Ростислав

Rostyslav Piontkovskyi
Phone: [open contact info](look above in the "contact info" section)
E-mail: [open contact info](look above in the "contact info" section)

PYTHON DEVELOPER

EDUCATION:
• 2003 – 2008: National Aviation University Institute of Electrical and Electronics Engineers, Kiev.
Obtained specialty – «Engineer of Radio Equipment and Television».

SKILLS:
• Experience with Python 10+ years. Experience with Python frameworks: Django, Flask, Tornado,
aiohttp, Sanic, FastAPI;
• Experience with databases: PostgreSQL, MySQL, Cassandra, MongoDB, Redis. Experience in
optimization of database structures and queries, indexing of tables, sharding;
• Experience in testing: End-to-End, component testing, unit tests;
• Experience with monitoring systems: Sentry, Grafana, issues investigation and debug skills;
• Experience with microservice architecture, queues (Kafka, RabbitMQ), periodic tasks (Celery),
caches (Redis, memcached);
• Experience with ETL processes: Apache Spark, Pandas dataframes;
• Experience with CI/CD processes. Experience with Docker, Jenkins, nginx, Unix, systemd,
gunicorn, GIT, Confluence;
• Experience with Agile and Scrum methodologies;
• Experience with AWS (S3, Lambda, DynamoDB, API Gateway, SNS, ECR, ECS, VPC, Access rules);
• Experience in organization of architecture and scaling of projects;
• Experience in mentoring of the 3 developers – code quality check and code review, assistance in
organizing of code architecture;
• Familiar with frontend: JavaScript, CSS, HTML;
• Experience in Network Engineering: setup of LAN, WAN, Wireless networks and equipment
(Cisco certificates);
• English – B2.

EXPERIENCE:
Jun 2022 – Present: Python Developer in sphere of gambling, International.
• Integration of payment system API (from Europe/Canada) on Django and FastAPI. Working with
core services, code refactoring, test coverage;
• Working with MongoDB and PostgreSQL;
• Working with AWS. Development of architecture and scaling of microservices;
• Component and E2E tests. Writing of documentation;
• Close work with frontend teams.
Nov 2019 – Jun 2022: Python Developer in «Amadeus», International.
• Development of applications and services on Python to adapt travel provider protocols (XML) to
the core system;
• Working with SOAP and REST protocols;
• Working on End-to-End, component testing, writing of unit tests;
• Diagnostic and fixing of services issues and bugs;
• Working with Agile and Scrum methodologies (plannings, retrospectives, demos to the clients).

Jan 2019 – Nov 2019: Python Developer in «SoftServe», International.
• Development of SaaS systems to calculate data from large datasets for Deloitte (USA audit
company);
• Work with Flask and Sanic frameworks (writing code, test coverage, debug);
• Work with CI/CD: Ansible, Jenkins, GIT, Confluence;
• Work with Apache Spark, CassandraDB, Pandas;
• Work with Scrum and Agile methodologies.

Jun 2018 – Dec 2018: Python Developer in «Education Ecosystem», International.
• Support and rewriting legacy code. Migrate from on Django_1.6 (Python 2) to Django_2.0
(Python 3);
• Develop of features for cryptocurrency project in the field of online education;
• Work with PostgreSQL (data migrations, optimization of queries, DB tables restructure);
• Writing of unittests and bug fixing.

Dec 2016 – Jun 2018: Python Developer in «Node Ads», Ukraine.
• Development of CRM system on Django for 10 000 users;
• Development of microservices on aiohttp and Flasks for interactions with central monolit;
• Work with CI\CD: Docker Compose, Docker, GitLab, nginx, systemd, gunicorn, Linux servers;
• Work with PostgreSQL database, optimize queries, develop DB tables schemas, create
migrations;
• Testing of services and bug fixing.

2010 – 2015: Computer Network Engineer in «Wi-Fi Bar Ukraine», Ukraine.
• Setup, installation and supporting Wi-Fi networks based on Cisco and Aruba wireless AP;
• Work with the Cisco switches, routers, Wireless Controller – 5508 and Aruba Airwave;
• Technical support of clients.