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pfirsowicz/README.md

Pawel Firsowicz

Software Engineer | Backend Systems, APIs & Systems Integration

Personal website · LinkedIn

I'm a software engineer focused on backend systems, APIs and systems integration. Alongside my professional work, I build and maintain independent software applications that support practical, real-world workflows.

What I work on

  • Backend development — APIs, business logic and database-backed applications.
  • Systems integration — connecting services, applications and data.
  • Full-stack applications — building practical tools from frontend to backend.
  • Deployment and operations — hosting, maintaining and improving applications in production.

Selected personal projects

Water Allowance Tracker — A full-stack Node.js, Express and MySQL application for tracking meter readings and water allowances. Includes API validation, automated tests and a responsive dashboard.

Try the synthetic-data demo.

HiveLedger — Beekeeping Operations — An independent, synthetic-data application demonstrating colony inspections, follow-ups and traceable relocations. Uses JavaScript domain logic, a local Node.js API, SQLite transactions and automated tests.

Try the demo.

Pinned Loading

  1. water-allowance-tracker water-allowance-tracker Public

    Full-stack water usage tracker with Express, MySQL, automated tests and an interactive demo.

    JavaScript

  2. beekeeping-operations-demo beekeeping-operations-demo Public

    A beekeeping operations demo featuring colony inspections, lifecycle events, transactional SQLite and automated tests.

    JavaScript