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Кирилл Кривин

@0008097

Python backend engineer at Expert-Pro LLC who upgraded a production billing platform to Python 3.12 and Django 5.2 with zero downtime.

Russian Federation

Message

At Expert-Pro LLC, I migrated the core billing platform from Python 3.7 and Django 2.2 to Python 3.12 and Django 5.2 with zero downtime. I also implemented idempotent message processing and transactional outbox publishing in a FastAPI and RabbitMQ notification service.

I work on billing calculations and monthly document processing for a multi-tenant SaaS platform, including receipt assembly on S3 and data exports to the state GIS ZhKKh system. Previously, at Web Development Team, I developed Django REST API features, optimized PostgreSQL queries, and maintained background jobs and Kafka integrations.

Experience

Work history, roles, and key accomplishments

Current

Backend Developer (Python)

Current

Expert-Pro LLC

Oct 2024 - Present (2 years)

Developed and maintained a multi-tenant SaaS billing platform serving 110 organizations and 100K+ personal accounts. Migrated the core application from Python 3.7 to 3.12 and Django 2.2 to 5.2 with zero downtime, and implemented idempotent message processing and transactional outbox publishing in a FastAPI/RabbitMQ service.

Web Developer (Python, Django)

Web Development Team

Dec 2022 - Oct 2024 (1 year 10 months)

Developed backend features and REST API endpoints with Django and Django REST Framework. Optimized PostgreSQL access through Django ORM, implemented background jobs with Celery and Redis, and maintained Apache Kafka integration.