Viacheslav

Location :Ukraine, Odesa
Viacheslav Varvianskyi Mobile: [відкрити контакти](див. вище в блоці «контактна інформація»)
Email: [відкрити контакти](див. вище в блоці «контактна інформація»)
Python Developer Telegram: @ViacheslavUK
LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація»)
GitHub: github.com/varvianskyiviach

SUMMARY
As an experienced Python developer with over 4 years of experience in software development, I think beyond the
code. Diving deep into the business domain, understanding the customer needs and pains, I define solutions to those
problems with the team. I have excellent problem-solving skills, actively pursue self-development opportunities,
and stay updated with new technologies and technology trends. Passionate about my profession, I prioritize writing
maintainable and scalable applications, advocating for the best coding practices. My goal is simple: to create
applications that deliver value to both businesses and consumers.

PROFESSIONAL EXPERIENCE

AWWCOR Inc. Jul 2022 – Mar 2025
Backend Developer (Python) (2 yrs 8 mos)
Methodology: Scrum, 2-week sprints
Project: Development and maintenance of a comprehensive CRM system for an outstaffing agency.
Responsibilities/Achievements:
 Worked on internal CRM used to manage specialists` profiles, customer company profiles, time tracking, billing
etc.;
 Developed backend for the above-mentioned CRM using Django Rest Framework;
 Collaborated with the Frontend Developers to design and integrate new features;
 Implemented a time tracking and billing system used by the specialists to report time worked on the project,
automatically issue invoices to the customers, charge customers and keep track of accrued earnings and payouts
for the specialists;
 Integrated the third-party service Wise to issue payouts automatically;
 Integrated Sentry to capture errors and track performance, identify bottleneck, facilitate debugging and optimize
the app;
 Investigated and optimized the slowest endpoints;
 Scraped various sources using Selenium for vacancies and CVs to be used by Recruiters and Sales team for cold
outreach;
 Optimized web application performance using async for asynchronous programming to create a faster web
scraper;
 Containerized the app with Docker and cloud deployment to AWS App Runner, effectively eliminating server
misconfiguration issues which were frequent in the old setup with copying the code over SSH;
 Ensured stable operation of client-facing web services running in the cloud environment, including real-time
time tracking and invoice generation components;
 Conducting code reviews and participating in sprint planning;
 Optimized application performance, reducing average response time by 30% overall with 80% improvement on
the slowest endpoints and p95 latencies - 50% improvement.
MySport.Zone Dec 2020 – May 2022
Backend Developer (Python) (1 yr 6 mos)
Methodology: Kanban
Project: Sports competition management platform.
Responsibilities/Achievements:
 Developed the semi-autonomous web-based referee dashboard and the scoreboard using FastAPI;
 Implemented a time-window-aware consensus algorithm to reconcile points scoring from multiple side referees;
 Created dynamic UI elements and live updates for the scoreboard using JavaScript and AJAX;
 Participated in code reviews as a 2nd reviewer;
 Participated in discovery calls with the customers for the features I was supposed to implement, shadowing the
TL;
 Was deploying my own code all the way to prod (following Continuous Delivery methodology) and monitoring
the performance and stability of my deployments in New Relic.
 Learned about best practices of testing, CI/CD, secure infrastructure design from Senior colleagues.

SKILLS
 Language: Python3, JS;
 Frameworks and Libraries: Django, Django Rest Framework (DRF), FastAPI, Pydentic, BeautifulSoup4,
Selenium, Pandas, Celery, asyncio, aiohttp;
 Databases: PostgreSQL, MySQL, MongoDB, Redis;
 DevOps/Infrastructure: Docker, Docker-Compose, DigitalOcean, AWS, GitHub Action, Circle CI, Pre-
commit hooks;
 Quality tools: MyPy, Flake8, Black, Isort;
 Other: Pipenv, Postman, Linux, GIT, SSH;

LANGUAGES
 English B1  Ukrainian - native  Russian - native

EDUCATION
Master`s Degree in Economics Sep 2008 – Jun 2013
Donetsk National University