Open to opportunities

Mark Kryl

@markkryl

Message

I build high-load Python microservices, integrations, and LLM-powered analytics tools.

Zimbabwe

Message

What I'm looking for

I'm looking to build scalable Python backend systems, microservices, and integrations, with ownership from architecture and API design through optimization, observability, testing, and production support.

I've built microservices and external ticketing integrations at ItFox, improving system performance by about 30% and implementing asynchronous processing with FastStream and Taskiq.

I designed authentication, authorization, WebSocket APIs, and scalable data storage for YLAB Development's high-load digital platform. I also migrated functionality from Django to FastAPI, set up CI/CD and Docker workflows, and improved monitoring with Sentry.

Across backend platforms, I work from API and architecture design through SQL optimization, testing, production support, and technical decisions. I've also delivered a LangChain and Streamlit reporting chat interface that reduced token consumption by about 30% and improved user-scenario coverage by about 40%.

Experience

Work history, roles, and key accomplishments

Backend Python Developer

ItFox

Feb 2025 - Mar 2026 (1 year 1 month)

Designed microservice architecture for ticketing integration, optimized SQL queries improving performance by ~30%, implemented async processing with FastStream and Taskiq, and contributed to RBAC and monitoring systems.

Python fastAPI PostgreSQL MongoDB Redis Kafka gRPC REST WebSockets Celery TaskIQ RabbitMQ Docker Kubernetes Nginx CI CD Prometheus Sentry Pytest Git Jira Confluence Agile Scrum Prompt Engineering

Backend Developer

YLAB Development

Nov 2022 - Feb 2025 (2 years 3 months)

Implemented authentication and authorization systems, developed WebSocket APIs, optimized data storage between PostgreSQL and MongoDB, migrated Django to FastAPI, and set up CI/CD and monitoring.

Python fastAPI Django DRF PostgreSQL MongoDB Redis Kafka gRPC REST WebSockets Celery TaskIQ RabbitMQ Docker Kubernetes Nginx CI CD Prometheus Sentry Pytest Git Jira Confluence Agile Scrum

Backend Developer

Optimism.ru

Nov 2021 - Oct 2022 (11 months)

Upgraded authentication and authorization systems, refactored legacy components, developed unit and integration tests, and contributed to application logic and architecture design.