Андрій

Andrii Sydorenko
Kyiv, Ukraine tg: @asd489
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section)

Summary:

Senior Python Engineer with 10+ years of experience building high-load, scalable backend
systems and data platforms. Specialized in designing asynchronous microservices and
high-throughput data pipelines using FastAPI, ClickHouse, and PostgreSQL.

Proven expertise in processing and transforming large-scale datasets (billions of records),
building analytical infrastructures with real-time ingestion, and ensuring data consistency
across distributed systems.

Strong background in database design and optimization, including advanced SQL and
PL/pgSQL development, as well as performance tuning of complex queries and data
workflows.

Experienced in system design, performance optimization, and cloud-native solutions (AWS,
Docker). Passionate about clean architecture, efficient data processing, and solving complex
engineering challenges.

Professional skills:
Languages & Frameworks: Python, FastAPI, Django, Flask, Tornado, Falcon, Node.js, Go
Async & Background Processing:
Celery, Kafka (AIOKafka consumers), event-bus patterns, asyncio
multiprocessing/multithreading, WebSockets
Databases: Clickhouse, PostgreSQL, MySQL, SQLite, MongoDB, Redis
Cloud & Infrastructure:
​ AWS (Lambda, Cognito, DynamoDB, S3, Amplify, AppSync)
Docker, docker-compose
Linux (Debian/Ubuntu), SSH
Observability & Reliability: Prometheus metrics, structured logging (structlog)

Experience:

Checkbox
Jun 2025 – Mar 2026
Position: Python Engineer
Key Responsibilities & Achievements:
Developed asynchronous Kafka consumers (AIOKafka) for processing financial reporting
events and building aggregated datasets;
Designed and implemented high-throughput data pipelines for transferring and
transforming large datasets from PostgreSQL to ClickHouse, processing billions of
records;
Built ClickHouse data infrastructure using Kafka Engine, Materialized Views, and
Distributed tables to support scalable analytics workloads;
Implemented automated data validation and consistency checks between PostgreSQL
 and ClickHouse to ensure integrity of migrated datasets;
Developed Python workers and CLI tools for large-scale data migration, including
batching, time-range partitioning, and failure-safe retries.

TECHNO-POINT LLC
Jul 2021 – Aug 2023
Position: Python developer
Key Responsibilities & Achievements:
Developing a scalable backend infrastructure for online gambling;
Developed asynchronous microservices using FastAPI to handle real-time gameplay
events and user interactions;
Integrated payment system with real-time validation of deposits and withdrawals.

Hebron IT Academy
Aug 2020 – Jun 2021
Position: Mentor

JetSoftPro
Feb 2020 – Jul 2020
Position: Python developer
Key Responsibilities & Achievements:
Worked on a mobile backend solution using AWS;
Developed serverless functions and GraphQL APIs with AWS AppSync.

Cerera Technologies
Mar 2018 – Dec 2019
Position: Python developer
Key Responsibilities & Achievements:
Developed automated email station system using Flask, WebSockets, PySerial, and
Celery;
Deployed the system using Docker and docker-compose.

Zero Element inc.
Nov 2016 – Aug 2017
Position: Python developer

SoftServe
Oct 2015 – Oct 2016
Position: Python developer

Education:
The National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"

Languages:
Ukrainian – fluent
Russian – fluent
English – intermediate