Denis Maryanskiy

- Developed a watermarking system that customizes file output on user actions, ensuring file integrity and automatic cleanup of generated files - Designed a graph-based role system with fine-grained permissions, improving UX and maintainability across the software hierarchy - Replaced 80% of legacy model code with a normalized schema, removing implicit logic and simplifying it - Implemented CI pipeline integrating unit tests, static analysis, and formatters, significantly improving code reliability

- Launched driver registration in 4 countires, enabling Yango to expand into new markets and boosting registrations by 1.5x - Built a scalable platform solution for dynamic driver registration across countries and employment types – enabled faster rollout with no code changes - Migrated profile CRUD from legacy C++ FastCGI to Userver, reducing maintenance overhead and improving performance - Designed proxy service for driver state management, splitting monolith into microservices and reducing infra costs

As a part of the development team I'm working on two projects using Django. My responsibilities include:• Designing of Django ORM models.• Covering projects with unittests.• Editing HTML templates using Django Template Language.• Writing new management commands.Stack: Python 3.6, Django 2.2

As a part of the legal team developed an anonymizing software to replace PII in documents with synthetic values. My responsibilities included: • Developing analyzers and replacers for different data types. • Developing new pipelines to add replacement with constant expressions. • Collect and analyze results to find vulnerabilities and defects of replacers. • Adding unit tests to fully cover code. Stack: Python, Flask, Allennlp, SQLAlchemy, Pytest.