Костянтин

Kostiantyn Marchuk
Python Developer
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) Vinnytsia, Ukraine LinkedIn

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SUMMARY
I'm Python Backend Developer with over two years of experience developing web services using FastAPI,
Django, PostgreSQL as well as integrating various third-party services. Experienced in integrating LLMs and
developing AI-powered features. Proficient in Google Cloud Platform with hands-on experience in setting up
CI/CD pipelines with GitHub Actions, automating web scraping tasks, and containerizing services with Docker.
I have a B2 level of English, which allows me to work effectively in international teams and communicate
technical concepts clearly

Skills
Python 3.7+ & OOP Development Practices: TDD, DRY, KISS

Web Scraping: Selenium, Scrapy Web Frameworks: FastAPI, Django, DRF

Databases & ORM: PostgreSQL, MongoDB, SQLite, Front-end: HTML, CSS, Bootstrap, JavaScript
Redis, SQLAlchemy, DjangoORM (basics)

DevOps: Google Cloud Platform(GCP), Docker, Networking & Security: HTTP, HTTPS,
GitHub Actions WebSockets, JWT

Tools: Git, GitHub, Debugger, Pytest, Trello Data Processing & Analysis: Pandas, NumPy,
Pydantic, Matplotlib
AI: OpenAI API, Google Gemini API, Prompt
engineering Background Processing/Asynchronous Tasks:
Celery, Celery Beat

Professional Experience
Python Backend Developer, Renesandro 04/2024 – present
Achievements Remote, Ukraine
Led migration of legacy Flask services to FastAPI.
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Architected and deployed scalable GCP infrastructure (Compute Engine, Managed
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Instance Groups, Cloud SQL, Cloud Storage).
Responsibilities
Design and implement REST and WebSocket APIs to support real-time frontend
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features.
Maintain and enhance existing code.
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Manage CI/CD pipelines and containerize services with Docker.
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Conduct code reviews, enforce coding standards, and mentor junior developers.
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Collaborate with team in sprint planning and decision-making.
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Integrate third-party APIs and external services to support business features
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Technologies Used: Python, FastAPI, Flask (legacy), Google Cloud Platform
(Compute Engine, Cloud SQL, Cloud Storage, Artifact Registry), Docker, PostgreSQL,
Redis, MongoDB, GitHub Actions, WebSockets, REST API, CI/CD.
Education
Bachelor, Vinnytsia Institute of Trade and Economics of Kyiv National University of 09/2024 – present
Trade and Economis Vinnytsia, Ukraine

Junior Bachelor, Vinnytsia Institute of Trade and Economics of Kyiv National 09/2022 – 06/2024
University of Trade and Economis

Projects
Job Vacancy Scraper and Data Analysis, January 2024
Role: Developer
Implemented a Python scraper for Djinni job board using Selenium and BeautifulSoup, respecting ethical
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guidelines (robots.txt checks, rate limiting).
Processed and cleaned scraped data with Pandas: stored results in CSV/DB, performed aggregation and
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basic analysis.
Added configurable logging and parameters to ensure reliability and maintainability.
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Visualized findings with Plotly
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Technologies Used: Python, Selenium, BeautifulSoup, Pandas, Plotly.

Library Service, December 2023
Project Description: Development of a web service for library automation.
Role: Team Lead
Led a team of five developers in the implementation of various features.
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Responsible for the overall project architecture and design.
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Oversaw the integration of the Stripe payment system for service payments.
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Technologies Used: Python, Django REST Framework, Celery, Aiogram, Docker, Stripe, Postgres.

Planetarium API Service, November 2023
Project Description: Development of an API service for planetarium management.
Role: Developer
Played a key role in the implementation of CRUD operations, authentication, and filtering.
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Contributed to the writing of tests and documentation using Swagger.
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Technologies Used: Python, Django REST Framework, Docker.

Restaurant Kitchen Service, November 2023
Project Description: Development of a web service for restaurant kitchen management.
Role: Developer
Contributed to the development of functionality for managing orders, dishes, ingredients, and chefs.
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Collaborated in the use of Render for hosting the web application.
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Technologies Used: Python, Django, Postgres, Render.

Self-Education
Python developer, Mate Academy

English, Flash Studies
Upper-Intermediate - Certificate

Engaged in continuous learning through exploration of documentation from reputable sources,
including:
Python Official Documentation
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Django Documentation
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Django REST Framework Documentation
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