Petro Gordiievych
Private message 
Tallin,
Estonia
available for hire
Rating
Language proficiency level
English: fluent
Українська: fluent
Русский: fluent
Skills and abilities
Programming
- AI & Machine Learning
- Bot Development
- C & C++
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Data Parsing
from 47 USD for hour
- Databases & SQL
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Desktop Apps
from 47 USD for hour
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Embedded Systems & Microcontrollers
from 76 USD for hour
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Java
from 23 USD for hour
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Javascript and Typescript
from 47 USD for hour
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Python
from 47 USD for hour
- Web Programming
Design & art
Services
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AI Consulting
from 58 USD for hour
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Data Processing
from 47 USD for hour
- Enterprise Resource Planning (ERP)
- Information Gathering
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Payment Systems Integration
from 47 USD for hour
Mobile development
- App Development for Android
- Apps for iOS (iPhone and iPad)
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Hybrid Mobile Apps
from 47 USD for hour
Administration
Outsourcing & consulting
Portfolio
- All works 8
- Java 1
- Web Programming 1
- Desktop Apps 2
- Apps for iOS (iPhone and iPad) 2
- AI & Machine Learning 1
- Embedded Systems & Microcontrollers 1
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25 000 USD LLMs management portal
AI & Machine Learning
Last month, one of our teams finished developing an LLM management portal. In this post, I’ll briefly describe this SaaS solution, the time we spent on development, the technologies we used, and provide a link to the development environment.
Our customer had already created an LLM management environment. It allows users to run and train LLMs, feed prompts, and get responses. It is mostly used by educational platforms such as OpenEdx. Owners of such platforms can train LLMs by feeding them books and courses, use them to teach, and test students with quizzes generated by the LLM. All interaction happens through a chatbot that acts as a tutor. In short, this is a sophisticated tool that easily integrates into existing educational platforms.
… The client’s request was to develop a platform where their customers would be able to add their own LLMs, use predefined models, run training, and customize bot behavior on educational sites. The platform also needed to support payments and subscriptions. The entire development process—from design to final delivery—had to be completed within two months.
Due to the very limited timeframe, we chose the tech stack we were most familiar with:
- Backend: jHipster on Java 23 (we usually prefer Kotlin for backend development, but kHipster is not yet up to date with jHipster).
- Database: PostgreSQL
- Frontend: Angular web app
- Payment gateway: Stripe
- CI/CD: GitHub Actions
- Deployment: Docker image, runnable via Docker Compose or Kubernetes
- Ticketing system: Jira
- Documentation: Confluence
- Team communication: Slack
- Customer communication: Telegram
In six weeks, we completed the application, and then spent two weeks on integration, testing, and fine-tuning. The team consisted of one backend developer, one frontend developer, one manual QA, and one manager.
You can see the result here: https://portal.intela-bot-ai.com — this is the development environment. Right now, a few production instances are being prepared for educational and other types of customers.
#quickdevelopment #softwaredevelopment #java #jhipster #khipster #githubaction #saas #LLM #stripe #posgresql #projectmanagement #stripe #SpringMVC #SpringBoot #websockets #HTTP #jira #confluence #Slack #Sentry #docker-compose #docker #kubernetes #GitHub/GitLab #cicd #PostgreeSQL #ngzorro #ai #openedx #education #saas
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5824 USD Smart thermostat system
Embedded Systems & Microcontrollers
Developing a custom PCB and firmware for a smart thermostat that communicates seamlessly with a server over WiFi. Built from the ground up on the ESP32 platform, the thermostat offers flexible connectivity options, allowing communication through a server or directly with mobile applications via Bluetooth.
Key Project Highlights:
… • Custom PCB Design: Designed a robust electronic board based on the ESP32, incorporating both wired and Bluetooth sensor connectivity to enhance functionality and data accuracy.
• Embedded Firmware Development: Developed efficient, high-performance firmware in C++ using the ESP-IDF library, ensuring reliable communication with the server over secure protocols.
• Protocols and Connectivity: Implemented HTTPS and MQTTS protocols for secure and reliable data transmission, enabling the thermostat to securely send and receive data from the server.
• Integration with External Sensors: Configured and integrated both wired and Bluetooth sensors, allowing real-time environmental data to be collected and processed by the thermostat.
• EMS Compliance: The board successfully passed Electromagnetic Susceptibility (EMS) compliance, ensuring reliability and safety in varied operational environments.
Technical Skills Highlighted:
• Embedded Systems Design and Firmware Development: Extensive experience in ESP32 firmware programming and embedded C++ development, optimizing for reliability and low-latency communication.
• PCB Design and Sensor Integration: Expertise in designing PCBs with ESP32, as well as integrating and calibrating external sensors for precise data collection.
• Secure Communication Protocols: Proficient in implementing secure communication protocols (HTTPS, MQTTS), ensuring data integrity and security during server interactions.
