AI-assisted developer building web products, tools, and practical software with TypeScript, React, Python, and strong engineering foundations.

I enjoy turning early ideas into working products: designing flows, building interfaces, wiring APIs, shaping data models, and adding tests so the project can keep growing without falling apart.

• AI engineering and AI-assisted product development
• Strong software engineering foundations: data models, APIs, testing, architecture, and maintainability
• TypeScript, React, Next.js, Python, FastAPI, PostgreSQL
• Forward Deployed Engineering: turning messy business needs into working software close to users
• Marketplace, booking, admin, and CRM/ERP-like workflows
• Automation, evaluation harnesses, and practical developer tooling
• Business-aware engineering focused on useful products, speed, and measurable value

Kiddosy is a marketplace and booking platform for children's activities. It includes parent, organizer, and admin workflows across activity discovery, onboarding, offers, reservations, payments, invoices, attendance, waitlists, messaging, and dashboards.

Stack:

• Frontend: Next.js, React, TypeScript, Tailwind CSS, Zustand, Radix UI
• Backend: FastAPI, PostgreSQL, SQLAlchemy async, Redis, Stripe, Alembic
• Quality: pytest, Vitest, Playwright E2E, type checking, linting

I have contributed small product fixes to Open Mercato, an open-source AI-engineering framework for enterprise business applications.

• Fixed catalog list rendering by stripping markdown from product descriptions.
• Aligned customer seed data with dictionary values.
• Reported and followed through on reproducible product bugs via GitHub issues.
• Listed as a contributor in the Open Mercato v0.6.5 release.

• GitHub: https://github.com/Zamojski5
• Open Mercato: https://github.com/open-mercato/open-mercato