Subscriptions & purchases
Built and integrated a backend library to manage subscriptions across Google Play, Apple Store, and web.
Full-stack Python engineer
Build reliable backends, integrations, and product features.
I work across Python services, APIs, data stores, and cloud infrastructure — with a focus on stability, observability, and developer experience.
Highlights
FinTech accounting platform
Refactored and stabilized a double-entry accounting system; unified environments and improved test speed.
Productivity & auth systems
Delivered features for productivity tooling and a unified authorization/user data service with safe migrations.
Experience
- AB test app development; internal library development for subscription and purchase management.
- Integrations with Google Play / Apple Store APIs; rollout across multiple backends.
- Refactored a financial accounting system (double-entry) and standardized environments.
- Improved testing (pytest migration) and developer tooling; integrated Plaid and API docs.
- Built product features for a productivity app and a unified authorization/user data service.
- Worked with trunk-based development and zero-downtime migrations.
- Built Facebook messaging automation to simulate interactive ads and reply to user messages.
- Delivered a crypto/affiliate platform with KYC onboarding and verification flows.
- Shipped a logistics app with order matching, driver pickup, and Google Maps routing.
- Worked across multiple Django/Celery/PostgreSQL projects plus one Flask/MongoDB stack.
- Reviewed a high volume of student submissions across synchronous and async lessons.
- Provided detailed, actionable feedback to help students choose approaches and unblock tasks.
- Fed back on curriculum and tasks, suggesting adjustments to improve the learning system.
- Provisioned Linux servers for web deployments, including baseline hardening and updates.
- Established team tooling for PHP delivery (SFTP access, Git workflows, Redmine tracking).
- Optimized web and mail services for performance and deliverability.
- Built a Python parser for
asos.comand integrated imports into OpenCart catalog data.
Python development
- Built small Python utilities and CLI scripts to automate repetitive work and data processing.
- Developed web scrapers/parsers and normalized extracted data for storage and reporting.
- Improved code quality through refactoring, basic testing, and type hints.
Remote Linux system administration
- Administered multiple Linux servers hosting several websites each.
- Provisioning and configuring servers, web services (Apache, Nginx), and databases (MySQL).
- Managing domains and DNS; deploying new sites and updates.
- Setting up and maintaining mail services; keeping deliverability healthy.
- Supporting production systems: troubleshooting, configuration fixes, and performance tuning.
- Handling security issues: patching, access hardening, and anti-spam/anti-malware measures.
Frontend development
- Built pages from PSD designs using HTML5 and CSS3.
Skills
Backend
- Python
- Django
- Flask
- Celery
- SQLAlchemy
- REST
- GraphQL
Data & infra
- PostgreSQL
- MySQL
- Redis
- RabbitMQ
- ElasticSearch
- AWS
- Docker
Frontend & tools
- React
- Vue
- TypeScript
- Webpack
- pytest
- mypy
- CI/CD
Contact
Best way to reach me: oleg.smedyuk@gmail.com