Danylo Boleiko - CV Python Backend Developer

- Built and maintained FastAPI services and data workflows supporting multiple products. - Integrated LLMs (summarization, Q&A, sentiment classification) into existing workflows. - Delivered API endpoints, caching layers, and charting data feeds for PUMP and SEMICONDUCTORS products. - Designed Prefect 2 orchestration for the QSIM project with retries and monitoring, and implemented a proxy‑free Reddit ingestion flow to reduce costs and improve stability. - Improved Reddit parsers in Airflow by approximately 5x. - Reduced MongoDB query latency using targeted indexes and optimized aggregation pipelines.

Bachelor’s degree in Software Engineering (Bachelor’s in Software Engineering)

Tech stack: - Python - FastAPI - SQLAlchemy - SQLModel - Celery - RabbitMQ Data & Orchestration: - Prefect - Airflow - Pandas - PyArrow - ETL Datastores: - PostgreSQL - MongoDB - ClickHouse - Redis - InfluxDB - S3 - R2 - BigQuery Testing & Quality: - Pytest - Ruff Soft skills: - Clear verbal and written communication, teamwork - Critical thinking, problem‑solving, decision‑making, attention to detail - Time management: prioritization, meeting deadlines - Client focus: active listening, stakeholder communication

Английский

Languages:
- Ukrainian — Native
- English — Upper‑Intermediate
- Russian — Fluent

Mobility:
- Open to relocation.

Work authorization:
- Have the right to work in Cyprus (temporary protection status for Ukrainians).