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Pulse V – mobile applications iOS and Android + CRM
Apps for iOS (iPhone and iPad)
In this project, our team of three developed three key components:
1. Native Mobile Applications: iOS and Android
2. Backend API and CRM
… 3. Firmware for the ESP32 microcontroller
Project Objective:
The primary goal of this project was to develop mobile applications that enable users to control specific health equipment via Bluetooth. The CRM system was designed to assist with customer management, tracking of modes, processing payments, and monitoring device usage. The mobile applications provide functionalities for user registration, authentication, selection of health programs, and management of program execution.
Technical Approach:
We selected the ESP32 microchip as the communication bridge between the mobile applications and the equipment’s control block, and developed custom firmware for the ESP32 to ensure seamless communication. After development, the mobile applications were published on the respective app stores for iOS and Android.
Timeline:
The entire project, from development to the publishing of the mobile applications, was completed in 10 working days.
Technologies Used:
• Mobile Applications: Developed using Kotlin Multiplatform Mobile (KMM) with Kotlin for Android and Swift for iOS.
• CRM and Backend API: Built using kHipster (jHipster), Spring Boot, Angular, and PostgreSQL, leveraging Kotlin and TypeScript.
• ESP32 Firmware: Programmed using the ESP-IDF framework in C.
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11 648 USD iOS and Android Mobile application for Smart Home project
Apps for iOS (iPhone and iPad)
Convenient mobile (#iOS, #Android) app for managing heating at home and in the office.
#Android part written in Kotlin, #iOS - Swift. Common business logic - #KMM.
… UI builds on #JetpackCompose and #SwiftUI.
Communication with devices over #Wifi and #bluetooth (#BLE).
Transport protocols: #HTTP and #MQTT.
Automatic App build and publishing to Google Play and Apple App Store by #fastlane
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11 648 USD Parcel Managers
Desktop Apps
Server and mobile applications which are helping to manage parcels on the all way from China to Ukraine.
The Parcel Manager Mobile application was created to track each step of a parcel from a supplier in China to the end customer in Ukraine. In the application you can see all the information about the parcel (weight, dimensions of delivery, etc.which manager packaged it and what kind of goods it contains. QR code reader, multiple ways to upload pictures of parcels and packages minimizing the possibility of making mess and delay delivery.
… #SpringBoot #Ionic #Angular #MySQL5 #docker
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17 472 USD The Proforma Invoice
Web Programming
Monitoring the availability of goods in warehouses;
- Quick access to goods information (prices, options available, etc.and the
Operative creation of order card (from mobile application);
- Synchronization with the server (data on goods, order cards);
… Access to data in offline (all information is stored on a mobile phone during synchronization);
Convenient export of selected goods in Excel;
Generation of water marks on photos of goods when exported to Excel;
- Quick optimized search among tens of thousands of products.
#Javaee #JavaScript #MySQL5 #Bootstrap #PhoneGap #Ionic
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139 772 USD Green Power Oriented Home
Desktop Apps
Innovative tech ecosystem for electric heating and smart home management. Started from design, architecture, and following implementation of Backend, Frontend, Electronic board, Firmware, and Mobile application (KMM).
This project is in production and servers for electrical heaters with smart thermostats (https://gpo-store.com/).
#smarthome #iot #mobileapp #SpringBoot #MQTT #postgresql #influxdb #Kotlin #Angular #typescipt #architecture #PCB
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3800 USD Asap Cash - Stock Exchange
JavaDevelopment of the system of automation of the work of an online exchange (server part, web pages, hybrid mobile applications).
Reviews and compliments on completed projects 7
1 June 2025
250 USD
Discourse forum translator for Llama 3 API
Completed in the best possible way. I am satisfied with the work! Thank you for the project.
17 May 2025
120 USD
Set up Reddit parser on VPS
The performer is very meticulous in helping to solve all issues. Highly recommend for cooperation and will continue to cooperate.
6 March 2025
500 USD
Reddit parser with import of discussions to Discourse forum
The parser works as it should. Everything is done professionally and I will reach out again! Thank you!
3 January 2025
500 USD
Improvement of the Android application in Kotlin for the RFID tag scanner
The project was completed efficiently and quickly.
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5 October 2024
600 USD
Mobile App
I worked on creating a mobile application for our project, which included user registration, integration with CRM, as well as developing an interface for working with programs and Bluetooth devices. The contractor proved to be a high-level professional: he responded promptly to all requests, made necessary adjustments, and provided valuable advice on improving functionality. All tasks were completed with high quality and on time, while adhering to all technical requirements and development standards.
I would like to specifically highlight the competent approach to organizing work: each stage was discussed in detail, and as a result, we received a fully functional product ready for use. I recommend for collaboration on mobile development, especially if attention to detail and a high level of professionalism are required.
14 January 2024
200 USD
Virtual Shelly EM Software Running on Docker / Data from MQTT
The project went well. The project was successfully implemented in collaboration with Petro. We look forward to working with you again.
18 June 2020
23 USD
Java OpenCV обнаружение клонированных участков на изображениях
Отлично справился с задачей, знает свое дело.
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Discourse forum translator for Llama 3 API
250 USD
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Set up Reddit parser on VPS
120 USD
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Reddit parser with import of discussions to Discourse forum
500 USD
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500 USD
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1165 USD
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110 USD
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