Працював в 5 компаніях 6 років 2 місяці
IT
Python Developer
Upwork – Freelancer
IT
9 місяців
08.2025 - до теперішнього часу
- Engineered FastAPI microservices (PostgreSQL + Redis) ingesting 200k+ records/day with <100 ms p95 latency.
- Built Scrapy + Playwright pipelines with captcha bypass, retries & deduplication — 99%+ delivery rate.
- Designed RabbitMQ-driven ETL workflows replacing manual exports, cutting processing time by ~60%.
- Delivered Shopify-compatible CSV exporters handling complex product/variant logic for e-commerce clients.
- Extract data from websocket in real-time and save to database
Backend Developer & Data Delivery
Dex223
IT
2 роки
09.2023 - 08.2025
- Built REST & GraphQL APIs aggregating on-chain and off-chain data, powering live DeFi.
- Developed async FastAPI services + Redis caching serving 1M+ daily events with high availability.
- Created Web3.py event listeners and ETL pipelines for marketing analytics and user attribution.
- Build custom CRM for marketing department for optimize inner process
Backend Developer & Data Delivery
Callisto Enterprise
IT
1 рік 2 місяці
08.2022 - 09.2023
- Delivered data aggregation platform (FastAPI + PostgreSQL + Redis) for 3+ enterprise clients.
- Built pipelines and Web3 event collectors; improved response time by ~40%.
Data Processing Specialist
DataOx
IT
1 рік 3 місяці
06.2021 - 08.2022
- Scraped and processed 10M+ rows of structured data using Scrapy, BeautifulSoup, and Pandas.
- Built Flask/Django internal APIs; optimised slow queries cutting average pipeline runtime by 35%.
- Creating scripts for automation with Selenium
Python Developer
Upwork – Freelancer
IT
1 рік 4 місяці
03.2020 - 06.2021
- Developed Python & Node.js backend solutions for 10+ international clients across e-commerce and SaaS.
- Automated deployment and scaling with AWS (EC2, S3) and Docker; achieved 99.5% uptime SLA.
Ключова інформація
- Languages
Python
Node.js
SQL
- Databases
- PostgreSQL
- Redis
- MongoDB
- Elasticsearch
- Scraping
- Scrapy
- Playwright
- Selenium
- Data / CV
- Pandas
- NumPy
- OpenCV
- Async
- Celery
- FastStream
- RabbitMQ
- Blockchain
- Web3.py
- TheGraph
- ORM
- SQLAlchemy
- DjangoORM
- Frontend
- HTML
- CSS
- JavaScript
- DevOps
- Docker
- k8s
- AWS ec2/s3/lambda
- Other
- REST
- GraphQL
- AI
- ChatGPT API
Навчався в 1 закладі
NTUU KPI
FAM
Киев, 2019
Володіє мовами
Англійська
поглиблений
Додаткова інформація
Компьютерные навыки
Python Developer with 5+ years delivering production-grade backend systems, high-throughput data pipelines, andautomation platforms. Built distributed scrapers processing 200k+ records/day, async FastAPI services handlingmillions of events, and blockchain data APIs powering live DeFi products. Strong ownership mindset — fromarchitecture to deployment.
Костянтин Степанович
Костянтин Степанович
Python Developer
Київ
повна зайнятість
Характер роботи: віддалена робота
Остання активність 1 місяць тому