems, and open-source developer tooling.

01
2024 — PRESENT

Co-founder & Lead Engineer

Dealyv

Built a production agentic system that qualifies real-estate leads across WhatsApp, email, and voice. It handles multi-turn conversations and routes structured results back into client CRMs.

02
2021 — PRESENT

Senior Technical Lead

PwC

Designing ML-driven data solutions and internal analytical products while guiding architecture, scalability, and engineering quality across workstreams.

03
OPEN SOURCE

Developer tools

GitHub / kolengri

Type-safe React APIs, controlled-concurrency utilities, routing helpers, and focused experiments built to remove friction from everyday engineering.

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

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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