Олександра

Oleksandra Shershen
Python Developer
[відкрити контакти](див. вище в блоці «контактна інформація») Telegram Linkedin Github Kyiv, Ukraine

SUMMARY

Python Developer with solid experience building production-grade backend systems and microservice architectures,
specializing in FastAPI, Django, and DRF for high-load REST APIs and asynchronous services. Built a microservice
architecture from scratch to 20+ services, launching an MVP for a new e-commerce product within 5 months.
Skilled in PostgreSQL, MongoDB, Redis, and Elasticsearch, with a focus on query optimization and caching strategies, and in
building async systems with asyncio, aiohttp, and Celery/RabbitMQ for real-time inter-service communication.
Experienced with CI/CD and containerized deployments (Docker, Kubernetes), plus monitoring via Sentry, Grafana, and
Kibana.
Automated testing workflows for security devices, reducing manual QA effort and accelerating release cycles; developed
desktop applications and scripts for mass production and calibration.
Strong background in web scraping (BeautifulSoup4, Selenium, Scrapy) and data processing (NumPy, Pandas). Comfortable
with Git workflows and Agile collaboration using Jira and Confluence.

SKILLS

Software Engineering & Python: Python 3.9+, OOP, SOLID/DRY/KISS, Design Patterns, Algorithms, Data Structures
DevOps & CI/CD: Docker, Kubernetes, Argo Workflows, AWS, Jenkins, GitHub Actions, Git, GitHub, GitLab, Bitbucket, Gerrit
Testing & Code Quality: pytest, unitest, TDD, BDD, TestRail, CI testing pipelines
Backend Architecture & APIs: Django, DRF, Flask, FastAPI, GraphQL, REST, HTTP/HTTPS, TCP, SSL/TLS, JWT, Sockets
Concurrency & Performance: Multiprocessing, Multithreading, asyncio, aiohttp, Celery, RabbitMQ
Databases & Caching & Search: PostgreSQL, SQLite, MongoDB, Redis, Elastic search
Data, Automation & Tools: NumPy, Pandas, Matplotlib, Seaborn, Jupyter Notebook, Tableau, Power BI, BeautifulSoup4,
Selenium, Scrapy
Frontend (basics): HTML, CSS, Bootstrap, JavaScript
Monitoring & Observability: Sentry, Grafana, Kibana
Collaboration & Workflow: Jira, Confluence, Notion, Trello, Slack

PROFESSIONAL EXPERIENCE

ViyarTech, Python Engineer Oct 2025 – Present
Designed and implemented high-load REST CRUD APIs and service gateways within a microservice architecture spanning 20+
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services
Built asynchronous services using asyncio/aiohttp with task queues via Celery/RabbitMQ for real-time inter-service
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communication
Optimized MongoDB, PostgreSQL, and Elasticsearch — query/schema/index tuning plus Redis caching to cut database load
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and API response times
Wrote unit/integration tests (pytest, unittest) and refactored legacy APIs while preserving backward compatibility
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Containerized services with Docker, deployed to Kubernetes, and maintained CI/CD pipelines to streamline releases
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Developed production-grade backend services and internal corporate web applications
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Participated in code reviews, architectural discussions, and cross-team technical decisions
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Technologies: Python 3, FastAPI, Pydantic, MongoDB, PostgreSQL, Redis, Elasticsearch, asyncio, aiohttp, Celery, RabbitMQ,
Docker, Kubernetes, pytest, unittest, CI/CD, REST, Microservices

Ajax Systems, Python Developer Sep 2024 – Oct 2025
Implemented automated device testing with Pytest, optimizing the test environment for reliability and efficiency
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Developed desktop applications for automating mass production, device testing, and calibration of security, video, and smart-
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home devices
Created auxiliary tools, scripts, algorithms, and APIs for integration with databases, third-party software, and cross-team
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systems
Streamlined CI/CD processes with Jenkins, Docker, and TestRail, automating version management and workflows
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 •Applied BDD practices, designing rules for test scenarios and mentoring Manual QA engineers, increasing test coverage and
reducing regression testing time
Technologies: Python3, Multiprocessing, Threading, Socket, The Python Standard Libraries, PyInstaller, Docker, docker-
compose, Jenkins, MongoDB, FastAPI, BDD, TestRail, pytest

GlobalLogic, Software Engineer for Android Sep 2023 – Jan 2024
•Collaborated with cross-functional teams to develop advanced in-car cockpit solutions
using C++, AOSP, Java, JNI, and embedded systems.
•Created innovative software features to enhance user experience and safety in automotive environments.
•Implemented performance optimizations for a more responsive and efficient system.
•Conducted rigorous testing and debugging to ensure software reliability and stability.
•Developed and optimized embedded systems software for efficient operation within hardware constraints.
•Worked closely with hardware engineers and software developers to deliver cohesive and user-friendly solutions.
•Maintained comprehensive documentation to facilitate knowledge sharing and future development.

CHI Software, C++ Developer Aug 2022 – Dec 2023
•Assisted in the design, development, and maintenance of C++
applications under the guidance of senior developers.
•Continuously applied software development best practices to ensure code quality and maintainability.
•Participated in requirements gathering and translated them into development tasks.
•Contributed to maintaining and refactoring codebases for improved readability and performance.
•Identified and resolved bugs to ensure application stability.
•Wrote and executed unit tests to validate code functionality.
•Created and updated documentation for features, code changes, and processes.
•Collaborated with senior developers, designers, and QA engineers for seamless project delivery.
•Assisted in integrating C++ applications with third-party libraries and APIs.

PROJECTS
Library Service(Group Project) Jan 2024 – Sep 2024
•Led a team of 5 developers, conducted code reviews, ensured coding standards
•Implemented RESTful APIs (borrowings, users, payments) and integrated Stripe
•Dockerized the app and documented APIs, DB schemas, and deployment
Technologies: Stripe, Django Q, Redis, Postgres, DRF, REST API, Docker, Telegram Bot, Swagger, JWT

Airport API Service Jan 2024 – Sep 2024
•Developed RESTful APIs for airports, flights, crews, orders, and tickets
•Implemented JWT authentication, role-based permissions, and Swagger docs
•Wrote tests, optimized DB schemas, and deployed with Docker
Technologies: DRF, REST API, Postgres, Docker, Swagger, JWT

Task Manager Jan 2024 – Sep 2024
•Designed Django backend and responsive frontend (HTML5, CSS3, Bootstrap, JS)
•Built task management features, Kanban board, and calendar view
•Implemented authentication, deployment, and documentation
Technologies: Django, Python3, HTML5, CSS3, Bootstrap, JavaScript, SQLite (development), PostgreSQL (production)

Python Vacancies Analysis Jan 2024 – Sep 2024
•Developed Python scripts with BeautifulSoup4 and Selenium to scrape and clean job listing data, minimizing server load and
complying with usage policies.
•Analyzed data with Pandas and NumPy to identify technology trends, visualizing results with Matplotlib and Seaborn.
Technologies: Pandas, Matplotlib, BeautifulSoup4, Selenium, Seaborn

LANGUAGES

English (Upper-Intermediate) | Ukranian (Native)

EDUCATION
Kharkiv National University Of RadioElectronics, Bachelor of Computer Science 2021 – 2025

COURSES

Python Developer, Mate Academy Mar 2024 – Jul 2024