PERSONALIZE YOUR WORKSPACE

Make yourself at home.

Same portfolio. Your preferred view.

Color theme
Background particles
Saved on this device
KK
Karol KarnasFull-stack Engineer
TOOLBOX / HOW I BUILD

Good systems.
The right tools.

Full-stack engineering, from interface to infrastructure.
A practical stack for building, testing and delivering the whole feature.

See these tools at work
01

Frontend engineering

06

Interfaces, application state and complete user journeys.

  • React
  • Next.js
  • Redux
  • HTMX
  • Tailwind
  • SASS
02

Backend engineering

07

APIs, business rules, async workers and data workflows.

  • Django
  • FastAPI
  • Celery
  • Pandas
  • pytest
  • Jupyter
  • OpenAI API
03

Data & infrastructure

07

Databases, containers and the cloud services behind a release.

  • AWS
  • Azure
  • Docker
  • PostgreSQL
  • SQL
  • Redis
  • Linux
04

Testing & quality

04

Check the API, the worker and the user journey together.

  • pytest
  • Playwright
  • Postman
  • Insomnia
05

Observability

05

Trace failures across the interface, worker and integration.

  • Sentry
  • Datadog
  • Grafana
  • Langfuse
  • Flower
06

Languages & workflow

09

Python, TypeScript and the tools for planning and shipping work.

  • Python
  • TypeScript
  • JavaScript
  • VSC
  • Git
  • GitHub
  • Jira
  • Confluence
  • Claude
CONNECTING THE DOTS

AI, connected to the product.

Retrieval, embeddings and model APIs built into usable workflows.

  • pgvector
  • sentence-transformers
  • RAG
  • LLM API Integration
  • Agentic Pipelines
  • Vision-Language Models
main00
Ln 1, Col 1Spaces: 2UTF-8SVG