JFJakub Filipek
PL
Software / data / devices
Warsaw, PolandBusiness applications and IoT systems

Jakub Filipek

I build web applications, automation and solutions that connect systems with devices.

View projectsContact meGitHubLinkedIn
PlantFlow test setup with plants, sensors and a control moduleCurrently buildingDemo in progressWeb / Backend / Mobile / IoT / TestsPlantFlowView project
Specializations

From interface to device.

I combine application, data and software quality work with a hands-on approach to electronics and IoT systems.

01

Web applications

Interfaces, administration panels and applications built around data.

02

Backend and integrations

APIs, databases and connections between existing systems.

03

Test automation

End-to-end tests, integration verification and quality workflow improvements.

04

IoT and devices

ESP32 prototypes connecting sensors, controls and useful applications.

Selected work

Working results come first.

Each project explains the problem, technical decisions and outcome. Demos will launch directly from this site when their public versions are ready.

All projects
PlantFlow test setup with plants, sensors and a control module01Demo in progress
Web / Backend / Mobile / IoT / Tests2026

PlantFlow

An integrated crop monitoring and automated watering system connecting applications with ESP32 devices.

OutcomeA working data path from a physical sensor to the user interface

  • ASP.NET Core
  • React
  • React Native
  • PostgreSQL
  • ESP32
Demo in progressProject details
ESP32 sensor prototype used to monitor conditions around plants05Working prototype
Backend / IoT2025

Plant Climate

The Java-based predecessor to PlantFlow: a TCP server, desktop application and ESP32 sensors for plant monitoring.

OutcomeA working data path from physical sensors to a desktop application

  • Java 17
  • Swing
  • TCP sockets
  • CSV
  • ESP32
Working prototypeProject detailsSource code
Engineering highlights

Solutions validated in practice.

Selected parts of systems where code connects with devices, automation or rules that require a trusted environment.

01Sensor -> UI

Complete data path

Telemetry travels from physical devices through the API and PostgreSQL into web and mobile applications.

View the project028 zones

Modbus lighting control

Independent setpoints, power readings and PAR-based automation for a greenhouse installation.

View the project03Java + ESP32

Custom TCP communication

A server, text protocol, CSV history and physical sensors working as one system.

View the project04Cloud Functions

Trusted server-side logic

Moderation, point operations and security rules moved outside the client application.

View the project
Experience

Hands-on work with quality, integrations and data.

I combine professional experience with designing complete systems, from the device layer to the user interface.

  1. 07.2024 - present

    Application tester

    Atende Industries

    Developing and maintaining E2E tests, verifying REST and SOAP integrations, analyzing Oracle and PostgreSQL data and diagnosing issues in measurement data processing systems.

    • Cypress
    • REST
    • SOAP
    • Oracle
    • PostgreSQL
  2. 05.2023 - 07.2024

    Junior IT specialist

    JMP Flowers

    Supporting users and systems, diagnosing issues and building practical experience with infrastructure and IT processes.

    • IT support
    • Systems
    • Diagnostics
  3. 02.2023 - 06.2026

    BEng in Computer Science

    WSB - National Louis University

    Business application development specialization, with work across system design, databases and AI solution management.

    • Software engineering
    • Databases
    • AI
Services

Support for concrete technical problems.

I deliver focused applications, integrations, test automation and prototypes. Scope starts with the goal, the existing system and the way the result will actually be used.

Describe your project
  1. 01Web applications
  2. 02Administration panels and data visualization
  3. 03Test automation
  4. 04API integrations
  5. 05IoT prototypes
  6. 06Existing application development
Technologies

Tools grouped by purpose.

I select the stack for the problem. Projects and decisions matter more than a wall of library names.

Frontend

  • TypeScript
  • React
  • Astro
  • Flutter

Backend

  • ASP.NET Core
  • Java
  • Python
  • REST
  • SOAP

Automation and testing

  • Cypress
  • Vitest
  • xUnit
  • Docker
  • GitHub Actions

IoT and devices

  • ESP32
  • Arduino
  • Modbus
  • Sensors

Databases

  • PostgreSQL
  • Oracle
  • Firestore
  • SQL
Contact

Let us discuss a role or project.

Get in touch about a job opportunity, project, integration or technical collaboration.

Email directlycontact@jfilipek.comLinkedInjakub-filipek-check-it
LocationWarsaw, Poland

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